加载使用相机拍摄的图像时内存不足

Question

我正在加载图像缩放至屏幕尺寸，之后用户可以用手在其上绘制文本。

之后，用户可以将其保存到SD卡。我需要将其保存为与原始图像相同的宽度和高度。对于其他示例图像，它工作正常。但是，当我加载相机捕获的图像，一旦我画了一些东西。我尝试将图像缩放回原始的高度和宽度，但是对于由相机捕获的所有图像，它会给出例外“内存不足例外”。代码如下：

private void saveView(View view) { 
     Bitmap b = Bitmap.createBitmap(view.getWidth(), view.getHeight(), 
       Bitmap.Config.ARGB_8888); 
     String filePath="/sdcard/"; 
     Canvas c = new Canvas(b); 


     view.draw(c); 
     float scaleHeight=((float)getHeight()/b.getHeight()); 
     float scaleWidth=((float)getWidth()/b.getWidth()); 
     Matrix matrix=new Matrix(); 
     matrix.postScale(scaleWidth, scaleHeight); 
     Log.e("getWidth()", ":"+getWidth()); 
     Log.e("getHeight()", ":"+getHeight()); 

       **//Giving Exception at below Line as i am trying to scat it to origenal size. 
     b=Bitmap.createBitmap(b,0,0,b.getWidth(),b.getHeight(),matrix,true);** 

Answer 1

你需要如下调整你的位图+

Bitmap resizedBitmap = getResizedBitmap(myBitmap, 150, 150); 

和方法

public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) { 
    int width = bm.getWidth(); 
    int height = bm.getHeight(); 
    float scaleWidth = ((float) newWidth)/width; 
    float scaleHeight = ((float) newHeight)/height; 

    // create a matrix for the manipulation 
    Matrix matrix = new Matrix(); 
    // resize the bit map 
    matrix.postScale(scaleWidth, scaleHeight); 
    // recreate the new Bitmap 
    Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, 
        matrix, false); 
    return resizedBitmap; 
}