主类
public class main extends ListActivity/*继承这个类就可以直接进入安卓文件目录*/{
private static final String ROOT_PATH = "/"; //存储文件名称 private ArrayList<String> mFileName = null; //存储文件路径 private ArrayList<String> mFilePath = null; //重命名布局xml文件显示dialog private View view; private EditText editText; /** * Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //显示文件列表 showFileDir(ROOT_PATH); } /** * 扫描显示文件列表 ,第一次才这样 * @param path */ private void showFileDir(String path) { mFileName = new ArrayList<String>(); mFilePath = new ArrayList<String>();// ------路径------- File file = new File(path); File[] files = file.listFiles(); //如果当前目录不是根目录,预防万一 if (!ROOT_PATH.equals(path)) { mFileName.add("@1"); mFilePath.add(ROOT_PATH); mFileName.add("@2"); mFilePath.add(file.getParent()); } //添加所有文件 for (File f : files) { mFileName.add(f.getName()); mFilePath.add(f.getPath()); } this.setListAdapter(new MyAdapter(this, mFileName, mFilePath)); } /** * 点击事件,点击文件夹获取路径 * @param l * @param v * @param position * @param id */ @Override protected void onListItemClick(ListView l, View v, int position, long id) { String path = mFilePath.get(position); File file = new File(path); // 文件存在并可读 if (file.exists() && file.canRead()) { if (file.isDirectory()) { //显示子目录及文件 -----------------我要学的------------------ showFileDir(path); } else { //处理文件 fileHandle(file); } } //没有权限 else { Resources res = getResources(); new AlertDialog.Builder(this).setTitle("Message") .setMessage(res.getString(R.drawable.ic_launcher)) .setPositiveButton("OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(getApplicationContext(), "打开不了", Toast.LENGTH_SHORT).show(); } }).show(); } super.onListItemClick(l, v, position, id); } //对文件进行增删改 private void fileHandle(final File file) { DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 打开文件 if (which == 0) { openFile(file); //--------------------我要学的------------------- } //修改文件名 else if (which == 1) { LayoutInflater factory = LayoutInflater.from(main.this); view = factory.inflate(R.layout.rename_dialog, null); editText = (EditText) view.findViewById(R.id.editText); editText.setText(file.getName()); DialogInterface.OnClickListener listener2 = new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub String modifyName = editText.getText().toString(); final String fpath = file.getParentFile().getPath(); final File newFile = new File(fpath + "/" + modifyName); if (newFile.exists()) { //排除没有修改情况 if (!modifyName.equals(file.getName())) { new AlertDialog.Builder(main.this) .setTitle("注意!") .setMessage("文件名已存在,是否覆盖?") .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { if (file.renameTo(newFile)) { showFileDir(fpath); displayToast("重命名成功!"); } else { displayToast("重命名失败!"); } } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }) .show(); } } else { if (file.renameTo(newFile)) { showFileDir(fpath); displayToast("重命名成功!"); } else { displayToast("重命名失败!"); } } } }; AlertDialog renameDialog = new AlertDialog.Builder(main.this).create(); renameDialog.setView(view); renameDialog.setButton("确定", listener2); renameDialog.setButton2("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub } }); renameDialog.show(); }else if (which ==2) {//音乐 //找路径 Toast.makeText(getApplicationContext(), "我是音乐", Toast.LENGTH_LONG).show(); Music.IntetnMusic(main.this, file.getName(), file.getPath()); }else if (which == 3) {//视频 Toast.makeText(getApplicationContext(), "我是视频", Toast.LENGTH_LONG).show(); Video.ActivityVideo(main.this, file.getName(), file.getPath()); } //删除文件 else { new AlertDialog.Builder(main.this) .setTitle("注意!") .setMessage("确定要删除此文件吗?") .