Android程序示例

时间  2019-12-08 标签 android 程序 示例

目录java

Android代码示例

OptionsMenu

@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main_menu, menu);

        return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        TextView label = (TextView)findViewById(R.id.label);
        
        switch (item.getItemId()) {
        case R.id.main_menu_0:
            label.setText("打印，菜单ID：" + item.getItemId());
            return true;
        case R.id.main_menu_1:
            label.setText("新建，菜单ID：" + item.getItemId());
            return true;
        case R.id.main_menu_2:
            label.setText("邮件，菜单ID：" + item.getItemId());
            return true;
        case R.id.main_menu_3:
            label.setText("设置，菜单ID：" + item.getItemId());
            return true;
        case R.id.main_menu_4:
            label.setText("订阅，菜单ID：" + item.getItemId());
            return true;
        default:
            return false;
        }
    }

全体文件：android

public class OptionMenu2Activity extends Activity {
    final static int MENU_00 = Menu.FIRST;
    final static int MENU_01 = Menu.FIRST+1;
    final static int MENU_02 = Menu.FIRST+2;
    final static int MENU_03 = Menu.FIRST+3;
    final static int MENU_04 = Menu.FIRST+4;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0,MENU_00,0,"打印").setIcon(R.drawable.pic0);
        menu.add(0,MENU_01,1,"新建").setIcon(R.drawable.pic1);
        menu.add(0,MENU_02,2,"邮件").setIcon(R.drawable.pic2);
        menu.add(0,MENU_03,3,"设置").setIcon(R.drawable.pic3);
        menu.add(0,MENU_04,4,"订阅").setIcon(R.drawable.pic4);
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        TextView label = (TextView)findViewById(R.id.label);
        
        switch (item.getItemId()) {
        case MENU_00:
            label.setText("打印，菜单ID：" + item.getItemId());
            return true;
        case MENU_01:
            label.setText("新建，菜单ID：" + item.getItemId());
            return true;
        case MENU_02:
            label.setText("邮件，菜单ID：" + item.getItemId());
            return true;
        case MENU_03:
            label.setText("设置，菜单ID：" + item.getItemId());
            return true;
        case MENU_04:
            label.setText("订阅，菜单ID：" + item.getItemId());
            return true;
        default:
            return false;
        }
    }
}

ImageButton

imageButton.setImageResource(R.drawable.download);
imageButton.setOnClickListener(new View.OnClickListener() {
    public void onClick(View view) {
    textView.setText("ImageButtonTest");
   }
});

CheckBox & RadioButton

  • checkBox
final CheckBox checkBox1= (CheckBox)findViewById(R.id.CheckBox01);
        final CheckBox checkBox2= (CheckBox)findViewById(R.id.CheckBox02);  
        CheckBox.OnClickListener checkboxListener = new CheckBox.OnClickListener(){
            @Override
            public void onClick(View v) {
                switch(v.getId()){
                case R.id.CheckBox01:
                    textView.setText("CheckBox01, isChecked:"+String.valueOf(checkBox1.isChecked()));
                    return;
                case R.id.CheckBox02:
                    textView.setText("CheckBox02, isChecked:"+String.valueOf(checkBox2.isChecked()));
                    return;
            }           
            }};     
        checkBox1.setOnClickListener(checkboxListener);
        checkBox2.setOnClickListener(checkboxListener);
  • RadioButton
final RadioButton radioButton1 = (RadioButton)findViewById(R.id.RadioButton01);
        final RadioButton radioButton2 = (RadioButton)findViewById(R.id.RadioButton02);
        RadioButton.OnClickListener radioButtonListener = new RadioButton.OnClickListener(){
            @Override
            public void onClick(View v) {
                switch(v.getId()){
                case R.id.RadioButton01:
                    textView.setText("RadioButton1 is selected");
                    return;
                case R.id.RadioButton02:
                    textView.setText("RadioButton2 is selected");;
                    return;
            }           
            }};     
        radioButton1.setOnClickListener(radioButtonListener);
        radioButton2.setOnClickListener(radioButtonListener);

Context Menu快捷菜单

public class ContextMenuActivity extends Activity {
    /** Called when the activity is first created. */
    final static int CONTEXT_MENU_1 = Menu.FIRST;
    final static int CONTEXT_MENU_2 = Menu.FIRST+1;
    final static int CONTEXT_MENU_3 = Menu.FIRST+2;
    TextView LabelView = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        LabelView = (TextView)findViewById(R.id.label);
        LabelView.setText(Html.fromHtml("<font color=\"#ff0000\">红色</font>其它颜色"));
        registerForContextMenu(LabelView);
    }
    
    @Override
    public void onCreateContextMenu(ContextMenu menu, 
            View v, ContextMenuInfo menuInfo){
        menu.setHeaderTitle("快捷菜单标题");
        menu.add(0, CONTEXT_MENU_1, 0,"菜单子项1");
        menu.add(0, CONTEXT_MENU_2, 1,"菜单子项2");
        menu.add(0, CONTEXT_MENU_3, 2,"菜单子项3");
    }
    
    @Override
    public boolean onContextItemSelected(MenuItem item){
        switch(item.getItemId()){
        case CONTEXT_MENU_1:
            LabelView.setText("菜单子项1");
            return true;
        case CONTEXT_MENU_2:
            LabelView.setText("菜单子项2");
            return true;
        case CONTEXT_MENU_3:
            LabelView.setText("菜单子项3");
            return true;
        }
    return false;
    }   
}

Key Event

public class KeyEventDemoActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        EditText entryText = (EditText)findViewById(R.id.entry);
        final CheckBox checkBox = (CheckBox)findViewById(R.id.block);
        final TextView labelView = (TextView)findViewById(R.id.label);
        entryText.setOnKeyListener(new OnKeyListener(){
            @Override
            public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {

                int metaState = keyEvent.getMetaState();
                int unicodeChar = keyEvent.getUnicodeChar();
                String msg = "";
                msg +="按键动做:" + String.valueOf(keyEvent.getAction())+"\n";
                msg +="按键代码:" + String.valueOf(keyCode)+"\n";
                msg +="按键字符:" + (char)unicodeChar+"\n";
                msg +="UNICODE:" + String.valueOf(unicodeChar)+"\n";
                msg +="重复次数:" + String.valueOf(keyEvent.getRepeatCount())+"\n";
                msg +="功能键状态:" + String.valueOf(metaState)+"\n";
                msg +="硬件编码:" + String.valueOf(keyEvent.getScanCode())+"\n";
                msg +="按键标志:" + String.valueOf(keyEvent.getFlags())+"\n";
                labelView.setText(msg);
        
                if (checkBox.isChecked())
                    return true;
                else
                    return false;
            }       
        });  
    }
}

ListView Demo

public class ListViewDemoActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        final TextView textView = (TextView)findViewById(R.id.TextView01);
        ListView listView = (ListView)findViewById(R.id.ListView01);
        
        List<String> list  = new ArrayList<String>();
        list .add("ListView子项1");
        list .add("ListView子项2");
        list .add("ListView子项3");
        
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 
                android.R.layout.simple_list_item_1, list );
        listView.setAdapter(adapter);
        
        AdapterView.OnItemClickListener listViewListener = new AdapterView.OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { 
                String msg = "父View："+arg0.toString()+"\n"+
                "子View："+arg1.toString()+"\n"+
                "位置："+String.valueOf(arg2)+"，ID："+String.valueOf(arg3);
                textView.setText(msg);
            }};
            
        listView.setOnItemClickListener(listViewListener);
    }
}
package edu.hrbeu.SubMenu2;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.widget.TextView;

public class SubMenu2Activity extends Activity {
    final static int MENU_00 = Menu.FIRST;
    final static int MENU_01 = Menu.FIRST+1;
    final static int SUB_MENU_00_01 = Menu.FIRST+2;
    final static int SUB_MENU_01_00 = Menu.FIRST+3;
    final static int SUB_MENU_01_01 = Menu.FIRST+4;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
        SubMenu sub1 = (SubMenu) menu.addSubMenu(0,MENU_00,0,"设置")
                .setHeaderIcon(R.drawable.pic3);
        sub1.add(0,SUB_MENU_00_01 ,0,"打印").setIcon(R.drawable.pic0);
        
        SubMenu sub2 = (SubMenu) menu.addSubMenu(0,MENU_01,1,"新建")
                .setHeaderIcon(R.drawable.pic1);
        sub2.add(0,SUB_MENU_01_00 ,0,"邮件").setIcon(R.drawable.pic2);
        sub2.add(0,SUB_MENU_01_01 ,0,"订阅").setIcon(R.drawable.pic4);

        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        TextView label = (TextView)findViewById(R.id.label);
        
        switch (item.getItemId()) {
        case MENU_00:
            label.setText("设置，菜单ID：" + item.getItemId());
            return true;
        case MENU_01:
            label.setText("新建，菜单ID：" + item.getItemId());
            return true;
        case SUB_MENU_00_01:
            label.setText("打印，子菜单ID：" + item.getItemId());
            return true;
        case SUB_MENU_01_00:
            label.setText("邮件，子菜单ID：" + item.getItemId());
            return true;
        case SUB_MENU_01_01:
            label.setText("订阅，子菜单ID：" + item.getItemId());
            return true;
        default:
            return false;
        }
    }
}

Activity Communication

ActivityCommunication.javasql

package edu.hrbeu.ActivityCommunication;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class ActivityCommunicationActivity extends Activity {
    
    private static final int SUBACTIVITY1 = 1;
    private static final int SUBACTIVITY2 = 2;
    
    TextView textView;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        textView = (TextView)findViewById(R.id.textShow);
        final Button btn1 = (Button)findViewById(R.id.btn1);
        final Button btn2 = (Button)findViewById(R.id.btn2);
        
        btn1.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                Intent intent = new Intent(ActivityCommunicationActivity.this, SubActivity1.class);
                startActivityForResult(intent, SUBACTIVITY1);
            }
        });
        
        btn2.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                Intent intent = new Intent(ActivityCommunicationActivity.this, SubActivity2.class);
                startActivityForResult(intent, SUBACTIVITY2);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        
        switch(requestCode){
        case SUBACTIVITY1:
            if (resultCode == RESULT_OK){
                Uri uriData = data.getData();
                textView.setText(uriData.toString());
            }
            break;
        case SUBACTIVITY2:
            break;
        }
    }
}

SubActivity1.java数据库

package edu.hrbeu.ActivityCommunication;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class SubActivity1 extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.subactivity1);
        
        final EditText editText = (EditText)findViewById(R.id.edit);
        Button btnOK = (Button)findViewById(R.id.btn_ok);
        Button btnCancel = (Button)findViewById(R.id.btn_cancel);
        
        btnOK.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                String uriString = editText.getText().toString();
                Uri data = Uri.parse(uriString);
                
                Intent result = new Intent(null, data);
                
                setResult(RESULT_OK, result);
                finish();
            }
        });
        
        btnCancel.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                setResult(RESULT_CANCELED, null);
                finish();
            }
        });
    }
}

SubActivity2.javaapp

package edu.hrbeu.ActivityCommunication;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class SubActivity2 extends Activity {
     /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.subactivity2);
        
        Button btnReturn = (Button)findViewById(R.id.btn_return);
        
        btnReturn.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                setResult(RESULT_CANCELED, null);
                finish();
            }
        });
    }
}

BroadcastReceiverDemo

BroadcastReceiverDemoActivity.javadom

package edu.hrbeu.BroadcastReceiverDemo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class BroadcastReceiverDemoActivity extends Activity {
    private EditText entryText ;
    private Button button;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        entryText = (EditText)findViewById(R.id.entry);
        button = (Button)findViewById(R.id.btn);
        
        button.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                Intent intent = new Intent("HELLO");
                intent.putExtra("message", entryText.getText().toString());
                sendBroadcast(intent);
            }
        });
    }
}

MyBroadcastReceiver.javaide

package edu.hrbeu.BroadcastReceiverDemo;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class MyBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String msg = intent.getStringExtra("message");

        Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();

    }
}

Intent Demo

IntentDemoActivity.javaui

package edu.hrbeu.IntentDemo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class IntentDemoActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Button button = (Button)findViewById(R.id.btn);
        button.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                Intent intent = new Intent(IntentDemoActivity.this, NewActivity.class);
                startActivity(intent);
            }
        });       
    }
}

NewActivity.javathis

package edu.hrbeu.IntentDemo;

import android.app.Activity;
import android.os.Bundle;

public class NewActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_2);
    }
}

IntentResolutionDemo

IntentResutionDemoActivity.java编码

package edu.hrbeu.IntentResolutionDemo;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class IntentResolutionDemoActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Button button = (Button)findViewById(R.id.btn);
        button.setOnClickListener(new OnClickListener(){
            public void onClick(View view){
                Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("schemodemo://edu.hrbeu/path"));
                startActivity(intent);
            }
        });
    }
}

NewActivity.java

package edu.hrbeu.IntentResolutionDemo;

import android.app.Activity;
import android.os.Bundle;

public class NewActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_2);
    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.hrbeu.IntentResolutionDemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="14" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".IntentResolutionDemoActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <activity android:name=".NewActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:scheme="schemodemo" android:host="edu.hrbeu" />
            </intent-filter>
        </activity>
            
    </application>

</manifest>

AIDL

a.aidl

package ImplicityRandomServiceDemo;

interface a{
long add(long b1,long b2);
}

ImplicityRandomServiceDemoActivity.java

package edu.hrbeu.ImplicityRandomServiceDemo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class ImplicityRandomServiceDemoActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Button startButton = (Button)findViewById(R.id.start);
        Button stopButton = (Button)findViewById(R.id.stop);
        
        final Intent serviceIntent = new Intent();
        serviceIntent.setAction("hh1");
                                   
        
        startButton.setOnClickListener(new Button.OnClickListener(){
            public void onClick(View view){
                startService(serviceIntent);
            }
        });
        
        stopButton.setOnClickListener(new Button.OnClickListener(){
            public void onClick(View view){
                stopService(serviceIntent);
            }
        });
    }
}

RandomService.java

package edu.hrbeu.ImplicityRandomServiceDemo;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;

public class RandomService extends Service{
    
    @Override
    public void onCreate() {
        super.onCreate();
        Toast.makeText(this, "(1) 调用onCreate()", 
                Toast.LENGTH_LONG).show();    
    }
    
    @Override
    public void onStart(Intent intent, int startId) {
          super.onStart(intent, startId);
          Toast.makeText(this, "(2) 调用onStart()", 
                  Toast.LENGTH_SHORT).show();

          double randomDouble = Math.random();
          String msg = "随机数："+ String.valueOf(randomDouble);
          Toast.makeText(this,msg, Toast.LENGTH_SHORT).show();
          
    }
    
    @Override
    public void onDestroy() {
         super.onDestroy();
         Toast.makeText(this, "(3) 调用onDestroy()", 
                 Toast.LENGTH_SHORT).show();     
    }
     
    
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

AIDL: RemoteMathCallerDemoActivity

RemoteMathCallerDemoActivity.java

package edu.hrbeu.RemoteMathCallerDemo;

import edu.hrbeu.RemoteMathServiceDemo.IMathService;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class RemoteMathCallerDemoActivity extends Activity {
    private IMathService mathService;
    
    private ServiceConnection mConnection = new ServiceConnection() {                           
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            mathService = IMathService.Stub.asInterface(service);                          
        }
        @Override
        public void onServiceDisconnected(ComponentName name) {
            mathService = null; 
        } 
    }; 
    
