Service实时向Activity传递数据案例-白红宇

Service实时向Activity传递数据案例

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发布时间：2019-06-13

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转自

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

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