How to show android bitmapdrawable change on next clickevents?

how to show android bitmapdrawable change on next clickevents

• On next click when user inputs text, previous text on image is gone. How to save all text inputs on bitmap drawable on all click events. Please suggest. onCreate() { ImageView mView = (ImageView) findViewById(R.id.dstImageView); Drawable myDrawable = getResources().getDrawable(R.drawable.pic2); mView.setImageDrawable(myDrawable); mView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if(event.getAction() == MotionEvent.ACTION_DOWN){ float x = event.getX(); float y = event.getY(); showNameDialog(); } } private void showNameDialog() { AlertDialog.Builder alert = new AlertDialog.Builder(this); alert.setTitle("Photo Tag"); alert.setMessage("Tag Message"); // Set an EditText view to get user input final EditText input = new EditText(this); alert.setView(input); alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { Editable value = input.getText(); // Do something with value! ImageView mView3 = (ImageView) findViewById(R.id.dstImageView); myDrawable test= writeTextOnDrawable(R.drawable.pic2,value.toString(),touchxpos,touchypos); mView3.setImageDrawable(myDrawabletest); } }); // write text on drawable private BitmapDrawable writeTextOnDrawable(int drawableId, String text,float xPos,float yPos) { Bitmap bm = BitmapFactory.decodeResource(getResources(), drawableId).copy(Bitmap.Config.ARGB_8888, true); Typeface tf = Typeface.create("Helvetica", Typeface.BOLD); Paint paint = new Paint(); paint.setStyle(Style.FILL); paint.setColor(Color.RED); paint.setTypeface(tf); paint.setTextAlign(Align.CENTER); paint.setTextSize(11); Rect textRect = new Rect(); paint.getTextBounds(text, 0, text.length(), textRect); Canvas canvas = new Canvas(bm); canvas.drawText(text, xPos, yPos, paint); return new BitmapDrawable(getResources(), bm); } How do i save the texts on bitmapdrawable for each click. Every time the previous text is getting replaced with latest one??

• Answer:

  Every time you call writeTextOnDrawable() you are returning a new Drawable so the previous one is getting discarded. You need to have a function where you can pass an existing Drawable as reference like so: private BitmapDrawable writeTextOnDrawable(BitmapDrawable existingDrawable, int drawableId, String text,float xPos,float yPos) { Bitmap bm; if (existingDrawable == null) { bm = BitmapFactory.decodeResource(getResources(), drawableId).copy(Bitmap.Config.ARGB_8888, true); } else { bm = existingDrawable.getBitmap(); } Typeface tf = Typeface.create("Helvetica", Typeface.BOLD); Paint paint = new Paint(); paint.setStyle(Style.FILL); paint.setColor(Color.RED); paint.setTypeface(tf); paint.setTextAlign(Align.CENTER); paint.setTextSize(11); Rect textRect = new Rect(); paint.getTextBounds(text, 0, text.length(), textRect); Canvas canvas = new Canvas(bm); canvas.drawText(text, xPos, yPos, paint); return new BitmapDrawable(getResources(), bm); } Note however that this will just write text over the existing one because the paint.getTextBounds(text, 0, text.length(), textRect); remains the same. You will need to control that yourself if you want the new text to be put under the existing one.