将字符串另存为设备内部存储中的图像

Question

I'm developing an Android app that connects to facebook and save user's profile image on device internal storage.

This is my code:

private void getFacebookUserProfilePicture(String userAccessToken)
{
    String url = Constants.FB_PROFILE_IMAGE_URL + userAccessToken;

    AsyncHttpClient client = new AsyncHttpClient();
    client.get(url, new AsyncHttpResponseHandler()
    {
        @Override
        public void onSuccess(String response)
        {
            saveUserProfileImage(response.getBytes());
        }
    });
}
private void saveUserProfileImage(byte[] imageBytes)
{
    Log.v(TAG, "Save user image");

    FileOutputStream fOut = null;
    try
    {
        fOut = openFileOutput(Constants.FB_PROFILE_IMAGE_FILE_NAME, Context.MODE_PRIVATE);

        fOut.write(imageBytes);
        fOut.close();
    }
    catch (IOException ioe)
    {
        ioe.printStackTrace();
    }
}

I'm testing using Android emulator and I have used Eclipse DDMS to save the file to my PC, but I can't open it.

What am I doing wrong? I have saved with a jpg extension.

Or maybe, the question could be: How can I save a byte[] as a JPG image?

If I test the url on the browser, I get an image with 2,47KB . And the image I have copied from the device is 4,26KB .

Answer 1

you can follow this link . And after that you can check if it's loading image from device or not.

Answer 2

You can convert string into byte array and then write this array to your filename. You this method to write array:

public void WriteByteToFile(byte[] mybytes, String filename){

try {

FileOutputStream FOS = openFileOutput(filename, MODE_PRIVATE);
FOS.write(mybytes);
FOS.close();


} catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

}

Convert string into byte array like below:

byte[] bytes = string.getBytes("UTF-8");

Try it hopr this solve your problem..