In my app, I have a Broadcast Receiver for catching the message sent to my phone
<receiver
android:name="com.qmobile.ows.SMS_Receiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
If I start app with activity GUI, the BroadCast Receiver works normally.
I want to start my application without activity and do not show icon app, so I remove this code below from my activity
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
And after that, Broadcast Receiver do not work.
Please help me solve this problem.
This is because Android OS does not allow BroadcastReceiver to receive some important broadcast(android.provider.Telephony.SMS_RECEIVED must be one of it) if the app´s process is not alive.It was designed to against the evil apps. If you have an activity running,your process is alive and so your receiver is allowed to receive the broadcast.
I think you can make a transparent activity and use startService to start a service in background,then finish the activity.As your service is running ,your process is alive,so the Android OS will let you to receive the broadcast.
For Android 3.1 and higher,
You have to launch one of your activities before any manifest-registered BroadcastReceiver will work.
See developer docs specifically the section -
Launch controls on stopped applications for android-3.1
If you are testing Broadcast receiver without an Activity then you should edit your run configuration.
When the Edit configuration dialog appears, select the Do not launch Activity option so that the activity is installed but not launched and click on the Run button
This will launch the application without activity.
This could help you:
Creating and Sending the Broadcast Intent
Having created the framework for the SendBroadcast application, it is now time to implement the code to send the broadcast intent. This involves implementing the broadcastIntent() method specified previously as the onClick target of the Button view in the user interface. Locate and double click on the SendBroadcastActivity.java file and modify it to add the code to create and send the broadcast intent. Once modified, the source code for this class should read as follows:
package com.ebookfrenzy.sendbroadcast;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.content.Intent;
import android.view.View;
public class SendBroadcastActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_send_broadcast);
}
public void broadcastIntent(View view)
{
Intent intent = new Intent();
intent.setAction("com.ebookfrenzy.sendbroadcast");
intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
sendBroadcast(intent);
}
.
.
.
}
Creating the Broadcast Receiver
In order to create the broadcast receiver, a new class needs to be created which subclasses the BroadcastReceiver superclass. Create a new project with the application name set to BroadcastReceiver and the company domain name set to com.ebookfrenzy, this time selecting the Add No Activity option before clicking on Finish.
Within the Project tool window, navigate to app -> java and right click on the package name. From the resulting menu, select the New -> Other -> Broadcast Receiver menu option, name the class MyReceiver and make sure the Exported and Enabled options are selected.
Once created, Android Studio will automatically load the new MyReceiver.java class file into the editor where it should read as follows:
package com.ebookfrenzy.broadcastreceiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class MyReceiver extends BroadcastReceiver {
public MyReceiver() {
}
#Override
public void onReceive(Context context, Intent intent) {
// TODO: This method is called when the BroadcastReceiver is receiving
// an Intent broadcast.
throw new UnsupportedOperationException("Not yet implemented");
}
}
As can be seen in the code, Android Studio has generated a template for the new class and generated a stub for the onReceive() method. A number of changes now need to be made to the class to implement the required behavior. Remaining in the MyReceiver.java file, therefore, modify the code so that it reads as follows:
package com.ebookfrenzy.broadcastreceiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver {
public MyReceiver() {
}
#Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Broadcast Intent Detected.",
Toast.LENGTH_LONG).show();
}
}
The code for the broadcast receiver is now complete.
Configuring a Broadcast Receiver in the Manifest File
In common with other Android projects, BroadcastReceiver has associated with it a manifest file named AndroidManifest.xml.
This file needs to publicize the presence of the broadcast receiver and must include an intent filter to specify the broadcast intents in which the receiver is interested. When the BroadcastReceiver class was created in the previous section, Android Studio automatically added a <receiver> element to the manifest file. All that remains, therefore, is to add an <intent-filter> element within the <receiver> declaration appropriately configured for the custom action string:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ebookfrenzy.broadcastreceiver.broadcastreceiver" >
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<receiver
android:name=".MyReceiver"
android:enabled="true"
android:exported="true" >
<intent-filter>
<action
android:name="com.ebookfrenzy.sendbroadcast" >
</action>
</intent-filter>
</receiver>
</application>
</manifest>
With the manifest file completed, the broadcast example is ready to be tested.
add DEFAULT category in your intent filter
<category android:name="android.intent.category.DEFAULT" />
Ok. Here's what worked for me. I created a launcher activity. Removed the call to setContentView(R.layout.activity_main)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
finish();
}
Related
I try to develop an application that in the future can run a service, the service I want to run when I connect to a network.
