【Android应用开发】-（20）简略的模拟按键发送消息

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

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);			}		});    }    	/**	 * 传入需要的键值即可	 * @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();	}　　}　　

加入权限：

<uses-permission android:name="android.permission.INJECT_EVENTS" />