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 com.google.android.test.dpi;
18 
19 import android.app.Activity;
20 import android.app.ActivityThread;
21 import android.app.Application;
22 import android.content.Context;
23 import android.content.pm.ApplicationInfo;
24 import android.content.pm.PackageManager;
25 import android.content.res.CompatibilityInfo;
26 import android.graphics.Bitmap;
27 import android.graphics.BitmapFactory;
28 import android.graphics.Canvas;
29 import android.graphics.drawable.BitmapDrawable;
30 import android.graphics.drawable.Drawable;
31 import android.os.Bundle;
32 import android.util.DisplayMetrics;
33 import android.util.Log;
34 import android.view.LayoutInflater;
35 import android.view.View;
36 import android.widget.LinearLayout;
37 import android.widget.ScrollView;
38 import android.widget.TextView;
39 
40 public class DpiTestActivity extends Activity {
DpiTestActivity()41     public DpiTestActivity() {
42         super();
43         init(false);
44     }
45 
DpiTestActivity(boolean noCompat)46     public DpiTestActivity(boolean noCompat) {
47         super();
48         init(noCompat);
49     }
50 
init(boolean noCompat)51     public void init(boolean noCompat) {
52         try {
53             // This is all a dirty hack.  Don't think a real application should
54             // be doing it.
55             Application app = ActivityThread.currentActivityThread().getApplication();
56             ApplicationInfo ai = app.getPackageManager().getApplicationInfo(
57                     "com.google.android.test.dpi", 0);
58             if (noCompat) {
59                 ai.flags |= ApplicationInfo.FLAG_SUPPORTS_XLARGE_SCREENS
60                     | ApplicationInfo.FLAG_SUPPORTS_LARGE_SCREENS
61                     | ApplicationInfo.FLAG_SUPPORTS_NORMAL_SCREENS
62                     | ApplicationInfo.FLAG_SUPPORTS_SMALL_SCREENS
63                     | ApplicationInfo.FLAG_RESIZEABLE_FOR_SCREENS
64                     | ApplicationInfo.FLAG_SUPPORTS_SCREEN_DENSITIES;
65                 app.getResources().setCompatibilityInfo(new CompatibilityInfo(ai,
66                         getResources().getConfiguration().screenLayout,
67                         getResources().getConfiguration().smallestScreenWidthDp, false, 1f));
68             }
69         } catch (PackageManager.NameNotFoundException e) {
70             throw new RuntimeException("ouch", e);
71         }
72     }
73 
74     @Override
onCreate(Bundle savedInstanceState)75     protected void onCreate(Bundle savedInstanceState) {
76         super.onCreate(savedInstanceState);
77 
78         final LayoutInflater li = (LayoutInflater)getSystemService(
79                 LAYOUT_INFLATER_SERVICE);
80 
81         this.setTitle(R.string.act_title);
82         LinearLayout root = new LinearLayout(this);
83         root.setOrientation(LinearLayout.VERTICAL);
84 
85         LinearLayout layout = new LinearLayout(this);
86         addBitmapDrawable(layout, R.drawable.logo120dpi, true);
87         addBitmapDrawable(layout, R.drawable.logo160dpi, true);
88         addBitmapDrawable(layout, R.drawable.logo240dpi, true);
89         addLabelToRoot(root, "Prescaled bitmap in drawable");
90         addChildToRoot(root, layout);
91 
92         layout = new LinearLayout(this);
93         addBitmapDrawable(layout, R.drawable.logo120dpi, false);
94         addBitmapDrawable(layout, R.drawable.logo160dpi, false);
95         addBitmapDrawable(layout, R.drawable.logo240dpi, false);
96         addLabelToRoot(root, "Autoscaled bitmap in drawable");
97         addChildToRoot(root, layout);
98 
99         layout = new LinearLayout(this);
100         addResourceDrawable(layout, R.drawable.logo120dpi);
101         addResourceDrawable(layout, R.drawable.logo160dpi);
102         addResourceDrawable(layout, R.drawable.logo240dpi);
103         addLabelToRoot(root, "Prescaled resource drawable");
104         addChildToRoot(root, layout);
105 
106         layout = (LinearLayout)li.inflate(R.layout.image_views, null);
107         addLabelToRoot(root, "Inflated layout");
108         addChildToRoot(root, layout);
109 
110         layout = (LinearLayout)li.inflate(R.layout.styled_image_views, null);
111         addLabelToRoot(root, "Inflated styled layout");
112         addChildToRoot(root, layout);
113 
114         layout = new LinearLayout(this);
115         addCanvasBitmap(layout, R.drawable.logo120dpi, true);
116         addCanvasBitmap(layout, R.drawable.logo160dpi, true);
117         addCanvasBitmap(layout, R.drawable.logo240dpi, true);
118         addLabelToRoot(root, "Prescaled bitmap");
119         addChildToRoot(root, layout);
120 
121         layout = new LinearLayout(this);
122         addCanvasBitmap(layout, R.drawable.logo120dpi, false);
123         addCanvasBitmap(layout, R.drawable.logo160dpi, false);
124         addCanvasBitmap(layout, R.drawable.logo240dpi, false);
125         addLabelToRoot(root, "Autoscaled bitmap");
126         addChildToRoot(root, layout);
127 
128         layout = new LinearLayout(this);
129         addResourceDrawable(layout, R.drawable.logonodpi120);
130         addResourceDrawable(layout, R.drawable.logonodpi160);
131         addResourceDrawable(layout, R.drawable.logonodpi240);
132         addLabelToRoot(root, "No-dpi resource drawable");
