ctr关屏特效，有兴趣的可以试试

我们要实现特效的添加，首先需要做的是反编译services.jar文件
之后打开/com/android/server/PowerManagerService.smali文件
找到getPreferredBrightness()I这行
在上面添加：
1. .method static synthetic getContextZZ(Lcom/android/server/PowerManagerService;)Landroid/content/Context;
2. .registers 2
3. .parameter "x0"
4. .prologue
5. iget-object v0, p0, Lcom/android/server/PowerManagerService;->mContext:Landroid/content/Context;
6. return-object v0
7. .end method
复制代码
打开/com/android/server/PowerManagerService$BrightnessState.smali文件
找到# virtual methods这行
在上面添加：
1. .method private getScreenAnimationMode(Landroid/content/Context;)I
2. .registers 7
3. .parameter "context"
4. .prologue
5. const v0, 0x0
6. const v3, 0x1
7. const v4, 0x10
8. invoke-virtual {p1}, Landroid/content/Context;->getContentResolver()Landroid/content/ContentResolver;
9. move-result-object v1
10. const-string v2, "config_beam_screen_on"
11. invoke-static {v1, v2, v3}, Landroid/provider/Settings$System;->getInt(Landroid/content/ContentResolver;Ljava/lang/String;I)I
12. move-result v2
13. if-eqz v2, :cond_22
14. const v0, 0x1
15. :goto_18
16. const-string v2, "config_beam_screen_off"
17. invoke-static {v1, v2, v3}, Landroid/provider/Settings$System;->getInt(Landroid/content/ContentResolver;Ljava/lang/String;I)I
18. move-result v2
19. if-eqz v2, :cond_21
20. add-int/2addr v0, v4
21. :cond_21
22. return v0
23. :cond_22
24. const v0, 0x0
25. goto :goto_18
26. .end method
复制代码
继续3中修改的文件——找到.method public run()V
从这一行删除到下面第一个.end method那一行，也就是删除run这个函数
然后添加：
1. .method public run()V
2. .registers 10
3. .prologue
4. const/4 v8, 0x0
5. .line 2076
6. iget-object v4, p0, Lcom/android/server/PowerManagerService$BrightnessState;->this$0:Lcom/android/server/PowerManagerService;
7. invoke-static {v4}, Lcom/android/server/PowerManagerService;->getContextZZ(Lcom/android/server/PowerManagerService;)Landroid/content/Context;
8. move-result-object v4
9. invoke-direct {p0, v4}, Lcom/android/server/PowerManagerService$BrightnessState;->getScreenAnimationMode(Landroid/content/Context;)I
10. move-result v4
11. if-nez v4, :cond_3b
12. iget-object v4, p0, Lcom/android/server/PowerManagerService$BrightnessState;->this$0:Lcom/android/server/PowerManagerService;
13. iget-boolean v4, v4, Lcom/android/server/PowerManagerService;->mAnimateScreenLights:Z
14. if-eqz v4, :cond_3b
15. .line 2077
16. iget-object v4, p0, Lcom/android/server/PowerManagerService$BrightnessState;->this$0:Lcom/android/server/PowerManagerService;
17. invoke-static {v4}, Lcom/android/server/PowerManagerService;->access$500(Lcom/android/server/PowerManagerService;)Lcom/android/server/PowerManagerService$LockList;
18. move-result-object v4
19. monitor-enter v4
20. .line 2078
21. :try_start_1a
22. invoke-static {}, Landroid/os/SystemClock;->uptimeMillis()J
23. move-result-wide v2
24. .line 2079
25. .local v2, now:J
26. iget-object v5, p0, Lcom/android/server/PowerManagerService$BrightnessState;->this$0:Lcom/android/server/PowerManagerService;
27. invoke-static {v5}, Lcom/android/server/PowerManagerService;->access$4500(Lcom/android/server/PowerManagerService;)Lcom/android/server/PowerManagerService$BrightnessState;
28. move-result-object v5
29. invoke-virtual {v5}, Lcom/android/server/PowerManagerService$BrightnessState;->stepLocked()Z
30. move-result v1
31. .line 2080
32. .local v1, more:Z
33. if-eqz v1, :cond_36
34. .line 2081
35. iget-object v5, p0, Lcom/android/server/PowerManagerService$BrightnessState;->this$0:Lcom/android/server/PowerManagerService;
36. invoke-static {v5}, Lcom/android/server/PowerManagerService;->access$1800(Lcom/android/server/PowerManagerService;)Landroid/os/Handler;
37. move-result-object v5
38. const-wide/16 v6, 0x10
39. add-long/2addr v6, v2
40. invoke-virtual {v5, p0, v6, v7}, Landroid/os/Handler;->postAtTime(Ljava/lang/Runnable;J)Z
41. .line 2083
42. :cond_36
43. monitor-exit v4
44. .line 2098
45. .end local v1 #more:Z
46. .end local v2 #now:J
47. :goto_37
48. return-void
49. .line 2083
50. :catchall_38
51. move-exception v5
52. monitor-exit v4
53. :try_end_3a
54. .catchall {:try_start_1a .. :try_end_3a} :catchall_38
55. throw v5
56. .line 2085
57. :cond_3b
58. iget-object v4, p0, Lcom/android/server/PowerManagerService$BrightnessState;->this$0:Lcom/android/server/PowerManagerService;
59. invoke-static {v4}, Lcom/android/server/PowerManagerService;->access$500(Lcom/android/server/PowerManagerService;)Lcom/android/server/PowerManagerService$LockList;
60. move-result-object v4
61. monitor-enter v4
62. .line 2087
63. :try_start_42
64. iget-boolean v5, p0, Lcom/android/server/PowerManagerService$BrightnessState;->animating:Z
65. if-eqz v5, :cond_6b
66. iget v5, p0, Lcom/android/server/PowerManagerService$BrightnessState;->targetValue:I
67. if-nez v5, :cond_6b
68. const/4 v5, 0x1
69. move v0, v5
70. .line 2088
71. .local v0, animate:Z
72. :goto_4c
73. if-eqz v0, :cond_5d
74. .line 2091
75. iget-object v5, p0, Lcom/android/server/PowerManagerService$BrightnessState;->this$0:Lcom/android/server/PowerManagerService;