如何在Android中打开装有Uri的文件？

Question

I am trying to open an image I have stored on external memory. Here is the code I have:

File imagePath = new File(imageURI);
InputStream inputStream=null;
try {
    inputStream = getContentResolver().openInputStream(Uri.parse(imageURI));
}catch(FileNotFoundException e){
    e.printStackTrace();
}
Bitmap bm = BitmapFactory.decodeStream(inputStream);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] originalImage = baos.toByteArray();

But it doesn't seem to be able to locate the file. The Uri is in the format content://com.android.providers.media.documents/document/image%3A21. Thanks for any help.

Answer 1

In a project I am working on now I have external images in a directory on the SD card. I am using

 String thePath = Environment.getExternalStorageDirectory() + "/myAppFiles”; File imgFile = new File(thePath + " / " + " externalImage.jpg "); if (imgFile.exists()) { try { BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 6; Bitmap bm = BitmapFactory.decodeFile(imgFile.getAbsolutePath(), options); } } 

Answer 2

Try this:

File imagePath = new File(imageURI.getPath());

url.getPath() returns a String in the following format: "/mnt/sdcard/xxx.jpg", without the scheme type pre-fixed