java - 为 1.5 开发的应用程序不能在 2.2 android 上运行

Question

我从在线教程中得到了查看大图的代码。它适用于 1.5，但是当我使用 Android 2.2 库时它不起作用。 (我的应用程序使用 2.2)我已经搜索了这个问题的答案，但没有运气。我怀疑这可能与可绘制文件夹有关？图像加载，但无法执行缩放或移动图像等操作。

 private void updateDisplay(){
    calculateSourceRect(current_centerX, current_centerY, current_scale);
    //where  sourceRect = new RectF(); and  destinationRect = new RectF();
    matrix.setRectToRect(sourceRect, destinationRect, Matrix.ScaleToFit.FILL);
    androidBigImageView.setImageMatrix(matrix);
}

private void calculateSourceRect(int centerX, int centerY, float scale){
    int xSubValue;
    int ySubValue;

    if(destinationRect.bottom >= destinationRect.right){
        ySubValue = (int)((imageSizeY/2) / scale);
        xSubValue = ySubValue;

        xSubValue = (int) (xSubValue * ((float)androidBigImageView.getWidth() / (float)androidBigImageView.getHeight()));
    }
    else{
        xSubValue = (int)((imageSizeX/2) / scale);
        ySubValue = xSubValue;

        ySubValue = (int) (ySubValue * ((float)androidBigImageView.getHeight() / (float)androidBigImageView.getWidth()));
    }

    if(centerX - xSubValue < 0) {
        animation.stopProcess();
        centerX = xSubValue;
    }
    if(centerY - ySubValue < 0) {
        animation.stopProcess();
        centerY = ySubValue;
    }
    if(centerX + xSubValue >= imageSizeX) {
        animation.stopProcess();
        centerX = imageSizeX - xSubValue - 1;
    }
    if(centerY + ySubValue >= imageSizeY) {
        animation.stopProcess();
        centerY = imageSizeY - ySubValue - 1;
    }

    current_centerX = centerX;
    current_centerY = centerY;

    sourceRect.set(centerX - xSubValue, centerY - ySubValue, centerX + xSubValue, centerY + ySubValue);
}

Answer 1

试试 androidBigImageView.setScaleType(ScaleType.MATRIX);