Android编程实现获取标题栏、状态栏的高度、屏幕大小及模拟Home键的方法

/** 
* 获取标题栏的高度 
* 
* @param activity 
* @return 
*/ 
public int getTitleHeight(Activity activity) {
  Rect rect = new Rect();
  Window window = activity.getWindow(); 
  window.getDecorView().getWindowVisibleDisplayFrame(rect);
  int statusBarHeight = rect.top;
  int contentViewTop = window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
  int titleBarHeight = contentViewTop - statusBarHeight;
  return titleBarHeight; 
}

/** 
* 
* 获取状态栏高度 
* 
* @param activity 
* @return 
*/ 
public int getStateHeight(Activity activity) { 
  Rect rect = new Rect();
  activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
  return rect.top;
}

/** 
* 获取屏幕宽高 
* 
* @param activity 
* @return int[0] 宽，int[1]高 
*/ 
public int[] getScreenWidthAndSizeInPx(Activity activity) {
  DisplayMetrics displayMetrics = new DisplayMetrics(); 
  activity.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
  int[] size = new int[2];
  size[0] = displayMetrics.widthPixels;
  size[1] = displayMetrics.heightPixels;
  return size;
}

/** 
* 模拟home键 
* 
* @param context 
*/ 
public void goToDestop(Context context) {
  Intent intent = new Intent(Intent.ACTION_MAIN);
  intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  intent.addCategory(Intent.CATEGORY_HOME);
  context.startActivity(intent);
}