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@shubham08gupta
Created September 17, 2016 08:34
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A simple class to manage android permissions in Marshmallow version (Android 6.0) or above.
package com.example.logintutorial;
import android.Manifest;
import android.annotation.TargetApi;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
public class AskPermission extends AppCompatActivity {
private static final int READ_CONTACTS_REQUEST_CODE = 1;
@TargetApi(Build.VERSION_CODES.M)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ask_permission);
/*check if we have permission or not
returns Permission_GRANTED if we have, otherwise Permission_DENIED
*/
// no need to check android version as these classes are of support library which already checks android version
int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS);
if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
// perform your work
} else {
// request for permission
boolean isDeniedPreviously = ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_CONTACTS);
if (isDeniedPreviously) {
// show an explanation as to why you need this permission and again request for permission
// if don't ask again box is checked, and we have again asked for permission it will directly call
// onRequestPermissionResult with Permission_DENIED result
} else {
// request for permission
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_CONTACTS}, READ_CONTACTS_REQUEST_CODE); // shows the dialog
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == READ_CONTACTS_REQUEST_CODE) {
// if request is cancelled grantResults array is empty
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// perform your work as permission is granted
} else {
// permission is denied so disable any functionality the app will use because of this permission
//your app might show a dialog or snackbar explaining why it could not perform the user's requested action that needs that permission.
}
}
}
}
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