目 录
Service生命周期解析（相关方法详解、启动方式的不同、绑定）
2020-04-21-星期二【第10周】
菜鸟教程---4.2.1 Service初涉【https://www.runoob.com/w3cnote/android-tutorial-intro.html】
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老师讲了很多这篇文章。
Service与Thread的区别
Service的生命周期
Service生命周期解析（相关方法详解、启动方式的不同、绑定）
course1001
运行截图
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cn.wangzg.course1001">
<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">
<service
android:name=".MyService"
android:enabled="true"
android:exported="true"></service>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>MainActivity.java
package cn.wangzg.course1001;
import androidx.appcompat.app.AppCompatActivity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private Intent intent;
private MyService.MyBinder binder;
//匿名内部类
private ServiceConnection conn = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
Log.d(TAG, "onServiceConnected: ");
binder = (MyService.MyBinder) service;
}
@Override
public void onServiceDisconnected(ComponentName name) {
Log.d(TAG, "onServiceDisconnected: ");
binder = null;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
intent = new Intent(this, MyService.class);
}
//Ctrl+alt+f
public void btnStart(View view) {
startService(intent);
}
public void btnStop(View view) {
//Intent intent=new Intent(this,MyService.class);
stopService(intent);
}
public void btnBind(View view) {
bindService(intent, conn, BIND_AUTO_CREATE);
binder.getAaa();
}
public void btnUnBind(View view) {
unbindService(conn);
}
}Service.java
package cn.wangzg.course1001;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
public class MyService extends Service {
private static final String TAG = "MyService";
private String aaa;
public MyService() {
aaa = "hello Service！";
}
public class MyBinder extends Binder {
public String getAaa() {
return aaa;
}
}
//返回的是一个Binder对象，作用：用来操作Service
@Override
public IBinder onBind(Intent intent) {
Log.d(TAG, "onBind: ");
return new MyBinder();
}
@Override
public boolean onUnbind(Intent intent) {
Log.d(TAG, "onUnbind: ");
return super.onUnbind(intent);
}
@Override
public void onCreate() {
super.onCreate();
Log.d(TAG, "onCreate: ");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG, "onStartCommand: ");
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onDestroy() {
Log.d(TAG, "onDestroy: ");
super.onDestroy();
}
}activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:onClick="btnStart"
android:text="startService"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:onClick="btnStop"
android:text="StopService"
app:layout_constraintBaseline_toBaselineOf="@+id/button"
app:layout_constraintStart_toEndOf="@+id/button" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:onClick="btnBind"
android:text="bind"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:onClick="btnUnBind"
android:text="unbind"
app:layout_constraintBaseline_toBaselineOf="@+id/button3"
app:layout_constraintStart_toEndOf="@+id/button3" />
</androidx.constraintlayout.widget.ConstraintLayout>