Android Open Source - android-movies-demo Centering Relative Layout

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License

The source code is released under:

MIT License

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Java Source Code

package com.idunnolol.moviesdemo.view;
//ww w .ja  v a 2 s  . c o  m
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RelativeLayout;

/**
 * As this is translated, its children get translated back in the opposite direction
 * This has the effect of making it look "centered" even though it is sliding.
 */
public class CenteringRelativeLayout extends RelativeLayout {

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

  public CenteringRelativeLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public CenteringRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  @Override
  public void setTranslationX(float translationX) {
    super.setTranslationX(translationX);

    float childCounter = -translationX / 2;
    int childCount = getChildCount();
    for (int a = 0; a < childCount; a++) {
      View child = getChildAt(a);
      child.setTranslationX(childCounter);
    }
  }

}

Java Source Code List