Android:Wake&解锁手机

时间:2011-11-10 00:27:49

标签: android broadcastreceiver android-wake-lock

我正在试图找出如何使用服务唤醒和解锁手机。我一直指的是this帖子,但我无法弄清楚它为什么不起作用。这是我到目前为止的代码:

public class WakephoneActivity extends Activity {

    BroadcastReceiver mReceiver;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mReceiver = new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {
                // Log.v(TAG, "Screen OFF onReceive()");
                screenOFFHandler.sendEmptyMessageDelayed(0, 2000);
            }
        };
    }

    private Handler screenOFFHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            // do something
            // wake up phone
            // Log.i(TAG, "ake up the phone and disable keyguard");
            PowerManager powerManager = (PowerManager) WakephoneActivity.this
                    .getSystemService(Context.POWER_SERVICE);
            long l = SystemClock.uptimeMillis();
            powerManager.userActivity(l, false);// false will bring the screen
            // back as bright as it was, true - will dim it
        }
    };

    protected void onResume() {
        super.onResume();
        IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
        registerReceiver(mReceiver, filter);
        // Log.i(TAG, "broadcast receiver registered!");
    }
}

我也在清单中添加了代码。有什么想法吗?

3 个答案:

答案 0 :(得分:14)

在您的服务中使用以下代码。

PowerManager pm = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
        mWakeLock = pm.newWakeLock((PowerManager.SCREEN_DIM_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP), "YourServie");
        mWakeLock.acquire();
        [...]
        mWakeLock.release();

如果您想解锁屏幕,请在您的服务中注册接收器,监控屏幕是否开启/关闭以及是否已关闭并且您想要解锁手机,请使用此代码启动活动onCreate

Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
this.finish();
return;

我知道,这是一个相当脏的,但据我所知,没有其他方法可以解锁锁屏(这只有在没有设置密码等情况下才有效,所以一定是正常的“幻灯片”解锁“屏幕”。

不要忘记添加android.permission.WAKE_LOCK; - )

/ edit:我刚看到你已经在使用Activity了。如果您有一个并且根本不需要该服务,只需将此代码放入活动中即可。

答案 1 :(得分:1)

要使服务始终处于活动状态,您需要在清单上拥有此权限:

<uses-permission android:name="android.permission.WAKE_LOCK" />

您需要做的另一件事是获取WakeLock。没有它,服务将在一段时间后结束。你可以这样做:

getApplicationContext();
PowerManager pm = (PowerManager)getApplicationContext().getSystemService(Context.POWER_SERVICE);
WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
wl.acquire();

您可能需要将PowerManager.PARTIAL_WAKE_LOCK更改为您需要的那个。您可以看到有关here的信息。

答案 2 :(得分:1)

WakefulBroadcastReceiver为您执行此操作。使用示例:

import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;
import android.support.v4.content.WakefulBroadcastReceiver;
import android.util.Log;

public class SimpleWakefulReceiver extends WakefulBroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // This is the Intent to deliver to our service.
        Intent service = new Intent(context, SimpleWakefulService.class);

        // Start the service, keeping the device awake while it is launching.
        Log.i("SimpleWakefulReceiver", "Starting service @ " + SystemClock.elapsedRealtime());
        startWakefulService(context, service);
    }
}

完成服务中的操作后,请致电SimpleWakefulReceiver.completeWakefulIntent(intent)以解除唤醒锁定。

(因为@Force已经提供了关于wakeLock的详细信息,不需要在这里重复; - )

请注意,该类已从api级别26.1.0,参考here

弃用