Question

我将在Android应用程序启动时启动服务。代码以下列方式编写。不幸的是，这段代码没有产生预期的效果。有人能告诉我这段代码有什么问题吗？非常感谢。

清单文件：

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

    <service
        android:name=".BootTimeService">
        <!--android:enabled="true"
        android:exported="true" -->
        <intent-filter>
                <action android:name=".BootTimeService"/>
                <!-- action android:name="android.intent.action.MAIN" / -->
                <!-- category android:name="android.intent.category.LAUNCHER" / -->
            </intent-filter>
        </service>

        <receiver
            android:name=".RunBootTimeServiceReciver"
            android:enabled="true">
            <!--android:exported="true" -->
            <action android:name="android.intent.action.BOOT_COMPLETED" />

            <!--category android:name="android.intent.category."/-->
        </receiver>
    </application>

</manifest>

BootTimeService类：

public class BootTimeService extends Service {
    //region constants
    private static final String TAG = BootTimeService.class.getSimpleName();
   //public static final int SERVERPORT = 8080;
    //endregion
    //************************

    public BootTimeService() {
    }

    //region override methods
    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    // This is the old onStart method that will be called on the pre-2.0
    // platform.  On 2.0 or later we override onStartCommand() so this
    // method will not be called.
    @Override
    public void onStart(Intent intent, int startId) {
        //handleCommand(intent);
        Log.i(TAG, "onStart");
        Toast.makeText(getApplicationContext(), "onStart", Toast.LENGTH_LONG).show();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        //handleCommand(intent);
        // We want this service to continue running until it is explicitly
        // stopped, so return sticky.
        Log.i(TAG, "onStartCommand");
        Toast.makeText(getApplicationContext(), "onStartCommand",   Toast.LENGTH_LONG).show();
        return START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.i(TAG, "Service creating");
        Toast.makeText(getApplicationContext(), "Service is created",   Toast.LENGTH_LONG).show();
//        try {
//            server = HttpServer.create(new InetSocketAddress(SERVERPORT), 0);
//            server.createContext("IS2", new IS2Handler());
//            server.createContext("DSP", new DSPHandler());
//            server.setExecutor(Executors.newFixedThreadPool(0x5) ); // creates a     default executor
//            server.start();
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.i(TAG, "Service destroying");
        //server.stop(0x1);
    }
    //endregion
    //************************
}

RunBootTimeServiceReciver类：

public class RunBootTimeServiceReciver extends BroadcastReceiver {
//    public RunBootTimeServiceReciver() {
//    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Log.i("reciver", "Before start backgroud service");
        Toast.makeText(context, "BackGroundService", Toast.LENGTH_LONG).show();
        Intent startServiceIntent = new Intent(context, BootTimeService.class);
        context.startService(startServiceIntent);
    }
}

Answer 1

您至少需要1项活动。此活动正在执行任何操作，但应在清单文件中指定。像这样：

修改

<强>的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.boottimeapplication" android:versionCode="1" android:versionName="1.0" > <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="21" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.boottimeapplication.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> <service android:name="com.example.boottimeapplication.BootTimeService" /> <receiver android:name="com.example.boottimeapplication.RunBootTimeServiceReciver" android:enabled="true" > <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> </intent-filter> </receiver> </application> </manifest>

<强> MainActivity

package com.example.boottimeapplication; import android.app.Activity; import android.os.Bundle; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }

<强> RunBootTimeServiceReciver

package com.example.boottimeapplication; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.util.Log; import android.widget.Toast; public class RunBootTimeServiceReciver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Log.i("reciver", "Before start backgroud service"); Toast.makeText(context, "BackGroundService", Toast.LENGTH_LONG).show(); Intent startServiceIntent = new Intent(context, BootTimeService.class); context.startService(startServiceIntent); } }

<强> BootTimeService

package com.example.boottimeapplication; import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.util.Log; import android.widget.Toast; public class BootTimeService extends Service { private static final String TAG = BootTimeService.class.getSimpleName(); @Override public IBinder onBind(Intent intent) { throw new UnsupportedOperationException("Not yet implemented"); } @Override public void onStart(Intent intent, int startId) { Log.i(TAG, "onStart"); Toast.makeText(getApplicationContext(), "onStart", Toast.LENGTH_LONG).show(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.i(TAG, "onStartCommand"); Toast.makeText(getApplicationContext(), "onStartCommand", Toast.LENGTH_LONG).show(); return START_STICKY; } @Override public void onCreate() { super.onCreate(); Log.i(TAG, "Service creating"); Toast.makeText(getApplicationContext(), "Service is created", Toast.LENGTH_LONG).show(); } @Override public void onDestroy() { super.onDestroy(); Log.i(TAG, "Service destroying"); } }

Answer 2

假设您在API级别＆gt; = 13的设备上运行，您应该在CommonsWare之后阅读以下博文：http://commonsware.com/blog/2011/07/05/boot-completed-regression.html

基本上，它表示只有在用户启动应用程序至少一次后才会收到任何广播。

我无法在Android应用中运行启动时间服务

2 个答案: