插入SD卡读取SD上内容，否则读取本地路径内容的代码(ZT)

//自己写一个广播监听函数

private final BroadcastReceiver broadcastRec =  new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(“android.intent.action.MEDIA_MOUNTED”))//SD卡已经成功挂载
{
imagepath = android.os.Environment.getExternalStorageDirectory();//你的SD卡路径
}

}else if(intent.getAction().equals(“android.intent.action.MEDIA_REMOVED”)//各种未挂载状态
||intent.getAction().equals(“android.intent.action.ACTION_MEDIA_UNMOUNTED”)
||intent.getAction().equals(“android.intent.action.ACTION_MEDIA_BAD_REMOVAL”))
{
imagepath = android.os.Environment.getDataDirectory();//你的本地路径
}
}
};

//在IntentFilter中选择你要监听的行为
IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);

intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);

intentFilter.addAction(Intent.ACTION_MEDIA_REMOVED);

//intentFilter.addAction(Intent.ACTION_MEDIA_SHARED);

intentFilter.addAction(Intent.ACTION_MEDIA_BAD_REMOVAL);

//intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED);

//intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);

intentFilter.addDataScheme(“file”);

registerReceiver(broadcastRec, intentFilter);//注册监听函数

unregisterReceiver(broadcastRec);//使用完注销广播监听函数