求帮组，我的应用程序为啥mount不了sd卡？

2013-05-30 12:54:56 136 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Android SD卡 mount 1.系统开机启动监听mount服务 android sdcard热插拔监测和执行是由vold守护进程管理的，系统开机会读取初始化配置文件init.rc,高通的init.rc位于/system/core/rootdir/xxx/etc/下里面默认启动vold服务。如果要对该文件作出修改，要重新编译一下boot.img镜像文件，烧录进android系统，之后可以在android的文件系统根目阅读详情

public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mText = (TextView) findViewById(R.id.textView);
b_mount = (Button)findViewById(R.id.button1);
b_umount = (Button)findViewById(R.id.button2);

if (mMountService == null)
{
IBinder service = ServiceManager.getService("mount");
if(service != null)
{
Log.i(TAG, "success to get service_mount");
mMountService = IMountService.Stub.asInterface(service);
}
else
{
Log.e(TAG, "Can't get mount service");
}
}

if (mStorageManager == null)
{
mStorageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
if(mStorageManager == null){
Log.e(TAG, "Failed to get StorageManager");
}
Log.i(TAG, "success to get StorageManager");
mStorageManager.registerListener(mStorageListener);
}
/*
try
{
String state = mMountService.getVolumeState(MOUNTPOINT);
mText.setText("Media state " + state);
if (state.equals(Environment.MEDIA_MOUNTED))
mMountService.unmountVolume(MOUNTPOINT, true, true);

else if (state.equals(Environment.MEDIA_UNMOUNTED))
mMountService.mountVolume(MOUNTPOINT);
} catch (RemoteException e)
{
e.printStackTrace();
}
*/
b_mount.setOnClickListener(new OnClickListener(){
public void onClick(View v){
try{
Log.i(TAG, "mount button click");
mMountService.mountVolume(MOUNTPOINT);
}catch(RemoteException e)
{
Log.e(TAG, "mount click Exception");
e.printStackTrace();
}
}
});

b_umount.setOnClickListener(new OnClickListener(){
public void onClick(View v){
try{
Log.i(TAG, "unmount button click");
mMountService.unmountVolume(MOUNTPOINT, true, false);
}catch(RemoteException e)
{
Log.e(TAG, "unmount click Exception");
e.printStackTrace();
}
}
});

}

protected void onDestroy()
{
if(mStorageManager != null && mStorageListener != null)
mStorageManager.unregisterListener(mStorageListener);
super.onDestroy();
}
}
是用按钮实现的，奇怪为啥手机里setting里可以通过mount方法来挂载，为什么我的应用里操作不了呢？？

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