Activity绑定本地Service

服务客户端(Activity)：

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
private final String TAG = "ActivityBindLocalService";
private LocalService mLocalService;
private boolean mIsBound;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bindLocalService = (Button) findViewById(R.id.bind_local_service);
bindLocalService.setOnClickListener(bindClickListener);
Button unBindLocalService = (Button) findViewById(R.id.unBind_local_service);
unBindLocalService.setOnClickListener(unBindOnClickListener);
}
private final OnClickListener bindClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
doBindService();
}
};
private final OnClickListener unBindOnClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
doUnBindService();
}
};
private void doBindService(){
//将此Activity和LocalService绑定，然后会执行ServiceConnection里面的onServiceConnected
Log.i(TAG, "MainActivity ----> bindService");
bindService(new Intent(MainActivity.this, LocalService.class),
mServiceConnection, Context.BIND_AUTO_CREATE);
mIsBound = true;
}
private void doUnBindService(){
if (mIsBound) {
//将此Activity和LocalService解除绑定，会直接执行LocalService的onDestory方法,将此Service销毁
unbindService(mServiceConnection);
mIsBound = false;
}
}
private final ServiceConnection mServiceConnection = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {
mLocalService = null;
Toast.makeText(MainActivity.this,
"Disconnected from local service, 只有在异常的情况才会调用onServiceDisonnected方法",
Toast.LENGTH_SHORT).show();
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
//获得LocalService实例，注意：此时仅仅是将Activity和LocalService绑定起来了，但并没有启动Service
//如果要启动LocalService，
//只需要执行mLocalService.startService(new Intent(MainActivity.this, LocalService.class));
Log.i(TAG, "MainActivity ----> onServiceConnected");
mLocalService = ((LocalService.LocalBinder)service).getLocalService();
Toast.makeText(MainActivity.this, "Connected to local service", Toast.LENGTH_SHORT).show();
}
};
/**
* 此方法用于初始化菜单，其中menu参数就是即将要显示的Menu实例。
* 返回true则显示该menu,false 则不显示;
* (只会在第一次初始化菜单时调用)
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

本地服务类(Service)：

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
public class LocalService extends Service {
private final String TAG = "ActivityBindLocalService";
private final IBinder mBinder = new LocalBinder();
/**
* 返回LocalBinder对象
*/
@Override
public IBinder onBind(Intent intent) {
Log.i(TAG, "LocalService ----> LocalService onBind");
return mBinder;
}
/**
* 创建一个内部类用来返回LocalService实例
* @author Simon Xu
*
* 2013-4-10下午2:34:33
*/
public class LocalBinder extends Binder{
LocalService getLocalService(){
Log.i(TAG, "localService ----> return LocalService");
return LocalService.this;
}
}
@Override
public void onCreate() {
Log.i(TAG, "LocalService----> LocalService onCreate");
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i(TAG, "LocalService----> LocalService onStartCommand");
return START_STICKY;
}
@Override
public void onDestroy() {
Log.i(TAG, "LocalService----> LocalService onDestroy");
super.onDestroy();
}
}

（此图来源于<<Android框架揭秘>>一书）

转载于:https://blog.51cto.com/sinmo/1175616