Share stegoimage to another app with intent (android)

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Java

Android

Eclipse

I have image steganography app for android. The main function of this app have worked well, such as encoding, decoding, and save images in phone storage.

But, I want a picture that has been inserted a secret message can be shared with other app like Whatsapp, Facebook, Twitter. After I try to make the share button and click the button, I was not given a choice application where I will share those images.

However, I was directed to the MMS message. although the MMS message can work well, but I want to be able to choose the app where I will share images.

Can you help me fix the code?
Thank you!!

What I have tried:

This is a part of encoding code where assosiated with share button :

Button buttonShare = (Button) findViewById(R.id.share);
buttonShare.setOnClickListener(new Button.OnClickListener() {

    public void onClick(View v) {

        closeContextMenu();
        closeOptionsMenu();
        progressBar=new MobiProgressBar(EncodeActivity.this);
        progressBar.setMax(100);
        progressBar.setMessage(context.getString(R.string.encoding));
        progressBar.show();
        Thread tt = new Thread(new Runnable() {
            public void run() {
                Uri uri= encode();
                ShareIntent share=new ShareIntent(uri,EncodeActivity.this);
                progressBar.dismiss();
                share.send();
            }
        });
        tt.start();
    }
});

And this code for share method :

import android.content.Context;
import android.content.Intent;
import android.net.Uri;

public class ShareIntent {
private Uri uri;    
private final Context context;

public Uri getUri() {
    return uri;
}

public void setUri(Uri uri) {
    this.uri = uri;
}   

public ShareIntent(Uri uri,Context context) {       
    this.uri = uri;
    this.context=context;
}

public void send()
{
    Intent shareIntent = new Intent(Intent.ACTION_SEND);
    shareIntent.putExtra(Intent.EXTRA_STREAM,uri);
    shareIntent.setType("image/jpeg");
    context.startActivity(Intent.createChooser(shareIntent, "Share Image"));
}
}