/**
- 获取Context对象
- @param env
- @return
*/
static jobject getApplication(JNIEnv *env) {
jobject application = NULL;
//反射ActivityThread
jclass activity_thread_clz = env->FindClass("android/app/ActivityThread");
if (activity_thread_clz != NULL) {
//反射currentApplication方法
jmethodID currentApplication = env->GetStaticMethodID(
activity_thread_clz, "currentApplication", "()Landroid/app/Application;");
if (currentApplication != NULL) {
//执行反射currentApplication方法
application = env->CallStaticObjectMethod(activity_thread_clz, currentApplication);
} else {
LOGE("Cannot find method: currentApplication() in ActivityThread.");
}
//释放内存
env->DeleteLocalRef(activity_thread_clz);
} else {
LOGE("Cannot find class: android.app.ActivityThread");
}
return application;
}
/**
- 反射getSharedPreferences获取SharedPreferences对象
- @param env
- @param fileName
- @return
*/
jobject getSharedPreferencesNative(JNIEnv *env,const char *fileName) {
//反射Context类
jclass cls_Context = env->FindClass("android/content/Context");
//反射Context类getSharedPreferences方法
jmethodID mid_getSharedPreferences = env->GetMethodID(cls_Context,
"getSharedPreferences",
"(Ljava/lang/String;I)Landroid/content/SharedPreferences;");
//反射Context类MODE_PRIVATE属性
jfieldID fid_MODE_PRIVATE = env->GetStaticFieldID(cls_Context, "MODE_PRIVATE", "I");
//获取Context类MODE_PRIVATE属性值
jint int_MODE_PRIVATE = env->GetStaticIntField(cls_Context, fid_MODE_PRIVATE);
//参数类型转换
jstring o_prefs_name = Str2Jstring(env, fileName);
//执行反射方法
jobject obj_sharedPreferences = env->CallObjectMethod(getApplication(env),
mid_getSharedPreferences, o_prefs_name,
int_MODE_PRIVATE);
//释放内存
env->DeleteLocalRef(cls_Context);
env->DeleteLocalRef(o_prefs_name);
return obj_sharedPreferences;
}
/**
- 设置key值
- @param env
- @param fileName
- @param keyName
- @param value
- @return
*/
bool setKey(JNIEnv *env,const char *fileName,const char keyName, const char value) {
//反射getSharedPreferences获取SharedPreferences对象
jobject obj_sharedPreferences = getSharedPreferencesNative(env, fileName);
//反射SharedPreferences
jclass cls_SharedPreferences = env->FindClass("android/content/SharedPreferences");
//反射SharedPreferencesEditor");
//反射edit方法
jmethodID mid_edit = env->GetMethodID(cls_SharedPreferences,
"edit", "()Landroid/content/SharedPreferencesEditor;");
//反射commit方法
jmethodID mid_commit = env->GetMethodID(cls_SharedPreferencesEditor, "commit", "()Z");
//执行edit方法
jobject obj_editor = env->CallObjectMethod(obj_sharedPreferences, mid_edit);
//参数类型转换
jstring str_keyLicense = Str2Jstring(env, keyName);
//参数类型转换
jstring str_value = Str2Jstring(env, value);
//执行putString方法
env->CallObjectMethod(obj_editor, mid_putString, str_keyLicense, str_value);
//执行commit方法
jboolean jb_commit = env->CallBooleanMethod(obj_editor, mid_commit);
//释放内存
env->DeleteLocalRef(cls_SharedPreferences);
env->DeleteLocalRef(cls_SharedPreferencesEditor);
env->DeleteLocalRef(obj_sharedPreferences);
env->DeleteLocalRef(obj_editor);
env->DeleteLocalRef(str_keyLicense);
env->DeleteLocalRef(str_value);
return jb_commit;
}
/ - 读取key值
- @param env
- @param fileName
- @param keyName
- @param defValue
- @return
*/
jstring getKey(JNIEnv *env,const char *fileName,const char *keyName, const char *defValue) {
//反射getSharedPreferences获取SharedPreferences对象
jobject obj_sharedPreferences = getSharedPreferencesNative(env, fileName);
//反射SharedPreferences类
jclass cls_SharedPreferences = env->FindClass("android/content/SharedPreferences");
//反射SharedPreferences类的getString方法
jmethodID mid_getString = env->GetMethodID(cls_SharedPreferences,
"getString",
"(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;");
//参数类型转换
jstring key_name = env->NewStringUTF(keyName);
//参数类型转换
jstring default_value = env->NewStringUTF(defValue);
//执行反射方法
jstring str_keyLicenseValue = (jstring) env->CallObjectMethod(obj_sharedPreferences,
mid_getString, key_name, default_value);
//释放内存
env->DeleteLocalRef(obj_sharedPreferences);
env->DeleteLocalRef(cls_SharedPreferences);
env->DeleteLocalRef(key_name);
env->DeleteLocalRef(default_value);
return str_keyLicenseValue;
}
/**
- 反射getSharedPreferences获取SharedPreferences对象
- @param env
- @param fileName
- @return
*/
jstring getPackageNameNative(JNIEnv *env) {
//反射Context类
jclass cls_Context = env->FindClass("android/content/Context");
//反射Context类getPackageName方法
jmethodID mid_getPackageName = env->GetMethodID(cls_Context,
"getPackageName",
"()Ljava/lang/String;");
//执行反射方法
jstring packageName =(jstring) env->CallObjectMethod(getApplication(env),
mid_getPackageName);
//释放内存
env->DeleteLocalRef(cls_Context);
return packageName;
}
