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：

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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

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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

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<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"><LinearLayoutandroid:layout_width="fill_parent"android:id="@+id/linearLayout1"android:layout_height="wrap_content"><ImageViewandroid:id="@+id/imageView1"android:src="@drawable/icon"android:layout_width="wrap_content"android:layout_height="wrap_content"></ImageView><TextViewandroid: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

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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

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file.renameTo(new File(newPath));

?删除文件

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file.delete();

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