是否有可能通过点击按钮来调整图像编程？

Question

我最初显示一个空的视图。当我点击“添加图像”按钮时，它会在网格中显示一组图像，然后点击图像。我通过使用拖动图层动态添加ImageView来将图像放置在视图中。通过这种方式，我添加了更多图像。现在我想以编程方式调整每个图像的大小。可能吗？如果可能，请提供代码。

Answer 1

您可以使用下面的代码来调整图像大小。如果你知道图片的路径和所需的宽度和高度

public static Bitmap resizeBitMapImage1(String filePath, int targetWidth, 
      int targetHeight) { 
     Bitmap bitMapImage = null; 
     // First, get the dimensions of the image 
     Options options = new Options(); 
     options.inJustDecodeBounds = true; 
     BitmapFactory.decodeFile(filePath, options); 
     double sampleSize = 0; 
     // Only scale if we need to 
     // (16384 buffer for img processing) 
     Boolean scaleByHeight = Math.abs(options.outHeight - targetHeight) >= Math 
       .abs(options.outWidth - targetWidth); 

     if (options.outHeight * options.outWidth * 2 >= 1638) { 
      // Load, scaling to smallest power of 2 that'll get it <= desired 
      // dimensions 
      sampleSize = scaleByHeight ? options.outHeight/targetHeight 
        : options.outWidth/targetWidth; 
      sampleSize = (int) Math.pow(2d, 
        Math.floor(Math.log(sampleSize)/Math.log(2d))); 
     } 

     // Do the actual decoding 
     options.inJustDecodeBounds = false; 
     options.inTempStorage = new byte[128]; 
     while (true) { 
      try { 
       options.inSampleSize = (int) sampleSize; 
       bitMapImage = BitmapFactory.decodeFile(filePath, options); 

       break; 
      } catch (Exception ex) { 
       try { 
        sampleSize = sampleSize * 2; 
       } catch (Exception ex1) { 

       } 
      } 
     } 

     return bitMapImage; 
    } 

感谢 迪帕克