服务未启动

Question

对你们来说，这可能是一个简单的问题，但这是我第一次尝试创建一个应该在我的应用程序关闭时在后台运行的服务。我的问题是:当我点击“开始服务”按钮时，服务不会启动。我没有看到任何的祝酒词，也没有在逻辑猫(也没有错误)。提前感谢！

服务类

public class MyService extends Service {
private static final String TAG = "MyService";

@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onCreate() {
    Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onCreate");

}

@Override
public void onDestroy() {
    Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onDestroy");

}

@Override
public void onStart(Intent intent, int startid) {
    Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onStart");

}
}

我的主要活动

public void startServiceClick(View v){

    Log.d("foo", "onClick: starting srvice");
    startService(new Intent(this, MyService.class));
}

public void stopServiceClick(View v){

    Log.d("foo", "onClick: stopping srvice");
    stopService(new Intent(this, MyService.class));
}

报表xml

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

<uses-sdk android:minSdkVersion="15" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.BLUETOOTH"/>

<application
    android:icon="@drawable/maps1"
    android:label="@string/app_name" >
    <uses-library android:name="com.google.android.maps" />
    <activity
        android:name=".LongitudeActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".DebugActivity" />
    <activity android:name=".GoogleMapsActivity" />

    <service android:enabled="true" android:name=".MyService" />

</application>

</manifest>

Answer 1

this is suggestion as all else looking fine 

应该在每个函数中调用超级函数，如super.onCreate();

可能的话，服务已经启动，试着停止并重新启动并检查一下.

试一试

<service android:enabled="true" android:name="se.johanberntsson.servies.MyService" />

Answer 2

你可能已经搞清楚了。在您的代码中，您覆盖了几个本机函数，这样您就可以添加toast和catlog条目。不要忘记添加Super.{您正在调用的任何函数}。这就是告诉android设备做任何功能，如果功能没有被过度，然后做额外的东西。在您的情况下，如果您调用oncreate函数，那么计算机就会发出祝酒词，并添加一个catlog条目，但它不会创建服务。

@Override    //forget about doing whatever onCreate usually does.
        public void onCreate() {
                        Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();//toast
            Log.d(TAG, "onCreate");//Add message to cat- log
            //note: Service not created because function was overrided
        }

然而，如果您添加super.onCreate，电话将创建服务，然后它将执行您要求它做的事情。

@Override    //forget about doing whatever onCreate usually does.
    public void onCreate() {
        super.onCreate(); // do whatever onCreate usually does. Then do whatever is after me.
        Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();//toast
        Log.d(TAG, "onCreate");//Add message to cat- log

    }

我希望这能帮到你。

Answer 3

我将您的服务添加到我的代码中，它对我很好。请参阅下面的代码，并与您的匹配。

活性>>

 public class TestActivity extends Activity implements OnClickListener {
   /** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button bt = (Button)findViewById(R.id.button11);
    bt.setOnClickListener(this);
}


public void startServiceClick(View v){

    Log.d("foo", "onClick: starting srvice");
    startService(new Intent(this, MyService.class));
}

public void stopServiceClick(View v){

    Log.d("foo", "onClick: stopping srvice");
    stopService(new Intent(this, MyService.class));
}

@Override
public void onClick(View v) {
    startServiceClick(v);   

}

清单文件>>

   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk android:minSdkVersion="8" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:name=".TestActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
  <service android:enabled="true" android:name=".MyService" />

</application>

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