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      1 /*
      2  * Copyright (C) 2009 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.dpi.cts;
     18 
     19 import android.content.Context;
     20 import android.content.pm.PackageManager;
     21 import android.platform.test.annotations.Presubmit;
     22 import android.test.AndroidTestCase;
     23 import android.util.DisplayMetrics;
     24 import android.view.Display;
     25 import android.view.WindowManager;
     26 
     27 import java.util.HashSet;
     28 import java.util.Set;
     29 
     30 /**
     31  * Test for verifying a device's screen configuration.
     32  */
     33 public class ConfigurationTest extends AndroidTestCase {
     34 
     35     @Presubmit
     36     public void testScreenConfiguration() {
     37         WindowManager windowManager =
     38                 (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
     39         Display display = windowManager.getDefaultDisplay();
     40         DisplayMetrics metrics = new DisplayMetrics();
     41         display.getMetrics(metrics);
     42 
     43         double xInches = (double) metrics.widthPixels / metrics.xdpi;
     44         double yInches = (double) metrics.heightPixels / metrics.ydpi;
     45         double diagonalInches = Math.sqrt(Math.pow(xInches, 2) + Math.pow(yInches, 2));
     46         double minSize = 2.5d;
     47         if (getContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) {
     48             // Watches have a different minimum diagonal.
     49             minSize = 1.0d;
     50         }
     51         assertTrue("Screen diagonal must be at least " + minSize + " inches: " + diagonalInches,
     52                 diagonalInches >= minSize);
     53 
     54         double density = 160.0d * metrics.density;
     55         assertTrue("Screen density must be at least 100 dpi: " + density, density >= 100.0d);
     56 
     57         Set<Integer> allowedDensities = new HashSet<Integer>();
     58         allowedDensities.add(DisplayMetrics.DENSITY_LOW);
     59         allowedDensities.add(DisplayMetrics.DENSITY_MEDIUM);
     60         allowedDensities.add(DisplayMetrics.DENSITY_TV);
     61         allowedDensities.add(DisplayMetrics.DENSITY_HIGH);
     62         allowedDensities.add(DisplayMetrics.DENSITY_260);
     63         allowedDensities.add(DisplayMetrics.DENSITY_280);
     64         allowedDensities.add(DisplayMetrics.DENSITY_300);
     65         allowedDensities.add(DisplayMetrics.DENSITY_XHIGH);
     66         allowedDensities.add(DisplayMetrics.DENSITY_340);
     67         allowedDensities.add(DisplayMetrics.DENSITY_360);
     68         allowedDensities.add(DisplayMetrics.DENSITY_400);
     69         allowedDensities.add(DisplayMetrics.DENSITY_420);
     70         allowedDensities.add(DisplayMetrics.DENSITY_XXHIGH);
     71         allowedDensities.add(DisplayMetrics.DENSITY_560);
     72         allowedDensities.add(DisplayMetrics.DENSITY_XXXHIGH);
     73         assertTrue("DisplayMetrics#densityDpi must be one of the DisplayMetrics.DENSITY_* values: "
     74                 + allowedDensities, allowedDensities.contains(metrics.densityDpi));
     75 
     76         assertEquals(metrics.density,
     77                 (float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT,
     78                 0.5f / DisplayMetrics.DENSITY_DEFAULT);
     79     }
     80 }
     81