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 Android教程網 >> Android技術 >> Android開發 >> 開發入門 >> android java代碼的啟動：app_process

android java代碼的啟動：app_process

編輯：開發入門

在android上，如果你直接用dalivik去加載framework.jar，你會發現裡面的大部分native方法無法使用。同時，在 /init.rc裡面，你也找不到dalvikvm。在ps列表，也沒有dalvikvm。那android是怎麼啟動Java程序的呢？

在android上，Java程序是通過app_process啟動的。在/init.rc裡面，有如下一段代碼：

service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server

socket zygote stream 666

onrestart write /sys/android_power/request_state wake

onrestart write /sys/power/state on

app_process的命令行參數如下：

app_process [Java-options] cmd-dir start-class-name [options]

因此，init.rc裡面的各個參數的對應關系為：

-Xzygote： java-options,這些參數會傳給dalvik，這些參數必須以-開頭，一旦遇到不是以-開頭的或者--，代表Java-options結束。

/system/bin：cmd-dir，也就是當前目錄，文件操作的父路徑將為此路徑。

start-class-name:空

--zygote --start-system-server:選項。

vIEw plain copy to clipboard print ? 
01.if  (i < argc) {   
02.arg = argv[i++];   
03.if  (0 == strcmp( "--zygote" , arg)) {   
04.bool  startSystemServer = (i < argc) ?   
05.strcmp(argv[i], "--start-system-server" ) == 0 :  false ;   
06.setArgv0(argv0, "zygote" );   
07.set_process_name("zygote" );   
08.runtime.start("com.android.internal.os.ZygoteInit" ,   
09.startSystemServer);   
10.} else  {   
11.set_process_name(argv0);   
12.runtime.mClassName = arg;   
13.// Remainder of args get passed to startup class main()    
14.runtime.mArgC = argc-i;   
15.runtime.mArgV = argv+i;   
16.LOGV("App process is starting with pid=%d, class=%s.\n" ,   
17.getpid(), runtime.getClassName());   
18.runtime.start();   
19.}   
20.}   
vIEw plaincopy to clipboardprint?
01.if (i < argc) {   
02.arg = argv[i++];   
03.if (0 == strcmp("--zygote", arg)) {   
04.bool startSystemServer = (i < argc) ?   
05.strcmp(argv[i], "--start-system-server") == 0 : false;   
06.setArgv0(argv0, "zygote");   
07.set_process_name("zygote");   
08.runtime.start("com.android.internal.os.ZygoteInit",   
09.startSystemServer);   
10.} else {   
11.set_process_name(argv0);   
12.runtime.mClassName = arg;   
13.// Remainder of args get passed to startup class main()  
14.runtime.mArgC = argc-i;   
15.runtime.mArgV = argv+i;   
16.LOGV("App process is starting with pid=%d, class=%s.\n",   
17.getpid(), runtime.getClassName());   
18.runtime.start();   
19.}   
20.}  
vIEw plaincopy to clipboardprint?
01.if (i < argc) {   
02.arg = argv[i++];   
03.if (0 == strcmp("--zygote", arg)) {   
04.bool startSystemServer = (i < argc) ?   
05.strcmp(argv[i], "--start-system-server") == 0 : false;   
06.setArgv0(argv0, "zygote");   
07.set_process_name("zygote");   
08.runtime.start("com.android.internal.os.ZygoteInit",   
09.startSystemServer);   
10.} else {   
11.set_process_name(argv0);   
12.runtime.mClassName = arg;   
13.// Remainder of args get passed to startup class main()  
14.runtime.mArgC = argc-i;   
15.runtime.mArgV = argv+i;   
16.LOGV("App process is starting with pid=%d, class=%s.\n",   
17.getpid(), runtime.getClassName());   
18.runtime.start();   
19.}   
20.}  
if (i < argc) {
arg = argv[i++];
if (0 == strcmp("--zygote", arg)) {
bool startSystemServer = (i < argc) ?
strcmp(argv[i], "--start-system-server") == 0 : false;
setArgv0(argv0, "zygote");
set_process_name("zygote");
runtime.start("com.android.internal.os.ZygoteInit",
startSystemServer);
} else {
set_process_name(argv0);
runtime.mClassName = arg;
// Remainder of args get passed to startup class main()
runtime.mArgC = argc-i;
runtime.mArgV = argv+i;
LOGV("App process is starting with pid=%d, class=%s.\n",
getpid(), runtime.getClassName());
runtime.start();
}
}


