16

我正在使用浏览按钮获取图像的文件路径....之后我想使用文件路径将此图像设置为图像视图

4

4 回答 4

41

如果File你的意思是一个File对象，我会尝试：

File file = ....
Uri uri = Uri.fromFile(file);
imageView.setImageURI(uri);
于 2013-04-04T14:56:12.230 回答
9

你可以试试这段代码：

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

BitmapFactory 会将给定的图像文件解码为 Bitmap 对象，然后将其设置到 imageView 对象中。

于 2013-04-04T14:57:54.083 回答
8

要从文件中设置图像，您需要执行以下操作：

 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));

什么时候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.

于 2013-04-04T15:00:32.100 回答
2

要从文件加载图像：

Bitmap bitmap = BitmapFactory.decodeFile(pathToPicture);

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

ImageView imageView = (ImageView) getActivity().findViewById(R.id.imageView);
imageView.setImageBitmap(BitmapFactory.decodeFile(pathToPicture));
于 2017-01-03T05:52:24.350 回答