Android -- 启动Service并传递数据

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本文主要记录Activity传递数据到Service。

1、效果图


2、通过以上效果图，可以看出activity页面的数值改变，相应后台service输出的数值也跟着改变。
3、核心代码如下，看代码中的38行，使用Intent作为载体，装载activity页面上的数据。

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<code class="hljs" java="">package com.example.connectservice;   import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.EditText;   public class MainActivity extends Activity implements OnClickListener {       private EditText edit;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);           findViewById(R.id.startService).setOnClickListener(this);         findViewById(R.id.stopService).setOnClickListener(this);           edit = (EditText) findViewById(R.id.editText1);     }       @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 onClick(View v) {         switch (v.getId()) {         case R.id.startService:             Intent i = new Intent(this, MyService.class);             i.putExtra(data, edit.getText().toString());             startService(i);             break;         case R.id.stopService:             stopService(new Intent(this, MyService.class));             break;         }     }   } </code>

4、Service代码如下，详见代码的21行，我们在onStartCommand方法中通过intent参数获取activity传过来的值。

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<code class="hljs" java="">package com.example.connectservice;   import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.widget.EditText;   public class MyService extends Service {       String data;     boolean running = false;       @Override     public IBinder onBind(Intent intent) {         // TODO Auto-generated method stub         return null;     }       @Override     public int onStartCommand(Intent intent, int flags, int startId) {         data = intent.getStringExtra(data);         return super.onStartCommand(intent, flags, startId);     }       @Override     public void onCreate() {         super.onCreate();         running = true;           new Thread() {             public void run() {                 while (running) {                     System.out.println(Service中获取到的数据： + data);                     try {                         Thread.sleep(1000);                     } catch (InterruptedException e) {                         // TODO Auto-generated catch block                         e.printStackTrace();                     }                 }             };         }.start();     }       @Override     public void onDestroy() {         super.onDestroy();         running = false;     }   } </code>

 

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<code class="hljs" xml=""><manifest android:versioncode="1" android:versionname="1.0" package="com.example.connectservice" xmlns:android="http://schemas.android.com/apk/res/android"><uses-sdk android:minsdkversion="8" android:targetsdkversion="21">                             <intent-filter>                                     <category android:name="android.intent.category.LAUNCHER">             </category></action></intent-filter>         </activity>           <service android:enabled="true" android:exported="true" android:name=".MyService">         </service>     </application>   </uses-sdk></manifest> </code>

Android -- 启动Service并传递数据

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原文地址：http://www.cnblogs.com/cityking/p/a017.html