我无法在 android 的取景器图像中设置图像

Question

我正在尝试在 viewHolder imageview 中设置图像，我在 Adapter 中发送图像路径我无法在 imageview 中设置因为我已经转换为空值，我无法转换为位图的文件路径，请帮助我.

    if(dataModel.getPhoto()!=null)
            {
                BitmapFactory.Options options = new BitmapFactory.Options();
                Bitmap bm = BitmapFactory.decodeFile(dataModel.getPhoto(), options);
                Log.e("decodefile",":"+bm);
                viewHolder.photo.setImageBitmap(bm);

            }

Answer 1

你能分享更多细节吗？

可能是你的路径是incorrect.Are你使用图像的绝对路径？如果您不使用它，请将其更改为 绝对路径.

Answer 2

您没有正确使用 BitmapFactory.Options 试试这个：-

public static Bitmap decodeBitmapFromFile(String filePath, int reqWidth,
        int reqHeight) {
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(filePath, options);
    options.inSampleSize = calculateInSampleSize(options, reqWidth,
            reqHeight);
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeFile(filePath, options);
}

public static int calculateInSampleSize(BitmapFactory.Options options,
        int reqWidth, int reqHeight) {
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;
    if (height > reqHeight || width > reqWidth) {
        final int heightRatio = Math.round((float) height
                / (float) reqHeight);
        final int widthRatio = Math.round((float) width / (float) reqWidth);

        inSampleSize = heightRatio <= widthRatio ? heightRatio : widthRatio;
    }

    return inSampleSize;
}

我无法在 android 的取景器图像中设置图像

i can't set image in viewholder image in android

android

uri

bitmap

adapter

imageview