import android.content.Intent;
import android.graphics.Bitmap;
import android.media.Image;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

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

    public void tomarFoto(View view)
    {
        Intent llamdaCamara = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(llamdaCamara, 0);
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // Check which request we're responding to
        ImageView fotopreview = findViewById(R.id.preview);

        //if (requestCode == PICK_CONTACT_REQUEST) {
            // Make sure the request was successful
            if (resultCode == RESULT_OK)
            {
                Bundle extra = data.getExtras();
                Bitmap imageBitmap = (Bitmap) extra.get("data");
                fotopreview.setImageBitmap(imageBitmap);

                // The user picked a contact.
                // The Intent's data Uri identifies which contact was selected.

                // Do something with the contact here (bigger example below)
            }
        //}
    }
}