android中c++层binder简单例子

service

1. #include
2. #include
3. #include
4. #include
5. #include
6.  
7. using namespace android;
8.  
9. #ifdef LOG_TAG
10. #undef LOG_TAG
11. #endif
12. #define LOG_TAG "testService"
13.  
14.  
15. class MyService : public BBinder
16. {
17. public:
18. MyService()
19. {
20. mydescriptor = String16("media.hello");
21. n=0;
22. }
23. virtual ~MyService() {}
24.  
25. //This function is used when call Parcel::checkInterface(IBinder*)
26. virtual const String16& getInterfaceDescriptor() const
27. {
28. LOGE("this is enter ==========getInterfaceDescriptor");
29. return mydescriptor;
30.  
31. }
32.  
33. protected:
34. void show()
35. {
36. LOGE("this is for test show!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
37. LOGE("this is for test show!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
38. LOGE("this is for test show!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
39. LOGE("this is for test show!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
40. LOGE("this is for test show!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
41. }
42. virtual status_t onTransact( uint32_t code,
43. const Parcel& data,
44. Parcel* reply,
45. uint32_t flags = 0)
46. {
47. LOGD("enter MyService onTransact and the code is %d",code);
48. /*
49. if (data.checkInterface(this))
50. LOGD("checkInterface OK");
51. else
52. {
53. LOGW("checkInterface failed");
54. return BBinder::onTransact(code, data, reply, flags);
55. }
56. */
57. switch (code)
58. {
59. case 1:
60. LOGD("MyService interface 1");
61. break;
62. case 2:
63. LOGD("MyService interface 2");
64. cb = data.readStrongBinder();
65. break;
66. case 3:
67. {
68. LOGD("MyService interface 3, exit");
69. //No unregister service routine?
70.  
71. //It should return to client first and then call exit in another place.
72. exit(0);
73. break;
74. }
75. case 4:
76. {//call cb
77. LOGD("MyService interface 4 before if================");
78. cb = data.readStrongBinder();
79. if (cb != NULL)
80. {
81. LOGD("MyService interface 4");
82. Parcel in, out;
83. in.writeInterfaceToken(String16("ghq.callback"));
84. in.writeInt32(n++);
85. in.writeString16(String16("This is a string."));
86. cb->transact(1, in, &out, 0);
87. show();
88. }
89. break;
90. }
91. default:
92. return BBinder::onTransact(code, data, reply, flags);
93. }
94. return 0;
95. }
96.  
97. private:
98. String16 mydescriptor;
99. sp cb;
100. int n;
101. };
102.  
103.  
104.  
105. int main()
106. {
107.  
108. sp sm = defaultServiceManager();
109.  
110. status_t ret;
111.  
112. //register MyService to ServiceManager
113. MyService* srv = new MyService();
114. ret = sm->addService(String16("media.hello"), srv);
115.  
116.  
117. LOGD("addservice media.hello return %d", ret);
118.  
119. //call binder thread pool to start
120. ProcessState::self()->startThreadPool();
121. IPCThreadState::self()->joinThreadPool(true);
122. return 0;
123. }

 

client

1. #include
2. #include
3. #include
4. #include
5. #include
6. #include
7.  
8. using namespace android;
9.  
10. #ifdef LOG_TAG
11. #undef LOG_TAG
12. #endif
13. #define LOG_TAG "testCallback"
14.  
15. class MySetupCallback : public BBinder
16. {
17. public:
18. MySetupCallback()
19. {
20. mydescriptor = String16("android.os.ISetupCallback");
21. }
22. virtual ~MySetupCallback() {}
23.  
24. virtual const String16& getInterfaceDescriptor() const
25. {
26. return mydescriptor;
27. }
28.  
29. protected:
30. virtual status_t onTransact( uint32_t code,
31. const Parcel& data,
32. Parcel* reply,
33. uint32_t flags = 0)
34. {
35. LOGD("enter MySetupCallback onTransact, code=%u", code);
36. if (data.checkInterface(this))
37. LOGD("checkInterface OK");
38. else
39. {
40. LOGW("checkInterface failed");
41. return -1;
42. }
43. switch (code)
44. {
45. default:
46. break;
47. }
48. return 0;
49. }
50.  
51. private:
52. String16 mydescriptor;
53. };
54.  
55. int main()
56. {
57. sp sm = defaultServiceManager();
58.  
59. sp b = sm->getService(String16("media.hello")); //Context.MCU_SERVICE
60.  
61. if (b == NULL)
62. {
63. LOGW("Can't find binder service \"media.hello\"");
64. return -1;
65. }
66.  
67. Parcel in1,out1;
68. MySetupCallback *cb = new MySetupCallback();
69. in1.writeStrongBinder(sp(cb));
70. int ret = b->transact(4, in1, &out1, 0); //TRANSACTION_registerSetup = 4
71. LOGD("transact(4) return %d", ret);
72.  
73. ProcessState::self()->startThreadPool();
74. IPCThreadState::self()->joinThreadPool();
75.  
76. return 0;
77. }

 

Android.mk

1. # Copyright 2006 The Android Open Source Project
2.  
3. LOCAL_PATH:= $(call my-dir)
4. include $(CLEAR_VARS)
5.  
6. LOCAL_MODULE_TAGS := eng
7.  
8. LOCAL_SRC_FILES:= \
9.        testCallback.cpp
10.  
11. LOCAL_C_INCLUDES += \
12.         $(LOCAL_PATH) \
13.         $(LOCAL_PATH)/../include \
14.         $(LOCAL_PATH)/../include/callback \
15.  
16.  
17. LOCAL_SHARED_LIBRARIES := \
18.     libcutils \
19.     libbinder \
20.     libutils \
21.     libhardware
22.  
23. LOCAL_CFLAGS := -DRIL_SHLIB
24.  
25. LOCAL_MODULE:= testCallback
26.  
27. include $(BUILD_EXECUTABLE)
28.  
29. include $(CLEAR_VARS)
30.  
31. LOCAL_MODULE_TAGS := eng
32.  
33. LOCAL_SRC_FILES:= \
34.            testService.cpp
35.  
36. LOCAL_C_INCLUDES += \
37.         $(LOCAL_PATH) \
38.         $(LOCAL_PATH)/../include \
39.         $(LOCAL_PATH)/../include/callback \
40.  
41.  
42. LOCAL_SHARED_LIBRARIES := \
43.     libcutils \
44.     libbinder \
45.     libutils \
46.     libhardware
47.  
48. LOCAL_CFLAGS := -DRIL_SHLIB
49.  
50. LOCAL_MODULE:= testService
51.  
52. include $(BUILD_EXECUTABLE)

来源：oschina

链接：https://my.oschina.net/u/920274/blog/3222654