带有活动的广播接收器服务反馈不起作用

Posted 2023-04-19

【中文标题】带有活动的广播接收器服务反馈不起作用

【英文标题】：Broadcast Receiver service feedback with activity not work

【发布时间】：2018-11-27 03:37:23

【问题描述】：

我为带有活动的服务反馈创建了一个广播接收器。但这不起作用。调试器 -- 从服务调用 sendBroadcast 后，跳过此 (LocalBroadcastManager.getInstance(this).sendBroadcast(RTReturn);) 行并且不会导致 Activity

This is Activity
package com.example.my;

 BroadcastReceiver br;
public static final String RECEIVE_JSON = 
"com.example.my.RECEIVE_JSON";
 public class cama extends AppCompatActivity
@Override
protected void onCreate(Bundle savedInstanceState) 
    xcxc();
    xcx();
            

    public void xcxc()
    
     br = new BroadcastReceiver() 
    @Override
    public void onReceive(Context context, Intent intent) 
        if(intent.getAction().equals(RECEIVE_JSON)) 
        String serviceJsonString = intent.getStringExtra("json");
                Toast toast = Toast.makeText(getApplicationContext(),
                        "Test!", Toast.LENGTH_SHORT);
                toast.show();
        
         
        ;
   
public void xcx()

    LocalBroadcastManager bManager;
    bManager = LocalBroadcastManager.getInstance(this);
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(RECEIVE_JSON);
    bManager.registerReceiver(br, intentFilter);


      @Override
public void onDestroy() 
    super.onDestroy();
    if (br != null) 
    unregisterReceiver(br);
    
       

这是服务

package com.example.my;
public class MyService extends Service
      @Override
     public void onCreate() 
       do_anything();
         
     public void do_anything()
     Intent RTReturn = new Intent(cama.RECEIVE_JSON);
     RTReturn.putExtra("json", "ole");
     LocalBroadcastManager.getInstance(this).sendBroadcast(RTReturn);

【问题讨论】：

提供完整的活动广播代码

这个完整的鳕鱼在 Activity 中带有 BroadcastReceiver

您是如何在onCreate() 中创建xcxc() 的？？

受保护的 void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_cama); xcxc();

显示你的清单文件...

【参考方案1】：

只在onCreate(Bundle savedInstanceState)内部使用：

LocalBroadcastManage 
mlocal = LocalBroadcastManager.getInstance(getApplicationContext());

mlocal.sendBroadcast(YOUR Reciever)