Question

I am working with an image. In my application I have displayed an image from drawable and set that drawable image to ImageView. When I click on a button I would like to encode the ImageView image to byte code by using Base64.

I have implemented code as follows:

((ImageView)findViewById(R.id.imageView1)).setImageResource(R.drawable.person);

((Button)findViewById(R.id.button1)).setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        ((TextView)findViewById(R.id.textView1)).setText("Get((ImageView)findViewById(R.id.imageView1)) image Base64.encode() here");
    }
});

How can I get the encoded imageView1 image to byte code?

Can anybody please help me.

Answer 1

Try this…

    Bitmap bitmap=BitmapFactory.decodeResource(getResources(), R.drawable.images);
    ByteArrayOutputStream stream=new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream);
    byte[] image=stream.toByteArray();
    System.out.println("byte array:"+image);

    String img_str = Base64.encodeToString(image, 0);
    System.out.println("string:"+img_str);

Now set that string to your Textview as

    tv.setText(img_str);