Как создать изображение png?

public static Bitmap getBitmapFromView(View view) {
    Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(returnedBitmap);
    Drawable bgDrawable =view.getBackground();
    if (bgDrawable!=null) 
        bgDrawable.draw(canvas);
    else 
        canvas.drawColor(Color.WHITE);
    view.draw(canvas);
    return returnedBitmap;
}

//create a file to write bitmap data
File f = File(context.getCacheDir(), filename);
f.createNewFile();
 
//Convert bitmap to byte array
Bitmap bitmap = your bitmap;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos);
byte[] bitmapdata = bos.toByteArray();
 
//write the bytes in file
FileOutputStream fos = new FileOutputStream(f);
fos.write(bitmapdata);

// get bitmap from view
public static Bitmap getBitmapFromView(View view) {
    //create bitmap
    Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),Bitmap.Config.ARGB_8888);
    //create canvas
    Canvas canvas = new Canvas(returnedBitmap);
    //get background drawable
    Drawable bgDrawable =view.getBackground();
    if (bgDrawable!=null) {
        //draw background drawable
        bgDrawable.draw(canvas);
    }else {
         //draw white background
        canvas.drawColor(Color.WHITE);
     }
    //draw view
    view.draw(canvas);
     //return bitmap
    return returnedBitmap;
}

Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_STREAM, Uri.parse(filePath));
try
{
    startActivity(Intent.createChooser(intent, "Sending File..."));
}

public class FullscreenActivity extends Activity {
    String surname, name, patronymic, surname_translit, name_translit, patronymic_translit;
    EditText surname_vvod, name_vvod, patronymic_vvod;
    WebView mWebView;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fullscreen);
 
        mWebView = (WebView) findViewById(R.id.YourColor);
        surname_vvod = (EditText) findViewById(R.id.editText1);
        name_vvod = (EditText) findViewById(R.id.editText2);
        patronymic_vvod = (EditText) findViewById(R.id.editText3);
        final Button button1 = (Button) findViewById(R.id.button1);
        final Button button2 = (Button) findViewById(R.id.button2);
 //Ещё код
        mWebView.loadDataWithBaseURL(null, npage, "text/html", "UTF-8", null);
        button1.setOnClickListener(new View.OnClickListener() {
 
            public void onClick(View v){
//Ещё код
                    mWebView.loadDataWithBaseURL(null, html, "text/html", "UTF-8", null);
                }
            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
 
            public void onClick(View v){
                Bitmap returnedBitmap = Bitmap.createBitmap(mWebView.getWidth(), mWebView.getHeight(),Bitmap.Config.ARGB_8888);
                Canvas canvas = new Canvas(returnedBitmap);
                Drawable bgDrawable = mWebView.getBackground();
                if (bgDrawable!=null) 
                    bgDrawable.draw(canvas);
                else 
                    canvas.drawColor(Color.WHITE);
                mWebView.draw(canvas);              
            }
            });
    }
}