百度地图开发之二】基于Fragment的地图框架的使用

时间 2019-12-24

标签百度地图开发之二基于 fragment 框架使用繁體版

原文原文链接

写在前面的话: 【百度地图开发之二】基于Fragment的地图框架的使用(博客地址:http://blog.csdn.net/developer_jiangqq),转载请注明。html

Author:hmjiangqq

 Email:jiangqqlmj@163.com

上一篇咱们学习了百度地图最基础的内容(申请Key和配置初览显示地图),今天继续来看一下基于Fragment的地图框架的使用。java

(一)基本介绍(Fragment和SupportMapFragment): Fragment的使用如今安卓APP开发中用的比较多了，Fragment名称为碎片和Activity有着类似的生命管理周期，基本做用能够进行开发兼容手机和平板的app,较少兼容分辨率版本的工做量，提升工做效率。其中Fragment仍是能够包含控制代码的视图模块，能够很是方便的进行组合。使用起来很方便。具体有个Fragment的介绍和使用请点击查看(官网Fragment的介绍和基本使用)，这边就很少讲了。下面咱们来看下百度地图API给咱们提供的地图框架SupportMapFragment。SupportMapFragment是继承于Fragment所以具有Fragment的完成的生命周期,该框架主要用来管理地图生命周期,主要有下面两个方法1:getMapView()：获取MapView引用，要在onCreateView函数调用以后进行使用.2:newInstance();返回获取SupportMapFragment对象实例。android

(二)使用方法: 使用方法和咱们平时用Fragment的时候差很少,首先获取SupportMapFragment实例，而后把该Fragment添加到指定View视图图.commit一下便可.api

(三)代码演示，注释基本已经写了挺详细了，直接看就OK了 1.自定义MyApplication.java设置全局变量,而且进行校验密钥:网络

[java] view plain copy package com.ztt.baidumap.ui;app

import android.app.Application;
import android.content.Context;
import android.util.Log;
import android.widget.Toast;框架

import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.MKGeneralListener;
import com.baidu.mapapi.map.MKEvent;
/**ide

自定义Application,进行key识别验证（使用单例）函数
@author Jiangqq布局

@time 2014/03/15 10:14 */
public class MyApplication extends Application {
public static MyApplication instance=null;
BMapManager mBMapManager = null;
public boolean m_bKeyRight = true;
public static final String strKey = "vUAGbPwLpolIqiwWisnQPeIE"; //百度地图官网申请的密钥
public static MyApplication getInstance(){
return instance;
}
@Override
public void onCreate() {
super.onCreate();
instance=this;
//在APP应用启动的时候，进行初始化验证
initEngineManager(this);
}

/**

进行验证key

@param pContext */
private void initEngineManager(Context pContext)
{
if (mBMapManager == null) {
mBMapManager = new BMapManager(pContext);
}

if (!mBMapManager.init(strKey,new MyGeneralListener())) {  
     Toast.makeText(MyApplication.getInstance(),   
             "BMapManager  初始化错误!", Toast.LENGTH_LONG).show();  
 }

}
// 经常使用事件监听，用来处理一般的网络错误，受权验证错误等
static class MyGeneralListener implements MKGeneralListener {

@Override  
 public void onGetNetworkState(int iError) {  
     if (iError == MKEvent.ERROR_NETWORK_CONNECT) {  
         Toast.makeText(MyApplication.getInstance(), "您的网络出错啦！",  
             Toast.LENGTH_LONG).show();  
     }  
     else if (iError == MKEvent.ERROR_NETWORK_DATA) {  
         Toast.makeText(MyApplication.getInstance(), "输入正确的检索条件！",  
                 Toast.LENGTH_LONG).show();  
     }else {  
          Log.d("zttjiangqq", "iError="+iError);  
     }  
     // ...  
 }  

 @Override  
 public void onGetPermissionState(int iError) {  
     //非零值表示key验证未经过  
     if (iError != 0) {  
         //受权Key错误：  
         Toast.makeText(MyApplication.getInstance(),   
                 "请在 DemoApplication.java文件输入正确的受权Key,并检查您的网络链接是否正常！error: "+iError, Toast.LENGTH_LONG).show();  
         MyApplication.getInstance().m_bKeyRight = false;  
     }  
     else{  
         MyApplication.getInstance().m_bKeyRight = true;  
         Toast.makeText(MyApplication.getInstance(),   
                 "key认证成功", Toast.LENGTH_LONG).show();  
     }  
 }

}
}

2:建立一个FragmentMapDemo.java,继承于FragmentActivity，使用newInstance()方法获取SupportMapFragment,进行显示地图:

[java] view plain copy package com.ztt.baidumap.ui;

import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.util.Log;

import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.map.MapController;
import com.baidu.mapapi.map.SupportMapFragment;
import com.baidu.platform.comapi.basestruct.GeoPoint;

public class FragmentMapDemo extends FragmentActivity {
SupportMapFragment map;
@Override
public void onCreate(Bundle arg0) {
/** * 使用地图sdk前需先初始化BMapManager. * BMapManager是全局的，可为多个MapView共用，它须要地图模块建立前建立， * 并在地图地图模块销毁后销毁，只要还有地图模块在使用，BMapManager就不该该销毁 /
MyApplication app = (MyApplication)this.getApplication();
if (app.mBMapManager == null) {
app.mBMapManager = new BMapManager(getApplicationContext());
/* * 若是BMapManager没有初始化则初始化BMapManager */
app.mBMapManager.init(MyApplication.strKey,new MyApplication.MyGeneralListener());
}
Log.d("zttjiangqq", "onCreate");
setContentView(R.layout.activity_fragment);
map = SupportMapFragment.newInstance();
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft= manager.beginTransaction();
ft.add(R.id.map, map, "map_fragment");
ft.commit();
}

@Override  
protected void onRestoreInstanceState(Bundle savedInstanceState) {  
    super.onRestoreInstanceState(savedInstanceState);  
    Log.d("zttjiangqq", "onRestoreInstanceState");  
}  

@Override  
protected void onRestart() {  
    super.onRestart();  
    Log.d("zttjiangqq", "onRestart");  
}  

@Override  
public void onStart() {  
    super.onStart();  
    Log.d("zttjiangqq", "onStart");  
}  

@Override  
public void onResume() {  
    super.onResume();  
    Log.d("zttjiangqq", "onResume");  
    // 获得MapView的控制权,能够用它控制和驱动平移和缩放    
    MapController controller = map.getMapView().getController();  
    // 用给定的经纬度构造一个GeoPoint，单位是微度 (度 * 1E6)  而且设置设置地图中心点   (这边使用天安门)  
    controller.setCenter(new GeoPoint((int)(39.945 * 1E6), (int)(116.404 * 1E6)));  
    // 设置地图zoom级别    
    controller.setZoom(13);  
}  

@Override  
public void onSaveInstanceState(Bundle outState) {  
    super.onSaveInstanceState(outState);  
    Log.d("zttjiangqq", "onSaveInstanceState");  
}  

@Override  
public void onPause() {  
    super.onPause();  
    Log.d("zttjiangqq", "onPause");  
}  

@Override  
public void onStop() {  
    super.onStop();  
    Log.d("zttjiangqq", "onStop");  
}  

@Override  
public void onDestroy() {  
    super.onDestroy();  
    Log.d("zttjiangqq", "onDestory");  
}  

@Override  
public void onConfigurationChanged(Configuration newConfig) {  
    super.onConfigurationChanged(newConfig);  
    Log.d("zttjiangqq", "onConfigurationChanged");  
}

}
3:布局文件:

[html] view plain copy

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout  
    android:id="@+id/map"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent" />

</LinearLayout>

(三)注意必定要添加配置权限

[html] view plain copy <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /> <uses-permission android:name="android.permission.BAIDU_LOCATION_SERVICE" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCES_MOCK_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" /> <uses-permission android:name="android.permission.WAKE_LOCK" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.ACCESS_GPS" />  <uses-permission android:name="android.permission.GET_TASKS" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.BROADCAST_STICKY" /> <uses-permission android:name="android.permission.WRITE_SETTINGS" />  <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" /> <uses-permission android:name="android.permission.RECORD_AUDIO" />