    private boolean isBound = false;
    TextView labelView;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        labelView = (TextView)findViewById(R.id.label);
        Button bindButton = (Button)findViewById(R.id.bind);
        Button unbindButton = (Button)findViewById(R.id.unbind);
        Button computButton = (Button)findViewById(R.id.compute_add);
        
        bindButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                if(!isBound){
                    final Intent serviceIntent = new Intent();
                    serviceIntent.setAction("edu.hrbeu.RemoteMathServiceDemo.MathService");
                    bindService(serviceIntent,mConnection,Context.BIND_AUTO_CREATE);
                    isBound = true;
                }
            }   
        }); 
        
        unbindButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                if(isBound){
                    isBound = false;
                    unbindService(mConnection);
                    mathService = null;
                }
            }       
        });
        
        computButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                    if (mathService == null){
                        labelView.setText("δ��Զ�̷���");
                        return;
                    }
                    long a = Math.round(Math.random()*100);
                    long b = Math.round(Math.random()*100);
                    long result = 0;
                    try {
                        result = mathService.Add(a, b);
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }
                    String msg = String.valueOf(a)+" + "+String.valueOf(b)+
                                    " = "+String.valueOf(result);
                    labelView.setText(msg);
            }   
        });
    } 
}

IMathService.aidl

package edu.hrbeu.RemoteMathServiceDemo;  
 
interface IMathService {        
    long Add(long a, long b);           

}

xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.hrbeu.RemoteMathCallerDemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="14" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".RemoteMathCallerDemoActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

ContentProvider Demo

contentProvider.java

package edu.hrbeu.ContentProviderDemo;

import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.net.Uri;

public class PeopleProvider extends ContentProvider{
    
    private static final String DB_NAME = "people.db";
    private static final String DB_TABLE = "peopleinfo";
    private static final int DB_VERSION = 1;
    
    private SQLiteDatabase db;
    private DBOpenHelper dbOpenHelper;
    
    private static final int MULTIPLE_PEOPLE = 1;
    private static final int SINGLE_PEOPLE = 2;
    private static final UriMatcher uriMatcher;
    
    static {
         uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
         uriMatcher.addURI(People.AUTHORITY, People.PATH_MULTIPLE, MULTIPLE_PEOPLE);
         uriMatcher.addURI(People.AUTHORITY, People.PATH_SINGLE, SINGLE_PEOPLE);
    }
    
    @Override
    public String getType(Uri uri) {
        switch(uriMatcher.match(uri)){
            case MULTIPLE_PEOPLE:
                return People.MINE_TYPE_MULTIPLE;
            case SINGLE_PEOPLE:
                return People.MINE_TYPE_SINGLE;
            default:
                throw new IllegalArgumentException("Unkown uri:"+uri);
        }
    }
    
    
    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        int count = 0;
        switch(uriMatcher.match(uri)){
            case MULTIPLE_PEOPLE:
                count = db.delete(DB_TABLE, selection, selectionArgs);
                break;
            case SINGLE_PEOPLE:
                String segment = uri.getPathSegments().get(1);
                count = db.delete(DB_TABLE, People.KEY_ID + "=" + segment, selectionArgs);
                break;
            default:
                throw new IllegalArgumentException("Unsupported URI:" + uri);
        }
        getContext().getContentResolver().notifyChange(uri, null);
        return count;
    }
    

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        long id = db.insert(DB_TABLE, null, values);
        if ( id > 0 ){
            Uri newUri = ContentUris.withAppendedId(People.CONTENT_URI, id);
            getContext().getContentResolver().notifyChange(newUri, null);
            return newUri;
        }
        throw new SQLException("Failed to insert row into " + uri);
    }

