android之service

MainActivity.Java

package com.example.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener{

    private static final String TAG = "ServicesDemo";
      Button buttonStart, buttonStop;

      @Override
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        buttonStart = (Button) findViewById(R.id.buttonStart);
        buttonStop = (Button) findViewById(R.id.buttonStop);

        buttonStart.setOnClickListener(this);
        buttonStop.setOnClickListener(this);
      }
      
      public void onClick(View src) {
        switch (src.getId()) {
        case R.id.buttonStart:
          Log.d(TAG, "onClick: starting srvice");
          startService(new Intent(this, MyService.class));
          break;
        case R.id.buttonStop:
          Log.d(TAG, "onClick: stopping srvice");
          stopService(new Intent(this, MyService.class));
          break;
        }
      }
    }

MyService.Java

package com.example.test;

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

public class MyService extends Service {
        private static final String TAG = "MyService";
        MediaPlayer player;
       
        @Override
        public IBinder onBind(Intent intent) {
                return null;
        }
       
        @Override
        public void onCreate() {
                Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
                Log.d(TAG, "onCreate");
        }

        @Override
        public void onDestroy() {
                Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
                Log.d(TAG, "onDestroy");
        }
       
        @Override
        public void onStart(Intent intent, int startid) {
                Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
                Log.d(TAG, "onStart");
        }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/buttonStart"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/buttonStop"
        android:layout_alignParentTop="true"
        android:layout_marginTop="74dp"
        android:text="开始" />

    <Button
        android:id="@+id/buttonStop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="122dp"
        android:text="结束" />

</RelativeLayout>

AndroidManifest.xml，添加

<service android:enabled="true" android:name=".MyService" />