Android文件浏览器

1.接口

package com.gst.user.application.tools;

/**
* Created by user on 12/22/15.
*/
public interface OnFileBrowserListener {
public void onFileItemClick(String fileName);
public void onDirItemClick(String path);
}
2.
package com.gst.user.application.tools;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import android.content.Context;
import android.graphics.Color;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class FileBrowser extends ListView implements
android.widget.AdapterView.OnItemClickListener
{
private final String namespace = "http://com.gst.user.application.tools";
private String sdcardDirectory;
private List<File> fileList = new ArrayList<File>();
private Stack<String> dirStack = new Stack<String>();
private FileListAdapter fileListAdapter;
private OnFileBrowserListener onFileBrowserListener;

private int folderImageResId;
private int otherFileImageResId;
private Map<String, Integer> fileImageResIdMap = new HashMap<String, Integer>();
private boolean onlyFolder = false;

public FileBrowser(Context context, AttributeSet attrs)
{
super(context, attrs);
sdcardDirectory = android.os.Environment.getExternalStorageDirectory()
.toString();
setOnItemClickListener(this);
setBackgroundColor(Color.WHITE);

folderImageResId = attrs.getAttributeResourceValue(namespace,
"folderImage", 0);
otherFileImageResId = attrs.getAttributeResourceValue(namespace,
"otherFileImage", 0);
onlyFolder = attrs.getAttributeBooleanValue(namespace, "onlyFolder",
false);
int index = 1;
while (true)
{
String extName = attrs.getAttributeValue(namespace, "extName"
+ index);
int fileImageResId = attrs.getAttributeResourceValue(namespace,
"fileImage" + index, 0);

if ("".equals(extName) || extName == null || fileImageResId == 0)
{
break;
}
fileImageResIdMap.put(extName, fileImageResId);
index++;
}

dirStack.push(sdcardDirectory);
addFiles();

fileListAdapter = new FileListAdapter(getContext());
setAdapter(fileListAdapter);

}

private void addFiles()
{
fileList.clear();
String currentPath = getCurrentPath();
File[] files = new File(currentPath).listFiles();
if (dirStack.size() > 1)
fileList.add(null);
for (File file : files)
{
if (onlyFolder)
{
if (file.isDirectory())
fileList.add(file);
}
else
{
fileList.add(file);
}
}
}

private String getCurrentPath()
{
String path = "";
for (String dir : dirStack)
{
path += dir + "/";
}
path = path.substring(0, path.length() - 1);
return path;
}

private String getExtName(String filename)
{

int position = filename.lastIndexOf(".");
if (position >= 0)
return filename.substring(position + 1);
else
return "";
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id)
{
if (fileList.get(position) == null)
{
dirStack.pop();
addFiles();
fileListAdapter.notifyDataSetChanged();
if (onFileBrowserListener != null)
{
onFileBrowserListener.onDirItemClick(getCurrentPath());
}
}
else if (fileList.get(position).isDirectory())
{
dirStack.push(fileList.get(position).getName());
addFiles();
fileListAdapter.notifyDataSetChanged();
if (onFileBrowserListener != null)
{
onFileBrowserListener.onDirItemClick(getCurrentPath());
}
}
else
{
if (onFileBrowserListener != null)
{
String filename = getCurrentPath() + "/"
+ fileList.get(position).getName();
onFileBrowserListener.onFileItemClick(filename);
}
}

}

private class FileListAdapter extends BaseAdapter
{
private Context context;

public FileListAdapter(Context context)
{
this.context = context;
}

@Override
public int getCount()
{
return fileList.size();
}

@Override
public Object getItem(int position)
{
return fileList.get(position);
}

@Override
public long getItemId(int position)
{
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent)
{
LinearLayout fileLayout = new LinearLayout(context);
fileLayout.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
fileLayout.setOrientation(LinearLayout.HORIZONTAL);
fileLayout.setPadding(5, 10, 0, 10);
ImageView ivFile = new ImageView(context);
ivFile.setLayoutParams(new LayoutParams(48, 48));
TextView tvFile = new TextView(context);
tvFile.setTextColor(android.graphics.Color.WHITE);
tvFile.setTextAppearance(context,
android.R.style.TextAppearance_Large);

tvFile.setPadding(5, 5, 0, 0);
if (fileList.get(position) == null)
{

if (folderImageResId > 0)
ivFile.setImageResource(folderImageResId);
tvFile.setText(". .");
}
else if (fileList.get(position).isDirectory())
{
if (folderImageResId > 0)
ivFile.setImageResource(folderImageResId);
tvFile.setText(fileList.get(position).getName());
}
else
{
tvFile.setText(fileList.get(position).getName());
Integer resId = fileImageResIdMap.get(getExtName(fileList.get(
position).getName()));
int fileImageResId = 0;
if (resId != null)
{
if (resId > 0)
{
fileImageResId = resId;
}

}
if (fileImageResId > 0)
ivFile.setImageResource(fileImageResId);
else if (otherFileImageResId > 0)
ivFile.setImageResource(otherFileImageResId);
}

tvFile.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
fileLayout.addView(ivFile);
fileLayout.addView(tvFile);
return fileLayout;
}
}

public void setOnFileBrowserListener(OnFileBrowserListener listener)
{
this.onFileBrowserListener = listener;
}
}