At the moment I only need the receiver to print in the log (using react-native log-android) that has been connected or disconnected, or to visualise a toast with a message, all this in the background not in the foreground.
Try the following,
First I put the receiver in the AndroidManifest.xml
<application>
...
<receiver android:name="com.air_fighers_react_native.receiver.NetworkChangeReceiver">
<intent-filter>
<action android:name="android.net.conn.CONECTIVITY_CHANGE"/>
</intent-filter>
</receiver>
</application>
Even add the permissions:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
Create the receiver folder in java > com > air_fighters_react_native > receiver and inside the NetworkChangeReceiver.java file with the following code:
package com.air_fighters_react_native.receiver;
import android.content.BroadcastReceiver
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class NetworkChangeReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Cambio de conexion.", Toast.LENGTH_LONG).show();
}
}
With this it is supposed that it should be enough, however when running the application there are no problems, but when I close the application and activate and deactivate the WiFi the toast message is not displayed, not even when I have the application in the foreground.
I have already tried changing receiver to:
<receiver android:name=".NetworkChangeReceiver">
And changing NetworChangeReceiver to the same level as MainApplication and MainActivity in folders.
I'm implementing a simple App that can receive 'share's from the YouTube App and simply sends it to a server.
I'm able to pass the Intent to a ShareActivity I've implemented, but every time I share a video from YouTube, it opens the ShareActivity.
Since the user doesn't need to interact with the App while sharing, I'd like to remove this phase entirely. That is, I'd like to receive the Intent from Youtube and process it in the background without any hassle to the user.
I'm thinking of creating an IntentService that can handle such incoming Intents, but I'm not sure how to proceed. (Is this the right way to achieve this? If so, from where should I start the IntentService?, Will it be able to receive Intents if the user kills my app?)
I can't seem to find any resources on the Internet regarding this. Any help is appreciated.
Edit: Okay, This is a minimal, not-working example. I hope this can help you guys guide me better. Cause I'm stuck.
Android Manifest File
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.blumonkey.versatyl">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".ShareService"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:host="www.youtube.com" android:mimeType="text/*" />
</intent-filter>
</service>
</application>
MainActivity.java
package com.blumonkey.versatyl;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent msgIntent = new Intent(this, ShareService.class);
startService(msgIntent);
}
}
ShareService.java
package com.blumonkey.versatyl;
import android.app.IntentService;
import android.content.Intent;
import android.util.Log;
/**
* An {#link IntentService} subclass for handling asynchronous task requests in
* a service on a separate handler thread.
* <p>
* TODO: Customize class - update intent actions and extra parameters.
*/
public class ShareService extends IntentService {
public ShareService() {
super("ShareService");
}
#Override
protected void onHandleIntent(Intent intent) {
Log.d("Msg:", "Got Intent!");
}
}
The only message that I see in the Log is when the MainActivity sends the Intent to the service to start it.
IntentService would be fine, or even a regular Service if you will need to use resources for long period of time - you just need to add an IntentFilter with the proper filter options to the service in the manifest.
The Android docs explain it for both Activities and Services:
https://developer.android.com/guide/components/intents-filters.html
Sometimes an Intent is designed to be handled by an Activity so just be cautious about that.
And this is the correct way to "wake up" your app if a user "kills" it. An Intent that your app is designed to handle will receive it. However, sometimes users can set preferred apps to handled certain Intents, in which case you do not have control over what happens.
In my Android application I want to run a Service without opening/running my application. For that I have extended BroadcastReciever class. But this BroadcastReceiver class is not being called from AndroidManifest.xml on BOOT_COMPLETE. So please tell what is the problem in my code? Or is there any other way to run a Service without opening my application? I have checked the control flow of my code and whole the code is working perfectly, the problem is that BroadcastReceiver is not being called.
Part of AndroidManifest.xml file:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<service android:name=".HelloService"
android:exported="false"/>
<receiver android:name=".MyBroadcastreceiver" android:enabled="true" android:exported="false">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
MyBroadcastreceiver.java class
package com.example.abc.project1;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class MyBroadcastreceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
/*this is not being called*/
Intent startServiceIntent = new Intent(context, HelloService.class);
context.startService(startServiceIntent);
}
}
Remove android:exported="false" from the <receiver>. That says you do not want anyone (other than yourself) sending a broadcast to this receiver. As a result, your receiver will be ignored by the system.
Beyond that, you also need an activity and to have run that activity before trying to reboot the device. You may already have that, but I thought that I would mention it for completeness.
Hello i would to develop a simple app without Main Activity as launcher.