 

從app_process的main函數（在app_main.cpp裡面）可以看出，app_process有兩種啟動方式：一種是 init.rc裡面的這種方式，這種方式將會以zygote模式啟動com.android.internal.os.ZygoteInit，並將進程名稱改為zygote；另外一種是以非zygote模擬啟動com.android.internal.os.RuntimeInit，並調用它的main 方法，main的最後會執行finishInit，finishInit是一個native方法，這個方法會調用app_process的 onStarted方法，在onStarted裡面將會調用真正要執行的class。

無論app_process，它都將會調用frameworks\base\core\jni\androidRuntime.cpp裡面的start

方法（496行）。這個start方法會根據android屬性系統設置dalvik的參數，並初始化java代碼的native方法，最終啟動dalvik。需要注意的是，java代碼的大部分native方法（差不多80%）都是在這裡面初始化的,這些初始化代碼會檢查java代碼的正確性（例如是否有對應的 native方法，是否有需要的屬性等），在初始化過程中，任何一步的錯誤都將導致進程退出。整個native方法初始化過程如下：start（AndroidRuntime.cpp，766行）->startReg(AndroidRuntime.cpp，1136 行)-> register_jni_procs(androidRuntime.cpp，1011行)。初始化的Java class有（androidRuntime.cpp，1018行）：

