Android 自启动 后台运行 发送短信

android本地后台服务示例

在android编写Service入门中介绍了android的两种后台服务，本地和远程的。这里用本地服务做了一个模拟定时后台发短信的技术原型。

启动该示例应用的样子：





选择启动：



启动后，可看到ddms logcat日志：



这是操作：启动、停止和退出应用，显示的调试日志信息。模拟后台服务每5秒钟发送一次短信信息。

主要代码，后台服务SmsService：

    package com.easymorse;

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

    public class SmsService extends Service {

        private boolean started;

        private boolean threadDisable;

        private ServiceBinder serviceBinder = new ServiceBinder();

        public class ServiceBinder extends Binder implements ISmsService {

            @Override
            public boolean isStarted() {
                return started;
            }

            @Override
            public void start() {
                started=true;
                Log.d(“sms.service”, “sms service started.”);
            }

            @Override
            public void stop() {
                started=false;
                Log.d(“sms.service”, “sms service stopped.”);
            }
        }

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

        @Override
        public void onCreate() {
            super.onCreate();

            Thread thread = new Thread() {
                @Override
                public void run() {
                    while (!threadDisable) {
                        try {
                            if (started) {
                                Log.d(“sms.service”, “send a sms message.”);
                            }
                            Thread.sleep(1000 * 5);
                        } catch (InterruptedException e) {
                        }
                    }
                }
            };

            thread.start();

            Log.d(“sms.service”, “sms service created.”);
        }

        @Override
        public void onDestroy() {
            super.onDestroy();
            threadDisable = true;
            Log.d(“sms.service”, “sms service shutdown.”);
        }
    }

    

前台的Actvity代码，SmsServiceOptions：

    package com.easymorse;

    import android.app.TabActivity;
    import android.content.ComponentName;
    import android.content.Intent;
    import android.content.ServiceConnection;
    import android.os.Bundle;
    import android.os.IBinder;
    import android.util.Log;
    import android.widget.RadioGroup;
    import android.widget.TabHost;
    import android.widget.RadioGroup.OnCheckedChangeListener;

    public class SmsServiceOptions extends TabActivity {

        private RadioGroup radioGroup;

        private ISmsService smsService;

        private ServiceConnection serviceConnection = new ServiceConnection() {

            @Override
            public void onServiceConnected(ComponentName name, IBinder service) {
                smsService = (ISmsService) service;

                if (smsService.isStarted()) {
                    radioGroup.check(R.id.radioButtonStart);
                } else {
                    radioGroup.check(R.id.radioButtonStop);
                }

                radioGroup
                        .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                            @Override
                            public void onCheckedChanged(RadioGroup group,
                                    int checkedId) {
                                if (checkedId == R.id.radioButtonStart) {
                                    Log.d(“sms.service”, “starting service…”);
                                    smsService.start();
                                } else {
                                    Log.d(“sms.service”, “stopping service…”);
                                    smsService.stop();
                                }
                            }
                        });
            }

            @Override
            public void onServiceDisconnected(ComponentName name) {
                smsService = null;
            }
        };

        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);

            this.setTitle(“短信服务器”);
            this.bindService(new Intent(“com.easymorse.SmsService”),
                    this.serviceConnection, BIND_AUTO_CREATE);

            TabHost tabHost = this.getTabHost();
            tabHost.setup();

            TabHost.TabSpec spec = tabHost.newTabSpec(“服务选项”);
            spec.setContent(R.id.Option01);
            spec.setIndicator(“服务选项”);
            tabHost.addTab(spec);

            spec = tabHost.newTabSpec(“服务状态”);
            spec.setContent(R.id.Option02);
            spec.setIndicator(“服务状态”);
            tabHost.addTab(spec);

            radioGroup = (RadioGroup) this.findViewById(R.id.radioGroup01);
        }

        @Override
        protected void onDestroy() {
            super.onDestroy();
            this.unbindService(serviceConnection);
        }
    }

  

   

另外，不要忘记在配置文件中增加对service的声明，见AndroidManafest.xml：

    <?xml version=”1.0″ encoding=”utf-8″?>
    <manifest xmlns:android=”http://schemas.android.com/apk/res/android”
        package=”com.easymorse” android:versionCode=”1″ android:versionName=”1.0″>
        <application android:icon=”@drawable/icon” android:label=”@string/app_name”>
            <activity android:name=”.SmsServiceOptions” 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=”.SmsService”>
                <intent-filter>
                    <action android:name=”com.easymorse.SmsService”></action>
                </intent-filter>
            </service>
        </application>
        <uses-sdk android:minSdkVersion=”3″ />
    </manifest> 

评论

2 楼 ming_fanglin 2011-09-22  

stopService 时

1 楼 cdn_mn_mm 2011-09-21  

什么时候调用service的onDestroy方法呢