package com.TestView.layer; import java.io.File; import java.io.FilenameFilter; import android.app.Activity; import android.os.Environment; import android.widget.Toast; public class LayerListClass { Activity activity; private Toast toast; private File file; public LayerListClass(Activity activity) { this.activity = activity; } public String getFilesName() { file = new File(getLayerListBySdCard()); if (!file.exists()) { showToast(getLayerListBySdCard() + "路径不存在"); return null; } File[] files = file.listFiles(new FilenameFilter() { public boolean accept(File dir, String filename) { return filename.endsWith(".tpk"); } }); String aa = ""; for (int i = 0; i < files.length; i++) { aa += files[i].getName() + "---->>"; } showToast(aa); return aa; } private String getLayerListBySdCard() { if (!isSdCardExist()) { showToast("SD卡不存在"); return null; } String sdpath = getSdCardPath(); return sdpath; } /** * 1、判断SD卡是否存在 * * @return */ private boolean isSdCardExist() { boolean isExist = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED); return isExist; } /** * 2、获取SD卡目录 * * @return */ private String getSdCardPath() { String sdpath = ""; sdpath = Environment.getExternalStorageDirectory().toString(); sdpath = sdpath + "/ArcGIS"; return sdpath; } /** * 显示Toast内容 * * @param msg */ private void showToast(String msg) { if (toast == null) { toast = Toast.makeText(activity, msg, Toast.LENGTH_SHORT); } else { toast.setText(msg); } toast.show(); } }