133         addChildToRoot(root, layout);
134 
135         layout = new LinearLayout(this);
136         addNinePatchResourceDrawable(layout, R.drawable.smlnpatch120dpi);
137         addNinePatchResourceDrawable(layout, R.drawable.smlnpatch160dpi);
138         addNinePatchResourceDrawable(layout, R.drawable.smlnpatch240dpi);
139         addLabelToRoot(root, "Prescaled 9-patch resource drawable");
140         addChildToRoot(root, layout);
141 
142         setContentView(scrollWrap(root));
143     }
144 
scrollWrap(View view)145     private View scrollWrap(View view) {
146         ScrollView scroller = new ScrollView(this);
147         scroller.addView(view, new ScrollView.LayoutParams(ScrollView.LayoutParams.MATCH_PARENT,
148                 ScrollView.LayoutParams.MATCH_PARENT));
149         return scroller;
150     }
151 
addLabelToRoot(LinearLayout root, String text)152     private void addLabelToRoot(LinearLayout root, String text) {
153         TextView label = new TextView(this);
154         label.setText(text);
155         root.addView(label, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
156                 LinearLayout.LayoutParams.WRAP_CONTENT));
157     }
158 
addChildToRoot(LinearLayout root, LinearLayout layout)159     private void addChildToRoot(LinearLayout root, LinearLayout layout) {
160         root.addView(layout, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
161                 LinearLayout.LayoutParams.WRAP_CONTENT));
162     }
163 
addBitmapDrawable(LinearLayout layout, int resource, boolean scale)164     private void addBitmapDrawable(LinearLayout layout, int resource, boolean scale) {
165         Bitmap bitmap;
166         bitmap = loadAndPrintDpi(resource, scale);
167 
168         View view = new View(this);
169 
170         final BitmapDrawable d = new BitmapDrawable(getResources(), bitmap);
171         if (!scale) d.setTargetDensity(getResources().getDisplayMetrics());
172         view.setBackgroundDrawable(d);
173 
174         view.setLayoutParams(new LinearLayout.LayoutParams(d.getIntrinsicWidth(),
175                 d.getIntrinsicHeight()));
176         layout.addView(view);
177     }
178 
addResourceDrawable(LinearLayout layout, int resource)179     private void addResourceDrawable(LinearLayout layout, int resource) {
180         View view = new View(this);
181 
182         final Drawable d = getResources().getDrawable(resource);
183         view.setBackgroundDrawable(d);
184 
185         view.setLayoutParams(new LinearLayout.LayoutParams(d.getIntrinsicWidth(),
186                 d.getIntrinsicHeight()));
187         layout.addView(view);
188     }
189 
addCanvasBitmap(LinearLayout layout, int resource, boolean scale)190     private void addCanvasBitmap(LinearLayout layout, int resource, boolean scale) {
191         Bitmap bitmap;
192         bitmap = loadAndPrintDpi(resource, scale);
193 
194         ScaledBitmapView view = new ScaledBitmapView(this, bitmap);
195 
196         view.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
197                 LinearLayout.LayoutParams.WRAP_CONTENT));
198         layout.addView(view);
199     }
200 
addNinePatchResourceDrawable(LinearLayout layout, int resource)201     private void addNinePatchResourceDrawable(LinearLayout layout, int resource) {
202         View view = new View(this);
203 
204         final Drawable d = getResources().getDrawable(resource);
205         view.setBackgroundDrawable(d);
206 
207         Log.i("foo", "9-patch #" + Integer.toHexString(resource)
208                 + " w=" + d.getIntrinsicWidth() + " h=" + d.getIntrinsicHeight());
209         view.setLayoutParams(new LinearLayout.LayoutParams(
210                 d.getIntrinsicWidth()*2, d.getIntrinsicHeight()*2));
211         layout.addView(view);
212     }
213 
loadAndPrintDpi(int id, boolean scale)214     private Bitmap loadAndPrintDpi(int id, boolean scale) {
215         Bitmap bitmap;
216         if (scale) {
217             bitmap = BitmapFactory.decodeResource(getResources(), id);
218         } else {
219             BitmapFactory.Options opts = new BitmapFactory.Options();
220             opts.inScaled = false;
221             bitmap = BitmapFactory.decodeResource(getResources(), id, opts);
222         }
223         return bitmap;
224     }
225 
226     private class ScaledBitmapView extends View {
227         private Bitmap mBitmap;
228 
ScaledBitmapView(Context context, Bitmap bitmap)229         public ScaledBitmapView(Context context, Bitmap bitmap) {
230             super(context);
231             mBitmap = bitmap;
232         }
233 
234         @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)235         protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
236             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
237             final DisplayMetrics metrics = getResources().getDisplayMetrics();
238             setMeasuredDimension(
239                     mBitmap.getScaledWidth(metrics),
240                     mBitmap.getScaledHeight(metrics));
241         }
242 
243         @Override
onDraw(Canvas canvas)244         protected void onDraw(Canvas canvas) {
245             super.onDraw(canvas);
246 
247             canvas.drawBitmap(mBitmap, 0.0f, 0.0f, null);
248         }
249     }
250 }
251