问题描述

关于安卓全局喇叭的问题，我是新手

我要发送一个保准的广播，内容是MY_BROADCAST，首先我定义了一个类，集成BroadcastReceiver，在里面的onReceiver函数中写出收到这条广播后的反应，代码如下：
package com.example.broadcasttest;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class MyBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context,Intent intent)
    {
        Toast.makeText(context, "received in mybroadcastreceiver", Toast.LENGTH_LONG).show();
    }

}
然后我为这个类和接收的广播做注册，代码如下：

最后我在为主函数添加按钮并且写事件监听，代码如下：
Button button01=(Button)findViewById(R.id.button_01);
button01.setOnClickListener(new OnClickListener()
{
public void onClick(View view)
{
Intent intent=new Intent("com.example.broadcasttest.MY_BROADCAST");
sendBroadcast(intent);
}
});
但是事实上我在运行程序的时候按完按钮却什么也不显示，请问各位大神们这是怎么回事呀？

解决方案

你得先注册广播，注册广播分为两种，一种 是静态注册，一种是动态注册，而且你的public void onReceive(Context context,Intent intent)
{
Toast.makeText(context, "received in mybroadcastreceiver", Toast.LENGTH_LONG).show();
}
写错了
得这样写：
public void onReceive(Context context,Intent intent)
{ if(intent.getAction().equals("com.example.broadcasttest.MY_BROADCAST")){
Toast.makeText(context, "received in mybroadcastreceiver", Toast.LENGTH_LONG).show();
}
Toast.makeText(context, "received in mybroadcastreceiver", Toast.LENGTH_LONG).show();
}

解决方案二：

public void onReceive(Context context,Intent intent)
{ if(intent.getAction().equals("com.example.broadcasttest.MY_BROADCAST")){
Toast.makeText(context, "received in mybroadcastreceiver", Toast.LENGTH_LONG).show();
}

}