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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package android.fragment.cts;
     17 
     18 import android.app.LoaderManager;
     19 import android.content.AsyncTaskLoader;
     20 import android.content.Context;
     21 import android.content.Loader;
     22 import android.os.Bundle;
     23 import android.view.ViewGroup;
     24 import android.widget.TextView;
     25 
     26 import java.util.concurrent.CountDownLatch;
     27 
     28 /**
     29  * This Activity sets the text when loading completes. It also tracks the Activity in
     30  * a static variable, so it must be cleared in test tear down.
     31  */
     32 public class LoaderActivity extends RecreatedActivity {
     33     public TextView textView;
     34     public TextView textViewB;
     35     public CountDownLatch loadFinished = new CountDownLatch(1);
     36 
     37     @Override
     38     protected void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40 
     41         setContentView(R.layout.text_a);
     42         textView = (TextView) findViewById(R.id.textA);
     43 
     44         ViewGroup container = (ViewGroup) textView.getParent();
     45         textViewB = new TextView(this);
     46         textViewB.setId(R.id.textB);
     47         container.addView(textViewB);
     48     }
     49 
     50     @Override
     51     protected void onResume() {
     52         super.onResume();
     53         getLoaderManager().initLoader(0, null, new TextLoaderCallback());
     54     }
     55 
     56     class TextLoaderCallback implements LoaderManager.LoaderCallbacks<String> {
     57         @Override
     58         public Loader<String> onCreateLoader(int id, Bundle args) {
     59             return new TextLoader(LoaderActivity.this);
     60         }
     61 
     62         @Override
     63         public void onLoadFinished(Loader<String> loader, String data) {
     64             textView.setText(data);
     65             loadFinished.countDown();
     66         }
     67 
     68         @Override
     69         public void onLoaderReset(Loader<String> loader) {
     70         }
     71     }
     72 
     73     static class TextLoader extends AsyncTaskLoader<String> {
     74         TextLoader(Context context) {
     75             super(context);
     76         }
     77 
     78         @Override
     79         protected void onStartLoading() {
     80             forceLoad();
     81         }
     82 
     83         @Override
     84         public String loadInBackground() {
     85             return "Loaded!";
     86         }
     87     }
     88 }
     89 
     90