android发送键盘事件（应用层）

package org.winplus.keydemo;

import android.app.Activity;
import android.app.Instrumentation;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;

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();
}
}