vIEw plain copy to clipboard print ? 
01.static   const  RegJNIRec gRegJNI[] = {   
02.REG_JNI(register_android_debug_JNITest),   
03.REG_JNI(register_com_android_internal_os_RuntimeInit),   
04.REG_JNI(register_android_os_SystemClock),   
05.REG_JNI(register_android_util_EventLog),   
06.REG_JNI(register_android_util_Log),   
07.REG_JNI(register_android_util_FloatMath),   
08.REG_JNI(register_android_text_format_Time),   
09.REG_JNI(register_android_pim_EventRecurrence),   
10.REG_JNI(register_android_content_AssetManager),   
11.REG_JNI(register_android_content_StringBlock),   
12.REG_JNI(register_android_content_XMLBlock),   
13.REG_JNI(register_android_emoji_EmojiFactory),   
14.REG_JNI(register_android_security_Md5MessageDigest),   
15.REG_JNI(register_android_text_androidCharacter),   
16.REG_JNI(register_android_text_KeyCharacterMap),   
17.REG_JNI(register_android_os_Process),   
18.REG_JNI(register_android_os_Binder),   
19.REG_JNI(register_android_os_Hardware),   
20.REG_JNI(register_android_vIEw_Display),   
21.REG_JNI(register_android_nio_utils),   
22.REG_JNI(register_android_graphics_PixelFormat),   
23.REG_JNI(register_android_graphics_Graphics),   
24.REG_JNI(register_android_vIEw_Surface),   
25.REG_JNI(register_android_view_VIEwRoot),   
26.REG_JNI(register_com_google_android_gles_jni_EGLImpl),   
27.REG_JNI(register_com_google_android_gles_jni_GLImpl),   
28.REG_JNI(register_android_graphics_Bitmap),   
29.REG_JNI(register_android_graphics_BitmapFactory),   
30.REG_JNI(register_android_graphics_Camera),   
31.REG_JNI(register_android_graphics_Canvas),   
32.REG_JNI(register_android_graphics_ColorFilter),   
33.REG_JNI(register_android_graphics_DrawFilter),   
34.REG_JNI(register_android_graphics_Interpolator),   
35.REG_JNI(register_android_graphics_LayerRasterizer),   
36.REG_JNI(register_android_graphics_MaskFilter),   
37.REG_JNI(register_android_graphics_Matrix),   
38.REG_JNI(register_android_graphics_MovIE),   
39.REG_JNI(register_android_graphics_NinePatch),   
40.REG_JNI(register_android_graphics_Paint),   
41.REG_JNI(register_android_graphics_Path),   
42.REG_JNI(register_android_graphics_PathMeasure),   
43.REG_JNI(register_android_graphics_PathEffect),   
44.REG_JNI(register_android_graphics_Picture),   
45.REG_JNI(register_android_graphics_PorterDuff),   
46.REG_JNI(register_android_graphics_Rasterizer),   
47.REG_JNI(register_android_graphics_Region),   
48.REG_JNI(register_android_graphics_Shader),   
49.REG_JNI(register_android_graphics_Typeface),   
50.REG_JNI(register_android_graphics_Xfermode),   
51.REG_JNI(register_com_android_internal_graphics_NativeUtils),  
52.REG_JNI(register_android_database_CursorWindow),   
53.REG_JNI(register_android_database_SQLiteDatabase),   
54.REG_JNI(register_android_database_SQLiteDebug),   
55.REG_JNI(register_android_database_SQLiteProgram),   
56.REG_JNI(register_android_database_SQLiteQuery),   
57.REG_JNI(register_android_database_SQLiteStatement),   
58.REG_JNI(register_android_os_Debug),   
59.REG_JNI(register_android_os_Exec),   
60.REG_JNI(register_android_os_FileObserver),   
61.REG_JNI(register_android_os_FileUtils),   
62.REG_JNI(register_android_os_ParcelFileDescriptor),   
63.REG_JNI(register_android_os_Power),   
64.REG_JNI(register_android_os_StatFs),   
65.REG_JNI(register_android_os_SystemPropertIEs),   
66.REG_JNI(register_android_os_UEventObserver),   
67.REG_JNI(register_android_net_LocalSocketImpl),   
68.REG_JNI(register_android_net_NetworkUtils),   
69.REG_JNI(register_android_net_wifi_WifiManager),   
70.REG_JNI(register_android_os_MemoryFile),   
71.REG_JNI(register_com_android_internal_os_ZygoteInit),   
72.REG_JNI(register_android_hardware_Camera),   
