HardwareCanvasSurfaceViewActivity.java revision bb2d0cc7e1d487f7021b1f9ec0c6740e41b535f2 
1/*
2 * Copyright (C) 2014 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.android.test.hwui;
18
19import android.app.Activity;
20import android.graphics.Canvas;
21import android.graphics.Paint;
22import android.graphics.PorterDuff;
23import android.os.Bundle;
24import android.view.Gravity;
25import android.view.Surface;
26import android.view.SurfaceHolder;
27import android.view.SurfaceHolder.Callback;
28import android.view.SurfaceView;
29import android.widget.FrameLayout;
30
31@SuppressWarnings({"UnusedDeclaration"})
32public class HardwareCanvasSurfaceViewActivity extends Activity implements Callback {
33    private SurfaceView mSurfaceView;
34    private HardwareCanvasSurfaceViewActivity.RenderingThread mThread;
35
36    @Override
37    protected void onCreate(Bundle savedInstanceState) {
38        super.onCreate(savedInstanceState);
39
40        FrameLayout content = new FrameLayout(this);
41
42        mSurfaceView = new SurfaceView(this);
43        mSurfaceView.getHolder().addCallback(this);
44
45        content.addView(mSurfaceView, new FrameLayout.LayoutParams(
46                FrameLayout.LayoutParams.MATCH_PARENT,
47                FrameLayout.LayoutParams.MATCH_PARENT,
48                Gravity.CENTER));
49        setContentView(content);
50    }
51
52    @Override
53    public void surfaceCreated(SurfaceHolder holder) {
54        mThread = new RenderingThread(holder.getSurface());
55        mThread.start();
56    }
57
58    @Override
59    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
60        mThread.setSize(width, height);
61    }
62
63    @Override
64    public void surfaceDestroyed(SurfaceHolder holder) {
65        if (mThread != null) mThread.stopRendering();
66    }
67
68    private static class RenderingThread extends Thread {
69        private final Surface mSurface;
70        private volatile boolean mRunning = true;
71        private int mWidth, mHeight;
72
73        public RenderingThread(Surface surface) {
74            mSurface = surface;
75        }
76
77        void setSize(int width, int height) {
78            mWidth = width;
79            mHeight = height;
80        }
81
82        @Override
83        public void run() {
84            float x = 0.0f;
85            float y = 0.0f;
86            float speedX = 5.0f;
87            float speedY = 3.0f;
88
89            Paint paint = new Paint();
90            paint.setColor(0xff00ff00);
91
92            while (mRunning && !Thread.interrupted()) {
93                final Canvas canvas = mSurface.lockHardwareCanvas();
94                try {
95                    canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR);
96                    canvas.drawRect(x, y, x + 20.0f, y + 20.0f, paint);
97                } finally {
98                    mSurface.unlockCanvasAndPost(canvas);
99                }
100
101                if (x + 20.0f + speedX >= mWidth || x + speedX <= 0.0f) {
102                    speedX = -speedX;
103                }
104                if (y + 20.0f + speedY >= mHeight || y + speedY <= 0.0f) {
105                    speedY = -speedY;
106                }
107
108                x += speedX;
109                y += speedY;
110
111                try {
112                    Thread.sleep(15);
113                } catch (InterruptedException e) {
114                    // Interrupted
115                }
116            }
117        }
118
119        void stopRendering() {
120            interrupt();
121            mRunning = false;
122        }
123    }
124}
125