/**
* 根据屏幕宽度计算得到view的宽度（用于适配GridLayout）
*
* @param columnCount 要显示的GridView的列数
* @return view宽度（px）
*/
public int getViewWidthByWindowWidth(int columnCount) {
DisplayMetrics dm = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
float density = dm.density;
int windth =
(int)
((dm.widthPixels - getSidebarWidth() - (20 + 10 * columnCount) * density)
/ columnCount);
Log.i(activity.getPackageName(), "===========计算得到的view-width:" + windth);
return windth;
}
/**
* 当Fragment改变时，改变左侧对应条目的背景颜色,并实现ScrollView自动滚动到焦点位置
*
* @param clickedView
*/
public void setLeftTextViewBackgroundColorWhenFragmentChanged(String leftTextViewTag) {
Fragment fragmentLeft =
activity.getSupportFragmentManager().findFragmentById(R.id.fragment_left);
View leftView = fragmentLeft.getView();
View clickedLeftTextView = leftView.findViewWithTag(leftTextViewTag);
ScrollView scrollView = (ScrollView) leftView.findViewById(R.id.scrollView_left);
clickedLeftTextView.setFocusable(true);
clickedLeftTextView.requestFocus(); // view获取焦点
if (leftTextViewTag.equals("0") || leftTextViewTag.equals("1") || leftTextViewTag.equals("2"))
scrollView.fullScroll(ScrollView.FOCUS_FORWARD); // 向前滚动
else scrollView.fullScroll(ScrollView.FOCUS_DOWN); // 向后滚动
Log.i(getClass().toString(), "clickedLeftTextView:" + clickedLeftTextView);
setLeftTextViewBackgroundColor(clickedLeftTextView, Integer.parseInt(leftTextViewTag));
}
/**
* 获取左边导航栏的宽度
*
* @return
*/
private int getSidebarWidth() {
View view = activity.findViewById(R.id.fragment_left_container);
return AndroidUtil.getViewWidth(view);
}