主类:
package com.example.service;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private Button button1, button2;
ServiceConnection connection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
MyService.MyBinder myBinder = (MyService.MyBinder) service;
String s = myBinder.fangfa();
Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();
}
@Override
public void onServiceDisconnected(ComponentName name) {
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 = findViewById(R.id.button1);
button2 = findViewById(R.id.button2);
final Intent intent = new Intent(MainActivity.this, MyService.class);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//启动服务
// startService(intent);
//传信息
//第一个参数intent对象 第二个参数:ServiceConnection接口对象 第三个参数:是否主动创建服务的标记:BIND_AUTO_CREATE
bindService(intent, connection, BIND_AUTO_CREATE);
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// stopService(intent);
unbindService(connection);
}
});
}
}
MyService:
package com.example.service;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.support.annotation.NonNull;
import android.util.Log;
public class MyService extends Service {
public MyService() {
}
//创建
@Override
public void onCreate() {
super.onCreate();
Log.i("hh", "onCreate");
}
//需求
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("hh", "onStartCommand");
return super.onStartCommand(intent, flags, startId);
}
//停止服务
@Override
public void onDestroy() {
super.onDestroy();
Log.i("hh", "onDestroy");
}
//返回值
@Override
public IBinder onBind(Intent intent) {
return new MyBinder();
}
//服务器返回信息
static class MyBinder extends Binder {
public String fangfa() {
//这里可以进行任何操作,然后再返回值
return "sfd";
}
}
}
主布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Button
android:id="@+id/button1"
android:text="启动服务"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/button2"
android:text="停止服务"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.service">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".MyService"
android:enabled="true"
android:exported="true">
</service>
</application>
</manifest>