问题
I'm creating an application, which will show toast messages before and after the call states. I generated and installed my application on my mobile. it was working well after a few days or sometimes a few hours. but after that, it's stopped, in order to run the application I need to open the application again. how can I modify my application to work very well? Thank you
manifest
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CALL_LOG" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.INTERNET" />
<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"></activity>
<activity android:name=".MainActivity2">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity> <!-- This part is inside the application -->
<receiver
android:name=".CallReceiver"
android:enabled="true">
<intent-filter android:priority="999">
<action android:name="android.intent.action.PHONE_STATE" />
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.NEW_OUTGOING_CALL" />
</intent-filter>
</receiver>
</application>
</manifest>
MainActivity.class
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
checkAndRequestPermissions();
}
private boolean checkAndRequestPermissions() {
int readPhoneState = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE);
int read_call_log = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CALL_LOG);
List listPermissionsNeeded = new ArrayList<>();
if (readPhoneState != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.READ_PHONE_STATE);
}
if (read_call_log != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.READ_CALL_LOG);
}
if (read_call_log != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.PROCESS_OUTGOING_CALLS);
}
if (read_call_log != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.INTERNET);
}
if (!listPermissionsNeeded.isEmpty()) {
ActivityCompat.requestPermissions(this,
(String[]) listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),
REQUEST_ID_MULTIPLE_PERMISSIONS);
return false;
}
return true;
}
CallReciver.class
public class CallReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
try {
runfirstTime(context,intent);
Toast.makeText(context, "1st", Toast.LENGTH_SHORT).show();
} catch (Exception ex) {
try {
}
catch (Exception e)
{
}
}
}
}
回答1:
New versions of Android does not allow you to do what you are trying to achieve, unless you create foreground service.
Android does not want apps to run in background without explicit knowledge of the user.
So you need to create a foreground service and show a persistent notification in notification panel. Then you can create a BroadcastReceiver from the Foreground Service.
Launch your service as a foreground service using the code below
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
context.startForegroundService(intent);
}
else {
context.startService(intent);
}
And in service onCreate() make something like that:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
startForeground(1, new Notification());
}
Links below will give you a little more insight into Foreground Services.
https://blog.logimonk.com/post/foreground-service-in-android
https://medium.com/@debuggingisfun/android-o-work-around-background-service-limitation-e697b2192bc3
Create your BroadcastReceiver from the service.
来源:https://stackoverflow.com/questions/63227315/how-can-i-make-this-phone-call-states-broadcast-receiver-to-work-all-the-times