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 17 package android.display.cts; 18 19 import android.app.Activity; 20 import android.os.Bundle; 21 import android.view.Display; 22 import android.view.WindowManager; 23 24 import androidx.annotation.Nullable; 25 26 /** 27 * Test activity to exercise getting metrics for displays. 28 */ 29 public class DisplayTestActivity extends Activity { 30 31 private static final String PREFERRED_DISPLAY_MODE_ID = "preferred_display_mode_id"; 32 private int mPreferredDisplayModeId = 0; 33 34 @Override onSaveInstanceState(Bundle outBundle)35 public void onSaveInstanceState(Bundle outBundle) { 36 super.onSaveInstanceState(outBundle); 37 38 outBundle.putInt(PREFERRED_DISPLAY_MODE_ID, mPreferredDisplayModeId); 39 } 40 41 @Override onCreate(@ullable Bundle savedInstanceState)42 public void onCreate(@Nullable Bundle savedInstanceState) { 43 super.onCreate(savedInstanceState); 44 45 if (savedInstanceState != null) { 46 mPreferredDisplayModeId = savedInstanceState.getInt(PREFERRED_DISPLAY_MODE_ID, 0); 47 resetLayoutParams(); 48 } 49 } 50 51 /** Set an override for the display mode. This is called directly from test instrumentation. */ setPreferredDisplayMode(Display.Mode mode)52 public void setPreferredDisplayMode(Display.Mode mode) { 53 mPreferredDisplayModeId = mode.getModeId(); 54 resetLayoutParams(); 55 } 56 resetLayoutParams()57 private void resetLayoutParams() { 58 WindowManager.LayoutParams params = getWindow().getAttributes(); 59 params.preferredDisplayModeId = mPreferredDisplayModeId; 60 getWindow().setAttributes(params); 61 } 62 } 63