I have a clock widget application, and I need to recognize when the phone has been unlocked or not, I believe I can use action USER_PRESENT for that, but I can't get it to launch in the BroadcastReceiver class, I set it in the manifest like this:
<receiver
android:name="com.myApp.myApp.MyWidgetIntentReceiver"
android:exported="false"
android:label="widgetBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.USER_PRESENT" >
</action>
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="#xml/demo_widget_provider" />
</receiver>
And this is how I trying to get it in the BroadcastReceiver:
public class MyWidgetIntentReceiver extends BroadcastReceiver{
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(Intent.ACTION_USER_PRESENT){
Log.i("TICK", intent.getAction());
}
}
}
It's not firing after I unlock the phone, can you help me out or provide me a better way to check when the phone has been unlocked? thanks!
Remove android:exported="false"
android:exported:
Whether or not the broadcast receiver can receive messages from sources outside its application — "true" if it can, and "false" if not. If "false", the only messages the broadcast receiver can receive are those sent by components of the same application or applications with the same user ID.
Source : developer.android.com
Remove android:exported="false". That worked for me on Stock Android 5
I got it to work by using registerReceiver in the onUpdate method of the AppWidgetProvider class and passing an instance of the BroadcastReceiver class to register the Intent.ACTION_USER_PRESENT, since adding it only in the Manifest was not doing anything. Thank you!
Related
i am building a small widget for learning purpose, it simply has an configuration activity where i set the update interval. it works normally and i can create multiple instance of it.
but when i reboot the phone the alarm manager stops, and the widget won't update.
after some search and google'ng i learned that i have to add a BOOT COMPLETE receiver
but after several attempts i failed to implement so any one has an i idea about how to add that or any good source code example on widgets.
To do something at boot you simply do following.
First in the manifest, this is added under application tag:
<receiver android:name="AlarmReceiver">
<intent-filter>
<action android:name="packagename.ACTION"/>
<action android:name="packagename.ACTION2"/>
</intent-filter>
</receiver>
<receiver android:name="BootSetter" >
<intent-filter>
<action
android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
In order for this to work you need to add permission to receive the Broadcast in the manifest with following line:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
Then you have a class BootSetter:
public class BootSetter extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Do your stuff
}
}
There is a similar post, though not completly the same here. It's about running an alarm every day at noon.
I think you are setting alarm manager in class other then AppWidgetProvider extended class(widget class) .Better you should set an alarmmanager in OnUpdate method AppWidgetProvider extended class (widget class)then there will be no need of setting the alarm again after boot.
I'm implementing a widget and I'm facing the following problems:
1) onUpdate is called when I add the widget to the home screen, even if I specified a Configuration Activity. As soon as I add it to the home screen, the APPWIDGET_ENABLED broadcast is sent, followed by the APPWIDGET_UPDATE and then the configuration activity is launched.. Is this a bug? How should I understand in the onUpdate method that is being invoked before the configuration activity has returned? I can do it through a shared preference value, but I'd like it to behave as written on the developer guide, i.e. the onUpdate method should not be called.
2) onUpdate is not called every updatePeriodMillis seconds, which have been set to 10000, i.e. 10 seconds for testing purposes.. Did I miss something in the receiver declaration within the Manifest file? I keep receiving the Lint warning Exported receiver does not require permission but I think this is a Lint issue and not my fault.
EDIT: I've just found this within the reference docs: Note: Updates requested with updatePeriodMillis will not be delivered more than once every 30 minutes. So it is correct that the widget is not updated how often I'd specified and I've changed the time to 1800000 milliseconds.
3) I want to deliver my own broadcast action to the widget provider, is it correct to add another receiver block in the Manifest targeting the same provider class or should I add only another intent action within the intent-filter that contains the APPWIDGET_UPDATE action? BTW, I've commented my second receiver block and it is not the cause of the problems above. I created another receiver block because I wanted to declare it as not exported, in order to let the intent-filter action be triggered only by my app code and not anyone else.
AndroidManifest.xml
<receiver android:name="MyWidgetProvider"
android:exported="true">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="#xml/my_widget_info" />
</receiver>
<receiver android:name="MyWidgetProvider"
android:exported="false">
<intent-filter>
<action android:name="org.test.mywidget.FORCE_SMALL_WIDGET_UPDATE" />
</intent-filter>
</receiver>
my_widget_info.xml
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:minWidth="294dp"
android:minHeight="110dp"
android:updatePeriodMillis="1800000"
android:initialLayout="#layout/my_widget_layout"
android:configure="org.test.mywidget.MyWidgetConfiguration"
android:resizeMode="none">
</appwidget-provider>
Providing an answer after digging into the source code:
1) This is expected behavior see here
This method is also called when the user adds the App Widget
2) Seems you have found your own answer. For others looking for the docs go here
Note: Updates requested with updatePeriodMillis will not be delivered more than once every 30 minutes
3) Since the AppWidgetProvider extends BroadcastReceiver but is not declared final you can add the action from your second receiver
<receiver android:name="MyWidgetProvider"
android:exported="true">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
<action android:name="org.test.mywidget.FORCE_SMALL_WIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="#xml/my_widget_info" />
</receiver>
then you can override onReceive in your MyWidgetProvider class and if the action is your custom action handle it, otherwise call to the super.onRecieve(Context context, Intent intent) like so:
#Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction()
.equals("org.test.mywidget.FORCE_SMALL_WIDGET_UPDATE")){
// handle your action
} else {
super.onRecieve(context, intent);
}
}
as per the Guide:
AppWidgetProvider is just a convenience class. If you would like to
receive the App Widget broadcasts directly, you can implement your own
BroadcastReceiver or override the onReceive(Context, Intent) callback.
