Question

I am creating a simple toolbar using RelativeLayout

and to a button image i am using following code,

ImageButton back = new ImageButton(ctx.getContext());
                RelativeLayout.LayoutParams backLayoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
                backLayoutParams.addRule(RelativeLayout.CENTER_VERTICAL);


                back.setLayoutParams(backLayoutParams);
                back.setContentDescription("Back Button");
                back.setId(2);
                try {
                    back.setImageBitmap(loadDrawable("icon_left.png"));
                } catch (IOException e) {
                    Log.e(LOG_TAG, e.getMessage(), e);
                }
                back.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {
                       //
                    }
                });

for adding it to the toolbar

toolbar.addView(back);

for toolbar i am using,

RelativeLayout toolbar = new RelativeLayout(ctx.getContext());
toolbar.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,60));           

Problem is that the button image doesnt FILLS inside layout param.

i tried using setMargin it works, but it doesnot scales with various screen resolutions.

Need directions on how to do this.

Answer 1

By default, ImageButton has a button background behind its image just like Button does behind its text.

Disable the background by calling setBackgroundDrawable(null) in your code.