ListView文件浏览器

FileBrowser.java

private List<String> items = null;
	private List<String> paths = null;
	private String rootPath = "/";
	
	private TextView mPath;
	private ListView listView1;
	
	protected void onCreate(Bundle icicle) {
		
		super.onCreate(icicle);
		setContentView(R.layout.file_browser);
		
		mPath = (TextView) findViewById(R.id.textView1);
		listView1 = (ListView) findViewById(R.id.listView1);
		getFileDir(rootPath);
	}

	/* 取得文件架构的method */
	private void getFileDir(String filePath) {
		/* 设定目前所在路径 */
		mPath.setText(filePath);

		items = new ArrayList<String>();
		paths = new ArrayList<String>();
		File f = new File(filePath);
		File[] files = f.listFiles();

		if (!filePath.equals(rootPath)) {
			/* 第一笔设定为[回到根目录] */
			items.add("返回根目录");
			paths.add(rootPath);
			/* 第二笔设定为[回上层] */
			items.add("返回上一层");
			paths.add(f.getParent());
		}
		
		/* 将所有文件加入ArrayList中 */
		for (int i = 0; i < files.length; i++) {
			File file = files[i];
			items.add(file.getName());
			paths.add(file.getPath());
		}

		/*
		 * 声明一ArrayAdapter，使用file_row这个Layout， 并将Adapter设定给此ListActivity
		 */
		ArrayAdapter<String> listItemAdapter = new ArrayAdapter<String>(this, R.layout.list_item2, items);
		listView1.setAdapter(listItemAdapter);
		
		listView1.setOnItemClickListener(new ListView.OnItemClickListener(){

			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				File file = new File(paths.get(arg2));
				if (file.canRead()) {
					if (file.isDirectory()) {
						/* 如果是文件夹就再进去读取 */
						getFileDir(paths.get(arg2));
					} else {
						/* 如果是文件，则弹出AlertDialog */
						new AlertDialog.Builder(FileBrowser.this)
								.setTitle("Message")
								.setMessage("[" + file.getName() + "] is File!")
								.setPositiveButton("OK",
										new DialogInterface.OnClickListener() {
											public void onClick(DialogInterface dialog,
													int which) {
											}
										}).show();
					}
				} else {
					/* 弹出AlertDialog显示权限不足 */
					new AlertDialog.Builder(FileBrowser.this)
							.setTitle("Message")
							.setMessage("权限不足!")
							.setPositiveButton("OK",
									new DialogInterface.OnClickListener() {
										public void onClick(DialogInterface dialog,
												int which) {
										}
									}).show();
				}
			}
			
		});
	}

file_browser.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent"
	android:orientation="vertical"
	android:background="@color/white">
	<TextView
		android:text="TextView"
		android:id="@+id/textView1"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:textColor="@color/black"></TextView>
	<ListView
		android:layout_height="wrap_content"
		android:id="@+id/listView1"
		android:layout_width="fill_parent"
		android:cacheColorHint="#00000000"></ListView>
</LinearLayout>