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { if (file.delete()) { //更新文件列表 showFileDir(file.getParent()); displayToast("删除成功!"); } else { displayToast("删除失败!"); } } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }).show(); } } }; //选择文件时,弹出增删该操作选项对话框 String[] menu = {"打开文件", "重命名","播放音乐","播放视频", "删除文件"}; new AlertDialog.Builder(main.this) .setTitle("请选择要进行的操作!") .setItems(menu, listener) .setPositiveButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }).show(); } //打开文件 private void openFile(File file) { Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setAction(android.content.Intent.ACTION_VIEW); String type = getMIMEType(file); intent.setDataAndType(Uri.fromFile(file), type); startActivity(intent); } //获取文件mimetype private String getMIMEType(File file) { String type = ""; String name = file.getName(); //文件扩展名 String end = name.substring(name.lastIndexOf(".") + 1, name.length()).toLowerCase(); if (end.equals("m4a") || end.equals("mp3") || end.equals("wav")) { type = "audio"; } else if (end.equals("mp4") || end.equals("3gp")) { type = "video"; } else if (end.equals("jpg") || end.equals("png") || end.equals("jpeg") || end.equals("bmp") || end.equals("gif")) { type = "image"; } else { //如果无法直接打开,跳出列表由用户选择 type = "*"; //调用系统选项 } type += "/*"; return type; } private void displayToast(String message) { Toast.makeText(main.this, message, Toast.LENGTH_SHORT).show(); } public boolean onCreateOptionsMenu(Menu menu) { //super.getMenuInflater().inflate(R.menu.main_menu, menu); menu.add(Menu.NONE, Menu.FIRST + 1, 7, "新建") .setIcon(android.R.drawable.ic_menu_send); menu.add(Menu.NONE, Menu.FIRST + 2, 3, "取消") .setIcon(android.R.drawable.ic_menu_edit); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case Menu.FIRST + 1:{ final EditText editText = new EditText(main.this); new AlertDialog.Builder(main.this).setTitle("请输入文件名称").setView(editText).setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub String mFileName = editText.getText().toString(); String IMAGES_PATH = Environment.getExternalStorageDirectory() + "/" + mFileName + "/"; //获取根目录 //String IMAGES_PATH = getApplicationContext().getFilesDir().getAbsolutePath() + "/" + mFileName + "/"; createMkdir(IMAGES_PATH); } }).setNegativeButton("取消", null).show(); } break; case Menu.FIRST + 2: Toast.makeText(this, "取消", Toast.LENGTH_LONG).show(); break; } return false; } public static void createMkdir(String folderPath) { File folder = new File(folderPath); if (!folder.exists()) { folder.mkdir(); } } public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) { finish(); return true; } else { return super.onKeyDown(keyCode, event); } }}适配器:
public class MyAdapter extends BaseAdapter{
private LayoutInflater inflater; private Bitmap directory, file; //存储文件名称 private ArrayList<String> names = null; //存储文件路径 private ArrayList<String> paths = null; //参数初始化 public MyAdapter(Context context, ArrayList<String> na, ArrayList<String> pa) { names = na; paths = pa; directory = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_launcher); file = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_launcher); //缩小图片 directory = small(directory, 0.16f); file = small(file, 0.1f); inflater = LayoutInflater.from(context); } @Override public int getCount() { // TODO Auto-generated method stub return names.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return names.get(position); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHolder holder; if (null == convertView) { convertView = inflater.inflate(R.layout.file, null); holder = new ViewHolder(); holder.text = (TextView) convertView.findViewById(R.id.textView); holder.image = (ImageView) convertView.findViewById(R.id.imageView); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } File f = new File(paths.get(position).toString()); if (names.get(position).equals("@1")) { holder.text.setText("/"); holder.image.setImageBitmap(directory); } else if (names.get(position).equals("@2")) { holder.text.setText(".."); holder.image.setImageBitmap(directory); } else { holder.text.setText(f.getName()); if (f.isDirectory()) { holder.image.setImageBitmap(directory); } else if (f.isFile()) { holder.image.setImageBitmap(file); } else { System.out.println(f.getName()); } } return convertView; } private class ViewHolder { private TextView text; private ImageView image; } private Bitmap small(Bitmap map, float num) { Matrix matrix = new Matrix(); matrix.postScale(num, num); return Bitmap.createBitmap(map, 0, 0, map.getWidth(), map.getHeight(), matrix, true); } }