broadcastreceiver

问题 How do I use broadcast receiver to check if there isn't Internet connection? And after that: 1.If there is connection = do nothing 2.There isn't connection = open new activity I hope you understand what I'm asking about. Here is my webview app code: WebView mWebView; String URL = "http://url.com"; ProgressBar loadingProgressBar,loadingTitle; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

问题 I have an app that receives from the Broadcastreceiver to fetch new data from the web(json), when my app is running while it fetches; everything runs well, when the app is closed it crashes "Your app stopped working". Even the following good to check if my app is in the foreground doesn't work. i want it so if the app is closed, not running, to call an intent to open the app for it not to crash, so how do I check if application is closed? My code; public class UpdateReceiver extends

问题 I'm trying to catch NFC tag in broadcast receiver so I wrote a simple BR that prints "asd" in the onReceive(). In the manifest xml it's desribed like that: and I receive only this and no print at all.... 01-31 16:37:18.980: ERROR/MediaPlayer(990): setAudioStream called in state 8 01-31 16:37:18.980: ERROR/MediaPlayer(990): error (-38, 0) 01-31 16:37:18.980: ERROR/MediaPlayer(990): start called in state 0 01-31 16:37:18.980: ERROR/MediaPlayer(990): error (-38, 0) 01-31 16:37:18.988: ERROR

问题 I can't find the Application's object (extend Application) life cycle. For example, what happens if I have a broadcast receiver which is called through Alarm. Will methods in Application being called? Or is everything independent from the Application? If I have a datahelper instantiated in the Application and I call it from broadcast receiver, will it available? Which is the Application object life cycle, when it is destroyed? when is it called when using Alarms? What happens when the

问题 I create a proximity alert in this way private void setProximityAlert(float radius, double lat, double lng, String place) { long expiration = -1; LocationManager locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Intent intent = new Intent(TREASURE_PROXIMITY_ALERT); intent.putExtra("lat", lat); intent.putExtra("lng", lng); intent.putExtra("place", place); PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), -1, intent, 0); locManager

问题 In my application, I want to do something when the battery is low. When battery is low android fires ACTION_BATTERY_LOW and when the battery again reaches to its good health it fires intent ACTION_BATTERY_OKAY . So, I have three questions regarding this: 1.At what battery percentage android actually fires ACTION_BATTERY_LOW ? 2.Does it fire that same event repeatedly if the battery gets even lower? 3.Can we configure the battery percentage at which android will fire ACTION_BATTERY_LOW intent?

问题 07-22 04:38:07.933 1579 3338 E JavaBinder: !!! FAILED BINDER TRANSACTION !!! (parcel size = 352) 07-22 04:38:07.933 1579 3338 W BroadcastQueue: Can't deliver broadcast to com.android.systemui (pid 2160). Crashing it. 07-22 04:38:07.934 1579 3338 W BroadcastQueue: Failure sending broadcast Intent { act=android.intent.action.TIME_TICK flg=0x50000014 (has extras) } 07-22 04:38:07.934 1579 3338 W BroadcastQueue: android.os.DeadObjectException: Transaction failed on small parcel; remote process

问题 07-22 04:38:07.933 1579 3338 E JavaBinder: !!! FAILED BINDER TRANSACTION !!! (parcel size = 352) 07-22 04:38:07.933 1579 3338 W BroadcastQueue: Can't deliver broadcast to com.android.systemui (pid 2160). Crashing it. 07-22 04:38:07.934 1579 3338 W BroadcastQueue: Failure sending broadcast Intent { act=android.intent.action.TIME_TICK flg=0x50000014 (has extras) } 07-22 04:38:07.934 1579 3338 W BroadcastQueue: android.os.DeadObjectException: Transaction failed on small parcel; remote process

问题 What is the integer value the gives a broadcast receiver the highest priority? <intent-filter android:priority="1"> <action android:name="android.provider.Telephony.SMS_RECEIVED" /> </intent-filter> 回答1: Well, according to the documentation "The value must be an integer, such as "100". Higher numbers have a higher priority." So I'm guessing that any integer value is valid. And the highest priority possible would be the maximum integer that android allows, which is (2^31 - 1). EDIT The

问题 I am trying to send a Broadcast from a service out to an Activity. I can verify the broadcast is sent from within the service, but the Activity doesn't pick up anything. Here is the relevant service code: Intent i = new Intent(NEW_MESSAGE); i.putExtra(FriendInfo.USERNAME, StringUtils.parseBareAddress(message.getFrom())); i.putExtra(FriendInfo.MESSAGE, message.getBody()); i.putExtra("who", "1"); sendBroadcast(i); And the receiving end in the activity class: public class newMessage extends