JNI进程守护 c代码部分如下：
JNIEXPORT void JNICALL Java_com_sharetimes_qude_jni_JNIDaemon_daemon(JNIEnv * env, jobject obj,jstring packageDir,jint sdkVersion,jstring user) {
char * pd = Jstring2CStr(env, packageDir);
pid_t pid = fork();
if (pid < ) {
LOGD("create process failure");
exit();
} else if (pid > ) {
//pid_r=wait(NULL);
} else {
while (JNI_TRUE) {
pid_t sid_r,sid;
sid = fork();
//创建捕捉子进程退出信号
if(sid == ) {
LOGD("app run create");
if (sdkVersion >= ) {
execlp("am", "am", "startservice", "--user","", "-n","com.sharetimes.qude/.service.StartService", (char*) );
}
else {
execlp("am", "am", "startservice", "-n","com.sharetimes.qude/.service.StartService", (char*) );
}
sleep(); //等待子线程
} else if(sid<) {
exit();
} else {
LOGD("app run clear");
sid_r = wait(NULL);
}
FILE* file = fopen(pd, "rt");
if(file == NULL) {
LOGD("app run daemon exit");
exit();
}
fclose(file);
if(file != NULL) {
free(file);
file==NULL;
}
sleep();
}
}
}
Java代码调用
public class JNIDaemon {
public native void daemon(String packageDir, int sdkVersion, String user);
public void init(Context context) {
String packageDir = "/data/data/" + context.getPackageName();
daemon(packageDir, android.os.Build.VERSION.SDK_INT, context.getApplicationInfo().uid + "");
}
}JNI 卸载后跳转指定网页
c代码如下：
/**
* 返回值 char* 这个代表char数组的首地址
* Jstring2CStr 把java中的jstring的类型转化成一个c语言中的char 字符串
*/
char* Jstring2CStr(JNIEnv* env, jstring jstr) {
char* rtn = NULL;
jclass clsstring = (*env)->FindClass(env, "java/lang/String"); //String
jstring strencode = (*env)->NewStringUTF(env, "GB2312"); // 得到一个java字符串 "GB2312"
jmethodID mid = (*env)->GetMethodID(env, clsstring, "getBytes",
"(Ljava/lang/String;)[B"); //[ String.getBytes("gb2312");
jbyteArray barr = (jbyteArray)(*env)->CallObjectMethod(env, jstr, mid,
strencode); // String .getByte("GB2312");
jsize alen = (*env)->GetArrayLength(env, barr); // byte数组的长度
jbyte* ba = (*env)->GetByteArrayElements(env, barr, JNI_FALSE);
if (alen > ) {
rtn = (char*) malloc(alen + ); //"\0"
memcpy(rtn, ba, alen);
rtn[alen] = ;
}
(*env)->ReleaseByteArrayElements(env, barr, ba, ); //
return rtn;
} JNIEXPORT void JNICALL Java_com_sharetimes_qude_jni_JNIUninstall_uninstall(JNIEnv * env, jobject obj, jstring packageDir, jint sdkVersion ,jstring parameter,jstring user) {
// 1，将传递过来的java的包名转为c的字符串
char * pd = Jstring2CStr(env, packageDir);
char * para=Jstring2CStr(env, parameter);
char url[];
strcpy (url,"http://vic.i.angjoy.com:8080/uninstall/index.jsp?");
strcat (url,para);
puts (url); char * userid= Jstring2CStr(env,user);
// 2，创建当前进程的克隆进程
pid_t pid = fork();
// 3，根据返回值的不同做不同的操作,<0,>0,=0
if (pid < ) {
exit();
} else if (pid > ) {
} else { while (JNI_TRUE) {
FILE* file = fopen(pd, "rt"); if (file == NULL) {
if (sdkVersion >= ) {
// Android4.2系统之后支持多用户操作，所以得指定用户
execlp("am", "am", "start", "--user", "", "-a","android.intent.action.VIEW", "-d",url, (char*) NULL);
} else {
// Android4.2以前的版本无需指定用户
execlp("am", "am", "start", "-a","android.intent.action.VIEW", "-d",url, (char*) NULL);
}
LOGD("app run uninstall exit");
exit();
} else {
// 应用没有被卸载
LOGD("app run normal");
}
fclose(file);
if(file != NULL) {
free(file);
file==NULL;
} sleep();
} }
}
Java代码调用：
public class JNIUninstall {
static {
System.loadLibrary("uninstall");
}
private String imei;
private String phones;
private String Versions;
private String chanels;
private String imsi;
public native void uninstall(String packageDir, int sdkVersion, String parameter, String uid);
public void init(Context context) {
String packageDir = "/data/data/" + context.getPackageName();
int sdkVersion = android.os.Build.VERSION.SDK_INT;
TelephonyManager mTelephonyMgr = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
ApplicationInfo info;
try {
info = context.getPackageManager().getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA);
PackageInfo pInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
imsi = mTelephonyMgr.getSubscriberId();
imei = mTelephonyMgr.getDeviceId();
phones = android.os.Build.MODEL;
Versions = pInfo.versionName;
chanels = info.metaData.getString("ZHUGE_CHANNEL");
} catch (NameNotFoundException e) {
e.printStackTrace();
}
String parameter = "m=" + imei + "&m1=" + imsi + "&model=" + phones + "&v=" + Versions + "&ch=" + chanels + "&sdk_int=" + sdkVersion;
uninstall(packageDir, sdkVersion, parameter, context.getApplicationInfo().uid + "");
}
}