2

I am using 3 ViewPagers on a single LinearLayout. and i want to set the height of ViewPager to wrap_content dynamically. My fragment is loaded in ViewPager dynamically also. So on page change if the fragment's height is more than the viewpager's height then the viewpager's height should be automatically increased.

Layout is like

enter image description here

Please suggest what to do?

CRUSADER
  • 5,486
  • 3
  • 28
  • 64
neeraj
  • 740
  • 1
  • 6
  • 21

2 Answers2

5

The problem is that the "wrap_content" doesn't seem to be working with the View pager. Here is the solution: 

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.View;

public class CustomViewPager extends ViewPager {

public CustomViewPager(Context context) {
    super(context);
}

public CustomViewPager(Context context, AttributeSet attrs){

    super(context, attrs);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    int height = 0;
    for(int i = 0; i < getChildCount(); i++) {

        View child = getChildAt(i);

        child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

        int h = child.getMeasuredHeight();

        if(h > height) height = h;

    }

    heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);

    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}

reference: Android: I am unable to have ViewPager WRAP_CONTENT

Saeid
  • 2,261
  • 4
  • 27
  • 59
0

Assuming the implementation looks as follows, 

<LinearLayout android:orientation="vertical">
    <ViewPager />
    <ViewPager />
    <ViewPager />
</LinearLayout>

then setting the height of the ViewPagers to wrap_content should have the desired result. There is no need to do this dynamically. Otherwise, if you really want/need to do it dynamically, just set the ViewPager layoutParams to the following from code:

LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.WRAP_CONTENT, 
    LinearLayout.LayoutParams.WRAP_CONTENT);
viewPager.setLayoutParams(lp);

The parameters in the LayoutParams constructor are (width, height), and you need to change the width if you don't want that to be wrap_content.

Jeffrey Klardie
  • 3,020
  • 1
  • 18
  • 23