package gw.techinmotion.uums;

import android.app.Activity; import android.graphics.Rect; import android.view.View; import android.view.ViewTreeObserver; import android.widget.FrameLayout;

public class AndroidBug5497Workaround {

public static void assistActivity(Activity activity){
    new AndroidBug5497Workaround(activity);
}

private View mChildOfContent;
private int usableHeightPrevious;
private FrameLayout.LayoutParams frameLayoutParams;

private AndroidBug5497Workaround(Activity activity){
            // 이부분 오류 FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
    FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
    mChildOfContent = content.getChildAt(0);
    mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            possiblyResizeChildOfContent();
        }
    });

    frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
}

private void possiblyResizeChildOfContent(){
    int usableHeightNow = computeUsableHeight();
    if(usableHeightNow != usableHeightPrevious){
        int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
        int heightDifference = usableHeightSansKeyboard - usableHeightNow;
        if(heightDifference > (usableHeightSansKeyboard/4)){
            frameLayoutParams.height = usableHeightSansKeyboard-heightDifference;
        }else{
            frameLayoutParams.height = usableHeightSansKeyboard;
        }

        mChildOfContent.requestLayout();
        usableHeightPrevious = usableHeightNow;
    }
}

private int computeUsableHeight(){
    Rect r = new Rect();
    mChildOfContent.getWindowVisibleDisplayFrame(r);
    return (r.bottom-r.top);
}

}