如何僅將一個圖像的縮略圖放入ImageView中？

Question

我在用於測試的設備的SD卡上有一個Foto。 路徑：

Uri selectedImageUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory()+"/test/test/test1.jpg")); 

（是的，媒體鏈接文件上exsits Micro-SD卡）

我已經成功地得到Micro-SD卡的所有圖像的縮略圖，但我只想要這個特定的一。

如何存檔？

Answer 1

這裏是創建縮略圖代碼：

public static Bitmap decodeSampledBitmapFromFile(String path, 
    int reqWidth, int reqHeight) { // BEST QUALITY MATCH 

// First decode with inJustDecodeBounds=true to check dimensions 
final BitmapFactory.Options options = new BitmapFactory.Options(); 
options.inJustDecodeBounds = true; 
BitmapFactory.decodeFile(path, options); 

// Calculate inSampleSize 
    // Raw height and width of image 
    final int height = options.outHeight; 
    final int width = options.outWidth; 
    options.inPreferredConfig = Bitmap.Config.RGB_565; 
    int inSampleSize = 1; 

    if (height > reqHeight) { 
     inSampleSize = Math.round((float)height/(float)reqHeight); 
    } 

    int expectedWidth = width/inSampleSize; 

    if (expectedWidth > reqWidth) { 
     //if(Math.round((float)width/(float)reqWidth) > inSampleSize) // If bigger SampSize.. 
     inSampleSize = Math.round((float)width/(float)reqWidth); 
    } 


options.inSampleSize = inSampleSize; 

// Decode bitmap with inSampleSize set 
options.inJustDecodeBounds = false; 

return BitmapFactory.decodeFile(path, options); 
}