filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + \"/ADASiteMaps/SigRecord\";
File file=new File(filePath);
File[] files = file.listFiles();
构造Adapter,
for(File mCurrentFile:files){
mFileName.add(mCurrentFile.getName());
}
ArrayAdapter<String> mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1,mFileName);
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