I am making a app for a android phone development company. I need to run the app in the background there should not be any user interaction like google play service. So I made a application and placed it in the "system/app" so that user can't uninstall the app but I need to open the application to run the service in the background how can I skip that.
Look here: Android BroadcastReceiver on startup - keep running when Activity is in Background
Once you have broadcast receiver that is being called when system boots, you should start sticky service. Look here: START_STICKY and START_NOT_STICKY
That way your application will be started on system each system boot.
I think you should register for some BroadcastReceivers, so it will start yous app. You can use for example the boot_completed action so like this:
public class Autostart extends BroadcastReceiver
{
public void onReceive(Context arg0, Intent arg1)
{
Log.i("Autostart", "**********started************");
}
}
and the manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pack.saltriver" android:versionCode="1" android:versionName="1.0"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<application android:icon="#drawable/icon" android:label="#string/app_name">
<receiver android:name=".Autostart">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
</manifest>
but you can use a different type, you just need to modify the name of the intent . Here is the list of all BroadcastReceiver Intent.
There are many intent filter you can use fro ex- boot completed or Power plugged.
In both cases you can use broadcast receiver to to launch the active.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pack.saltriver" android:versionCode="1" android:versionName="1.0"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<application android:icon="#drawable/icon" android:label="#string/app_name">
<receiver android:name=".tart">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
Related
I have been developing a simple application without UI using broadcast receiver.
The app doesn't contain any ACTIVITIES.
I have given necessary permissions.
I took the code from this url:http://developerandro.blogspot.in/2013/09/check-internet-connection-using.html
The app shows a toast "Not connected to internet" when I click change wifi state. It's working correctly.
But my question is There is an activity registered in my manifest file which I don't have. So I delete those lines from my manifest. Then no toasts are shown and I checked the logs too. No output on changing wifi state.
Why this happened? Please help me guys...
Here is the manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.broadcast_internetcheck"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.broadcast_internetcheck.MainActivity"
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.example.broadcast_internetcheck.NetworkChangeReceiver"
android:label="NetworkChangeReceiver" >
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
<action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
</intent-filter>
</receiver>
</application>
</manifest>
Here is my Broadcastreceiver class:
public class NetworkChangeReceiver extends BroadcastReceiver{
#Override
public void onReceive(final Context context, final Intent intent) {
String status = NetworkUtil.getConnectivityStatusString(context);
/*Above line will return the status of wifi */
Toast.makeText(context, status, Toast.LENGTH_LONG).show();
}
}
You will need to create a dummy activity for a Service which will be triggered in the onCreate() of the dummy, maybe a non-UI with finish() .
Without that the required implementation is not possible, esp above Android 3.1.
http://developer.android.com/about/versions/android-3.1.html#launchcontrols
Run only a background service when application start
Start android application without activity
http://commonsware.com/blog/2011/07/13/boot-completed-regression-confirmed.html
And for more on Service:
http://developer.android.com/guide/components/services.html
https://developer.android.com/training/run-background-service/create-service.html
http://www.vogella.com/tutorials/AndroidServices/article.html
You can use service instead. But showing Toast through service bit complicated instead you can show notification through service for No Internet Connection.
If you don't want any activity check this answer. Actually you would have to create service for this: link
Create a transparent activity. Launch the toast while the activity is active and immediately finish the activity.
I have a broadcast receiver for incoming call.I want to launch a new activity when an incoming call comes.I am aware of the changes that are made from android 3.0,that the broadcast receiver will not work unless user manually starts an application
For that purpose I launch a dummy activity with just a toast message in it.Still the broadcast receiver is not working.
Here is my code
My broadcastreceiver
public class IncomingCallResult extends BroadcastReceiver
{
String TAG="IncomingCallResult";
#Override
public void onReceive(Context arg0, Intent I1)
{
Log.i(TAG,"inside on receive........");
Bundle bundle=I1.getExtras();
String state=bundle.getString(TelephonyManager.EXTRA_STATE);
if(state.equals(TelephonyManager.EXTRA_STATE_RINGING))
{
Intent flash_intent=new Intent(arg0,LedFlasher.class);
flash_intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
arg0.startActivity(flash_intent);
}
}
}
manifest file
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.blinker"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.FLASHLIGHT"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<receiver
android:name=".IncomingCallResult"
android:enabled="true">
<intent-filter
android:priority="214783648"
android:name="android.intent.action.PHONE_STATE">
</intent-filter>
</receiver>
<activity
android:name=".LedFlasher"
android:label="#string/title_activity_incoming_call_result" >
</activity>
<activity
android:name=".Dummy">
<intent-filter >
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
What is wrong with the code?
Please help
As you have already known that the broadcast receiver will not work unless user manually starts an application For that purpose, you should not be surprised that your broadcast receiver will not work until user Manually open your application once. That is to say, you have to make a launcher activity which user is able to click and open it manually.
And what's more, it is better to Open and stay in your application for like 20s since I remember that the change of application configuration will take 10 or 20s to be saved.
I am trying to create an application in Android that is composed of only 1 broadcastreceiver (and nothing else).
The broadcastreceiver should simply catch the broadcast(for example sms message received,log the info and finish).
However, I noticed that broadcast is not caught by the receiver, unless I indicate I have main Activity as the following AndroidManifest.xml will show:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.myapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<receiver android:name="com.myapp.MyBroadcastReceiver" >
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
<activity
android:name="com.myapp.MainActivity"
android:label="#string/activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
I don't even have to have an Activity class within the application.
Also, if I remove either android.intent.category.LAUNCHER or android.intent.action.MAIN in the intent filter, it does not worrk either.
The behavoir is the same on my phone and the emulator which are both running android 4.2
my Broadcastreceiver class looks like this:
public class MyBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context,intent.getAction(),Toast.LENGTH_SHORT).show();
}
}
Is it not possible to have an app with only a broadcastreceiver?
Starting from Android 3.1 (API 12), app cannot receive broadcasts until a UI component of an app (an Activity) has been manually opened by the user at least once. Even if user force stop the application , same is applied.
Reference : http://developer.android.com/about/versions/android-3.1.html#launchcontrols
SHouldn't you make a service instead of an application ? (I've never created a service, but i think it should be more appropriate in your case)
None of this broadcast receivers are not triggered, but in another my application is working where I used to check network state. I have nothing else to say about this problem.
package monitor;
import android.content.BroadcastReceiver;
public class Monitor extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
System.out.println("jupi");
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="monitor"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="15"/>
<uses-permission android:name="android.permission.RECEIVE_SMS"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<application
android:icon="#drawable/icon"
android:label="#string/app_name">
<service
android:name=".MonitorService">
</service>
<receiver
android:name=".Monitor">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
<action android:name="android.intent.action.PHONE_STATE" />
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
</application>
If you are seeing this behaviour on Android 3.1 or later, you are probably seeing the results of this change:
http://developer.android.com/about/versions/android-3.1.html#launchcontrols
Especially read this:
Note that the system adds FLAG_EXCLUDE_STOPPED_PACKAGES to all
broadcast intents. It does this to prevent broadcasts from background
services from inadvertently or unnecessarily launching components of
stoppped applications.
Since your application only contains a service and receivers, the user will never start this application and therefore if will remain in the "stopped" state, preventing it from seeing any broadcast intents.
When you added the Activity to your application, running it once was enough to remove the application from the "stopped" state so that your receivers were then eligible to receive broadcast intents. You actually don't need to dynamically register the receivers. It is enough to just have the user "start" the application once after installation.
Hi am trying to start the application on boot. App starts whenever boot completed but application launched and activity screen came to front. I want to start the app on boot but wont get launched. i included the manifest and BootUpReceiver.java .. Thanks.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.startapp"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<application android:icon="#drawable/icon" android:label="#string/app_name">
<receiver android:enabled="true" android:name=".BootUpReceiver"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<activity android:name=".StartApp"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<manifest>
BootUpReceiver.Java
public class BootUpReceiver extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent arg1) {
Intent i = new Intent(context, StartApp.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
I think you would like to start a Service which runs in the background instead of an Activity.
There is a question regarding that issue here.
Could it be that you are testing this on a HTC and have "Fast boot" enabled (Settings -> Power -> Fast boot). In that case no BOOT_COMPLETED will be sent.
Some more information in my question Detect if HTC “Fast boot” is enabled