    @Override
    public boolean onCreate() {
        Context context = getContext();
        dbOpenHelper = new DBOpenHelper(context, DB_NAME, null, DB_VERSION);
        db = dbOpenHelper.getWritableDatabase();

        if (db == null)
            return false;
        else 
            return true;    
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
            String[] selectionArgs, String sortOrder) {
        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
        qb.setTables(DB_TABLE);
        switch(uriMatcher.match(uri)){
            case SINGLE_PEOPLE:
                qb.appendWhere(People.KEY_ID + "=" + uri.getPathSegments().get(1));
                break;
            default:
                break;
        }
        Cursor cursor = qb.query(db, 
                projection, 
                selection, 
                selectionArgs, 
                null, 
                null, 
                sortOrder);
        cursor.setNotificationUri(getContext().getContentResolver(), uri);
        return cursor;
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        int count;
        switch(uriMatcher.match(uri)){
            case MULTIPLE_PEOPLE:
                count = db.update(DB_TABLE, values, selection, selectionArgs);
                break;
            case SINGLE_PEOPLE:
                String segment = uri.getPathSegments().get(1);
                count = db.update(DB_TABLE, values, People.KEY_ID+"="+segment, selectionArgs);
                break;
            default:
                throw new IllegalArgumentException("Unknow URI:" + uri);    
        }
        getContext().getContentResolver().notifyChange(uri, null);
        return count;
    }
    
    
      private static class DBOpenHelper extends SQLiteOpenHelper {

          public DBOpenHelper(Context context, String name, CursorFactory factory, int version) {
            super(context, name, factory, version);
          }

          private static final String DB_CREATE = "create table " + 
            DB_TABLE + " (" + People.KEY_ID + " integer primary key autoincrement, " +
            People.KEY_NAME+ " text not null, " + People.KEY_AGE+ " integer," + People.KEY_HEIGHT + " float);";

          @Override
          public void onCreate(SQLiteDatabase _db) {
            _db.execSQL(DB_CREATE);
          }

          @Override
          public void onUpgrade(SQLiteDatabase _db, int _oldVersion, int _newVersion) {         
            _db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE);
            onCreate(_db);
          }
        }    
}

People.java

package edu.hrbeu.ContentProviderDemo;

import android.net.Uri;

public class People{
    
    public static final String MIME_DIR_PREFIX = "vnd.android.cursor.dir";
    public static final String MIME_ITEM_PREFIX = "vnd.android.cursor.item";
    public static final String MINE_ITEM = "vnd.hrbeu.people";
    
    public static final String MINE_TYPE_SINGLE = MIME_ITEM_PREFIX + "/" + MINE_ITEM;
    public static final String MINE_TYPE_MULTIPLE = MIME_DIR_PREFIX + "/" + MINE_ITEM;
    
    public static final String AUTHORITY = "edu.hrbeu.peopleprovider";
    public static final String PATH_SINGLE = "people/#";
    public static final String PATH_MULTIPLE = "people";
    public static final String CONTENT_URI_STRING = "content://" + AUTHORITY + "/" + PATH_MULTIPLE;
    public static final Uri  CONTENT_URI = Uri.parse(CONTENT_URI_STRING); 
    
    public static final String KEY_ID = "_id";
    public static final String KEY_NAME = "name";
    public static final String KEY_AGE = "age";
    public static final String KEY_HEIGHT = "height";
}

ContentResolverDemo

ContentResolverDemoActivtiy.java

 

People.java同上
 

SQLite Demo
 

DBAdapter.java
 

package edu.hrbeu.SQLiteDemo;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase.CursorFactory;

public class DBAdapter {

    private static final String DB_NAME = "people.db";
    private static final String DB_TABLE = "peopleinfo";
    private static final int DB_VERSION = 1;
     
    public static final String KEY_ID = "_id";
    public static final String KEY_NAME = "name";
    public static final String KEY_AGE = "age";
    public static final String KEY_HEIGHT = "height";
    
    private SQLiteDatabase db;
    private final Context context;
    private DBOpenHelper dbOpenHelper;
    
    public DBAdapter(Context _context) {
        context = _context;
      }

      /** Close the database */
      public void close() {
          if (db != null){
              db.close();
              db = null;
          }
        }

