Get the size of an Android file resource?

问题

I have a video file in the raw folder in my resources. I want to find the size of the file. I have this piece of code:

Uri filePath = Uri.parse("android.resource://com.android.FileTransfer/" + R.raw.video);
                File videoFile = new File(filePath.getPath());
                Log.v("LOG", "FILE SIZE "+videoFile.length());

But it always gives me that the size is 0. What am I doing wrong?

回答1:

You can't use File for resources. Use Resources or AssetManager to get an InputStream to the resource, then call the available() method on it.

Like this:

InputStream is = context.getResources().openRawResource(R.raw.nameOfFile);
int sizeOfInputStram = is.available(); // Get the size of the stream

回答2:

Try this lines:

InputStream ins = context.getResources().openRawResource (R.raw.video)
int videoSize = ins.available();

回答3:

Try this:

AssetFileDescriptor sampleFD = getResources().openRawResourceFd(R.raw.video);
long size = sampleFD.getLength()

回答4:

Slight variation to the answer by @shem

AssetFileDescriptor afd = contentResolver.openAssetFileDescriptor(fileUri,"r");
long fileSize = afd.getLength();
afd.close();

Where fileUri is of type Android Uri

来源：https://stackoverflow.com/questions/6049926/get-the-size-of-an-android-file-resource