/***
*
* 1.用Intent在Service和Activity之间传递数据:从activity传到Service
* 2.用Binder在Service和Activity之间传递数据:MainActivity拿到返回的Binder后,可以调用里面的方法,进行业务需求,如改变 Service里面变量的值
* 3.自定义一个接口,监听Service的数据变化,要使用Handler来传递数据,可以改变activity里面的东西
*
*/
跑起来的时候:
工程概况:
activity_main.xml:
<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:orientation="vertical"
tools:context=".MainActivity">
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tvCjc"/>
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tvOut"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/edtData"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btnStartService"
android:text="启动服务"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btnStopService"
android:text="停止服务"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btnBindService"
android:text="绑定服务"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btnUbBindService"
android:text="解绑服务"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btnSynService"
android:text="同步数据"/>
</LinearLayout>
MainActivity:
package ivo_chuanzhi.connect_service;
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.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
/***
*
* 1.用Intent在Service和Activity之间传递数据:从activity传到Service
* 2.用Binder在Service和Activity之间传递数据:MainActivity拿到返回的Binder后,可以调用里面的方法,进行业务需求,如改变Service里面的值
* 3.自定义一个接口,监听Service的数据变化,要使用Handler来传递数据,可以改变activity里面的东西
*
*/
public class MainActivity extends ActionBarActivity implements View.OnClickListener{
private Intent intent;
private String data = "传递给Service的数据";
EditText edtData;
TextView tvOut,tvCjc;
Button btnStart,btnStop,btnBind,btnUnBind,btnSyn;
private MyService.MyBinder binder = null;
private String Cjc = null;
/****************************onCreate************************/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//操作的是同一个Service,不管是一个Intent实例启动还是两个Intent实例
intent = new Intent(MainActivity.this, MyService.class);
tvCjc = (TextView) findViewById(R.id.tvCjc);
tvOut = (TextView) findViewById(R.id.tvOut);
btnStart = (Button) findViewById(R.id.btnStartService);
btnStop = (Button) findViewById(R.id.btnStopService);
btnBind = (Button) findViewById(R.id.btnBindService);
btnUnBind = (Button) findViewById(R.id.btnUbBindService);
btnSyn = (Button) findViewById(R.id.btnSynService);
edtData = (EditText) findViewById(R.id.edtData);
btnStart.setOnClickListener(this);
btnStop.setOnClickListener(this);
btnBind.setOnClickListener(this);
btnUnBind.setOnClickListener(this);
btnSyn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btnStartService:
//启动服务:1、startServicer 2、绑定服务
data = edtData.getText().toString();
intent.putExtra("data",data);
startService(intent);
break;
case R.id.btnStopService:
//停止服务
stopService(intent);
break;
case R.id.btnBindService:
//绑定服务
bindService(intent, conn, Context.BIND_AUTO_CREATE);
break;
case R.id.btnUbBindService:
//解除绑定
unbindService(conn);
break;
case R.id.btnSynService:
//同步数据
if(binder != null){
//通讯,改变MyService的data值
binder.setData(edtData.getText().toString());
}
break;
}
}
ServiceConnection conn = new ServiceConnection() {
//服务被绑定成功的时候回调
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
System.out.println("绑定成功");
//连接后会返回MyBinder,连接Service通讯
binder = (MyService.MyBinder) service;
Cjc = binder.getCjc();
tvCjc.setText(Cjc);
//通过binder,get到MyService,然后调用srtCallback方法,实现Callback接口,然后就可以实现监听监听Service的数据变化
binder.getMyService().setCallback(new MyService.Callback() {
@Override
public void onDataChange(String data) {
//用Handler来传递,不能直接传递
Message msg = new Message();
Bundle b = new Bundle();
b.putString("data", data);
msg.setData(b);
handler.sendMessage(msg);
}
});
}
//被绑定的服务断线时候会回调
@Override
public void onServiceDisconnected(ComponentName name) {
System.out.println("绑定失败");
}
};
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
tvOut.setText(msg.getData().getString("data"));
}
};
}
MyService:
package ivo_chuanzhi.connect_service;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
public class MyService extends Service {
private boolean ServicerRunning = false;
private String data = "这是默认信息";
public MyService() {
}
//Service都必须实现的方法
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
//没绑定的话
//throw new UnsupportedOperationException("Not yet implemented");
//如果实现了绑定了,需要实现onBind接口,返回一个Binder对象,通过Binder可以实现与绑定的activity通讯
// return new MyBinder();//可以重写Binder,方便业务与activity通讯,向activity传各种业务数据,重写或自己写各种方法,满足业务的需要
MyBinder binder = new MyBinder();
return binder;
}
public class MyBinder extends Binder{
private String cjc = "努力提高自己的技术";
public String getCjc(){
return cjc;
}
public void setData(String data){
MyService.this.data = data;
}
public MyService getMyService(){
return MyService.this;
}
}
//在activity里面启动了startService(new Intent(MainActivity.this, MyService.class));
//的方法都会回调这个函数,可重复执行
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
System.out.println("===onStartCommand===");
data = intent.getStringExtra("data");
return super.onStartCommand(intent, flags, startId);
}
//创建服务后第一个回调该函数,只执行一次
@Override
public void onCreate() {
super.onCreate();
System.out.println("我的服务被创建了");
ServicerRunning = true;
new Thread() {
@Override
public void run() {
super.run();
int i = 0;
while (ServicerRunning) {
i++;
String str = i + ":" + data;
System.out.println(str);
if(callback != null){
callback.onDataChange(str);//在循环中不停的被调用,MainActivity那边会不停地回调
}
try {
sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}.start();
}
//stopService被执行后会回调
@Override
public void onDestroy() {
//stopService和UnBind都会关掉服务
System.out.println("我的服务被关掉了");
ServicerRunning = false;
}
//通知外界的接口
public static interface Callback{
//为实现的方法
void onDataChange(String data);
}
private Callback callback = null;
public void setCallback(Callback callback){
this.callback = callback;
}
public Callback getCallback(){
return callback;
}
}