Android开发禁用通知栏下拉

应用禁用通知栏下拉这个需求让我头疼了好几天
statusbar用了后但是效果不是很满意
其他的方法试过但是没有效果，所以就换个思路吧
做法是在通知栏区域弄一个透明的window，这样下拉的时候触摸的区域就是这个window，系统的就下拉不了了
改做法是需要在应用上方显示一个window 所以需要权限

1 <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
2
3
4 public static final String STATUS_BAR_HEIGHT = "status_bar_height";
5  public static final String DIMEN = "dimen";
6  public static final String DEF_PACKAGE = "android";
7   public static void preventStatusBarExpansion(Context context) {
8    WindowManager manager = ((WindowManager) context.getApplicationContext()
9                                                    .getSystemService(Context.WINDOW_SERVICE));
10
11    WindowManager.LayoutParams localLayoutParams = new WindowManager.LayoutParams();
12    localLayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
13    localLayoutParams.gravity = Gravity.TOP;
14    localLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
15        | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
16        | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
17
18    localLayoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
19
20    int resId = context.getResources()
21                       .getIdentifier(STATUS_BAR_HEIGHT, DIMEN, DEF_PACKAGE);
22    int result;
23    if (resId > 0) {
24      result = context.getResources()
25                      .getDimensionPixelSize(resId);
26    } else {
27      // Use Fallback size:
28      result = 60; // 60px Fallback
29    }
30
31    localLayoutParams.height = result;
32    localLayoutParams.format = PixelFormat.TRANSPARENT;
33
34    if (view == null) {
35      view = new CustomViewGroup(context);
36    }
37
38    try {
39      if (manager != null) {
40        manager.addView(view, localLayoutParams);
41      }
42    } catch (Exception ignored) {
43    }
44  }
45
46  public static void allowStatusBarExpansion(Context context) {
47    WindowManager manager = ((WindowManager) context.getApplicationContext()
48                                                    .getSystemService(Context.WINDOW_SERVICE));
49    try {
50      if (manager != null) {
51        manager.removeViewImmediate(view);
52      }
53    } catch (Exception ignored) {
54    }
55  }
56
57  public static class CustomViewGroup extends ViewGroup {
58    public CustomViewGroup(Context context) {
59      super(context);
60    }
61
62    @Override
63    protected void onLayout(boolean changed,
64                            int l,
65                            int t,
66                            int r,
67                            int b) {
68    }
69
70    @Override
71    public boolean onInterceptTouchEvent(MotionEvent ev) {
72      // Intercepted touch!
73      return true;
74    }
75  }