Android实现--更改local后，启动一个service-优快云博客

本文介绍了一个简单的Android应用程序设计，该程序能够监听系统语言的变化，并在语言变化时启动一个后台服务来执行特定任务。

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1、定义一个类，继承BroadcastReceiver，用于接收ACTION_LOCALE_CHANGED消息，代码如下：

package android.ipc;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class ipc extends BroadcastReceiver {

    static final String ACTION = "android.intent.action.BOOT_COMPLETED";

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().compareTo(Intent.ACTION_LOCALE_CHANGED) == 0)
        {
            //start activity
            Intent smart_service = new Intent(Intent.ACTION_RUN);
            smart_service.setClass(context, DateTimeService.class);
            //smart_service.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startService(smart_service);
        }
    }
}

2、定义一个service，继承Service，用于完成后台任务，代码如下：

package android.ipc;

import android.content.Intent;
import android.app.Service;
import android.util.Log;
import android.widget.Toast;
import android.os.IBinder;

public class DateTimeService extends Service {
    private final String TAG = "datetimeservice";

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

    public void onStart(Intent intent, int startId)
    {
        super.onStart(intent, startId);
        Toast.makeText(this, "start onstart", Toast.LENGTH_LONG).show();
        Log.v(TAG, "start onstart");

// your task to add

        stopService(intent);
    }

    public void onCreate()
    {
        super.onCreate();
        Toast.makeText(this, "start oncreate", Toast.LENGTH_LONG).show();
        Log.v(TAG, "start oncreate");
    }

    public void onDestroy()
    {
        super.onDestroy();
        Toast.makeText(this, "start ondestroy", Toast.LENGTH_LONG).show();
        Log.v(TAG, "start ondestroy");
    }
}