Android中和service进行本地通讯

朴灿烈づ我的快乐病毒、 2022-08-06 07:28 162阅读 0赞

查询学号的简单例子

交互图

![Center][]

service代码

package cn.wonder.studertno;
    
    import android.app.Service;
    import android.content.Intent;
    import android.os.Binder;
    import android.os.IBinder;
    
    /**
     * 服务代码
     * @author Administrator
     *
     */
    public class StudentService extends Service{
    	private String[] names = {"张三","李四","王五","赵六","钱七"};
    	
    	private IBinder iBinder = new StudentBinder();
    	
    	public String query(int no) {
    		if(no>0 && no<6) {
    			return names[no-1];
    		}else {
    			return "只能查询学号1-5的学生";
    		}
    	}
    
    	@Override
    	public IBinder onBind(Intent intent) {
    		return iBinder;
    	}
    	
    	//此为私有
    	private class StudentBinder extends Binder implements IStudent{
    		@Override
    		public String queryStudent(int no) {
    			return query(no);
    		}
    	}
    }

Main代码

package cn.wonder.studertno;
    
    import android.content.ComponentName;
    import android.content.Intent;
    import android.content.ServiceConnection;
    import android.os.Bundle;
    import android.os.IBinder;
    import android.support.v7.app.ActionBarActivity;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.TextView;
    
    //客户端
    public class MainActivity extends ActionBarActivity {
    	private EditText studentno;
    	private StudentServiceConnection conn = new StudentServiceConnection();
    	private IStudent iStudent;
    	private TextView resultView;
    
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		
    		resultView = (TextView) findViewById(R.id.export);
    		studentno = (EditText) findViewById(R.id.studentno);
    		Button button = (Button) findViewById(R.id.button);
    		
    		button.setOnClickListener(new View.OnClickListener() {
    			@Override
    			public void onClick(View v) {
    				//得到输入的学号
    				String no = studentno.getText().toString();
    				String name = iStudent.queryStudent(Integer.parseInt(no));
    				resultView.setText(name);
    			}
    		});
    		
    		/*
    		 * 激活服务(显示激活)
    		 */
    		Intent service = new Intent(this, StudentService.class);
    		//BIND_AUTO_CREATE绑定自动创建
    		bindService(service, conn, BIND_AUTO_CREATE);
    		
    	}
    
    	private class StudentServiceConnection implements ServiceConnection {
    		@Override
    		public void onServiceConnected(ComponentName name, IBinder service) {
    			iStudent = (IStudent) service;
    		}
    
    		@Override
    		public void onServiceDisconnected(ComponentName name) {
    			iStudent = null;
    		}
    	}
    	
    	@Override
    	protected void onDestroy() {
    		unbindService(conn);
    		super.onDestroy();
    	}
    }

一个接口

package cn.wonder.studertno;
    
    public interface IStudent {
    	public String queryStudent(int no);
    }

[Center]: /images/20220806/1ee284e6f6de45388bce37851c8e2eae.png