如何在Android Oreo和Pie中检测来电

Question

I'm working on an application, I'm able to detect incoming calls up-to marshmallow. But in Oreo and Pie, I'm not able to detect incoming calls because the Broadcast receiver is not triggering. Please Help me out.

Answer 1

After Android 6.0+, even if you have permissions set in the AndroidManifest.xml file, you still have to explicitly ask the user for them if they fall under the category of dangerous permissions. This is the list of such permissions:

ACCESS_COARSE_LOCATION
ACCESS_FINE_LOCATION
ADD_VOICEMAIL
BODY_SENSORS
CALL_PHONE
CAMERA
GET_ACCOUNTS
PROCESS_OUTGOING_CALLS
READ_CALENDAR
READ_CALL_LOG
READ_CELL_BROADCASTS
READ_CONTACTS
READ_EXTERNAL_STORAGE
READ_PHONE_STATE
READ_SMS
RECEIVE_MMS
RECEIVE_SMS
RECEIVE_WAP_PUSH
RECORD_AUDIO
SEND_SMS
USE_SIP
WRITE_CALENDAR
WRITE_CALL_LOG
WRITE_CONTACTS
WRITE_EXTERNAL_STORAGE
To ask for such permissions here's the code you can use (I used it in MainActivity.java in the onCreate method):

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
    if (checkSelfPermission(Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_DENIED || checkSelfPermission(Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_DENIED) {
        String[] permissions = {Manifest.permission.READ_PHONE_STATE, Manifest.permission.CALL_PHONE};
        requestPermissions(permissions, PERMISSION_REQUEST_READ_PHONE_STATE);
    }
}

The PERMISSION_REQUEST_READ_PHONE_STATE variable is used to determine which permission was asked for in the onRequestPermissionsResult method. Of course, if you don't need to execute any logic depending on whether or not the user approved the permission, you can leave out this method:

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case PERMISSION_REQUEST_READ_PHONE_STATE: {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "Permission granted: " + PERMISSION_REQUEST_READ_PHONE_STATE, Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "Permission NOT granted: " + PERMISSION_REQUEST_READ_PHONE_STATE, Toast.LENGTH_SHORT).show();
            }

            return;
        }
    }
}

copy of: https://dev.to/hitman666/how-to-make-a-native-android-app-that-can-block-phone-calls--4e15

more info https://developer.android.com/training/permissions/requesting?hl=es-419