android sd卡装载卸载,android开发教程之卸载sd卡对MediaServer的处理

下面这段代码是android中music中的处理代码：

mediaplayer.onerrorlistener errorlistener = new mediaplayer.onerrorlistener() {

public boolean onerror(mediaplayer mp, int what, int extra) {

switch (what) {

case mediaplayer.media_error_server_died:

misinitialized = false;

mcurrentmediaplayer.release();

mcurrentmediaplayer = new compatmediaplayer();

mcurrentmediaplayer.setwakemode(mediaplaybackservice.this, powermanager.partial_wake_lock);

mhandler.sendmessagedelayed(mhandler.obtainmessage(server_died), 2000);

return true;

default:

log.d("multiplayer", "error: " + what + "," + extra);

break;

}

return false;

}

};

简单来看，就是遇到mediaserver died这种情况，就release掉原来的mediaplayer,然后重新创建一个mediaplayer(会在mediaserver重新启动后关联起来)。然后可以根据原来的状态做相应的动作。