73.REG_JNI(register_android_hardware_SensorManager),   
74.REG_JNI(register_android_media_AudioRecord),   
75.REG_JNI(register_android_media_AudiOSystem),   
76.REG_JNI(register_android_media_AudioTrack),   
77.REG_JNI(register_android_media_JetPlayer),   
78.REG_JNI(register_android_media_ToneGenerator),   
79.REG_JNI(register_android_opengl_classes),   
80.REG_JNI(register_android_bluetooth_Database),   
81.REG_JNI(register_android_bluetooth_HeadsetBase),   
82.REG_JNI(register_android_bluetooth_BluetoothAudioGateway),  
83.REG_JNI(register_android_bluetooth_RfcommSocket),   
84.REG_JNI(register_android_bluetooth_ScoSocket),   
85.REG_JNI(register_android_server_BluetoothDeviceService),  
86.REG_JNI(register_android_server_BluetoothEventLoop),   
87.REG_JNI(register_android_server_BluetoothA2dpService),   
88.REG_JNI(register_android_message_digest_sha1),   
89.REG_JNI(register_android_ddm_DdmHandleNativeHeap),   
90.REG_JNI(register_android_util_Base64),   
91.REG_JNI(register_android_location_GpsLocationProvider),  
92.};   
vIEw plaincopy to clipboardprint?
01.static const RegJNIRec gRegJNI[] = {   
02.REG_JNI(register_android_debug_JNITest),   
03.REG_JNI(register_com_android_internal_os_RuntimeInit),   
04.REG_JNI(register_android_os_SystemClock),   
05.REG_JNI(register_android_util_EventLog),   
06.REG_JNI(register_android_util_Log),   
07.REG_JNI(register_android_util_FloatMath),   
08.REG_JNI(register_android_text_format_Time),   
09.REG_JNI(register_android_pim_EventRecurrence),   
10.REG_JNI(register_android_content_AssetManager),   
11.REG_JNI(register_android_content_StringBlock),   
12.REG_JNI(register_android_content_XMLBlock),   
13.REG_JNI(register_android_emoji_EmojiFactory),   
14.REG_JNI(register_android_security_Md5MessageDigest),   
15.REG_JNI(register_android_text_androidCharacter),   
16.REG_JNI(register_android_text_KeyCharacterMap),   
17.REG_JNI(register_android_os_Process),   
18.REG_JNI(register_android_os_Binder),   
19.REG_JNI(register_android_os_Hardware),   
20.REG_JNI(register_android_vIEw_Display),   
21.REG_JNI(register_android_nio_utils),   
22.REG_JNI(register_android_graphics_PixelFormat),   
23.REG_JNI(register_android_graphics_Graphics),   
24.REG_JNI(register_android_vIEw_Surface),   
25.REG_JNI(register_android_view_VIEwRoot),   
26.REG_JNI(register_com_google_android_gles_jni_EGLImpl),   
27.REG_JNI(register_com_google_android_gles_jni_GLImpl),   
28.REG_JNI(register_android_graphics_Bitmap),   
29.REG_JNI(register_android_graphics_BitmapFactory),   
30.REG_JNI(register_android_graphics_Camera),   
31.REG_JNI(register_android_graphics_Canvas),   
32.REG_JNI(register_android_graphics_ColorFilter),   
33.REG_JNI(register_android_graphics_DrawFilter),   
34.REG_JNI(register_android_graphics_Interpolator),   
35.REG_JNI(register_android_graphics_LayerRasterizer),   
36.REG_JNI(register_android_graphics_MaskFilter),   
37.REG_JNI(register_android_graphics_Matrix),   
38.REG_JNI(register_android_graphics_MovIE),   
39.REG_JNI(register_android_graphics_NinePatch),   
40.REG_JNI(register_android_graphics_Paint),   
41.REG_JNI(register_android_graphics_Path),   
42.REG_JNI(register_android_graphics_PathMeasure),   
43.REG_JNI(register_android_graphics_PathEffect),   
44.REG_JNI(register_android_graphics_Picture),   
45.REG_JNI(register_android_graphics_PorterDuff),   
46.REG_JNI(register_android_graphics_Rasterizer),   
47.REG_JNI(register_android_graphics_Region),   
48.REG_JNI(register_android_graphics_Shader),   
49.REG_JNI(register_android_graphics_Typeface),   
50.REG_JNI(register_android_graphics_Xfermode),   
51.REG_JNI(register_com_android_internal_graphics_NativeUtils),  
52.REG_JNI(register_android_database_CursorWindow),   
