Android 判断手机是不是黑屏_android判断屏幕是否黑屏-优快云博客

本文链接：https://blog.youkuaiyun.com/ytyt5200/article/details/119668384

这篇博客介绍了如何在Android应用中通过BroadcastReceiver监听屏幕的状态变化，包括ACTION_SCREEN_OFF、ACTION_SCREEN_ON和ACTION_USER_PRESENT这三个关键事件。通过注册和注销接收器，可以实时获取到用户解锁屏幕的信息。

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Android没有提供专门的API来检测当前手机是否锁屏了。但是，在监听机制中，Android有3个广播与锁屏相关。

代码如下：

public class MainActivity extends AppCompatActivity {
    public static final String TAG = "SCREEN";
 
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        registerReceiver(mBroadcastReceiver, new IntentFilter(Intent.ACTION_SCREEN_OFF));
        registerReceiver(mBroadcastReceiver, new IntentFilter(Intent.ACTION_SCREEN_ON));
        registerReceiver(mBroadcastReceiver, new IntentFilter(Intent.ACTION_USER_PRESENT));
    }
 
    @Override
    protected void onDestroy() {
        unregisterReceiver(mBroadcastReceiver);
        super.onDestroy();
    }
 
    private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (!TextUtils.isEmpty(action)) {
                switch (action) {
                    case Intent.ACTION_SCREEN_OFF:
                        Log.i(TAG, "屏幕关闭，变黑");
                        break;
                    case Intent.ACTION_SCREEN_ON:
                        Log.i(TAG, "屏幕开启，变亮");
                        break;
                    case Intent.ACTION_USER_PRESENT:
                        Log.(TAG, "解锁成功");
                        break;
                    default:
                        break;
                }
            }
        }
    };
 
}