One thing to note with this, the update to the remote view will only be called at the updatePeriodMillis, regardless of you adding your own action to the Intent for the provider to handle.
Good Luck and Happy Coding!
I have a broadcast receiver registered in Manifest:
<application ...>
<receiver android:name="com.some.pkg.NewAppReceiver" >
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED" />
</intent-filter>
</receiver>
</appcication>
And the receiver:
public class NewAppReceiver extends BroadcastReceiver {
private static final String TAG = "NewAppReceiver";
#Override
public void onReceive(Context context, Intent intent) {
Log.d(TAG, "Intent: " + intent.getAction());
}
}
And nothing is received when I install APK manually or from the Android Market. Why?
Did you run the app that contains this broadcastReceiver before installing the other apps?
Starting at some API version, broadcastReceivers will not work till you execute the app. Put an activity and execute it.
Also , don't forget to add the following into the broadcastReceiver:
<data android:scheme="package" />
EDIT: On Android 8 and above, if your app targets API 27 or more, it will work partially, so you have to register to those events in code and not in manifest. Here's a list of intents that are still safe to use in manifest: https://developer.android.com/guide/components/broadcast-exceptions.html .
The rest should be used in code. More info here
Since android.intent.action.PACKAGE_ADDED is a System Intent (note that your own app will not receive it at its installation), your BroadcastReceiver will receive messages from sources outside your app. Thus, check you did NOT put: android:exported="false"
You also may need to add:
<data android:scheme="package" />
So, your BroadcastReceiver in your AndroidManifest.xml should look like this:
<application ...>
<receiver android:name=".NewAppReceiver" android:exported="true">
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED" />
<data android:scheme="package" />
</intent-filter>
</receiver>
</appcication>
If it still doesn't work, you may try to put an higher priority, such as: android:priority="1000"
Take a look at: http://developer.android.com/guide/topics/manifest/receiver-element.html
Registering receiver from manifest would not work from API 26(android 8). Because it had performance impact on older versions.
But we can register receiver from java code and receive updates of removed and added applications.
val intentFilter = IntentFilter()
intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED)
intentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED)
intentFilter.addDataScheme("package")
registerReceiver(YourBroadcastReceiver(), intentFilter)
Are you trying to receive the intent in the application you are installing? The documentation for ACTION_PACKAGE_ADDED says:
Note that the newly installed package does not receive this broadcast.
Another possibility is that this intent might not be delivered to components registered via the manifest but only manually (as described in an answer by Mark Murphy to Stack Overflow question Can't receive broadcasts for PACKAGE intents).
If you try to receive some other package it must be worked.
(As #Savvas noted) If you try to receive your own package's addition you can't receive it. Even if your broadcast receiver has action.PACKAGE_ADDED, receiver's onReceive method isn't triggered.
In this case your best bet is saving this data. By using sharedPreferences, add a key something like "appIsWorkedBefore", and on your launcher Activity's onCreate method set this variable as "true". And you can make your works with respect to this Boolean.
This intent action is no longer available for applications.
This is a protected intent that can only be sent by the system.
https://developer.android.com/reference/android/content/Intent#ACTION_PACKAGE_ADDED
My code misses something, need your eyes to locate.
I created a USBOnReciever broadcastreceiver.
public class USBOnReceiver extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
Toast.makeText(context, "Phone was connected to power" ,Toast.LENGTH_LONG).show();
Log.d("tag", "Phone was connected to power");
}
}
My manifest is:
<application>
<receiver android:name=".USBOnReceiver" android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.UMS_CONNECTED" />
</intent-filter>
</receiver>
</application>
and here is when I stuck.
nothing appears to happen when connecting the USB ( I also tried with power_connected).
I understand I can register the BR either through the manifest or programmaticaly. But not sure how to implement.
In my activity I added
USBOnReceiver myReceiver = new USBOnReceiver();
But it looks so unconnected and useless :-/
Will appreciate your eyes here.
Your code is seems complete. If im not mistaken,
the only issue you have is: You wrote reciever inside your manifest instead of receiver.
So the BroadcastReceiver never got registered correctly.
To the topic of registering in code:
Yeah thats possible. Just create an instance of your receiver
and use Context.registerReceiver(mReceiver, new IntentFilter(...)).
If you have registered in your manifest, there is no need to do that.
BroadcastReceivers only live for the execution of onReceive(). Therefore
the system creates the instances and kills them afterwards.
I have an Android service which sends broadcast intents. I'm trying to get those intents in another application, which is an Android service. I wrote this in my manifest:
<!-- Service -->
<service android:enabled="true" android:name="...MyService"></service>
<!-- Receiver -->
<receiver android:name="...MyReceiver">
<intent-filter>
<action android:name="..."></action>
<action android:name="..."></action>
</intent-filter>
</receiver>
and this in my MyReceiver class:
public class ScannerBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// Process action.
Log.d(Globals.LOG_TAG, "Intent received.");
...
Unfortunately I never get the onReceive method invoked. Any idea why?
I start this service from another test application, so this is set as an Android library. The service is correctly started but this receiver is receiving nothing. Any idea what I'm doing wrong?
Thanks!
In manifest must be: android:name=".[package].ScannerBroadcastReceiver"
I solved the problem and I suppose it is due to the fact that this project was set as a library. If I don't set it this way the intent is correctly received. I haven't read about this anywhere.