如何在android中使用filepath将图像设置为imageView

Question

我通过使用浏览按钮....获得图像的文件路径之后，我想使用文件路径

Answer 1

如果File是指File对象，我会尝试:

File file = ....
Uri uri = Uri.fromFile(file);
imageView.setImageURI(uri);

Answer 2

你可以试试下面的代码:

imageView.setImageBitmap(BitmapFactory.decodeFile(yourFilePath));

BitmapFactory将给定的图像文件解码为位图对象，然后将其设置为imageView对象。

Answer 3

要从文件中设置图像，您需要这样做:

 File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg"); //your image file path
 mImage = (ImageView) findViewById(R.id.imageView1);
 mImage.setImageBitmap(decodeSampledBitmapFromFile(file.getAbsolutePath(), 500, 250));

当decodeSampledBitmapFromFile:

    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);
  }

您可以使用数字(在本例中为500和250)来更改ImageView的位图质量。

Answer 4

从文件中加载图像:

Bitmap bitmap = BitmapFactory.decodeFile(pathToPicture);

假设您的pathToPicture是正确的，然后您可以将此位图图像添加到ImageView中，如

ImageView imageView = (ImageView) getActivity().findViewById(R.id.imageView);
imageView.setImageBitmap(BitmapFactory.decodeFile(pathToPicture));