android 文件浏览选择 FileOpenerDialog

package com.pcm.jwt.dialog; import java.io.File; import java.util.ArrayList; import java.util.List; import android.app.Dialog; import android.content.Context; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.view.Gravity; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import android.widget.AdapterView.OnItemClickListener; import com.pcm.jwt.R; public class FileOpenerDialog extends Dialog implements android.view.View.OnClickListener { private android.widget.ListView list; ArrayAdapter<String> Adapter; ArrayList<String> arr = new ArrayList<String>(); Context context; private String path; private android.widget.TextView curFilePath; private android.widget.EditText saveFileName; private android.widget.Button home, back, ok, cancel; private android.widget.LinearLayout layout; private int type = 1; private String[] fileType = null; public final static int TypeOpen = 1; public final static int TypeSave = 2; private FileOpenerDialogListener listener; /** * @param context * @param 值为1表示OpenFileDialog * , 值为2表示SaveFileDialog * @param 需要过滤的文件类型 * ，若为空表示只显示文件夹 * @param 初始路径 * ，这个有问题 */ public FileOpenerDialog(Context context, int type, String[] fileType, String resultPath, FileOpenerDialogListener listener) { super(context); // TODO Auto-generated constructor stub this.context = context; this.type = type; this.fileType = fileType; this.path = resultPath; this.listener = listener; } @Override public void dismiss() { // TODO Auto-generated method stub super.dismiss(); } @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.dialogfilechooser); path = getSDPath(); arr = (ArrayList<String>) getDirs(path); Adapter = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, arr); list = (android.widget.ListView) findViewById(R.id.FileChooserDirList); list.setAdapter(Adapter); list.setOnItemClickListener(lvLis); home = (android.widget.Button) findViewById(R.id.FileChooserHomeBtn); home.setOnClickListener(this); back = (android.widget.Button) findViewById(R.id.FileChooserBackBtn); back.setOnClickListener(this); ok = (android.widget.Button) findViewById(R.id.FileChooserOkBtn); ok.setOnClickListener(this); cancel = (android.widget.Button) findViewById(R.id.FileChooserCancelBtn); cancel.setOnClickListener(this); layout = (android.widget.LinearLayout) findViewById(R.id.FileChooserDirLayout); // if (type == TypeOpen) { // 若为OpenFileDialog，在预留的位置添加TextView，显示当前路径 curFilePath = new android.widget.TextView(context); layout.addView(curFilePath); curFilePath.setText(path); // } else if (type == TypeSave) { // 若为SaveFileDialog，在预留的位置添加EditText，输入要保存的文件名 // saveFileName = new android.widget.EditText(context); // saveFileName.setWidth(240); // saveFileName.setHeight(70); // saveFileName.setGravity(Gravity.CENTER); // saveFileName.setPadding(0, 2, 0, 0); // layout.addView(saveFileName); // saveFileName.setText("Enter file name"); // } } // 自动更新ListView内容 Runnable add = new Runnable() { @Override public void run() { // TODO Auto-generated method stub arr.clear(); List<String> temp = getDirs(path); for (int i = 0; i < temp.size(); i++) arr.add(temp.get(i)); Adapter.notifyDataSetChanged(); } }; // 事件监听，当点击ListView的某个项目时触发 private OnItemClickListener lvLis = new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { String temp = (String) arg0.getItemAtPosition(arg2); if (temp.equals("..")) path = getSubDir(path); // 如果点击的项目是".."，表示没有子目录，返回上一级目录 else if (path.equals("/")) path = path + temp; // 如果当前目录为根目录，直接添加子目录，例 "/" -> "/sdcard" else path = path + "/" + temp; // 将子目录追加到当前目录后，例 "/sdcard" -> // "/sdcard/xml" if (type == TypeOpen) curFilePath.setText(path); Handler handler = new Handler(); handler.post(add);// 因为当前目录改变，更新子文件夹 } }; /** * Get sub directories * * @param ipath * @return */ private List<String> getDirs(String ipath) { List<String> dirs = new ArrayList<String>(); File[] files = new File(ipath).listFiles(); if (files != null) { for (File f : files) { if (f.isDirectory()) { String tmp = f.toString(); if (tmp.endsWith("/")) tmp = tmp.substring(0, tmp.length() - 1); int pos = tmp.lastIndexOf("/"); dirs.add(tmp.substring(pos + 1, tmp.length())); } else if (f.isFile() && fileType != null) { for (int i = 0; i < fileType.length; i++) { int typeStrLen = fileType[i].length(); String fileName = f.getPath().substring( f.getPath().length() - typeStrLen); if (fileName.equalsIgnoreCase(fileType[i])) dirs.add(f.toString().substring(path.length() + 1, f.toString().length())); } } } } if (dirs.size() == 0) dirs.add(".."); return dirs; } @Override public void onClick(View args0) { // TODO Auto-generated method stub if (args0.getId() == home.getId()) { // 点击"Home"按钮，回到根目录 path = getRootDir(); if (type == TypeOpen) curFilePath.setText(path); Handler handler = new Handler(); // 更新子文件夹 handler.post(add); // 更新子文件夹 } else if (args0.getId() == back.getId()) { // 点击"Back"按钮，返回上一级文件夹 path = getSubDir(path); if (type == TypeOpen) curFilePath.setText(path); Handler handler = new Handler(); handler.post(add); // 更新子文件夹 } else if (args0.getId() == ok.getId()) { // 点击"OK"按钮，关闭对话框，调用自定义监视器的OnOKClick方法，将当前目录返回主Activity if (type == TypeOpen) { if(!new File(path).isDirectory()){ dismiss(); listener.OnOkClick(path); } }else if (type == TypeSave) { if(new File(path).isDirectory()){ dismiss(); listener.OnOkClick(path); } } } else if (args0.getId() == cancel.getId()) { // 点击"Cancel”按钮 this.cancel(); } } /** * Get SD card directory, if SD card not exist, return '/' * * @return */ private String getSDPath() { File sdDir = null; boolean sdCardExist = Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED); // 判断是否存在SD卡 if (sdCardExist) { sdDir = Environment.getExternalStorageDirectory(); // 如果SD卡存在，返回SD卡的目录 } if (sdDir == null) { return "/"; // 如果SD卡不存在，返回根目录 } return sdDir.toString(); } private String getRootDir() { return "/"; } /** * Get upper directory * * @param path * @return */ private String getSubDir(String path) { String subpath = "/"; if (path.endsWith("/")) { path = path.substring(0, path.length() - 1); } int pos = path.lastIndexOf("/"); if (pos > 0) { subpath = path.substring(0, pos); } return subpath; } }