DpiTestActivity.java revision c4db95c077f826585d20be2f3db4043c53d30cf5 
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
17package com.google.android.test.dpi;
18
19import android.app.Activity;
20import android.app.ActivityThread;
21import android.app.Application;
22import android.os.Bundle;
23import android.graphics.BitmapFactory;
24import android.graphics.Bitmap;
25import android.graphics.Canvas;
26import android.graphics.drawable.BitmapDrawable;
27import android.graphics.drawable.Drawable;
28import android.widget.LinearLayout;
29import android.widget.TextView;
30import android.widget.ScrollView;
31import android.view.View;
32import android.content.Context;
33import android.content.pm.ApplicationInfo;
34import android.content.pm.PackageManager;
35import android.content.res.CompatibilityInfo;
36import android.util.DisplayMetrics;
37
38public class DpiTestActivity extends Activity {
39    public DpiTestActivity() {
40        super();
41        init(false);
42    }
43
44    public DpiTestActivity(boolean noCompat) {
45        super();
46        init(noCompat);
47    }
48
49    public void init(boolean noCompat) {
50        try {
51            // This is all a dirty hack.  Don't think a real application should
52            // be doing it.
53            Application app = ActivityThread.currentActivityThread().getApplication();
54            ApplicationInfo ai = app.getPackageManager().getApplicationInfo(
55                    "com.google.android.test.dpi",
56                    PackageManager.GET_SUPPORTS_DENSITIES);
57            if (noCompat) {
58                ai.flags |= ApplicationInfo.FLAG_SUPPORTS_LARGE_SCREENS
59                    | ApplicationInfo.FLAG_SUPPORTS_NORMAL_SCREENS
60                    | ApplicationInfo.FLAG_SUPPORTS_SMALL_SCREENS
61                    | ApplicationInfo.FLAG_RESIZEABLE_FOR_SCREENS;
62                ai.supportsDensities = new int[] { ApplicationInfo.ANY_DENSITY };
63                app.getResources().setCompatibilityInfo(new CompatibilityInfo(ai));
64            }
65        } catch (PackageManager.NameNotFoundException e) {
66            throw new RuntimeException("ouch", e);
67        }
68    }
69
70    @Override
71    protected void onCreate(Bundle savedInstanceState) {
72        super.onCreate(savedInstanceState);
73
74        this.setTitle(R.string.act_title);
75        LinearLayout root = new LinearLayout(this);
76        root.setOrientation(LinearLayout.VERTICAL);
77
78        LinearLayout layout = new LinearLayout(this);
79        addBitmapDrawable(layout, R.drawable.logo120dpi, true);
80        addBitmapDrawable(layout, R.drawable.logo160dpi, true);
81        addBitmapDrawable(layout, R.drawable.logo240dpi, true);
82        addLabelToRoot(root, "Prescaled bitmap in drawable");
83        addChildToRoot(root, layout);
84
85        layout = new LinearLayout(this);
86        addBitmapDrawable(layout, R.drawable.logo120dpi, false);
87        addBitmapDrawable(layout, R.drawable.logo160dpi, false);
88        addBitmapDrawable(layout, R.drawable.logo240dpi, false);
89        addLabelToRoot(root, "Autoscaled bitmap in drawable");
90        addChildToRoot(root, layout);
91
92        layout = new LinearLayout(this);
93        addResourceDrawable(layout, R.drawable.logo120dpi);
94        addResourceDrawable(layout, R.drawable.logo160dpi);
95        addResourceDrawable(layout, R.drawable.logo240dpi);
96        addLabelToRoot(root, "Prescaled resource drawable");
97        addChildToRoot(root, layout);
98
99        layout = new LinearLayout(this);
100        addCanvasBitmap(layout, R.drawable.logo120dpi, true);
101        addCanvasBitmap(layout, R.drawable.logo160dpi, true);
102        addCanvasBitmap(layout, R.drawable.logo240dpi, true);
103        addLabelToRoot(root, "Prescaled bitmap");
104        addChildToRoot(root, layout);
105
106        layout = new LinearLayout(this);
107        addCanvasBitmap(layout, R.drawable.logo120dpi, false);
108        addCanvasBitmap(layout, R.drawable.logo160dpi, false);
109        addCanvasBitmap(layout, R.drawable.logo240dpi, false);
