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How to ask permission to make phone call from Android from Android version Marshmallow onwards?

由 江枫思渺然 提交于 2019-11-30 17:51:16

The stack trace seems to indicate that your permissions flow is working ok, but the call to startActivity from onRequestPermissionsResult() is crashing. Is the Intent you're passing to startActivity set correctly? I can't see it being set in that part of the code.

Note also that ContextCompat.checkSelfPermission handles the SDK version checking on your behalf, so you should be able to use 

if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE},REQUEST_PHONE_CALL);
}
else
{
    startActivity(intent);
}

by itself, without the wrapping SDK version check code.

Abhishek Luthra

I would better suggest to use ACTION_DIAL rather than ACTION_CALL while constructing Intent to call a particular number . Using ACTION_DIAL , you will need no call permissions in your app, as ACTION_DIAL opens the dialer with the number already entered, and further allows the user to decide whether to actually make the call or modify the phone number before calling or not call at all. 

Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + "Your Phone_number"));// Initiates the Intent 
startActivity(intent);

You need to create your Intent in onRequestPermissionsResult


@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case REQUEST_PHONE_CALL: {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + "+918511812660"));
                startActivity(intent);
            }
            else
            {

            }
            return;
        }
    }
}

add new method

public static boolean hasPermissions(Context context, String... permissions) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
    for (String permission : permissions) {
        if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
            return false;
        }
    }
}
return true;
}

add this in Global

int PERMISSION_ALL = 1; 
String[] PERMISSIONS = {Manifest.permission.READ_CONTACTS, Manifest.permission.CALL_PHONE};

and write below code in onCreate

if(!hasPermissions(this, PERMISSIONS)){
ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
}

Change your onRequestPermissionsResult to below, you basically need to create the intent first and then call it on permission granted. That's where you are doing it wrong.

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case REQUEST_PHONE_CALL : {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + "+918511812660"));

                if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
                    startActivity(intent);
                }
            }
        }
    }
}
标签
java
android
phone-call
runtime-permissions
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