suppender of AndroidStudy
12/21/2016 - 8:21 AM

Runtime Permissions

public class MainActivity extends AppCompatActivity {

    protected void onCreate(Bundle savedInstanceState) {
        // In an actual app, you'd want to request a permission when the user performs an action
        // that requires that permission.

    // Identifier for the permission request
    private static final int READ_CONTACTS_PERMISSIONS_REQUEST = 1;

    // Called when the user is performing an action which requires the app to read the
    // user's contacts
    public void getPermissionToReadUserContacts() {
        // 1) Use the support library version ContextCompat.checkSelfPermission(...) to avoid
        // checking the build version since Context.checkSelfPermission(...) is only available
        // in Marshmallow
        // 2) Always check for permission (even if permission has already been granted)
        // since the user can revoke permissions at any time through Settings
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)
                != PackageManager.PERMISSION_GRANTED) {

            // The permission is NOT already granted.
            // Check if the user has been asked about this permission already and denied
            // it. If so, we want to give more explanation about why the permission is needed.
            if (shouldShowRequestPermissionRationale(
                    Manifest.permission.READ_CONTACTS)) {
                // Show our own UI to explain to the user why we need to read the contacts
                // before actually requesting the permission and showing the default UI

            // Fire off an async request to actually get the permission
            // This will show the standard permission request dialog UI
            requestPermissions(new String[]{Manifest.permission.READ_CONTACTS},

    // Callback with the request from calling requestPermissions(...)
    public void onRequestPermissionsResult(int requestCode,
                                           @NonNull String permissions[],
                                           @NonNull int[] grantResults) {
        // Make sure it's our original READ_CONTACTS request
        if (requestCode == READ_CONTACTS_PERMISSIONS_REQUEST) {
            if (grantResults.length == 1 &&
                    grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "Read Contacts permission granted", Toast.LENGTH_SHORT).show();
            } else {
                // showRationale = false if user clicks Never Ask Again, otherwise true
                boolean showRationale = shouldShowRequestPermissionRationale( this, Manifest.permission.READ_CONTACTS);

                if (showRationale) {
                   // do something here to handle degraded mode
                } else {
                   Toast.makeText(this, "Read Contacts permission denied", Toast.LENGTH_SHORT).show();
        } else {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
<manifest xmlns:android=""
    package="" >
    <uses-permission android:name="android.permission.INTERNET" />