使用Surface View来显示图片
public class YUVImageView extends SurfaceView {
private static final String TAG = "YUVImageView";
private SurfaceHolder surfaceHolder;
private Paint paint;
private Rect srcRect, destRect;
private Canvas canvas;
private Bitmap bitmap;
private BitmapFactory.Options options;
private SurfaceHolder.Callback callback = new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
};
public YUVImageView(Context context) {
this(context, null);
}
public YUVImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public YUVImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView();
}
private void initView() {
surfaceHolder = getHolder();
surfaceHolder.setFixedSize(640, 480);
surfaceHolder.addCallback(callback);
setZOrderOnTop(true);
setZOrderMediaOverlay(true);
paint = new Paint();
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
srcRect = new Rect(0, 0, 640, 480);
destRect = new Rect(0, 0, 640, 480);
options = new BitmapFactory.Options();
}
public void drawBitmap(int id){
if (surfaceHolder != null) {
canvas = surfaceHolder.lockCanvas();
}
if (surfaceHolder != null && canvas != null) {
try {
canvas.drawColor(Color.WHITE);
bitmap = BitmapFactory.decodeResource(getResources(),id);
if (bitmap != null) {
canvas.drawBitmap(bitmap, srcRect, destRect, paint);
} else {
LogUtils.d(TAG, "create bitmap from yuvData array failed");
}
} catch (Exception e) {
e.printStackTrace();
LogUtils.e(TAG, "drawYUV error ", e);
} finally {
if (canvas != null && surfaceHolder != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
if (bitmap != null) {
bitmap.recycle();
}
}
}
}
public void drawYUV(byte[] yuvData) {
if (surfaceHolder != null) {
canvas = surfaceHolder.lockCanvas();
}
if (surfaceHolder != null && canvas != null) {
try {
canvas.drawColor(Color.WHITE);
bitmap = BitmapFactory.decodeByteArray(yuvData, 0, yuvData.length, options);
if (bitmap != null) {
canvas.drawBitmap(bitmap, srcRect, destRect, paint);
} else {
LogUtils.d(TAG, "create bitmap from yuvData array failed");
}
} catch (Exception e) {
e.printStackTrace();
LogUtils.e(TAG, "drawYUV error ", e);
} finally {
if (canvas != null && surfaceHolder != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
if (bitmap != null) {
bitmap.recycle();
}
}
}
}
}