Java tutorial
/* * Copyright (C) 2015 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package foo.bar.permission2; import android.Manifest; import android.app.Activity; import android.app.LoaderManager; import android.content.CursorLoader; import android.content.Loader; import android.content.pm.PackageManager; import android.database.Cursor; import android.os.Bundle; import android.provider.CalendarContract; import android.provider.ContactsContract; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.CursorAdapter; import android.widget.ListView; import android.widget.SimpleCursorAdapter; import android.widget.Toast; /** * Simple sample of how to use the runtime permissions APIs. */ public class PermissionActivity extends Activity implements LoaderManager.LoaderCallbacks<Cursor>, ActivityCompat.OnRequestPermissionsResultCallback { public static final String LOG_TAG = "PermissionActivity"; private static final int CONTACTS_LOADER = 1; private static final int EVENTS_LOADER = 2; private static final int PERMISSIONS_REQUEST_READ_CONTACTS = 1; private static final int PERMISSIONS_REQUEST_READ_CALENDAR = 2; private static final int PERMISSIONS_REQUEST_ALL_PERMISSIONS = 3; private final static String[] CONTACTS_COLUMNS = { ContactsContract.Contacts.DISPLAY_NAME_PRIMARY }; private final static String[] CALENDAR_COLUMNS = { CalendarContract.Events.TITLE }; private static final String[] CONTACTS_PROJECTION = { ContactsContract.Contacts._ID, ContactsContract.Contacts.DISPLAY_NAME_PRIMARY }; private static final String[] EVENTS_PROJECTION = { CalendarContract.Events._ID, CalendarContract.Events.TITLE }; private final static int[] TO_IDS = { android.R.id.text1 }; private ListView mListView; private CursorAdapter mContactsAdapter; private CursorAdapter mEventsAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); bindUi(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.actions, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.show_contacts: { showContacts(); return true; } case R.id.show_events: { showEvents(); return true; } case R.id.request_all_perms: { requestPermissions(); return true; } } return false; } @Override public Loader<Cursor> onCreateLoader(int loaderId, Bundle args) { switch (loaderId) { case CONTACTS_LOADER: { return new CursorLoader(this, ContactsContract.Contacts.CONTENT_URI, CONTACTS_PROJECTION, null, null, null); } case EVENTS_LOADER: { return new CursorLoader(this, CalendarContract.Events.CONTENT_URI, EVENTS_PROJECTION, null, null, null); } default: { return null; } } } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { switch (loader.getId()) { case CONTACTS_LOADER: { mContactsAdapter.swapCursor(cursor); } break; case EVENTS_LOADER: { mEventsAdapter.swapCursor(cursor); } break; } } @Override public void onLoaderReset(Loader<Cursor> loader) { switch (loader.getId()) { case CONTACTS_LOADER: { mContactsAdapter.swapCursor(null); } break; case EVENTS_LOADER: { mEventsAdapter.swapCursor(null); } break; } } @Override public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { switch (requestCode) { case PERMISSIONS_REQUEST_READ_CONTACTS: { if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { showContacts(); } } break; case PERMISSIONS_REQUEST_READ_CALENDAR: { if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { showEvents(); } } break; } } private void bindUi() { setContentView(R.layout.permission_activity); mListView = (ListView) findViewById(R.id.list); View emptyView = findViewById(R.id.empty_state); mListView.setEmptyView(emptyView); mContactsAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, null, CONTACTS_COLUMNS, TO_IDS, 0); mEventsAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, null, CALENDAR_COLUMNS, TO_IDS, 0); } private void showContacts() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) { if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_CONTACTS)) { Toast.makeText(this, "I really need it, dude!", Toast.LENGTH_SHORT).show(); } ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.READ_CONTACTS }, PERMISSIONS_REQUEST_READ_CONTACTS); return; } if (getLoaderManager().getLoader(CONTACTS_LOADER) == null) { getLoaderManager().initLoader(CONTACTS_LOADER, null, this); } mListView.setAdapter(mContactsAdapter); } private void showEvents() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CALENDAR) != PackageManager.PERMISSION_GRANTED) { if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_CALENDAR)) { Toast.makeText(this, "I really need it, dude!", Toast.LENGTH_SHORT).show(); } ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.READ_CALENDAR }, PERMISSIONS_REQUEST_READ_CALENDAR); return; } if (getLoaderManager().getLoader(EVENTS_LOADER) == null) { getLoaderManager().initLoader(EVENTS_LOADER, null, this); } mListView.setAdapter(mEventsAdapter); } private void requestPermissions() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CALENDAR) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) { String[] permissions = new String[] { Manifest.permission.READ_CONTACTS, Manifest.permission.READ_CALENDAR }; ActivityCompat.requestPermissions(this, permissions, PERMISSIONS_REQUEST_ALL_PERMISSIONS); } } }