Android实例三:学习Service

第一步.MainActivity.java

 

 

package com.chaowen;

import android.app.Activity;
import android.app.Service;
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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
   private Button startButton,stopButton,bindButton,unbindButton;
   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        startButton = (Button)findViewById(R.id.startButton);
        stopButton = (Button)findViewById(R.id.stopButton);
        bindButton = (Button)findViewById(R.id.bindButton);
        unbindButton = (Button)findViewById(R.id.unbindButton);
        
        //添加监听器
        startButton.setOnClickListener(startListener);
        stopButton.setOnClickListener(stopListener);
        bindButton.setOnClickListener(bindListener);
        unbindButton.setOnClickListener(unbindListener);
        
    }
    
    
    
    //启动Service监听器
    private OnClickListener startListener = new OnClickListener() {
		
		@Override
		public void onClick(View v) {
		//创建Intent
			Intent intent = new Intent();
			//设置Action属性
			intent.setAction("com.chaowen.action.MY_SERVICE");
			//启动该Service
			startService(intent);
		}
	};
	
	
	//停止Service监听器
	private OnClickListener stopListener = new OnClickListener() {
		
		@Override
		public void onClick(View v) {
		   Intent intent = new Intent();
		   intent.setAction("com.chaowen.action.MY_SERVICE");
		   stopService(intent);
			
		}
	};
	
	
	
	//连接对象
	private ServiceConnection connection =new ServiceConnection() {
		//断开时调用
		@Override
		public void onServiceDisconnected(ComponentName name) {
			//输出日志
			Log.i("Service", "断开连接");
			//通过Toast显示信息
			Toast.makeText(MainActivity.this, "断开连接", Toast.LENGTH_LONG).show();
		}
		//连接时调用
		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			//输出日志
			Log.i("Service", "连接成功");
			//通过Toast显示信息
			Toast.makeText(MainActivity.this, "连接成功", Toast.LENGTH_LONG).show();
		}
	};
	
	
	//绑定Service监听器
	private OnClickListener bindListener = new OnClickListener() {
		
		@Override
		public void onClick(View v) {
			Intent intent = new Intent();
			intent.setAction("com.chaowen.action.MY_SERVICE");
			bindService(intent, connection, Service.BIND_AUTO_CREATE);
			
		}
	};
	
	//解除绑定Service监听器
	private OnClickListener unbindListener = new OnClickListener() {
		
		@Override
		public void onClick(View v) {
			Intent intent = new Intent();
			intent.setAction("com.chaowen.action.MY_SERVICE");
			unbindService(connection);
		}
	};
}

   第二步.MyService.java

   package com.chaowen;

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

public class MyService extends Service {

	@Override
	public IBinder onBind(Intent intent) {
	    Log.i("SERVICE", "onBind");
	    Toast.makeText(MyService.this, "onBind...", Toast.LENGTH_LONG).show();
		return null;
	}
   
	
	
	@Override
	public void onCreate() {
		 Log.i("SERVICE", "onCreate");
		 Toast.makeText(MyService.this, "onCreate...", Toast.LENGTH_LONG).show();
	}
	
	
	@Override
	public void onStart(Intent intent, int startId) {
		 Log.i("SERVICE", "onStart");
		 Toast.makeText(MyService.this, "onStart...", Toast.LENGTH_LONG).show();
	}
	
	@Override
	public void onDestroy() {
		 Log.i("SERVICE", "onDestroy");
		 Toast.makeText(MyService.this, "onDestroy...", Toast.LENGTH_LONG).show();
	}
}

  第三步.main.xml

  <?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"
    >
<Button
  android:text="启动Service"
  android:id="@+id/startButton"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />
  
  
  <Button
  android:text="停止Service"
  android:id="@+id/stopButton"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />
  
  <Button
  android:text="绑定Service"
  android:id="@+id/bindButton"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />
  
  <Button
  android:text="解除绑定"
  android:id="@+id/unbindButton"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />
  
</LinearLayout>

   第四步.AndroidManifest.xml

    <?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.chaowen"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="4" />

    <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="MyService">
           <intent-filter>
             <action android:name="com.chaowen.action.MY_SERVICE" />
             </intent-filter>
        
        </service>
    </application>
</manifest>