本文实例讲述了Android中Service实时向Activity传递数据的方法。分享给大家供大家参考。具体如下：
这里演示一个案例，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：
希望本文所述对大家的Android程序设计有所帮助。
