1 /*
2  * Copyright (C) 2008 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 
17 package android.os;
18 
19 import android.app.Activity;
20 import android.hardware.display.DisplayManager;
21 import android.provider.Settings;
22 import android.view.View;
23 import android.view.View.OnClickListener;
24 import android.widget.Button;
25 
26 import com.android.frameworks.coretests.R;
27 
28 /**
29  * Tries to set the brightness to 0. Should be silently thwarted by the framework.
30  */
31 public class BrightnessLimit extends Activity implements OnClickListener {
32 
33     @Override
onCreate(Bundle savedInstanceState)34     protected void onCreate(Bundle savedInstanceState) {
35         super.onCreate(savedInstanceState);
36 
37         setContentView(R.layout.brightness_limit);
38 
39         Button b = findViewById(R.id.go);
40         b.setOnClickListener(this);
41     }
42 
onClick(View v)43     public void onClick(View v) {
44         DisplayManager dm = getSystemService(DisplayManager.class);
45         final int displayId = getBaseContext().getDisplay().getDisplayId();
46         dm.setTemporaryBrightness(displayId, 0.0f);
47         Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 0);
48     }
49 }
50 
51