Question

我想通过Android上的后台服务将一些数据上传到Parse.com上的数据库。我之前在活动中使用过Parse并用于在onCreate（）方法中编写以下行：

Parse.enableLocalDatastore(this);
    Parse.initialize(this, "kw0FN094jFEtdCMrYXNgSYo3wqKhXAEm2RBcLDEq", "AKLRbWFt0ZhWqw1huWA0avuk9iQB7Z1qKVHXSslj");

当我尝试将相同内容添加到我的服务中，然后从我的Android应用程序调用该服务时，logcat会显示以下错误：

07-07 19:43:27.393    1053-1578/com.example.shikhar.trackmydevice E/AndroidRuntime﹕ FATAL EXCEPTION: IntentService[UploadService]
Process: com.example.shikhar.trackmydevice, PID: 1053
java.lang.IllegalStateException: `Parse#enableLocalDatastore(Context)` must be invoked before `Parse#initialize(Context)`
        at com.parse.Parse.enableLocalDatastore(Parse.java:65)
        at com.example.shikhar.trackmydevice.UploadService.onHandleIntent(UploadService.java:81)
        at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.os.HandlerThread.run(HandlerThread.java:61)

我还在AndroidManifest.xml中声明了我的服务。这是一个片段：

    <service android:enabled="true" android:name="com.example.shikhar.appname.UploadService"/>

</application>

这是我上传服务的代码：

package com.example.shikhar.appname;

import android.app.IntentService;
import android.content.Intent;

import android.util.Log;

import com.parse.FindCallback;
import com.parse.GetCallback;
import com.parse.Parse;
import com.parse.ParseObject;
import com.parse.ParseQuery;


public class UploadService extends IntentService {

protected static final String TAG = "UploadService: ";



public UploadService() {
    super("UploadService");
}

/**
 * The IntentService calls this method from the default worker thread with
 * the intent that started the service. When this method returns, IntentService
 * stops the service, as appropriate.
 */

@Override
protected void onHandleIntent(Intent intent) {

    Parse.enableLocalDatastore(this);
    Parse.initialize(this, "kw0FN094jFEtdCMrYXNgSYo3wqKhXAEm2RBcLDEq", "AKLRbWFt0ZhWqw1huWA0avuk9iQB7Z1qKVHXSslj");



}

@Override
public void onDestroy() {
    }
}

我从主Activity中的单个ImageButton开始并停止服务。这是我的Activity的onCreate（）中的代码：

btnService.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(thisActivity, UploadService.class);

            if(serviceIsRunning(UploadService.class))
            {
                stopService(intent);
            }
            else
            {
                startService(intent);
            }

            if(serviceIsRunning(UploadService.class))
            {
                btnService.setImageResource(R.mipmap.ic_service_stop);
            }
            else
            {
                btnService.setImageResource(R.mipmap.ic_service_start);

            }


        }
    });

上面的代码使用myActivity类中onCreate之外定义的以下方法：

 protected boolean serviceIsRunning(Class<?> serviceClass) {
    ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
        if (serviceClass.getName().equals(service.service.getClassName())) {
            return true;
        }
    }
    return false;
}

请建议我。我该怎么办？

Answer 1

您可以尝试在自定义应用程序中初始化解析，因此您不必在每个活动或服务中对其进行初始化：

public class MyAplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        Parse.enableLocalDatastore(this);
        Parse.initialize(this, "XXXX", "XXXX");
    }
}

然后在AndroidManifest.xml中添加名称：

<application
    android:name=".MyAplication"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

在Android Intent Service中使用Parse.com

1 个答案: