I'm trying to setup a service that detect when screen goes off and disable the wifi.
Here is my code:
Service:
public static boolean isScreen;
private int mInterval = 5000;
private Handler mHandler;
@Override
public void onCreate() {
mHandler = new Handler();
startRepeatingTask();
IntentFilter mFilter = new IntentFilter("com.my.package.myAction");
BroadcastReceiver mReceiver = new screenReceiver();
registerReceiver(mReceiver, mFilter);
}
Runnable mStatusChecker = new Runnable() {
@Override
public void run() {
Intent intent = new Intent();
intent.setAction("com.my.package.myAction");
sendBroadcast(intent);
PowerManager pm = (PowerManager) androidTweaker.this.getSystemService(Context.POWER_SERVICE);
isScreen = pm.isScreenOn();
mHandler.postDelayed(mStatusChecker, mInterval);
}
};
void startRepeatingTask() {
mStatusChecker.run();
}
void stopRepeatingTask() {
mHandler.removeCallbacks(mStatusChecker);
}
And here is my first question: I set up an handler to check every 5 seconds the state of the screen. Have you got any better solution?
My receiver:
public class screenReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);
NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (!myService.isScreen && !mWifi.isConnected()) {
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(false);
}
}
}
And here my service crash. The logcat report the error in this line: wifiManager.setWifiEnabled(false); (Receiver)
My manifest:
<service android:name=".myService"/>
<receiver android:name=".screenReceiver">
<intent-filter>
<action android:name="com.my.package.myAction"/>
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<user-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<user-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
My service of course got a notification with foreground, so it's always on. Any help?
Edit: I got the main problem (changing wifi state) solved by replace
<user-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<user-permission android:name="android.permission.CHANGE_WIFI_STATE" />
with
<use**s**-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<use**s**-permission android:name="android.permission.CHANGE_WIFI_STATE" />
Any way to let the service detect screen off without handler?
EDIT2: Problem 1 also solved:
Service:
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction("com.my.package.myAction");
BroadcastReceiver mReceiver = new screenReceiver();
registerReceiver(mReceiver, filter);
Receiver:
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(false);
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(true);
}
Intent i = new Intent(context, androidTweaker.class);
context.startService(i);
}
To get the on/off state of the screen, use the ACTION_SCREEN_ON and ACTION_SCREEN_OFF intents.