Service实时向Activity传递数据案例

演示一个案例，需求如下：在Service组件中创建一个线程，该线程用来生产数值，每隔1秒数值自动加1，然后把更新后的数值在界面上实时显示。

步骤如下：1、新建一个android项目工程，取名为demo。2、新建一个Service类，用来实时生产数值，供界面实时显示。

package com.ljq.activity;   import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.util.Log;   public class CountService extends Service {  private int count = 0;  private boolean threadDisable=false;    @Override  public void onCreate() {   super.onCreate();       new Thread(new Runnable() {    @Override    public void run() {     while (!threadDisable) {      try {       Thread.sleep(1000);      } catch (InterruptedException e) {       e.printStackTrace();      }      count++;      Log.v("CountService", "Count is " + count);             //发送广播      Intent intent=new Intent();      intent.putExtra("count", count);      intent.setAction("com.ljq.activity.CountService");      sendBroadcast(intent);     }    }   }).start();    }    @Override  public IBinder onBind(Intent intent) {   return null;  }    @Override  public void onDestroy() {   super.onDestroy();   count=0;   threadDisable = true;   Log.v("CountService", "on destroy");  }     }

3、新建一个Activity类，显示数据。

package com.ljq.activity;   import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText;   public class MainActivity extends Activity {  private EditText editText=null;  private MyReceiver receiver=null;        @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);                   editText=(EditText)findViewById(R.id.editText);                   //启动服务         startService(new Intent(MainActivity.this, CountService.class));             //注册广播接收器   receiver=new MyReceiver();   IntentFilter filter=new IntentFilter();   filter.addAction("com.ljq.activity.CountService");   MainActivity.this.registerReceiver(receiver,filter);     }           @Override  protected void onDestroy() {      //结束服务         stopService(new Intent(MainActivity.this, CountService.class));   super.onDestroy();   }           /**      * 获取广播数据      *      * @author jiqinlin      *      */     public class MyReceiver extends BroadcastReceiver {      @Override      public void onReceive(Context context, Intent intent) {       Bundle bundle=intent.getExtras();       int count=bundle.getInt("count");       editText.setText(count+"");         }     }                  }

4、main.xml布局文件

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:layout_width="fill_parent"  android:layout_height="fill_parent">     <EditText android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:cursorVisible="false"         android:editable="false"         android:id="@+id/editText"/>   </LinearLayout>

5、清单文件

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"       package="com.ljq.activity"       android:versionCode="1"       android:versionName="1.0">     <application android:icon="@drawable/icon" android:label="@string/app_name">         <activity android:name=".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 =".CountService" />       </application>     <uses-sdk android:minSdkVersion="7" />   </manifest>

效果如下：

 

转自：http://www.cnblogs.com/linjiqin/p/3147764.html

 

转载于:https://www.cnblogs.com/jasonkent27/p/4375379.html

相关资源：Android中Service实时向Activity传递数据实例分析