Question

需要在这里挖掘集体的脑力。我正在尝试一个非常简单的BindService并与Messenger示例进行通信。由于我在Message.obj字段中传递消息对象，因此我在自己的Android库项目中定义了消息，以便在服务和客户端之间共享。我可以通过将消息库包含为depdendency来编译，但在运行时dalvikvm抱怨它无法找到类。我已经阅读了有关出口和订单的其他相关问题，但同样的解决方案对我的情况没有帮助。这肯定是一个非常简单的错误，但我现在正在把头发拉出来。

应用程序取决于SupportServiceMessageLibrary。

App在项目的顺序选项卡中的src之前有库。

在App中未检查Lib导出，因为没有人正在使用App

图书馆正在导出其src和gen文件夹。

来自log cat的错误消息：

01-31 01:53:41.134: E/dalvikvm(22886): Could not find class 'com.example.service.RequestStatus', referenced from method com.example.MainActivity$ServiceReplyHandler.handleMessage

以下是代码片段

MainActivity

package com.example;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.view.Menu;
import android.widget.TextView;

import com.example.appserver.R;
import com.example.service.MessageType;
import com.example.service.RequestStatus;

public class MainActivity extends Activity {

private TextView serverStatus;

/** Messenger for sending message to service. */
Messenger mServiceMessenger = null;

/** Flag indicating whether we have called bind on the service. */
boolean mBound;

/** Messenger for receiving message from service */
Messenger mClientMessenger = null;

class ServiceReplyHandler extends Handler {
    @Override
    public void handleMessage(Message msg) {
        if (msg.what == MessageType.MSG_REPLY) {
            RequestStatus reqStatus = (RequestStatus) msg.obj;
        }
    }
}

/**
 * Class for interacting with the main interface of the service.
 */
private ServiceConnection mConnection = new ServiceConnection() {
    public void onServiceConnected(ComponentName className, IBinder service) {
        // This is called when the connection with the service has been
        // established, giving us the object we can use to
        // interact with the service. We are communicating with the
        // service using a Messenger, so here we get a client-side
        // representation of that from the raw IBinder object.
        mServiceMessenger = new Messenger(service);
        Message regMsg = Message.obtain(null,
                MessageType.MSG_REGISTER);
        regMsg.replyTo = mClientMessenger;
        try {
            mServiceMessenger.send(regMsg);
        } catch (RemoteException e) {
        }
        mBound = true;
    }

    public void onServiceDisconnected(ComponentName className) {
        // This is called when the connection with the service has been
        // unexpectedly disconnected -- that is, its process crashed.
        mServiceMessenger = null;
        mBound = false;
    }
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_server);
    serverStatus = (TextView) findViewById(R.id.server_status);

    Intent startServiceIntent = new Intent();
    startServiceIntent.setComponent(new ComponentName(
            "com.example.supportservices",
            "com.example.service.EntitlementService"));
    bindService(startServiceIntent, mConnection, Context.BIND_AUTO_CREATE);

    // Initialize messenger to receiver service messages;
    mClientMessenger = new Messenger(new ServiceReplyHandler());
}

@Override
protected void onStop() {
    super.onStop();
}

@Override
protected void onStart() {
    super.onStart();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.server, menu);
    return true;
}
}

信息本身

package com.example.service;

import org.json.JSONException;
import org.json.JSONObject;

import android.text.TextUtils;

public class RequestStatus {

public static int REQUEST_SUCCESS = 0;
public static int REQUEST_FAILURE = 1;
public static String TYPE = "request_status";
public static String STATUS_JSON_KEY = "status";

private int status;

public RequestStatus(int status) {
    this.status = status;
}

public static RequestStatus fromJson(String json) {

    try {
        JSONObject msg = new JSONObject(json);
        String type = msg.getString("type");
        if (TextUtils.isEmpty(type) || TYPE.equals(type) == false) {
            return null;
        }
        return(new RequestStatus(msg.getJSONObject("body").getInt(STATUS_JSON_KEY)));
    } catch (JSONException e) {
        return null;
    }
}

public String toJson() {
    JSONObject msg = new JSONObject();
    try {
        msg.put("type", TYPE);
        JSONObject body = new JSONObject();
        body.put(STATUS_JSON_KEY, status);
        msg.put("body", body);
    } catch (JSONException e) {
        return null;
    }
    return msg.toString();
}
}

Answer 1

转到App的项目属性，并将其添加为Android下的库以及构建路径下的项目依赖项。

DalvikVm找不到类android库项目

1 个答案: