Service通知Activity(Broadcast)

Layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.hzx.service_broadcast.MainActivity">

    <Button
        android:id="@+id/start_service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="start_service"/>

    <Button
        android:id="@+id/bind_service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="bind_service"/>
    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</LinearLayout>

Service

package com.example.hzx.service_broadcast;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;

/**
 * Created by hzx on 2018/11/6.
 */

public class MyService extends Service {

    private final String TAG = "123";
    private MyBinder myBinder = new MyBinder();
    private LocalBroadcastManager localBroadcastManager;
    private int Broadcast_count;
    private MyThread myThread;
    public MyService(){
        this.localBroadcastManager = null;
        this.Broadcast_count = 0;
    }

    class MyBinder extends Binder{
        public void init_Broadcast(LocalBroadcastManager localBroadcastManager){
            Log.d(TAG,"service init_Broadcast");
            set_Broadcast(localBroadcastManager);
        }

        public int start_Thread(){
            if (get_Broadcast() == null){
                return -1;
            }
            Log.d(TAG,"service start_Thread");
            myThread = new MyThread();
            myThread.start();
            return 0;
        }

    }
    private void set_Broadcast(LocalBroadcastManager localBroadcastManager){
        this.localBroadcastManager = localBroadcastManager;
    }
    private LocalBroadcastManager get_Broadcast(){
        return this.localBroadcastManager;
    }
    private int getBroadcast_count(){
        return this.Broadcast_count;
    }
    private void addBroadcast_count(){
        this.Broadcast_count++;
    }
    class MyThread extends Thread{
        public void run(){
            while(true){
                //发送本地广播
                Intent intent = new Intent("com.example.broadcasttest.LOCAL_BROADCAST");
                intent.putExtra("ble",""+getBroadcast_count());
                localBroadcastManager.sendBroadcast(intent);
                addBroadcast_count();
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    Log.d(TAG, "-->InterruptedException:" + getBroadcast_count());
                    e.printStackTrace();
                }
            }
        }
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return myBinder;
    }
    public void onCreate(){
        super.onCreate();
        Log.d(TAG,"service onCreate");
    }
    public int onStartCommand(Intent intent,int flags,int startId){
        Log.d(TAG,"service onStartCommand");
        return super.onStartCommand(intent,flags,startId);
    }
    public void onDestroy(){
        Log.d(TAG,"service onDestroy");
        super.onDestroy();
    }
    
}

MainActivity

package com.example.hzx.service_broadcast;

import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.os.TestLooperManager;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private final String TAG = "123";
    private MyService.MyBinder myBinder;

    private IntentFilter intentFilter;
    private LocalReceiver localReceiver;
    private LocalBroadcastManager localBroadcastManager;

    private TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button startService = (Button)findViewById(R.id.start_service);
        startService.setOnClickListener(MainActivity.this);

        Button bingService = (Button)findViewById(R.id.bind_service);
        bingService.setOnClickListener(MainActivity.this);

        textView = (TextView)findViewById(R.id.text);

        localBroadcastManager = LocalBroadcastManager.getInstance(this);

        intentFilter = new IntentFilter();
        intentFilter.addAction("com.example.broadcasttest.LOCAL_BROADCAST");
        localReceiver = new LocalReceiver();
        //注册本地广播监听器
        localBroadcastManager.registerReceiver(localReceiver,intentFilter);

    }

    private ServiceConnection connection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
            Log.d(TAG,"activity connection");

            myBinder = (MyService.MyBinder)iBinder;
            myBinder.init_Broadcast(localBroadcastManager);
            myBinder.start_Thread();

        }
        @Override
        public void onServiceDisconnected(ComponentName componentName) {

        }
    };

    //service 通知 activity
    class LocalReceiver extends BroadcastReceiver {
        public void onReceive(Context context, Intent intent){
            String ble_data = intent.getStringExtra("ble");
            textView.setText(ble_data);
        }
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.start_service:
                Log.d(TAG,"activity start_service");
                Intent startIntent = new Intent(this,MyService.class);
                startService(startIntent);
                break;

            case R.id.bind_service:
                Log.d(TAG,"activity bind_service");
                Intent bindIntent = new Intent(this,MyService.class);
                bindService(bindIntent,connection,BIND_AUTO_CREATE);
                break;
            default:
                break;
        }
    }
}

注意：
1、 需要在清单文件注册
<service android:name=".MyService"/>

效果

image.png

TIP：

image.png

我没有myBinder = (MyService.MyBinder)iBinder;
直接拿来使用，结果崩溃了。