ListView带图标而且可以打开的文件浏览器

ListView带图标并且可以打开的文件浏览器

主程序：

 

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
		 */
		MyListAdapter myListAdapter = new MyListAdapter(this ,items , paths);
		listView1.setAdapter(myListAdapter);

		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 {
						openFile(file);//自定义打开文件的方法
					}
				} else {
					/* 弹出AlertDialog显示权限不足 */
					new AlertDialog.Builder(IconFileBrowser.this)
							.setTitle("Message")
							.setMessage("权限不足!")
							.setPositiveButton("OK",
									new DialogInterface.OnClickListener() {
										public void onClick(
												DialogInterface dialog,
												int which) {
										}
									}).show();
				}
			}

		});

 MyListAdapter.class

 

public class MyListAdapter extends BaseAdapter{
		
		private Context context;
		private List<String> fileName , filePath;
		
		public MyListAdapter(Context context , List<String> fileName , List<String> filePath){
			this.context = context;
			this.fileName = fileName;
			this.filePath = filePath;
		}

		public int getCount() {
			return fileName.size();
		}

		public Object getItem(int position) {
			return fileName.get(position);
		}

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

		public View getView(int position, View convertView, ViewGroup parent) {
			LayoutInflater inflater = LayoutInflater.from(context);//LayoutInflater inflater = getLayoutInflater();
			View layout = inflater.inflate(R.layout.list_item3 , null);
			ImageView image = (ImageView) layout.findViewById(R.id.imageView1);
			File file = new File(filePath.get(position));
			if(file.isDirectory()){
				image.setImageResource(R.drawable.folder);
			}
			else image.setImageResource(R.drawable.doc);
			TextView title = (TextView) layout.findViewById(R.id.textView1);
			title.setText(fileName.get(position));
			return layout;
		}
		
	}

 list_item3.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">
	<LinearLayout
		android:layout_width="fill_parent"
		android:id="@+id/linearLayout1"
		android:layout_height="wrap_content">
		<ImageView
			android:id="@+id/imageView1"
			android:src="@drawable/icon"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"></ImageView>
		<TextView
			android:text="TextView"
			android:id="@+id/textView1"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"></TextView>
	</LinearLayout>
</LinearLayout>

 识别文件类型并打开

 

private void openFile(File f) {
		Intent intent = new Intent();
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		intent.setAction(android.content.Intent.ACTION_VIEW);

		/* 调用getMIMEType()来取得MimeType */
		String type = getMIMEType(f);
		/* 设定intent的file与MimeType */
		intent.setDataAndType(Uri.fromFile(f), type);
		startActivity(intent);
	}

	/* 判断文件MimeType的method */
	private String getMIMEType(File f) {
		String type = "";
		String fName = f.getName();
		/* 取得扩展名 */
		String end = fName
				.substring(fName.lastIndexOf(".") + 1, fName.length())
				.toLowerCase();

		/* 依扩展名的类型决定MimeType */
		if (end.equals("m4a") || end.equals("mp3") || end.equals("mid")
				|| end.equals("xmf") || end.equals("ogg") || end.equals("wav")) {
			type = "audio";
		} else if (end.equals("3gp") || end.equals("mp4")) {
			type = "video";
		} else if (end.equals("jpg") || end.equals("gif") || end.equals("png")
				|| end.equals("jpeg") || end.equals("bmp")) {
			type = "image";
		} else {
			type = "*";
		}
		/* 如果无法直接打开，就弹出软件列表给用户选择 */
		type += "/*";
		return type;
	}

 

重命名文件

 

file.renameTo(new File(newPath));

 删除文件

 

file.delete();