Android studio request permission and IMEI/MEID

Question

I have problem in permission request , when I run my application I get this message. When i click on the "give me permission" it opens toast and ask me to allow or deny , when i click allow it will close the application. Then i should open it again and it will work correctly. When i click on the button there is toast message that I allow permission , Is there any fault in my code ?
Thank you

IN MANIFEST:

<uses-permission android:name="android.permission.READ_PHONE_STATE"/>

in java code in onclick() function that name is onSubmit():

public class MainActivity extends AppCompatActivity {
  private int PHONE_STATE_CODE=1;

  private Button button;
  TextView textView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate( savedInstanceState );
    setContentView( R.layout.activity_main );

    textView = (TextView) findViewById( R.id.textView2 );
  }

  public void onSubmit(View v){
    TelephonyManager t = (TelephonyManager) getSystemService( 
    Context.TELEPHONY_SERVICE );
    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
      Toast.makeText(MainActivity.this, "you have already granted", Toast.LENGTH_SHORT).show();
    } else {
      reqPhonePermission();
    }

    String me =t.getDeviceId();

    String id = t.getLine1Number();
  }

~~~~~~~ outside onClick()

private void reqPhonePermission(){
    if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_PHONE_STATE)){
        new AlertDialog.Builder(this).setTitle("permission needed").setMessage("this permission needed")
                .setPositiveButton("ok", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.READ_PHONE_STATE},PHONE_STATE_CODE);

                    }
                }) .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.dismiss();
            }
        }).create().show();
    } else {
        ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_PHONE_STATE},PHONE_STATE_CODE);
    }
}

public void onRequestPermissionResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults ){
    if(requestCode == PHONE_STATE_CODE){
        if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
            Toast.makeText(this,"Permission granted",Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this,"Permission denied",Toast.LENGTH_SHORT).show();
        }
    }

there is an image please select blue paragraph to see the photo on photo message that application stopped — K.rise, Mar 20 '18 at 19:04

Juan Cruz Soler · Answer 1 · 2018-03-20T20:11:58.287

The method that requires permission should be called only if the permission is granted.
You can be sure that the permission is granted when one of these conditions are true:

ContextCompat.checkSelfPermission == PackageManager.PERMISSION_GRANTED
grantResults[0] == PackageManager.PERMISSION_GRANTED

Try with this code:

public void onSubmit(View v){
    TelephonyManager t = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE );
    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
        Toast.makeText(MainActivity.this, "you have already granted", Toast.LENGTH_SHORT).show();
        methodThatRequiresPermission();
    } else {
        reqPhonePermission();
    }
}

public void onRequestPermissionResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults ){
    if(requestCode == PHONE_STATE_CODE){
        if(grantResults.length > 0 && grantResults[0] ==  PackageManager.PERMISSION_GRANTED){
            Toast.makeText(this,"Permission granted",Toast.LENGTH_SHORT).show();
            methodThatRequiresPermission();
        } else {
            Toast.makeText(this,"Permission denied",Toast.LENGTH_SHORT).show();
        }
    }
}

private void methodThatRequiresPermission() { 
    String me =t.getDeviceId();
    String id = t.getLine1Number();

    //Use the values here
}

Android studio request permission and IMEI/MEID

1 Answers1