Android 的 SurfaceView 雙緩沖應(yīng)用
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075 int index = 0;
本文引用地址：http://butianyuan.cn/article/201610/305442.htm076 try {
077 index = field.getInt(R.drawable.class);
078 } catch (IllegalArgumentException e) {
079 // TODO Auto-generated catch block
080 e.printStackTrace();
081 } catch (IllegalAccessException e) {
082 // TODO Auto-generated catch block
083 e.printStackTrace();
084 }
085 // 保存圖片ID
086 imgList.add(index);
087 }
088 }
089 // 取得圖像大小
090 Bitmap bmImg = BitmapFactory.decodeResource(getResources(),
091 imgList.get(0));
092 imgWidth = bmImg.getWidth();
093 imgHeight = bmImg.getHeight();
094 }
095
096 @Override
097 public void surfaceDestroyed(SurfaceHolder holder) {
098 Log.i(Surface:, Destroy);
099
100 }
101
102 }
103
104 /**
105 * 讀取并顯示圖片的線程
106 */
107 class Load_DrawImage extends Thread {
108 int x, y;
109 int imgIndex = 0;
110
111 public Load_DrawImage(int x, int y) {
112 this.x = x;
113 this.y = y;
114 }
115
116 public void run() {
117 while (true) {
118 Canvas c = sfh.lockCanvas(new Rect(this.x, this.y, this.x
119 + imgWidth, this.y + imgHeight));
120 Bitmap bmImg = BitmapFactory.decodeResource(getResources(),
121 imgList.get(imgIndex));
122 c.drawBitmap(bmImg, this.x, this.y, new Paint());
123 imgIndex++;
124 if (imgIndex == imgList.size())
125 imgIndex = 0;
126
127 sfh.unlockCanvasAndPost(c);// 更新屏幕顯示內(nèi)容
128 }
129 }
130 };
131
132 /**
133 * 只負責(zé)繪圖的線程
134 */
135 class DrawImage extends Thread {
136 int x, y;
137
138 public DrawImage(int x, int y) {
139 this.x = x;
140 this.y = y;
141 }
142
143 public void run() {
144 while (true) {
145 if (bitmap != null) {//如果圖像有效
146 Canvas c = sfh.lockCanvas(new Rect(this.x, this.y, this.x
147 + imgWidth, this.y + imgHeight));
148
149 c.drawBitmap(bitmap, this.x, this.y, new Paint());
150
151 sfh.unlockCanvasAndPost(c);// 更新屏幕顯示內(nèi)容
152 }
153 }
154 }
155 };
156
157 /**
158 * 只負責(zé)讀取圖片的線程
159 */
160 class LoadImage extends Thread {
161 int imgIndex = 0;
162
163 public void run() {
164 while (true) {
165 bitmap = BitmapFactory.decodeResource(getResources(),
166 imgList.get(imgIndex));
167 imgIndex++;
168 if (imgIndex == imgList.size())//如果到盡頭則重新讀取
169 imgIndex = 0;
170 }
171 }
172 };
173}
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