      /** Open the database */
      public void open() throws SQLiteException {  
          dbOpenHelper = new DBOpenHelper(context, DB_NAME, null, DB_VERSION);
          try {
              db = dbOpenHelper.getWritableDatabase();
          }
          catch (SQLiteException ex) {
              db = dbOpenHelper.getReadableDatabase();
          }   
        }
      
    
      public long insert(People people) {
        ContentValues newValues = new ContentValues();
      
        newValues.put(KEY_NAME, people.Name);
        newValues.put(KEY_AGE, people.Age);
        newValues.put(KEY_HEIGHT, people.Height);
        
        return db.insert(DB_TABLE, null, newValues);
      }


      public People[] queryAllData() {  
          Cursor results =  db.query(DB_TABLE, new String[] { KEY_ID, KEY_NAME, KEY_AGE, KEY_HEIGHT}, 
                  null, null, null, null, null);
          return ConvertToPeople(results);   
      }
      
      public People[] queryOneData(long id) {  
          Cursor results =  db.query(DB_TABLE, new String[] { KEY_ID, KEY_NAME, KEY_AGE, KEY_HEIGHT}, 
                  KEY_ID + "=" + id, null, null, null, null);
          return ConvertToPeople(results);   
      }
      
      private People[] ConvertToPeople(Cursor cursor){
          int resultCounts = cursor.getCount();
          if (resultCounts == 0 || !cursor.moveToFirst()){
              return null;
          }
          People[] peoples = new People[resultCounts];
          for (int i = 0 ; i<resultCounts; i++){
              peoples[i] = new People();
              peoples[i].ID = cursor.getInt(0);
              peoples[i].Name = cursor.getString(cursor.getColumnIndex(KEY_NAME));
              peoples[i].Age = cursor.getInt(cursor.getColumnIndex(KEY_AGE));
              peoples[i].Height = cursor.getFloat(cursor.getColumnIndex(KEY_HEIGHT));
              
              cursor.moveToNext();
          }   
          return peoples; 
      }
      
      public long deleteAllData() {
          return db.delete(DB_TABLE, null, null);
      }

      public long deleteOneData(long id) {
          return db.delete(DB_TABLE,  KEY_ID + "=" + id, null);
      }

      public long updateOneData(long id , People people){
          ContentValues updateValues = new ContentValues();   
          updateValues.put(KEY_NAME, people.Name);
          updateValues.put(KEY_AGE, people.Age);
          updateValues.put(KEY_HEIGHT, people.Height);
          
          return db.update(DB_TABLE, updateValues,  KEY_ID + "=" + id, null);
      }
      
        /** 静态Helper类，用于创建、更新和打开数据库*/
      private static class DBOpenHelper extends SQLiteOpenHelper {

          public DBOpenHelper(Context context, String name, CursorFactory factory, int version) {
            super(context, name, factory, version);
          }

          private static final String DB_CREATE = "create table " + 
            DB_TABLE + " (" + KEY_ID + " integer primary key autoincrement, " +
            KEY_NAME+ " text not null, " + KEY_AGE+ " integer," + KEY_HEIGHT + " float);";

          @Override
          public void onCreate(SQLiteDatabase _db) {
            _db.execSQL(DB_CREATE);
          }

          @Override
          public void onUpgrade(SQLiteDatabase _db, int _oldVersion, int _newVersion) {         
            _db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE);
            onCreate(_db);
          }
        }
    }
 

People.java
 

package edu.hrbeu.SQLiteDemo;

public class People {
    public int ID = -1;
    public String Name;
    public int Age;
    public float Height;
    
    @Override
    public String toString(){
        String result = "";
        result += "ID：" + this.ID + "，";
        result += "姓名：" + this.Name + "，";
        result += "年龄：" + this.Age + "， ";
        result += "身高：" + this.Height + "，";
        return result;
    }
}
 

SQLiteDemoActivity.java
 

package edu.hrbeu.SQLiteDemo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class SQLiteDemoActivity extends Activity {
    /** Called when the activity is first created. */
    private DBAdapter dbAdepter ;
    
    private EditText nameText;
    private EditText ageText;
    private EditText heightText;
    private EditText idEntry;
    
    private TextView labelView;
    private TextView displayView;
    
