SD卡监听---BroadcastReceiver

package com.demo.sdcard;

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

public class SDReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
//判断收到的广播类型
//获取广播中的action
String action = intent.getAction();

if(Intent.ACTION_MEDIA_MOUNTED.equals(action)){
Toast.makeText(context, "sd卡就绪", 0).show();
}else if(Intent.ACTION_MEDIA_REMOVED.equals(action)){
Toast.makeText(context, "sd卡拔出", 0).show();
}else if(Intent.ACTION_MEDIA_UNMOUNTED.equals(action)){
Toast.makeText(context, "sd卡卸载", 0).show();
}
}

}

xml注册广播和添加sd卡状态

<pre name="code" class="java"><receiverandroid:name="com.demo.sdcard.SDReceiver"><intent-filter ><!-- 添加SD卡的状态    就绪，拔出，卸载 --><action android:name="android.intent.action.MEDIA_MOUNTED"/><action android:name="android.intent.action.MEDIA_REMOVED"/><action android:name="android.intent.action.MEDIA_UNMOUNTED"/></intent-filter></receiver>