遍历android根目录的简单资源查看器

效果如图：

package com.txl.sua;

import java.io.File;
import java.util.List;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

public class FileListAdapter extends ArrayAdapter<File> {

	public FileListAdapter(Context context, int Resource, List<File> objects) {
		super(context, Resource, objects);
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		TextView view = (TextView) super.getView(position, convertView, parent);
		File file = getItem(position);
		if (position == 0)
			view.setText(view.getResources().getString(R.string.current_folder)
					+ file.getAbsolutePath());
		else if (position == 1 && !isRoot())
			view.setText(R.string.to_parent_folder);
		else
			view.setText(file.getName());
		return view;
	}

	public boolean isRoot() {
		return getItem(0).getParent() == null;
	}

}

 

package com.txl.sua;

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.List;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ListView;

public class SearchUpdateApkActivity extends ListActivity {

	private FileListAdapter fileList;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		fill(new File("/"));
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK && !fileList.isRoot()) {
			fill(fileList.getItem(1));
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		File file = fileList.getItem(position);
		if (file.isDirectory())
			fill(file);
	}

	private static final FileFilter IMAGES_FILTER = new FileFilter() {
		public boolean accept(File file) {
			return file.isDirectory()
					|| file.getName().matches("^*.*$");// ("^.*?\\.(jpg|png|bmp|gif)$")
		}
	};

	private void fill(File folder) {
		List<File> files = new ArrayList<File>();
		files.add(folder);
		if (folder.getParentFile() != null)
			files.add(folder.getParentFile());

		for (File file : folder.listFiles(IMAGES_FILTER)) {
			files.add(file);
		}

		fileList = new FileListAdapter(this, R.layout.file_row, files);
		setListAdapter(fileList);
	}
}

 

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/text1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />