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1 /*
2  * Copyright (C) 2010 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.android.test.hwui;
18 
19 import android.app.Activity;
20 import android.content.Context;
21 import android.graphics.Bitmap;
22 import android.graphics.BitmapFactory;
23 import android.graphics.BitmapShader;
24 import android.graphics.Canvas;
25 import android.graphics.LinearGradient;
26 import android.graphics.RadialGradient;
27 import android.graphics.Matrix;
28 import android.graphics.Paint;
29 import android.graphics.Shader;
30 import android.graphics.SweepGradient;
31 import android.os.Bundle;
32 import android.view.Gravity;
33 import android.view.View;
34 import android.widget.FrameLayout;
35 import android.widget.SeekBar;
36 
37 @SuppressWarnings({"UnusedDeclaration"})
38 public class GradientsActivity extends Activity {
39     @Override
onCreate(Bundle savedInstanceState)40     protected void onCreate(Bundle savedInstanceState) {
41         super.onCreate(savedInstanceState);
42 
43         final FrameLayout layout = new FrameLayout(this);
44 
45         final ShadersView shadersView = new ShadersView(this);
46         final GradientView gradientView = new GradientView(this);
47         final RadialGradientView radialGradientView = new RadialGradientView(this);
48         final SweepGradientView sweepGradientView = new SweepGradientView(this);
49         final BitmapView bitmapView = new BitmapView(this);
50 
51         final SeekBar rotateView = new SeekBar(this);
52         rotateView.setMax(360);
53         rotateView.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
54             public void onStopTrackingTouch(SeekBar seekBar) {
55             }
56 
57             public void onStartTrackingTouch(SeekBar seekBar) {
58             }
59 
60             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
61                 gradientView.setRotationY((float) progress);
62                 radialGradientView.setRotationX((float) progress);
63                 sweepGradientView.setRotationY((float) progress);
64                 bitmapView.setRotationX((float) progress);
65             }
66         });
67 
68         layout.addView(shadersView);
69         layout.addView(gradientView, new FrameLayout.LayoutParams(
70                 200, 200, Gravity.CENTER));
71 
72         FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(200, 200, Gravity.CENTER);
73         lp.setMargins(220, 0, 0, 0);
74         layout.addView(radialGradientView, lp);
75 
76         lp = new FrameLayout.LayoutParams(200, 200, Gravity.CENTER);
77         lp.setMargins(440, 0, 0, 0);
78         layout.addView(sweepGradientView, lp);
79 
80         lp = new FrameLayout.LayoutParams(200, 200, Gravity.CENTER);
81         lp.setMargins(220, -220, 0, 0);
82         layout.addView(bitmapView, lp);
83 
84         layout.addView(rotateView, new FrameLayout.LayoutParams(
85                 300, FrameLayout.LayoutParams.WRAP_CONTENT,
86                 Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM));
87 
88         setContentView(layout);
89     }
90 
91     static class BitmapView extends View {
92         private final Paint mPaint;
93 
BitmapView(Context c)94         BitmapView(Context c) {
95             super(c);
96 
97             Bitmap texture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
98             BitmapShader shader = new BitmapShader(texture, Shader.TileMode.REPEAT,
99                     Shader.TileMode.REPEAT);
100             mPaint = new Paint();
101             mPaint.setShader(shader);
102         }
103 
104         @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)105         protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
106             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
107             setMeasuredDimension(200, 200);
108         }
109 
110         @Override
onDraw(Canvas canvas)111         protected void onDraw(Canvas canvas) {
112             super.onDraw(canvas);
113             canvas.drawRect(0.0f, 0.0f, getWidth(), getHeight(), mPaint);
114         }
115     }
116 
117     static class GradientView extends View {
118         private final Paint mPaint;
119 
GradientView(Context c)120         GradientView(Context c) {
121             super(c);
122 
123             LinearGradient gradient = new LinearGradient(0, 0, 200, 0, 0xFF000000, 0,
124                     Shader.TileMode.CLAMP);
125             mPaint = new Paint();
126             mPaint.setShader(gradient);
127         }
128 
129         @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)130         protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
131             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
132             setMeasuredDimension(200, 200);
133         }
134 
135         @Override
onDraw(Canvas canvas)136         protected void onDraw(Canvas canvas) {
137             super.onDraw(canvas);
138             canvas.drawRect(0.0f, 0.0f, getWidth(), getHeight(), mPaint);
139         }
140     }
141 
142     static class RadialGradientView extends View {