53.REG_JNI(register_android_database_SQLiteDatabase),   
54.REG_JNI(register_android_database_SQLiteDebug),   
55.REG_JNI(register_android_database_SQLiteProgram),   
56.REG_JNI(register_android_database_SQLiteQuery),   
57.REG_JNI(register_android_database_SQLiteStatement),   
58.REG_JNI(register_android_os_Debug),   
59.REG_JNI(register_android_os_Exec),   
60.REG_JNI(register_android_os_FileObserver),   
61.REG_JNI(register_android_os_FileUtils),   
62.REG_JNI(register_android_os_ParcelFileDescriptor),   
63.REG_JNI(register_android_os_Power),   
64.REG_JNI(register_android_os_StatFs),   
65.REG_JNI(register_android_os_SystemPropertIEs),   
66.REG_JNI(register_android_os_UEventObserver),   
67.REG_JNI(register_android_net_LocalSocketImpl),   
68.REG_JNI(register_android_net_NetworkUtils),   
69.REG_JNI(register_android_net_wifi_WifiManager),   
70.REG_JNI(register_android_os_MemoryFile),   
71.REG_JNI(register_com_android_internal_os_ZygoteInit),   
72.REG_JNI(register_android_hardware_Camera),   
73.REG_JNI(register_android_hardware_SensorManager),   
74.REG_JNI(register_android_media_AudioRecord),   
75.REG_JNI(register_android_media_AudiOSystem),   
76.REG_JNI(register_android_media_AudioTrack),   
77.REG_JNI(register_android_media_JetPlayer),   
78.REG_JNI(register_android_media_ToneGenerator),   
79.REG_JNI(register_android_opengl_classes),   
80.REG_JNI(register_android_bluetooth_Database),   
81.REG_JNI(register_android_bluetooth_HeadsetBase),   
82.REG_JNI(register_android_bluetooth_BluetoothAudioGateway),  
83.REG_JNI(register_android_bluetooth_RfcommSocket),   
84.REG_JNI(register_android_bluetooth_ScoSocket),   
85.REG_JNI(register_android_server_BluetoothDeviceService),  
86.REG_JNI(register_android_server_BluetoothEventLoop),   
87.REG_JNI(register_android_server_BluetoothA2dpService),   
88.REG_JNI(register_android_message_digest_sha1),   
89.REG_JNI(register_android_ddm_DdmHandleNativeHeap),   
90.REG_JNI(register_android_util_Base64),   
91.REG_JNI(register_android_location_GpsLocationProvider),  
92.};  
vIEw plaincopy to clipboardprint?
01.static const RegJNIRec gRegJNI[] = {   
02.REG_JNI(register_android_debug_JNITest),   
03.REG_JNI(register_com_android_internal_os_RuntimeInit),   
04.REG_JNI(register_android_os_SystemClock),   
05.REG_JNI(register_android_util_EventLog),   
06.REG_JNI(register_android_util_Log),   
07.REG_JNI(register_android_util_FloatMath),   
08.REG_JNI(register_android_text_format_Time),   
09.REG_JNI(register_android_pim_EventRecurrence),   
10.REG_JNI(register_android_content_AssetManager),   
11.REG_JNI(register_android_content_StringBlock),   
12.REG_JNI(register_android_content_XMLBlock),   
13.REG_JNI(register_android_emoji_EmojiFactory),   
14.REG_JNI(register_android_security_Md5MessageDigest),   
15.REG_JNI(register_android_text_androidCharacter),   
16.REG_JNI(register_android_text_KeyCharacterMap),   
17.REG_JNI(register_android_os_Process),   
18.REG_JNI(register_android_os_Binder),   
19.REG_JNI(register_android_os_Hardware),   
20.REG_JNI(register_android_vIEw_Display),   
21.REG_JNI(register_android_nio_utils),   
22.REG_JNI(register_android_graphics_PixelFormat),   
23.REG_JNI(register_android_graphics_Graphics),   
24.REG_JNI(register_android_vIEw_Surface),   
25.REG_JNI(register_android_view_VIEwRoot),   
26.REG_JNI(register_com_google_android_gles_jni_EGLImpl),   
27.REG_JNI(register_com_google_android_gles_jni_GLImpl),   
28.REG_JNI(register_android_graphics_Bitmap),   
29.REG_JNI(register_android_graphics_BitmapFactory),   
30.REG_JNI(register_android_graphics_Camera),   
31.REG_JNI(register_android_graphics_Canvas),   
32.REG_JNI(register_android_graphics_ColorFilter),   
