绑定服务进行数据通信(over)

本文介绍了一个Android应用程序中服务组件与Activity之间的通信实例。通过使用Binder机制和服务连接接口,实现了Activity与服务之间的绑定、数据同步及回调通知等功能。
package com.example.yabushan.servicetest;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity implements View.OnClickListener, ServiceConnection {

    private EditText tx;
    private MyService.Binder binder=null;
    private TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tx= (EditText) findViewById(R.id.editText);
        textView= (TextView) findViewById(R.id.textView);
        findViewById(R.id.bindService).setOnClickListener(this);
        findViewById(R.id.unbindService).setOnClickListener(this);
        findViewById(R.id.syncData).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.bindService:
                bindService(new Intent(this,MyService.class),this, Context.BIND_AUTO_CREATE);
                break;
            case R.id.unbindService:
                unbindService(this);
                break;
            case R.id.syncData:
                if(binder!=null)
                    System.out.println("同步数据服务");
                    binder.setData(tx.getText().toString());

                break;
        }

    }

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        System.out.println("绑定服务");
        binder = (MyService.Binder) service;
        binder.getService().setCallback(new MyService.CallBack() {
            @Override
            public void onDataChange(String data) {
                Message msg=new Message();
                Bundle bundle=new Bundle();
                bundle.putString("data",data);
                msg.setData(bundle);
                handler.sendMessage(msg);

            }
        });


    }

    @Override
    public void onServiceDisconnected(ComponentName name) {

    }

    private Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);

            textView.setText(msg.getData().getString("data"));
        }
    };
}

  

package com.example.yabushan.servicetest;

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

public class MyService extends Service {
    private String data="默认值";
    private boolean running=true;

    public MyService() {

    }
  //接口成员 private CallBack callback=null;   //get方法 public CallBack getCallback() { return callback; }   //set方法 public void setCallback(CallBack callback) { this.callback = callback; } @Override public IBinder onBind(Intent intent) { return new Binder(); }
//用于service与activity之间沟通的桥梁 public class Binder extends android.os.Binder{ public void setData(String data){ MyService.this.data=data; }
public MyService getService(){ return MyService.this; } } @Override public void onCreate() { super.onCreate(); new Thread(){ @Override public void run() { int i=0; while(running) { super.run(); i++; String str=i + ":" + data; System.out.println(str); if(callback!=null){ callback.onDataChange(str); } try { sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); } @Override public void onDestroy() { super.onDestroy(); System.out.println("取消绑定"); running=false; }
//创建一个接口用来回调 public static interface CallBack{ void onDataChange(String data); } }

  

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:orientation="vertical"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textView"/>
    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="默认值"
        android:id="@+id/editText" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="绑定服务"
        android:id="@+id/bindService" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="取消绑定服务"
        android:id="@+id/unbindService" />

    <Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="同步数据"
        android:id="@+id/syncData" />
</LinearLayout>

-22 05:26:13.729 3767-3767/? I/System.out: 绑定服务
11-22 05:26:13.732 3767-3798/? I/System.out: 1:默认值
11-22 05:26:15.746 3767-3798/? I/System.out: 2:默认值
11-22 05:26:17.756 3767-3798/? I/System.out: 3:默认值
11-22 05:26:19.767 3767-3798/? I/System.out: 4:默认值
11-22 05:26:20.213 1554-1554/? I/LatinIME: Starting input. Cursor position = 0,0
11-22 05:26:20.277 3767-3782/? W/EGL_emulation: eglSurfaceAttrib not implemented
11-22 05:26:20.277 3767-3782/? W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xad91ad20, error=EGL_SUCCESS
11-22 05:26:20.322 1554-3574/? W/EGL_emulation: eglSurfaceAttrib not implemented
11-22 05:26:20.323 1554-3574/? W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xaf8fe2a0, error=EGL_SUCCESS
11-22 05:26:21.776 3767-3798/? I/System.out: 5:默认值
11-22 05:26:23.786 3767-3798/? I/System.out: 6:默认值
11-22 05:26:24.229 3767-3782/? E/Surface: getSlotFromBufferLocked: unknown buffer: 0xab9444c0
11-22 05:26:25.151 1554-1696/? I/LatinIME:LogUtils: Dictionary info: dictionary = spellcheck_contacts.en_US ; version = 1448169985 ; date = ?
11-22 05:26:25.152 1304-1316/? I/AccountManagerService: getTypesVisibleToCaller: isPermitted? true
11-22 05:26:25.163 1554-1696/? I/LatinIME:LogUtils: Dictionary info: dictionary = spellcheck_userunigram.en_US ; version = 1448169985 ; date = ?
11-22 05:26:25.173 1554-1696/? I/LatinIME:LogUtils: Dictionary info: dictionary = main:en ; version = 54 ; date = 1414726273
11-22 05:26:25.796 3767-3798/? I/System.out: 7:默认值
11-22 05:26:26.642 3767-3767/? I/System.out: 同步数据服务
11-22 05:26:27.806 3767-3798/? I/System.out: 8:默认值ww
11-22 05:26:29.815 3767-3798/? I/System.out: 9:默认值ww
11-22 05:26:31.826 3767-3798/? I/System.out: 10:默认值ww
11-22 05:26:33.783 3767-3767/? I/System.out: 同步数据服务
11-22 05:26:33.836 3767-3798/? I/System.out: 11:默认值wwq
11-22 05:26:35.846 3767-3798/? I/System.out: 12:默认值wwq
11-22 05:26:37.857 3767-3798/? I/System.out: 13:默认值wwq
11-22 05:26:39.867 3767-3798/? I/System.out: 14:默认值wwq
11-22 05:26:41.876 3767-3798/? I/System.out: 15:默认值wwq
11-22 05:26:43.886 3767-3798/? I/System.out: 16:默认值wwq
11-22 05:26:45.562 3767-3767/? I/System.out: 取消绑定

转载于:https://www.cnblogs.com/yabushan/p/4985695.html

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