How do I capture video or audio and display only on android ?

package inducesmile.com.androidcameraapplication;

import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.VideoView;


public class MainActivity extends ActionBarActivity {

    private ImageView imageHolder;
    private VideoView videoHolder;
    private final int requestCode = 20;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageHolder = (ImageView)findViewById(R.id.captured_photo);
        Button capturedImageButton = (Button)findViewById(R.id.photo_button);
        Button capturedVideoButton = (Button)findViewById(R.id.Video_button);
        Button capturedAudioButton = (Button)findViewById(R.id.Audio_button);
        capturedImageButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent photoCaptureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(photoCaptureIntent, requestCode);
            }
        });

        capturedVideoButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent  videoCaptureIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
                startActivityForResult(videoCaptureIntent, requestCode);
            }
        });

        capturedAudioButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent audioCaptureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE_SECURE);
                startActivityForResult(audioCaptureIntent, requestCode);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(this.requestCode == requestCode && resultCode == RESULT_OK){
            Bitmap bitmap = (Bitmap)data.getExtras().get("data");
            imageHolder.setImageBitmap(bitmap);
        }
    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}