Android 检测实体按键事件并屏蔽

╰半夏微凉° 2023-06-30 02:45 99阅读 0赞

# Android 检测实体按键事件并屏蔽 #

**效果图：**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RyYWN5ZHJhZ29ubHh5_size_16_color_FFFFFF_t_70]

1.  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;
            }
        }
    
    }

1.  注册服务类，AndroidManifest.xml文件。

1.  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。

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RyYWN5ZHJhZ29ubHh5_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200114170534981.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RyYWN5ZHJhZ29ubHh5,size_16,color_FFFFFF,t_70