你好,我正在尝试从可绘制资源的Uri中获取File对象。我使用以下代码:
jclass clazz;
jmethodID methodID;
jstring string1, string2, string3;
jobject object1, object2;
clazz = env->FindClass("android/net/Uri");
methodID = env->GetStaticMethodID(clazz, "parse", "(Ljava/lang/String;)Landroid/net/Uri;");
string1 = env->NewStringUTF("android.resource://com.appsite.android/drawable/grass");
object1 = env->CallStaticObjectMethod(clazz, methodID, string1);
methodID = env->GetMethodID(clazz, "toString", "()Ljava/lang/String;");
string1 = (jstring)env->CallObjectMethod(object1, methodID);
clazz = env->FindClass("java/net/URLEncoder");
methodID = env->GetStaticMethodID(clazz, "encode", "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;");
string2 = (jstring)env->NewStringUTF("UTF-8");
string3 = (jstring)env->CallStaticObjectMethod(clazz, methodID, string1, string2);
clazz = env->FindClass("java/net/URI");
methodID = env->GetMethodID(clazz, "<init>", "(Ljava/lang/String;)V");
object1 = env->NewObject(clazz, methodID, string3);
clazz = env->FindClass("java/io/File");
methodID = env->GetMethodID(clazz, "<init>", "(Ljava/net/URI;)V");
object2 = env->NewObject(clazz, methodID, object1);
应用程序在最后一次调用
NewObject
时崩溃。可能的原因是什么?编辑:
似乎是将
jobject
作为参数传递给NewObject
的问题。正确传递jobject
的方法是什么?
jobject
没什么特别的。 - Michael