public class AndroidBug5497Workaround {  // For more information, see https://code.google.com/p/android/issues/detail?id=5497 // To use this class, simply invoke assistActivity() on an Activity that already has its content  view set.  public static void assistActivity (Activity activity) { new AndroidBug5497Workaround(activity); } private Activity activity; private View mChildOfContent; private int usableHeightPrevious; private FrameLayout.LayoutParams frameLayoutParams;  private AndroidBug5497Workaround(Activity activity) { this.activity = activity; FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content); mChildOfContent = content.getChildAt(0); mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new  ViewTreeObserver.OnGlobalLayoutListener() {  public void onGlobalLayout() {  possiblyResizeChildOfContent();  } }); frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams(); }  private void possiblyResizeChildOfContent() { int usableHeightNow = computeUsableHeight(); LogUtils.e("possiblyResizeChildOfContent","usableHeightNow:"+usableHeightNow); LogUtils.e("possiblyResizeChildOfContent","usableHeightPrevious:"+usableHeightPrevious); if (usableHeightNow != usableHeightPrevious) {  int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();   //這個判斷是為了解決19之前的版本不支持沉浸式狀態(tài)欄導(dǎo)致布局顯示不完全的問題  if(Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT){  Rect frame = new Rect();  activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);  int statusBarHeight = frame.top;  usableHeightSansKeyboard -= statusBarHeight;  }  int heightDifference = usableHeightSansKeyboard - usableHeightNow;  if (heightDifference > (usableHeightSansKeyboard/4)) {  // keyboard probably just became visible  frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;  } else {  // keyboard probably just became hidden  frameLayoutParams.height = usableHeightSansKeyboard;  }  mChildOfContent.requestLayout();  usableHeightPrevious = usableHeightNow; } }  private int computeUsableHeight() { Rect frame = new Rect(); activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame); int statusBarHeight = frame.top;  Rect r = new Rect(); mChildOfContent.getWindowVisibleDisplayFrame(r);  //這個判斷是為了解決19之后的版本在彈出軟鍵盤時，鍵盤和推上去的布局（adjustResize）之間有黑色區(qū)域 的問題 if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){  return (r.bottom - r.top)+statusBarHeight; }  return (r.bottom - r.top); } }