33.REG_JNI(register_android_graphics_DrawFilter),   
34.REG_JNI(register_android_graphics_Interpolator),   
35.REG_JNI(register_android_graphics_LayerRasterizer),   
36.REG_JNI(register_android_graphics_MaskFilter),   
37.REG_JNI(register_android_graphics_Matrix),   
38.REG_JNI(register_android_graphics_MovIE),   
39.REG_JNI(register_android_graphics_NinePatch),   
40.REG_JNI(register_android_graphics_Paint),   
41.REG_JNI(register_android_graphics_Path),   
42.REG_JNI(register_android_graphics_PathMeasure),   
43.REG_JNI(register_android_graphics_PathEffect),   
44.REG_JNI(register_android_graphics_Picture),   
45.REG_JNI(register_android_graphics_PorterDuff),   
46.REG_JNI(register_android_graphics_Rasterizer),   
47.REG_JNI(register_android_graphics_Region),   
48.REG_JNI(register_android_graphics_Shader),   
49.REG_JNI(register_android_graphics_Typeface),   
50.REG_JNI(register_android_graphics_Xfermode),   
51.REG_JNI(register_com_android_internal_graphics_NativeUtils),  
52.REG_JNI(register_android_database_CursorWindow),   
53.REG_JNI(register_android_database_SQLiteDatabase),   
54.REG_JNI(register_android_database_SQLiteDebug),   
55.REG_JNI(register_android_database_SQLiteProgram),   
56.REG_JNI(register_android_database_SQLiteQuery),   
57.REG_JNI(register_android_database_SQLiteStatement),   
58.REG_JNI(register_android_os_Debug),   
59.REG_JNI(register_android_os_Exec),   
60.REG_JNI(register_android_os_FileObserver),   
61.REG_JNI(register_android_os_FileUtils),   
62.REG_JNI(register_android_os_ParcelFileDescriptor),   
63.REG_JNI(register_android_os_Power),   
64.REG_JNI(register_android_os_StatFs),   
65.REG_JNI(register_android_os_SystemPropertIEs),   
66.REG_JNI(register_android_os_UEventObserver),   
67.REG_JNI(register_android_net_LocalSocketImpl),   
68.REG_JNI(register_android_net_NetworkUtils),   
69.REG_JNI(register_android_net_wifi_WifiManager),   
70.REG_JNI(register_android_os_MemoryFile),   
71.REG_JNI(register_com_android_internal_os_ZygoteInit),   
72.REG_JNI(register_android_hardware_Camera),   
73.REG_JNI(register_android_hardware_SensorManager),   
74.REG_JNI(register_android_media_AudioRecord),   
75.REG_JNI(register_android_media_AudiOSystem),   
76.REG_JNI(register_android_media_AudioTrack),   
77.REG_JNI(register_android_media_JetPlayer),   
78.REG_JNI(register_android_media_ToneGenerator),   
79.REG_JNI(register_android_opengl_classes),   
80.REG_JNI(register_android_bluetooth_Database),   
81.REG_JNI(register_android_bluetooth_HeadsetBase),   
82.REG_JNI(register_android_bluetooth_BluetoothAudioGateway),  
83.REG_JNI(register_android_bluetooth_RfcommSocket),   
84.REG_JNI(register_android_bluetooth_ScoSocket),   
85.REG_JNI(register_android_server_BluetoothDeviceService),  
86.REG_JNI(register_android_server_BluetoothEventLoop),   
87.REG_JNI(register_android_server_BluetoothA2dpService),   
88.REG_JNI(register_android_message_digest_sha1),   
89.REG_JNI(register_android_ddm_DdmHandleNativeHeap),   
90.REG_JNI(register_android_util_Base64),   
91.REG_JNI(register_android_location_GpsLocationProvider),  
92.};  
static const RegJNIRec gRegJNI[] = {
REG_JNI(register_android_debug_JNITest),
REG_JNI(register_com_android_internal_os_RuntimeInit),
REG_JNI(register_android_os_SystemClock),
REG_JNI(register_android_util_EventLog),
REG_JNI(register_android_util_Log),
REG_JNI(register_android_util_FloatMath),
REG_JNI(register_android_text_format_Time),
REG_JNI(register_android_pim_EventRecurrence),
REG_JNI(register_android_content_AssetManager),
REG_JNI(register_android_content_StringBlock),
REG_JNI(register_android_content_XMLBlock),
REG_JNI(register_android_emoji_EmojiFactory),
REG_JNI(register_android_security_Md5MessageDigest),
