public class GridViewFile extends Activity implementsView.OnClickListener {privateContext context;privateTextView tv_title, textView;privateGridView listView;private final String MUSIC_PATH = "/";//记录当前路径下 的所有文件的数组

File currentParent;//记录当前路径下的所有文件的文件数组

File[] currentFiles;

@Overrideprotected voidonCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

context= this;

initView();

}public voidinitView() {

findViewById(R.id.public_top_img_close).setOnClickListener(this);

listView=(GridView) findViewById(R.id.gridview);

textView=(TextView) findViewById(R.id.llss);

onLoad();

}public voidonLoad() {

ListSongsName();

}private voidListSongsName() {//获取系统的SD卡目录

File root = newFile(MUSIC_PATH);//如果SD卡存在

if(root.exists()) {

currentParent=root;

currentFiles= root.listFiles();//获取root目录下的所有文件//使用当前陆慕下的全部文件，文件夹来填充ListView

inflateListView(currentFiles);

}//为ListView的列表项的单击事件绑定监视器

listView.setOnItemClickListener(newAdapterView.OnItemClickListener() {

@Overridepublic void onItemClick(AdapterView>parent, View view,int position, longid) {//用户点击了文件，则调用手机已安装软件操作该文件

if(currentFiles[position].isFile()) {

onError(currentFiles[position].getPath()+ "1");

Intent intent=OpenFile.openFile(currentFiles[position]

.getPath());

startActivity(intent);

}else{//获取currentFiles[position]路径下的所有文件

File[] tmp =currentFiles[position].listFiles();if (tmp == null || tmp.length == 0) {

Toast.makeText(GridViewFile.this, "空文件夹!",

Toast.LENGTH_SHORT).show();

}//if

else{//获取用户单击的列表项对应的文件夹，设为当前的父文件夹

currentParent =currentFiles[position];//保存当前文件夹内的全部问价和文件夹

currentFiles =tmp;

inflateListView(currentFiles);

}

}

}

});

}//更新列表

private voidinflateListView(File[] files) {if (files.length == 0)

Toast.makeText(GridViewFile.this, "sd卡不存在", Toast.LENGTH_SHORT)

.show();else{//创建一个List集合,List集合的元素是Map

List> listItems = new ArrayList>();for (int i = 0; i < files.length; i++) {

Map listItem = new HashMap();//如果当前File是文件夹，使用folder图标；否则使用file图标

Log.i("path", files[i].getPath());

Log.i("path", files[i].getName());if(files[i].isDirectory())

listItem.put("icon", R.drawable.file_wenjianjia);//else if(files[i].isFi)

elselistItem.put("icon", R.drawable.file_wenjian1);

listItem.put("fileName", files[i].getName());//添加List项

listItems.add(listItem);

}//创建一个SimpleAdapter

SimpleAdapter simpleAdapter = new SimpleAdapter(this, listItems,

R.layout.acheshi_item,new String[] { "icon", "fileName"},new int[] { R.id.imageView1, R.id.text_path });//位ListView设置Adpter

listView.setAdapter(simpleAdapter);try{

textView.setText("当前路径为：" +currentParent.getCanonicalPath());

}catch(IOException e) {

e.printStackTrace();

}

}

}

@Overridepublic voidonClick(View v) {

onbey();

}//返回上层菜单

private voidonbey() {try{if (!MUSIC_PATH.equals(currentParent.getCanonicalPath())) {//获取上一层目录

currentParent =currentParent.getParentFile();//列出当前目录下的所有文件

currentFiles =currentParent.listFiles();//再次更新ListView

inflateListView(currentFiles);

}else{new AlertDialog.Builder(this)

.setIcon(R.drawable.ic_launcher)

.setTitle("提示")

.setMessage("确定要退出吗？")

.setPositiveButton("确定",newDialogInterface.OnClickListener() {

@Overridepublic voidonClick(DialogInterface dialog,intwhich) {

finish();

}

})

.setNegativeButton("取消",newDialogInterface.OnClickListener() {

@Overridepublic voidonClick(DialogInterface dialog,intwhich) {

}

}).create().show();

}

}catch(Exception e) {

e.printStackTrace();

}

}public voidonError(Object error) {

Toast.makeText(getApplicationContext(), error+ "", Toast.LENGTH_LONG)

.show();

}protected voidonDestroy() {super.onDestroy();

}

}