android 使用Binder通信

最新推荐文章于 2025-04-28 15:34:53 发布

usetsai

最新推荐文章于 2025-04-28 15:34:53 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/u011905115/article/details/26282455

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本文提供了一个简单的Android应用示例，展示了如何通过Activity与Service进行通信。通过ServiceConnection实现服务的绑定与解绑，以及在Activity中调用Service的方法并获取响应。

遇到下雨，写个简单例子，用于Activity与Service通信，之前也有一篇Binder的：点击。

例子非常简单：

MainActivity.java

package com.juno.testbind;

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.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

public class MainActivity extends Activity {

	public final static String EXTRA_KEY_DATA = "key_data";
	private TestService mTestService;
	
	private ServiceConnection mConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName className, IBinder service) {
        	mTestService = ((TestService.TestBinder)service).getService();
        }

        public void onServiceDisconnected(ComponentName className) {
            if(mTestService != null){
            	mTestService = null;
            }
        }
    };
    
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		bindService();
		initView();
	}

	private void initView() {
		findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				if (mTestService != null) {
					mTestService.doSomeThing();
					((TextView) findViewById(R.id.textView1)).setText(mTestService.getData());
				}
			}
		});
	}

	private void bindService() {
		Intent serviceIntent = new Intent(this, TestService.class);
        serviceIntent.putExtra(EXTRA_KEY_DATA, "data");
        bindService(serviceIntent, mConnection, Context.BIND_AUTO_CREATE);
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		unbindService(mConnection);
	}

	
}

TestService.java

package com.juno.testbind;

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

public class TestService extends Service {

	private IBinder mBind = new TestBinder();
	
	public class TestBinder extends Binder {
        TestService getService() {
            return TestService.this;
        }
    }
	
	@Override
	public IBinder onBind(Intent intent) {
		if (intent != null) {
			//get Extra Data
			String data = intent.getStringExtra(MainActivity.EXTRA_KEY_DATA);
			Toast.makeText(this, data, Toast.LENGTH_SHORT).show();
        }
		return mBind;
	}

	@Override
	public boolean onUnbind(Intent intent) {
		return super.onUnbind(intent);
	}

	public void doSomeThing() {
		Toast.makeText(this, "do some thing and set text to TextView", Toast.LENGTH_LONG).show();
	}
	
	public String getData() {
		return "test";
	}
}

是Service得

<service android:name="com.juno.testbind.TestService" />