143         private final Paint mPaint;
144 
RadialGradientView(Context c)145         RadialGradientView(Context c) {
146             super(c);
147 
148             RadialGradient gradient = new RadialGradient(0.0f, 0.0f, 100.0f, 0xff000000, 0xffffffff,
149                     Shader.TileMode.MIRROR);
150             mPaint = new Paint();
151             mPaint.setShader(gradient);
152         }
153 
154         @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)155         protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
156             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
157             setMeasuredDimension(200, 200);
158         }
159 
160         @Override
onDraw(Canvas canvas)161         protected void onDraw(Canvas canvas) {
162             super.onDraw(canvas);
163             canvas.drawRect(0.0f, 0.0f, getWidth(), getHeight(), mPaint);
164         }
165     }
166 
167     static class SweepGradientView extends View {
168         private final Paint mPaint;
169 
SweepGradientView(Context c)170         SweepGradientView(Context c) {
171             super(c);
172 
173             SweepGradient gradient = new SweepGradient(100.0f, 100.0f, 0xff000000, 0xffffffff);
174             mPaint = new Paint();
175             mPaint.setShader(gradient);
176         }
177 
178         @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)179         protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
180             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
181             setMeasuredDimension(200, 200);
182         }
183 
184         @Override
onDraw(Canvas canvas)185         protected void onDraw(Canvas canvas) {
186             super.onDraw(canvas);
187             canvas.drawRect(0.0f, 0.0f, getWidth(), getHeight(), mPaint);
188         }
189     }
190 
191     static class ShadersView extends View {
192         private final Paint mPaint;
193         private final float mDrawWidth;
194         private final float mDrawHeight;
195         private final LinearGradient mGradient;
196         private final LinearGradient mGradientStops;
197         private final Matrix mMatrix;
198 
ShadersView(Context c)199         ShadersView(Context c) {
200             super(c);
201 
202             mDrawWidth = 200;
203             mDrawHeight = 200;
204 
205             mGradient = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP);
206             mGradientStops = new LinearGradient(0, 0, 0, 1,
207                     new int[] { 0xFFFF0000, 0xFF00FF00, 0xFF0000FF }, null, Shader.TileMode.CLAMP);
208 
209             mMatrix = new Matrix();
210 
211             mPaint = new Paint();
212         }
213 
214         @Override
onDraw(Canvas canvas)215         protected void onDraw(Canvas canvas) {
216             super.onDraw(canvas);
217             canvas.drawRGB(255, 255, 255);
218 
219             // Gradients
220             canvas.save();
221             float top = 40.0f;
222             float right = 40.0f + mDrawWidth;
223             float left = 40.0f;
224             float bottom = 40.0f + mDrawHeight;
225 
226             mPaint.setShader(mGradient);
227 
228             mMatrix.setScale(1, mDrawWidth);
229             mMatrix.postRotate(90);
230             mMatrix.postTranslate(right, top);
231             mGradient.setLocalMatrix(mMatrix);
232             canvas.drawRect(right - mDrawWidth, top, right, top + mDrawHeight, mPaint);
233 
234             top += 40.0f + mDrawHeight;
235             bottom += 40.0f + mDrawHeight;
236 
237             mMatrix.setScale(1, mDrawHeight);
238             mMatrix.postTranslate(left, top);
239             mGradient.setLocalMatrix(mMatrix);
240             canvas.drawRect(left, top, right, top + mDrawHeight, mPaint);
241 
242             left += 40.0f + mDrawWidth;
243             right += 40.0f + mDrawWidth;
244             top -= 40.0f + mDrawHeight;
245             bottom -= 40.0f + mDrawHeight;
246 
247             mMatrix.setScale(1, mDrawHeight);
248             mMatrix.postRotate(180);
249             mMatrix.postTranslate(left, bottom);
250             mGradient.setLocalMatrix(mMatrix);
251             canvas.drawRect(left, bottom - mDrawHeight, right, bottom, mPaint);
252 
253             top += 40.0f + mDrawHeight;
254             bottom += 40.0f + mDrawHeight;
255 
256             mMatrix.setScale(1, mDrawWidth);
257             mMatrix.postRotate(-90);
258             mMatrix.postTranslate(left, top);
259             mGradient.setLocalMatrix(mMatrix);
260             canvas.drawRect(left, top, left + mDrawWidth, bottom, mPaint);
261 
262             right = left + mDrawWidth;
263             left = 40.0f;
264             top = bottom + 20.0f;
265             bottom = top + 50.0f;
266 
267             mPaint.setShader(mGradientStops);
268 
269             mMatrix.setScale(1, mDrawWidth);
270             mMatrix.postRotate(90);
271             mMatrix.postTranslate(right, top);
272             mGradientStops.setLocalMatrix(mMatrix);
273             canvas.drawRect(left, top, right, bottom, mPaint);
274 
275             canvas.restore();
276         }
277     }
278 }
279