Question

我想要的是什么： 在我的android项目中使用包含我所有模型类的jar文件（在我分离模型的webservice中重用）。我是android新手所以我想我错过了什么？在android中使用它时，是否有必要以不同的方式导出我的类？

我得到了什么：

`11-15 12:26:14.082: E/Trace(1776): error opening trace file: No such file or directory (2)
11-15 12:26:14.152: E/dalvikvm(1776): Could not find class 'ww.entities.model.User', referenced from method com.example.weightwatchersapp.MainActivity.onCreate
11-15 12:26:14.172: W/dalvikvm(1776): VFY: unable to resolve new-instance 812 (Lww/entities/model/User;) in Lcom/example/weightwatchersapp/MainActivity;
11-15 12:26:14.172: D/dalvikvm(1776): VFY: replacing opcode 0x22 at 0x000a
11-15 12:26:14.182: D/dalvikvm(1776): DexOpt: unable to opt direct call 0x1499 at 0x0c in Lcom/example/weightwatchersapp/MainActivity;.onCreate
11-15 12:26:14.212: W/System.err(1776): TEST
11-15 12:26:14.262: D/AndroidRuntime(1776): Shutting down VM
11-15 12:26:14.262: W/dalvikvm(1776): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
11-15 12:26:14.292: E/AndroidRuntime(1776): FATAL EXCEPTION: main
11-15 12:26:14.292: E/AndroidRuntime(1776): java.lang.NoClassDefFoundError: ww.entities.model.User
11-15 12:26:14.292: E/AndroidRuntime(1776):     at com.example.weightwatchersapp.MainActivity.onCreate(MainActivity.java:17)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.app.Activity.performCreate(Activity.java:5104)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.os.Looper.loop(Looper.java:137)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at android.app.ActivityThread.main(ActivityThread.java:5041)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at java.lang.reflect.Method.invokeNative(Native Method)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at java.lang.reflect.Method.invoke(Method.java:511)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
11-15 12:26:14.292: E/AndroidRuntime(1776):     at dalvik.system.NativeStart.main(Native Method)`

我做了什么： 为了生成它我使用了一个简单的java项目（不是库项目或类似的东西，并将其导出为jar。我可以在我的webservice java项目中使用相同的库而没有任何问题。

我尝试了什么： 1.使用自动生成的类MainActivity并添加以下代码：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    System.err.println("TEST");// TODO: error here
    User user = new User();
    user.setDailyPoints(13);
}

将ww-entities添加到libs文件夹
右键单击lib并选择“添加到构建路径”
清理项目
在“订单和导出”中检查了ww-entities.jar
在“订购和导出”中检查了Android私有库

我试图遵循许多线程，处理类似的问题，但不知何故，似乎我错过了重点。（不需要说我是新手Android并需要一个全面的答案，对于noobies吧？^^）

修改

I´m using ormlite with my models so i.e. my class User looks like:
public class User implements Serializable {
    private static final long serialVersionUID = -2057474913370787753L;
    @DatabaseField(generatedId = true)
    private long id;
    @DatabaseField(canBeNull = false, unique = true)
    private String username;
    @DatabaseField
    private String password;
    @DatabaseField
    private String email;
    @DatabaseField
    private String forename;
    @DatabaseField
    private String surname;
    @DatabaseField
    private Date birthday;
    @DatabaseField
    private String sex;
    @DatabaseField
    private double height;
    @DatabaseField
    private int dailyPoints;
    @DatabaseField
    private int weeklyPoints;
    @DatabaseField(foreign = true, foreignAutoCreate = true, foreignAutoRefresh = true)
    private OnlineUserFlags onlineUserFlags;
    @DatabaseField
    private boolean showProfileOnline;

    public User() {
    }

    public User(String username, String password, String email, String forename, String surname, Date birthday, String sex, double height, int dailyPoints, int weeklyPoints, OnlineUserFlags onlineUserFlags, boolean showProfileOnline) {
        super();
        this.username = username;
        this.password = password;
        this.email = email;
        this.forename = forename;
        this.surname = surname;
        this.birthday = birthday;
        this.sex = sex;
        this.height = height;
        this.dailyPoints = dailyPoints;
        this.weeklyPoints = weeklyPoints;
        this.onlineUserFlags = onlineUserFlags;
        this.showProfileOnline = showProfileOnline;
    }

    @Override
    public int hashCode() {
        //generated hascode method
    }

    @Override
    public boolean equals(Object obj) {
    //generated equals method
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }
    //...getters/setters  
}

Answer 1

最简单的方法（至少在SDK工具0.22.2.1中）是不导出jar，而是将你的ww-entities项目添加为你的android项目的依赖项（Build Path＆gt;项目）。

然后，您需要确保在订单和导出标签中查看ww-entities。

将.jar包含到android项目中（NoClassDefFoundError - VFY：无法解析新实例812）

1 个答案: