Disclaimer: The usage of each method is in the comments of the code: you can watch it yourself
Service code:
public class MyService extends Service {
MyBinder myBinder = new MyBinder();
@Nullable
@Override
public IBinder onBind(Intent intent) {
//放回的Ibinder是一个接口，放回Binder对象（继承了IBinder）也可以
//返回的Binder会传入到ServiceConnection的重写方法onServiceConnected中
Log.d("MyService" , "onBind: ");
return myBinder;
}
@Override
public void onRebind(Intent intent) {
super.onRebind(intent);
Log.d("MyService" , "onRebind: ");
//当onUnbind的返回值为true时，与该服务绑定的活动离开视线后再重新回到视线后，重新bindService时会调用
}
@Override
public boolean onUnbind(Intent intent) {
Log.d("MyService" , "onUnbind: ");
return true;
}
@Override
public void onCreate() {
//在onBind或onStartCommand前调用
super.onCreate();
Log.d("MyService" , "onCreat: ");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("MyService" , "onStatrCommand: ");
return super.onStartCommand(intent, flags, startId);
//startService时调用
}
@Override
public void onDestroy() {
super.onDestroy();
Log.d("MyService" , "onDestory: ");
//stopService时调用
}
}
layout：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:orientation="vertical">
<Button
android:onClick="sendService"
android:id="@+id/bt1"
android:text="sendService"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:onClick="stopService"
android:id="@+id/bt2"
android:text="stopService"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:onClick="bindService"
android:id="@+id/bt3"
android:text="bindService"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:onClick="unbindService"
android:id="@+id/bt4"
android:text="unbindService"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:onClick="sendIntentService"
android:id="@+id/bt5"
android:text="sendIntentService"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
IntentService: Solve time-consuming work – run in a child thread, and ondestory() will be automatically called back when it ends
//为了实现多线程操作一些耗时的时候忘记stopService时的IntentService
//该类的功能时实现一些耗时工作后并自动关闭服务
public class MyIntentService extends IntentService {
//一定要有无参构造函数，且要super一下父类的带参构造函数
public MyIntentService() {
super("MyIntentService");
}
@Override
protected void onHandleIntent(@Nullable Intent intent) {
//此方法在子线程中运行，可以处理一下耗时的工作，具体逻辑自己写
Log.d("MyIntentService", "onHandleIntent: ");
}
//onHandleIntent执行结束后会自动调用onDestory()
@Override
public void onDestroy() {
super.onDestroy();
Log.d("MyIntentService", "onDestroy: ");
}
}
Binder：
public class MyBinder extends Binder {
//在绑定的时候充当onBind的返回类型
public void startDownload(){
Log.d("MyService", "startDownload: ");
}
public void getProgress(){
Log.d("MyService", "getProgress: ");
}
}
Main function:
public class MainActivity extends AppCompatActivity {
MyBinder myBinder;
Intent intent;
Intent intentService;
ServiceConnection serviceConnection = new ServiceConnection(){
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
Log.d("MyService", "onServiceConnected: ");
myBinder = (MyBinder) service;
myBinder.getProgress();
myBinder.startDownload();
}
@Override
public void onServiceDisconnected(ComponentName name) {
Log.d("MyService", "onServiceDisconnected: ");
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
intent = new Intent(this, MyService.class);
intentService = new Intent(this,MyIntentService.class);
}
public void sendService(View view) {
startService(intent);
}
public void stopService(View view) {
stopService(intent);
}
public void bindService(View view) {
bindService(intent,serviceConnection,0);
}
public void unbindService(View view) {
unbindService(serviceConnection);
}
public void sendIntentService(View view) {
startService(intentService);
}
}