REG_JNI(register_android_text_androidCharacter),
REG_JNI(register_android_text_KeyCharacterMap),
REG_JNI(register_android_os_Process),
REG_JNI(register_android_os_Binder),
REG_JNI(register_android_os_Hardware),
REG_JNI(register_android_vIEw_Display),
REG_JNI(register_android_nio_utils),
REG_JNI(register_android_graphics_PixelFormat),
REG_JNI(register_android_graphics_Graphics),
REG_JNI(register_android_vIEw_Surface),
REG_JNI(register_android_view_VIEwRoot),
REG_JNI(register_com_google_android_gles_jni_EGLImpl),
REG_JNI(register_com_google_android_gles_jni_GLImpl),
REG_JNI(register_android_graphics_Bitmap),
REG_JNI(register_android_graphics_BitmapFactory),
REG_JNI(register_android_graphics_Camera),
REG_JNI(register_android_graphics_Canvas),
REG_JNI(register_android_graphics_ColorFilter),
REG_JNI(register_android_graphics_DrawFilter),
REG_JNI(register_android_graphics_Interpolator),
REG_JNI(register_android_graphics_LayerRasterizer),
REG_JNI(register_android_graphics_MaskFilter),
REG_JNI(register_android_graphics_Matrix),
REG_JNI(register_android_graphics_MovIE),
REG_JNI(register_android_graphics_NinePatch),
REG_JNI(register_android_graphics_Paint),
REG_JNI(register_android_graphics_Path),
REG_JNI(register_android_graphics_PathMeasure),
REG_JNI(register_android_graphics_PathEffect),
REG_JNI(register_android_graphics_Picture),
REG_JNI(register_android_graphics_PorterDuff),
REG_JNI(register_android_graphics_Rasterizer),
REG_JNI(register_android_graphics_Region),
REG_JNI(register_android_graphics_Shader),
REG_JNI(register_android_graphics_Typeface),
REG_JNI(register_android_graphics_Xfermode),
REG_JNI(register_com_android_internal_graphics_NativeUtils),
REG_JNI(register_android_database_CursorWindow),
REG_JNI(register_android_database_SQLiteDatabase),
REG_JNI(register_android_database_SQLiteDebug),
REG_JNI(register_android_database_SQLiteProgram),
REG_JNI(register_android_database_SQLiteQuery),
REG_JNI(register_android_database_SQLiteStatement),
REG_JNI(register_android_os_Debug),
REG_JNI(register_android_os_Exec),
REG_JNI(register_android_os_FileObserver),
REG_JNI(register_android_os_FileUtils),
REG_JNI(register_android_os_ParcelFileDescriptor),
REG_JNI(register_android_os_Power),
REG_JNI(register_android_os_StatFs),
REG_JNI(register_android_os_SystemPropertIEs),
REG_JNI(register_android_os_UEventObserver),
REG_JNI(register_android_net_LocalSocketImpl),
REG_JNI(register_android_net_NetworkUtils),
REG_JNI(register_android_net_wifi_WifiManager),
REG_JNI(register_android_os_MemoryFile),
REG_JNI(register_com_android_internal_os_ZygoteInit),
REG_JNI(register_android_hardware_Camera),
REG_JNI(register_android_hardware_SensorManager),
REG_JNI(register_android_media_AudioRecord),
REG_JNI(register_android_media_AudiOSystem),
REG_JNI(register_android_media_AudioTrack),
REG_JNI(register_android_media_JetPlayer),
REG_JNI(register_android_media_ToneGenerator),
REG_JNI(register_android_opengl_classes),
REG_JNI(register_android_bluetooth_Database),
REG_JNI(register_android_bluetooth_HeadsetBase),
REG_JNI(register_android_bluetooth_BluetoothAudioGateway),
REG_JNI(register_android_bluetooth_RfcommSocket),
REG_JNI(register_android_bluetooth_ScoSocket),
REG_JNI(register_android_server_BluetoothDeviceService),
REG_JNI(register_android_server_BluetoothEventLoop),
REG_JNI(register_android_server_BluetoothA2dpService),
REG_JNI(register_android_message_digest_sha1),
REG_JNI(register_android_ddm_DdmHandleNativeHeap),
REG_JNI(register_android_util_Base64),
REG_JNI(register_android_location_GpsLocationProvider),
};


 

這些初始化的native方法是Java代碼與底層服務打交道的接口，因此我們必須初始化這些方法。

以app_process啟動java class的另外一個好處是它會初始化IBinder，這樣就可以在Java代碼和jni代碼裡面接收IBinder消息。

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