In Android how to get the width of the Textview which is set to Wrap_Content

Question

I am trying to add a text to the textview for which i have set the width as Wrap_content. I am trying to get the width of this textview. But its showing 0 in all the cases. How Can i get the width of the textview after setting the text into it.

the code is as:

        LinearLayout ll= new LinearLayout(this);
        ll.setOrientation(LinearLayout.VERTICAL);
        TextView tv = new TextView(this);
        tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
        ll.addView(tv);
        tv.setText("Hello 1234567890-0987654321qwertyuio787888888888888888888888888888888888888888888888888");
        System.out.println("The width is == "+tv.getWidth());// result is 0
        this.setContentView(ll);

Please suggest. Thanks in advance.

Answer 1

Views with the dynamic width/height get their correct size only after a layout process was finished (http://developer.android.com/reference/android/view/View.html#Layout).
You can add OnLayoutChangeListener to your TextView and get it's size there:

tv.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
           public void onLayoutChange(View v, int left, int top, int right, int bottom, 
                                      int oldLeft, int oldTop, int oldRight, int oldBottom) {
                        final int width = right - left;
                        System.out.println("The width is == " + width);                
    });

Answer 2

You can not get the width of a View with dynamic size before the layout is completely built. That means there is no way you can get it in onCreate(). One way would be to create a class that inherits from TextView and overrides onSizeChanged().