| /* |
| * Copyright (C) 2009 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 android.view.cts; |
| |
| import android.content.Context; |
| import android.test.AndroidTestCase; |
| import android.util.DisplayMetrics; |
| import android.view.Display; |
| import android.view.WindowManager; |
| |
| public class DisplayTest extends AndroidTestCase { |
| |
| /** |
| * Test the properties of Display, they are: |
| * 1 index of this display |
| * 2 height of this display in pixels |
| * 3 width of this display in pixels |
| * 4 orientation of this display |
| * 5 pixel format of this display |
| * 6 refresh rate of this display in frames per second |
| * 7 Initialize a DisplayMetrics object from this display's data |
| */ |
| public void testGetDisplayAttrs() { |
| Context con = getContext(); |
| WindowManager windowManager = (WindowManager) con.getSystemService(Context.WINDOW_SERVICE); |
| Display display = windowManager.getDefaultDisplay(); |
| |
| assertEquals(Display.DEFAULT_DISPLAY, display.getDisplayId()); |
| assertTrue(0 < display.getHeight()); |
| assertTrue(0 < display.getWidth()); |
| display.getOrientation(); |
| assertTrue(0 < display.getPixelFormat()); |
| assertTrue(0 < display.getRefreshRate()); |
| |
| DisplayMetrics outMetrics = new DisplayMetrics(); |
| outMetrics.setToDefaults(); |
| display.getMetrics(outMetrics); |
| assertEquals(display.getHeight(), outMetrics.heightPixels); |
| assertEquals(display.getWidth(), outMetrics.widthPixels); |
| |
| // The scale is in [0.1, 3], and density is the scale factor. |
| assertTrue(0.1f <= outMetrics.density && outMetrics.density <= 3.0f); |
| assertTrue(0.1f <= outMetrics.scaledDensity && outMetrics.density <= 3.0f); |
| assertTrue(0 < outMetrics.xdpi); |
| assertTrue(0 < outMetrics.ydpi); |
| } |
| } |