LaunchEditInfoActivity.java

package tk.wasdennnoch.androidn_ify.ui.emergency.edit;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;

public class LaunchEditInfoActivity extends Activity {

    private static final int PERMISSIONS_REQUEST = 500;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        checkPermissions();
    }

    private void checkPermissions() {
        if (hasPerm(Manifest.permission.READ_CONTACTS) && hasPerm(Manifest.permission.CALL_PHONE)) {
            startEditActivity();
        } else {
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.READ_CONTACTS, Manifest.permission.CALL_PHONE},
                    PERMISSIONS_REQUEST);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           @NonNull String permissions[], @NonNull int[] grantResults) {
        switch (requestCode) {
            case PERMISSIONS_REQUEST: {
                if (grantResults.length > 1
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED
                        && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
                    startEditActivity();
                } else {
                    finish();
                }
            }
        }
    }

    private boolean hasPerm(String perm) {
        return ContextCompat.checkSelfPermission(this, perm) == PackageManager.PERMISSION_GRANTED;
    }

    private void startEditActivity() {
        finish();
        startActivity(new Intent(this, EditInfoActivity.class));
    }
}