110        addLabelToRoot(root, "Autoscaled bitmap");
111        addChildToRoot(root, layout);
112
113        layout = new LinearLayout(this);
114        addResourceDrawable(layout, R.drawable.logonodpi120);
115        addResourceDrawable(layout, R.drawable.logonodpi160);
116        addResourceDrawable(layout, R.drawable.logonodpi240);
117        addLabelToRoot(root, "No-dpi resource drawable");
118        addChildToRoot(root, layout);
119
120        setContentView(scrollWrap(root));
121    }
122
123    private View scrollWrap(View view) {
124        ScrollView scroller = new ScrollView(this);
125        scroller.addView(view, new ScrollView.LayoutParams(ScrollView.LayoutParams.FILL_PARENT,
126                ScrollView.LayoutParams.FILL_PARENT));
127        return scroller;
128    }
129
130    private void addLabelToRoot(LinearLayout root, String text) {
131        TextView label = new TextView(this);
132        label.setText(text);
133        root.addView(label, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,
134                LinearLayout.LayoutParams.WRAP_CONTENT));
135    }
136
137    private void addChildToRoot(LinearLayout root, LinearLayout layout) {
138        root.addView(layout, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,
139                LinearLayout.LayoutParams.WRAP_CONTENT));
140    }
141
142    private void addBitmapDrawable(LinearLayout layout, int resource, boolean scale) {
143        Bitmap bitmap;
144        bitmap = loadAndPrintDpi(resource, scale);
145
146        View view = new View(this);
147
148        final BitmapDrawable d = new BitmapDrawable(bitmap);
149        if (!scale) d.setDensityScale(getResources().getDisplayMetrics());
150        view.setBackgroundDrawable(d);
151
152        view.setLayoutParams(new LinearLayout.LayoutParams(d.getIntrinsicWidth(),
153                d.getIntrinsicHeight()));
154        layout.addView(view);
155    }
156
157    private void addResourceDrawable(LinearLayout layout, int resource) {
158        View view = new View(this);
159
160        final Drawable d = getResources().getDrawable(resource);
161        view.setBackgroundDrawable(d);
162
163        view.setLayoutParams(new LinearLayout.LayoutParams(d.getIntrinsicWidth(),
164                d.getIntrinsicHeight()));
165        layout.addView(view);
166    }
167
168    private void addCanvasBitmap(LinearLayout layout, int resource, boolean scale) {
169        Bitmap bitmap;
170        bitmap = loadAndPrintDpi(resource, scale);
171
172        ScaledBitmapView view = new ScaledBitmapView(this, bitmap);
173
174        view.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
175                LinearLayout.LayoutParams.WRAP_CONTENT));
176        layout.addView(view);
177    }
178
179    private Bitmap loadAndPrintDpi(int id, boolean scale) {
180        Bitmap bitmap;
181        if (scale) {
182            bitmap = BitmapFactory.decodeResource(getResources(), id);
183        } else {
184            BitmapFactory.Options opts = new BitmapFactory.Options();
185            opts.inScaled = false;
186            bitmap = BitmapFactory.decodeResource(getResources(), id, opts);
187        }
188        return bitmap;
189    }
190
191    private class ScaledBitmapView extends View {
192        private Bitmap mBitmap;
193
194        public ScaledBitmapView(Context context, Bitmap bitmap) {
195            super(context);
196            mBitmap = bitmap;
197        }
198
199        @Override
200        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
201            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
202            final DisplayMetrics metrics = getResources().getDisplayMetrics();
203            setMeasuredDimension(
204                    mBitmap.getScaledWidth(metrics),
205                    mBitmap.getScaledHeight(metrics));
206        }
207
208        @Override
209        protected void onDraw(Canvas canvas) {
210            super.onDraw(canvas);
211
212            canvas.drawBitmap(mBitmap, 0.0f, 0.0f, null);
213        }
214    }
215}
216