安卓下选择文件夹功能，详细介绍;http://blog.csdn.net/qiujuer/article/details/20696213

package com.demo.pr5; import java.io.File; import java.util.Vector; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.view.ViewGroup; import a