按电源按钮启动应用程序

我找到了这个code按电源按钮启动应用程序。

我不知道为什么这个代码对我不起作用，但无论如何我正在将一些代码与清单一起放置，请检查...

然后告诉我通过按一次或两次电源按钮启动应用程序的代码是否正确？

   toast = Toast.makeText(getApplicationContext(), "", Toast.LENGTH_SHORT);

    btnToggleLock.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                if (btnToggleLock.isChecked()) {    

                    toast.cancel();
                    toast.setText("Unlocked");
                    toast.show();

                    Log.i("Unlocked", "If");

                    Context context = getApplicationContext();
                    KeyguardManager _guard = (KeyguardManager) context
                            .getSystemService(Context.KEYGUARD_SERVICE);
                    KeyguardLock _keyguardLock = _guard
                            .newKeyguardLock("KeyguardLockWrapper");
                    _keyguardLock.disableKeyguard();

                    PanicButtonActivity.this.startService(new Intent(
                            PanicButtonActivity.this, UpdateService.class));

                } else {

                    toast.cancel();
                    toast.setText("Locked");
                    toast.show();

                    Context context = getApplicationContext();
                    KeyguardManager _guard = (KeyguardManager) context
                            .getSystemService(Context.KEYGUARD_SERVICE);
                    KeyguardLock _keyguardLock = _guard
                            .newKeyguardLock("KeyguardLockWrapper");
                    _keyguardLock.reenableKeyguard();

                    Log.i("Locked", "else");

                    PanicButtonActivity.this.stopService(new Intent(PanicButtonActivity.this,
                            UpdateService.class));

                }

            }
        });

接收器.java：

public class Receiver extends BroadcastReceiver {

    private boolean screenOff;

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            screenOff = true;
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            screenOff = false;
        }
        Intent i = new Intent(context, UpdateService.class);
        i.putExtra("screen_state", screenOff);
        context.startService(i);
    }

}

Service:

public class UpdateService extends Service {

    BroadcastReceiver mReceiver;

@Override
public void onCreate() {
    super.onCreate();
    // register receiver that handles screen on and screen off logic
    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
    filter.addAction(Intent.ACTION_SCREEN_OFF);
    mReceiver = new Receiver();
    registerReceiver(mReceiver, filter);
}

@Override
public void onDestroy() {

    unregisterReceiver(mReceiver);
    Log.i("onDestroy Reciever", "Called");

    super.onDestroy();
}

@Override
public void onStart(Intent intent, int startId) {
    boolean screenOn = intent.getBooleanExtra("screen_state", false);
    if (!screenOn) {
        Log.i("screenON", "Called");
        Toast.makeText(getApplicationContext(), "Awake", Toast.LENGTH_LONG)
                .show();
    } else {
        Log.i("screenOFF", "Called");
    }
}

@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}
}

Manifest.xml：-

 <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

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

   <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.panic.app.PanicButtonActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <receiver android:name="com.panic.app.Receiver" />
    <service android:name="com.panic.app.UpdateService" />

</application>

首先，与其他广泛传播的意图不同，您需要创建一个将继续运行的服务，如下所示：

public static class UpdateService extends Service {

        @Override
        public void onCreate() {
            super.onCreate();
            // register receiver that handles screen on and screen off logic
            IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
            filter.addAction(Intent.ACTION_SCREEN_OFF);
            BroadcastReceiver mReceiver = new Receiver();
            registerReceiver(mReceiver, filter);
        }

        @Override
        public void onStart(Intent intent, int startId) {
            boolean screenOn = intent.getBooleanExtra("screen_state", false);
            if (!screenOn) {
                // your code
            } else {
                // your code
            }
        }
}

你的接收器可以是某种东西

public class Receiver extends BroadcastReceiver {

    private boolean screenOff;

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            screenOff = true;
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            screenOff = false;
        }
        Intent i = new Intent(context, UpdateService.class);
        i.putExtra("screen_state", screenOff);
        context.startService(i);
    }

}