Android锁屏与解锁广播状态监听

Android锁屏与解锁广播监听

在Android开发中经常会碰到锁屏和解锁的需求，这里封装一个ScreenListener统一管理广播的注册和反注册，同时设置锁屏和解锁的回调监听。

代码如下：

public class ScreenListener {
private Context mContext;
private ScreenBroadcastReceiver receiver;
private ScreenStateListener mScreenStateListener;

public ScreenListener(Context context) {
mContext = context;
receiver = new ScreenBroadcastReceiver();
}

public void register(ScreenStateListener screenStateListener) {
if (screenStateListener != null) {
mScreenStateListener = screenStateListener;
}
if (receiver != null) {
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_USER_PRESENT);
mContext.registerReceiver(receiver, filter);
}
}

public void unregister() {
if (receiver != null) {
mContext.unregisterReceiver(receiver);
}
}

private class ScreenBroadcastReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
if (intent != null) {
String action = intent.getAction();
if (Intent.ACTION_SCREEN_ON.equals(action)) {
if (mScreenStateListener != null) {
Log.e("zhang", "ScreenBroadcastReceiver --> ACTION_SCREEN_ON");
mScreenStateListener.onScreenOn();
}
} else if (Intent.ACTION_SCREEN_OFF.equals(action)) {
if (mScreenStateListener != null) {
Log.e("zhang", "ScreenBroadcastReceiver --> ACTION_SCREEN_OFF");
mScreenStateListener.onScreenOff();
}
} else if (Intent.ACTION_USER_PRESENT.equals(action)) {
if (mScreenStateListener != null) {
Log.e("zhang", "ScreenBroadcastReceiver --> ACTION_USER_PRESENT");
mScreenStateListener.onUserPresent();
}
}
}
}
}

public interface ScreenStateListener {
void onScreenOn();

void onScreenOff();

void onUserPresent();
}
}

如果有需要，可以采用单例的写法

MainActivity中的调用

public class MainActivity extends AppCompatActivity {

private ScreenListener listener;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listener = new ScreenListener(this);
listener.register(new ScreenListener.ScreenStateListener() {
@Override
public void onScreenOn() {
Log.e("zhang", "MainActivity --> onScreenOn--> ");
}

@Override
public void onScreenOff() {
Log.e("zhang", "MainActivity --> onScreenOff--> ");
}

@Override
public void onUserPresent() {
Log.e("zhang", "MainActivity --> onUserPresent--> ");
}
});
}

@Override
protected void onDestroy() {
if (listener != null) {
listener.unregister();
}
super.onDestroy();
}
}

打印的log结果:

zhang: ScreenBroadcastReceiver --> ACTION_SCREEN_OFF
zhang: MainActivity --> onScreenOff-->
zhang: ScreenBroadcastReceiver --> ACTION_SCREEN_ON
zhang: MainActivity --> onScreenOn-->
zhang: ScreenBroadcastReceiver --> ACTION_USER_PRESENT
zhang: MainActivity --> onUserPresent-->