1 /*
2  * Copyright (C) 2012 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.Canvas;
22 import android.graphics.Color;
23 import android.graphics.LinearGradient;
24 import android.graphics.Paint;
25 import android.graphics.Shader;
26 import android.os.Bundle;
27 import android.view.View;
28 
29 @SuppressWarnings("UnusedDeclaration")
30 public class GradientStopsActivity extends Activity {
31     @Override
onCreate(Bundle savedInstanceState)32     protected void onCreate(Bundle savedInstanceState) {
33         super.onCreate(savedInstanceState);
34 
35         setContentView(new GradientView(this));
36     }
37 
38     private class GradientView extends View {
GradientView(Context context)39         public GradientView(Context context) {
40             super(context);
41         }
42 
43         @Override
onDraw(Canvas canvas)44         protected void onDraw(Canvas canvas) {
45             int[] colors = new int[] { 0xffff0000, 0xff0000ff };
46             float[] positions = new float[] { 0.3f, 0.6f };
47             LinearGradient gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
48                     colors, positions, Shader.TileMode.CLAMP);
49 
50             Paint paint = new Paint();
51             paint.setShader(gradient);
52 
53             canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
54 
55             colors = new int[] { 0xffff0000, 0xff0000ff, 0xff00ff00 };
56             positions = new float[] { 0.3f, 0.6f, 1.0f };
57             gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
58                     colors, positions, Shader.TileMode.CLAMP);
59 
60             paint.setShader(gradient);
61 
62             canvas.translate(0.0f, 75.0f);
63             canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
64 
65             colors = new int[] { 0xffff0000, 0xff0000ff, 0xff00ff00 };
66             positions = new float[] { 0.0f, 0.3f, 0.6f };
67             gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
68                     colors, positions, Shader.TileMode.CLAMP);
69 
70             paint.setShader(gradient);
71 
72             canvas.translate(0.0f, 75.0f);
73             canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
74 
75             colors = new int[] { 0xff000000, 0xffffffff };
76             gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
77                     colors, null, Shader.TileMode.CLAMP);
78 
79             paint.setShader(gradient);
80 
81             canvas.translate(0.0f, 75.0f);
82             canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
83 
84             gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
85                     colors, null, Shader.TileMode.REPEAT);
86 
87             paint.setShader(gradient);
88 
89             canvas.translate(0.0f, 75.0f);
90             canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
91 
92             gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
93                     colors, null, Shader.TileMode.MIRROR);
94 
95             paint.setShader(gradient);
96 
97             canvas.translate(0.0f, 75.0f);
98             canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
99 
100             gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
101                     colors, null, Shader.TileMode.CLAMP);
102 
103             paint.setShader(gradient);
104 
105             canvas.translate(0.0f, 75.0f);
106             canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
107 
108             gradient = new LinearGradient(0.0f, 0.0f, 768.0f, 0.0f,
109                     colors, null, Shader.TileMode.CLAMP);
110 
111             paint.setShader(gradient);
112 
113             canvas.translate(0.0f, 75.0f);
114             canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
115 
116             gradient = new LinearGradient(0.0f, 0.0f, 512.0f, 0.0f,
117                     colors, null, Shader.TileMode.CLAMP);
118 
119             paint.setShader(gradient);
120 
121             canvas.translate(0.0f, 75.0f);
122             canvas.drawRect(0.0f, 0.0f, 512.0f, 50.0f, paint);
123         }
124     }
125 }
126