    
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        nameText = (EditText)findViewById(R.id.name);
        ageText = (EditText)findViewById(R.id.age);
        heightText = (EditText)findViewById(R.id.height);
        idEntry = (EditText)findViewById(R.id.id_entry);
        
        labelView = (TextView)findViewById(R.id.label);
        displayView = (TextView)findViewById(R.id.display);
        
        
        
        Button addButton = (Button)findViewById(R.id.add);
        Button queryAllButton = (Button)findViewById(R.id.query_all);      
        Button clearButton = (Button)findViewById(R.id.clear);
        Button deleteAllButton = (Button)findViewById(R.id.delete_all);
        
        Button queryButton = (Button)findViewById(R.id.query);
        Button deleteButton = (Button)findViewById(R.id.delete);
        Button updateButton = (Button)findViewById(R.id.update);
        
        
        addButton.setOnClickListener(addButtonListener); 
        queryAllButton.setOnClickListener(queryAllButtonListener);     
        clearButton.setOnClickListener(clearButtonListener);
        deleteAllButton.setOnClickListener(deleteAllButtonListener);      
        
        queryButton.setOnClickListener(queryButtonListener);
        deleteButton.setOnClickListener(deleteButtonListener);
        updateButton.setOnClickListener(updateButtonListener);
        
        dbAdepter = new DBAdapter(this);
        dbAdepter.open();
    }
    
    OnClickListener addButtonListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            People people = new People();
            people.Name = nameText.getText().toString();
            people.Age = Integer.parseInt(ageText.getText().toString());
            people.Height = Float.parseFloat(heightText.getText().toString());
            long colunm = dbAdepter.insert(people);
            if (colunm == -1 ){
                labelView.setText("添加过程错误！");
            } else {
                labelView.setText("成功添加数据，ID："+String.valueOf(colunm)); 
                
            }
        }   
    };
    
    OnClickListener queryAllButtonListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            People[] peoples = dbAdepter.queryAllData();
            if (peoples == null){
                labelView.setText("数据库中没有数据");
                return;
            }
            labelView.setText("数据库：");
            String msg = "";
            for (int i = 0 ; i<peoples.length; i++){
                msg += peoples[i].toString()+"\n";
            }
            displayView.setText(msg);
        }
    };
    
    OnClickListener clearButtonListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            displayView.setText("");
        }   
    };
    
    OnClickListener deleteAllButtonListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            dbAdepter.deleteAllData();
            String msg = "数据所有删除";
            labelView.setText(msg);
        }   
    };
    
    OnClickListener queryButtonListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            int id = Integer.parseInt(idEntry.getText().toString());
            People[] peoples = dbAdepter.queryOneData(id);
            
            if (peoples == null){
                labelView.setText("数据库中没有ID为"+String.valueOf(id)+"的数据");
                return;
            }
            labelView.setText("数据库：");
            displayView.setText(peoples[0].toString());
        }
    };
    
    OnClickListener deleteButtonListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            long id = Integer.parseInt(idEntry.getText().toString());
            long result = dbAdepter.deleteOneData(id);
            String msg = "删除ID为"+idEntry.getText().toString()+"的数据" + (result>0?"成功":"失败");
            labelView.setText(msg);
        }   
    };
    
    OnClickListener updateButtonListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            People people = new People();
            people.Name = nameText.getText().toString();
            people.Age = Integer.parseInt(ageText.getText().toString());
            people.Height = Float.parseFloat(heightText.getText().toString());
            long id = Integer.parseInt(idEntry.getText().toString());
            long count = dbAdepter.updateOneData(id, people);
            if (count == -1 ){
                labelView.setText("更新错误！");
            } else {
                labelView.setText("更新成功，更新数据"+String.valueOf(count)+"条");   
                
            }
        }
    };

}

                




                

            

        

    










    

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