Android studio 广播的简单使用代码详解

<?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:gravity=\"center\"
    tools:context=\".MainActivity3\">
    
    <Button
        android:id=\"@+id/send\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        android:text=\"发送广播\"></Button>
        
</LinearLayout>

public class MyBrodestReciver extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {
            //判断action是否为添加的action，如果是则toast
            String action = intent.getAction();
            if (action.equals(\"one_brodest\")){
                Toast.makeText(context, \"发送了一个广播\", Toast.LENGTH_SHORT).show();
            }
        }
    }

//新建intentFilter对象 通过addAction添加广播
     IntentFilter intentFilter = new IntentFilter();
     intentFilter.addAction(\"one_brodest\");

//注册广播
     MyBrodestReciver myBrodestReciver = new MyBrodestReciver();
     registerReceiver(myBrodestReciver,intentFilter);

//做一个点击事件发送一个广播
     send.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             Intent intent = new Intent();
             intent.setAction(\"one_brodest\");
             sendBroadcast(intent);
         }
     });

@Override
    protected void onDestroy() {
        super.onDestroy();
        //销毁广播
        unregisterReceiver(brodestReciver);
    }