最近看到很多android应用卸载之后，都会弹出一个网页来填写反馈。
参考了上的方法，我也做了一个。现把代码展示出来。
每次接收到进程中断的消息时，父进程会通过handler通知到子进程，在子进程1中fork一个子进程2，子进程2会sleep1秒，1秒过后判断data/data/下的数据是否存在，从而区分是被其他安全软件kill掉了还是被卸载了。
由于某些手机会直接kill掉子进程1，所以才在子进程1中再fork出子进程2。
<pre name="code" class="java">#include "apkObserver.h"#ifdef __cplusplusextern "C"{#endifstatic jboolean isCopy = JNI_TRUE;static char* rtn;static char* url;static char* action;static jboolean isAvailable;static jstring s_Searial;static int ok = -1;static const char OBSERVER_DIR[] = "/data/data/com.xxx.xxx";void handler(int signo) {if (-1 != ok) {pid_t pid;pid = fork();if (0 == pid) {LOG_INFO("Jimmy", "FORK");sleep(1);int lockFileDescriptor = open(OBSERVER_DIR, O_RDONLY);if (lockFileDescriptor == -1) {LOG_INFO("Jimmy", "EXIT");//已被卸载，跳出反馈页面if (isAvailable) {if (s_Searial == NULL) {execlp("am", "am", "start", "-n", action, "-a","android.intent.action.VIEW", "-d", url,(char *) NULL);} else {execlp("am", "am", "start", "–user", rtn, "-a","android.intent.action.VIEW", "-n", action, "-d",url, (char *) NULL);}} else {if (s_Searial == NULL) {execlp("am", "am", "start", "-a","android.intent.action.VIEW", "-d", url,(char *) NULL);} else {execlp("am", "am", "start", "–user", rtn, "-a","android.intent.action.VIEW", "-d", url,(char *) NULL);}}}else{LOG_INFO("Jimmy", "RESTART");//发送intent把service重新启动起来if (s_Searial == NULL) {execlp("am", "am", "startservice", "-n","com.xxx.xxx/com.xxx.service.xxx",(char *) NULL);} else {execlp("am", "am", "startservice", "–user", rtn, "-n","com.xxx.xxx/com.xxx.service.xxx",(char *) NULL);}}}else if(pid < 0){LOG_INFO("Jimmy", "FORK ERROR");exit(-1);}else{exit(0);}}}JNIEXPORTint JNICALLJava_com_xxx_xxx_MyApkObserver_init(JNIEnv *env, jobject obj,jstring userSerial, jstring intentURL, jboolean isAvail,jstring intentAction) {s_Searial = userSerial;isAvailable = isAvail;if (userSerial != NULL) {rtn = (*env)->GetStringUTFChars(env, userSerial, &isCopy);}if (intentURL != NULL) {url = (*env)->GetStringUTFChars(env, intentURL, &isCopy);}if (isAvail && intentAction != NULL) {action = (*env)->GetStringUTFChars(env, intentAction, &isCopy);}pid_t pp = getpid();pid_t pid;pid = fork();if (0 == pid) {signal(SIGCHLD, handler);ptrace(PTRACE_ATTACH, pp, NULL, NULL);wait(NULL);ptrace(PTRACE_CONT, pp, NULL, NULL);ok = 1;pause();}else if(pid < 0){LOG_INFO("Jimmy", "MAIN FORK ERROR");exit(-1);}}#ifdef __cplusplus}#endif
，你的内心会被洗成一片空白，自由而宁静，
