谷歌活动识别API

Question

我将使用google play services活动识别api编写一个应用程序。android开发者网站上的培训是直接进行的，但在过去的几个小时里，我编写了一个简单的html" target="_blank">应用程序，但没有得到任何结果。更新：实际上，我将在5秒钟的时间间隔内以toast消息的形式显示用户的当前活动（如ActivityRecognitionService-Intent服务中的OnIntentHandler方法所示）。我认为调用Intent有问题，因为正如您在我的代码中看到的，toast表示ActivityRecognitionClient是通过OnConnected方法连接的。

我错过什么了吗？

提前谢谢。

清单文件：

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.nikapps.activityrecognition"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <uses-permission
    android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION"/>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <service
        android:name="com.nikapps.activityrecognition.ActivityRecognitionService"
        android:label="@string/app_name"
        android:exported="false">
        </service>
        <activity
            android:name="com.nikapps.activityrecognition.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

主要活动。Java语言

    package com.nikapps.activityrecognition;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient.ConnectionCallbacks;
import com.google.android.gms.common.GooglePlayServicesClient.OnConnectionFailedListener;
import com.google.android.gms.location.ActivityRecognitionClient;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends FragmentActivity implements ConnectionCallbacks, OnConnectionFailedListener{

    public static int intervals = 5000;
    private PendingIntent pendingIntent;
    private ActivityRecognitionClient activityRecognition;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        activityRecognition = new ActivityRecognitionClient(this, this, this);
        activityRecognition.connect();
    }

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

    @Override
    public void onConnectionFailed(ConnectionResult result) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onConnected(Bundle connectionHint) {
        // TODO Auto-generated method stub
        Toast.makeText(this, "connected", Toast.LENGTH_SHORT).show();

        Intent intent = new Intent(this, ActivityRecognitionService.class);

        pendingIntent = PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        activityRecognition.requestActivityUpdates(0, pendingIntent);
    }

    @Override
    public void onDisconnected() {
        // TODO Auto-generated method stub
        Toast.makeText(this, "disconnected", Toast.LENGTH_SHORT).show();

    }

}

ActivityRecognitionService。Java语言

    package com.nikapps.activityrecognition;

import com.google.android.gms.location.ActivityRecognitionResult;
import com.google.android.gms.location.DetectedActivity;

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

public class ActivityRecognitionService extends IntentService{

    public ActivityRecognitionService() {
        super("ActivityRecognitionService");
        Toast.makeText(this, "here", Toast.LENGTH_SHORT).show();
        // TODO Auto-generated constructor stub
    }

    @Override
    protected void onHandleIntent(Intent intent) {

        // TODO Auto-generated method stub

        Toast.makeText(this, "here2", Toast.LENGTH_SHORT).show();
        ActivityRecognitionResult result = ActivityRecognitionResult.extractResult(intent);
        DetectedActivity activity = result.getMostProbableActivity();
        int type = activity.getType();

        Toast.makeText(this, getNameFromType(type), Toast.LENGTH_SHORT).show();

    }

    private String getNameFromType(int activityType) {
        switch(activityType) {
            case DetectedActivity.IN_VEHICLE:
                return "in_vehicle";
            case DetectedActivity.ON_BICYCLE:
                return "on_bicycle";
            case DetectedActivity.ON_FOOT:
                return "on_foot";
            case DetectedActivity.STILL:
                return "still";
            case DetectedActivity.UNKNOWN:
                return "unknown";
            case DetectedActivity.TILTING:
                return "tilting";
        }
        return "unknown";
    }
}

Answer 1

只能从设置了处理程序/循环器的线程调用Toast。要实现你的设想，你有两个选择

1. 使用IntentService的广播，并拥有一个具有显示UI的BroadcastRecencer的活动。这样，当活动不在前台时，就不会显示祝酒词。在您的onResume（）/onPrett（）中注册/注销接收器
2. 创建一个处理程序并在Handler.post中调用您的方法（new Runnable（）{...}）

从服务Android调用吐司时出错

Answer 2

您可以广播从服务向主类发送消息的意图，例如，在ActivityRecognitionService中使用以下内容。java：

Intent mIntent = new Intent("myCustomIntentMessage")
    .putExtra("ActivityType", getNameFromType(type));
getLocalBroadcast().sendBroadcast(mIntent);

然后，您只需在MainActivity上注册“myCustomIntentMessage”的广播接收器。java并将Toast消息代码放入广播接收器OnReceive事件中。