模拟按键发送消息

前段时间作了一个PSTN通话的应用程序，PAD链接座机实现通话功能。座机上有上翻、下翻通信录的功能。通信录用的是Google默认的。在不改动通信录的状况下只有使用模拟按键来发送消息。代码很简单，共享下!!

 <span style="font-size:18px;">public class MenuDemoActivity extends Activity {
     protected static final String TAG = "MenuDemoActivity";

     @Override
     public void onCreate(Bundle savedInstanceState) {
         requestWindowFeature(Window.FEATURE_NO_TITLE);
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         final Button button = (Button) findViewById(R.id.button1);
         button.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 sendKeyCode(KeyEvent.KEYCODE_DPAD_DOWN);
             }
         });

         final Button button2 = (Button) findViewById(R.id.button2);
         button2.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 sendKeyCode(KeyEvent.KEYCODE_DPAD_DOWN);
             }
         });
     }

     /**
      * 传入须要的键值便可
      * @param keyCode
      */
     private void sendKeyCode(final int keyCode){
         new Thread () {
             public void run() {
                 try {
                     Instrumentation inst = new Instrumentation();
                     inst.sendKeyDownUpSync(keyCode);
                 } catch (Exception e) {
                     Log.e("Exception when sendPointerSync", e.toString());
                 }
             }
         }.start();
     }
 　　}
 　　</span>

加入权限：

 <span style="font-size:18px;"><uses-permission android:name="android.permission.INJECT_EVENTS" /></span>