I want to register a broadcast receiver which starts after reboot of device and inside OnReceive callback starts an Activity
Here my manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="it.examples"
android:versionCode="1"
android:versionName="1.0"
>
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="18" />
<application android:label="#string/app_name" android:icon="#drawable/ic_launcher">
<receiver android:name=".AfterRebootBR" android:exported="false"
android:label="Boot Notification Receiver" android:enabled="true"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
<activity android:name=".MainActivity"
android:label="#string/app_name">
</activity>
</application>
</manifest>
And here my Broadcast receiver
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package it.examples;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class AfterRebootBR extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.d("AfterRebootBR","***************** ON RECEIVE *********************");
Log.e("AfterRebootBR","***************** ON RECEIVE *********************");
Intent i = new Intent(context, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
And finally the MainActivity
package it.examples;
import android.app.Activity;
import android.os.Bundle;
public class MainActivity extends Activity
{
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
What is wrong in my code?
Thanks in advance
Francesco
my code is working..here is it...
in manifest
<receiver
android:name="com.calender.calenderevent.Reboot_Reciever"
android:enabled="true"
android:exported="true"
android:label="BootReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" >
</action>
</intent-filter>
</receiver>
I cant see anything wrong with your code, however i have something worth to try.
Move the permission out of the application tag :
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
If its not working, simplify the receiver :
<receiver android:name=".AfterRebootBR">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
Still not working? Try to add some delay, as mentioned here :
Timer timer = new Timer();
timer.schedule(new TimerTask() {
#Override
public void run() {
//run your service
}
}, 10000);
Quoted from the link above :
While, I suggestion to delay several seconds, e.g., 10 seconds, before
running the (1) line, which is more stable for different phones and
services.
For example, in my case, my service is going to write sd card. If you
start your service immediately, some phones may fail because the sd
card is not ready.
Starting with android 3.1 you cannot have a broadcast receiver to get spawned by the application service manager if it has no context in active state (aka. at least an activity or service that is keeping the process in an "active state")
Excerpt from specification
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. A background service or
application can override this behavior by adding the FLAG_INCLUDE_STOPPED_PACKAGES
flag to broadcast intents that should be allowed to activate stopped applications.
Applications are in a stopped state when they are first installed but are not yet
launched and when they are manually stopped by the user (in Manage Applications).
You need to somehow start your application, and then send it in a dormant state (but registered in the app manager). You can use a service for this.
It is strongly NOT recommended to start Activity from BroadcastReciever:
https://developer.android.com/training/run-background-service/report-status.html#ReceiveStatus
Never start an Activity in response to an incoming broadcast Intent.
In my case PackageManager.DONT_KILL_APP helped:
https://developer.android.com/training/scheduling/alarms.html#boot
ComponentName receiver = new ComponentName(context, SampleBootReceiver.class);
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(receiver,
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
I've experimented with MIUI 8 firmware real device Xiaomi Redmi Note 3.
My findings are:
you have to add app to autorun to enable it be fired by broadcast. I've checked it with such serious apps as Viber, WhatsApp.
I've compared with manifest settings (without enabling reciever programmatically):
<receiver
android:name=".activities.broadcastrecievers.CallReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
I am trying to write a code in Android , to create a condition during booting but my condition satisfies everytime ( during booting as well as during running of the device also). I am trying to do is , to execute the condition during the booting only.
My Code :
MainActivity.java
package com.example.bootingtest;
import android.os.Bundle;
import android.widget.Toast;
import android.app.Activity;
import android.content.Intent;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Intent.ACTION_BOOT_COMPLETED!=null) {
Toast.makeText(getApplicationContext(), "Device is booting ...", Toast.LENGTH_LONG).show();
}
}
}
I have given manifest permission .
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
I want to execute this condition only during booting or device start-up but this condition satisfies every time , whenever I open the app.
Please suggest to me how I can run the condition only during the device booting or start-up.
Please help me out.
The Intent.ACTION_BOOT_COMPLETED is a constant, so it's values never changes, that's why you get always true when you activity starts.
What you have to do is declare a BroadcastReceiver on the manifest and implement it, than add a IntentFilter on your declaration to receive the broadcast.
Something like this:
AndroidManifest.xml:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
....
<receiver
android:name=".BootReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
...
BootReceiver.java:
public class BootReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
//Do what you need to execute on boot here.
}
}
the class Intent has a string called ACTION_BOOT_COMPLETED that is not null (it has a value). that is what you are checking. what you mean to do is done completely different in a BroadcastReceiver.