然後我試著在對應Activity的onCreate中獲取高寬。獲得的所有是0.但我在onCreate中的加了個點擊控件獲取高寬事件，能正確獲取高寬。

我在網上查了下資料，由於在onCreate中控件還未被度量，所以獲取肯定為0.網上有獲取三個方法，方法例如以下：
方法一，在onCreate中加入例如以下代碼:
int w = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
int h = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
myView.measure(w, h);
int height = myView.getMeasuredHeight();
int width = myView.getMeasuredWidth();
tvValues.append("方法一: height:"+height + ",width:" + width+"\n");

方法二能夠實現，代碼例如以下：
ViewTreeObserver vto2 = myView.getViewTreeObserver();
vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
myView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
tvValues.append( "方法二: height:"+myView.getHeight() + ",width:" + myView.getWidth()+"\n");
}
});
但我發現removeGlobalOnLayoutListener在API 級別 16 開始已經廢棄，假設去掉。系統會讀取多次。

再來看看方法三。代碼例如以下：

ViewTreeObserver vto = myView.getViewTreeObserver();
vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
public boolean onPreDraw() {
myView.getViewTreeObserver().removeOnPreDrawListener(this);
int height = myView.getMeasuredHeight();
int width = myView.getMeasuredWidth();
tvValues.append("方法三: height:"+height + ",width:" + width + "..\n");
return true;
}
});
我在網上資料的基礎上加入了myView.getViewTreeObserver().removeOnPreDrawListener(this);這一條，這個能夠保證系統執行一次。

_____________________________________________________________________________________________________________

出現的問題：（1）用上面的2個回調監聽函數。監聽函數會一直調用，關閉不了。並且屏幕跳轉會出現閃屏的現象。所以放棄了

public void setActionBar(){
    ViewTreeObserver  observer = mScrollView.getViewTreeObserver();
//    observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
//      @Override
//      public boolean onPreDraw() {
//        int i = 0;
//        Log.e("HomeFragment:" + (i++));
//        //int scrollHeight = mScrollView.getChildAt(0).getHeight();
//        int scrollHeight = getScreenHeight() - getActionView().getHeight() - mHomeAd.getHeight() - mMineCare.getHeight() -MainUI.bottomHeight;
//        int TextHeight = mHomeProgramTxt.getHeight();
//
//        if(scrollHeight > (bitmapHeight+TextHeight)*2){
//          //大屏幕
//          int firstBarHeight = mFirstBar.getHeight();
//          int blankHeight = scrollHeight - firstBarHeight*2;
//
//          LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) mFirstBar.getLayoutParams();
//          params.setMargins(0, blankHeight / 3, 0, 0);
//          mFirstBar.setLayoutParams(params);
//
//          LinearLayout.LayoutParams secondParams = (LinearLayout.LayoutParams) mSecondBar.getLayoutParams();
//          secondParams.setMargins(0,blankHeight/3,0,0);
//          mSecondBar.setLayoutParams(secondParams);
//        }
//        mScrollView.getViewTreeObserver().removeOnPreDrawListener(this);
//        return true;
//      }
//    });

 public void set(){
    int w = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
    int h = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);

    getActionView().measure(w, h);
    mMineCare.measure(w,h);
    //詳細值單獨賦值
    int homeAdHeight = 520 * getScreenHeight() / 1920;
    int scrollHeight = getScreenHeight() - getActionView().getMeasuredHeight() - homeAdHeight - mMineCare.getMeasuredHeight() -MainUI.bottomHeight;
    mHomeProgramTxt.measure(w,h);
    int TextHeight = mHomeProgramTxt.getMeasuredHeight();

    if(scrollHeight > (bitmapHeight+TextHeight)*2.5){
      //大屏幕
      mFirstBar.measure(w,h);
      int firstBarHeight = mFirstBar.getMeasuredHeight();
      int blankHeight = scrollHeight - firstBarHeight*2;

      LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) mFirstBar.getLayoutParams();
      params.setMargins(0, blankHeight / 3, 0, 0);
      mFirstBar.setLayoutParams(params);
      mSecondBar.setLayoutParams(params);
    }
  }

實現低分辨率適配效果：

高分辨率效果：

android屏幕適配方案