Android实现检测实体按键事件并屏蔽
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本文实例为大家分享了Android实现检测实体按键事件并屏蔽的具体代码，供大家参考，具体内容如下
效果图：
新建服务类MyKeyEventService.java。用于监听电源键的触发。
public class MyKeyEventService extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);
final BroadcastReceiver mReceiver = new MainActivity.ScreenReceiver();
registerReceiver(mReceiver, filter);
return super.onStartCommand(intent, flags, startId);
}
public class LocalBinder extends Binder {
MyKeyEventService getService() {
return MyKeyEventService.this;
}
}
}注册服务类，AndroidManifest.xml文件。
<service android:name=".MyKeyEventService">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</service>主界面MainActivity.java。
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MyKeyEvent";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startService(new Intent(this, LockService.class));
}
@Override
protected void onDestroy() {
super.onDestroy();
stopService(new Intent(MainActivity.this, LockService.class));
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_VOLUME_UP:
Log.i(TAG, "onKeyDown: vol+ down");
return true;
// break;
case KeyEvent.KEYCODE_VOLUME_DOWN:
Log.i(TAG, "onKeyDown: vol- down");
return true;
// break;
case KeyEvent.KEYCODE_POWER:
Log.i(TAG, "onKeyDown: power down");
return true;
// break;
default:
break;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_VOLUME_UP:
Log.i(TAG, "onKeyDown: vol+ up");
return true;
// break;
case KeyEvent.KEYCODE_VOLUME_DOWN:
Log.i(TAG, "onKeyDown: vol- up");
return true;
// break;
case KeyEvent.KEYCODE_POWER:
Log.i(TAG, "onKeyDown: power up");
return true;
// break;
default:
break;
}
return super.onKeyUp(keyCode, event);
}
static class ScreenReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, final Intent intent) {
// Log.e(TAG, "onReceive " + intent.getAction());
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
// do whatever you need to do here
Log.e(TAG, "Screen Off");
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
// and do whatever you need to do here
Log.e(TAG, "Screen On");
}
}
}
}如果不想屏蔽系统按键事件，则把**return true;**加上注释。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
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