Android 使用Vitamio打造自己的万能播放器（4）――本地播放（快捷搜索、数据存储）

public class FragmentFile extends FragmentBase implements OnItemClickListener { private FileAdapter mAdapter; private TextView first_letter_overlay; private ImageView alphabet_scroller; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = super.onCreateView(inflater, container, savedInstanceState); // ~~~~~~~~~ 绑定控件 first_letter_overlay = (TextView) v.findViewById(R.id.first_letter_overlay); alphabet_scroller = (ImageView) v.findViewById(R.id.alphabet_scroller); // ~~~~~~~~~ 绑定事件 alphabet_scroller.setClickable(true); alphabet_scroller.setOnTouchListener(asOnTouch); mListView.setOnItemClickListener(this); // ~~~~~~~~~ 加载数据 if (new SQLiteHelper(getActivity()).isEmpty()) new ScanVideoTask().execute(); else new DataTask().execute(); return v; } /** 单击启动播放 */ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { final PFile f = mAdapter.getItem(position); Intent intent = new Intent(getActivity(), VideoViewDemo.class); intent.putExtra("path", f.path); startActivity(intent); } private class DataTask extends AsyncTask<Void, Void, ArrayList<PFile>> { @Override protected void onPreExecute() { super.onPreExecute(); mLoadingLayout.setVisibility(View.VISIBLE); mListView.setVisibility(View.GONE); } @Override protected ArrayList<PFile> doInBackground(Void... params) { return FileBusiness.getAllSortFiles(getActivity()); } @Override protected void onPostExecute(ArrayList<PFile> result) { super.onPostExecute(result); mAdapter = new FileAdapter(getActivity(), FileBusiness.getAllSortFiles(getActivity())); mListView.setAdapter(mAdapter); mLoadingLayout.setVisibility(View.GONE); mListView.setVisibility(View.VISIBLE); } } /** 扫描SD卡 */ private class ScanVideoTask extends AsyncTask<Void, File, ArrayList<PFile>> { private ProgressDialog pd; private ArrayList<File> files = new ArrayList<File>(); @Override protected void onPreExecute() { super.onPreExecute(); pd = new ProgressDialog(getActivity()); pd.setMessage("正在扫描视频文件..."); pd.show(); } @Override protected ArrayList<PFile> doInBackground(Void... params) { // ~~~ 遍历文件夹 eachAllMedias(Environment.getExternalStorageDirectory()); // ~~~ 入库 SQLiteHelper sqlite = new SQLiteHelper(getActivity()); SQLiteDatabase db = sqlite.getWritableDatabase(); try { db.beginTransaction(); SQLiteStatement stat = db.compileStatement("INSERT INTO files(" + FilesColumns.COL_TITLE + "," + FilesColumns.COL_TITLE_PINYIN + "," + FilesColumns.COL_PATH + "," + FilesColumns.COL_LAST_ACCESS_TIME + ") VALUES(?,?,?,?)"); for (File f : files) { String name = FileUtils.getFileNameNoEx(f.getName()); int index = 1; stat.bindString(index++, name);//title stat.bindString(index++, PinyinUtils.chineneToSpell(name));//title_pinyin stat.bindString(index++, f.getPath());//path stat.bindLong(index++, System.currentTimeMillis());//last_access_time stat.execute(); } db.setTransactionSuccessful(); } catch (BadHanyuPinyinOutputFormatCombination e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { db.endTransaction(); db.close(); } // ~~~ 查询数据 return FileBusiness.getAllSortFiles(getActivity()); } @Override protected void onProgressUpdate(final File... values) { File f = values[0]; files.add(f); pd.setMessage(f.getName()); } /** 遍历所有文件夹，查找出视频文件 */ public void eachAllMedias(File f) { if (f != null && f.exists() && f.isDirectory()) { File[] files = f.listFiles(); if (files != null) { for (File file : f.listFiles()) { if (file.isDirectory()) { eachAllMedias(file); } else if (file.exists() && file.canRead() && FileUtils.isVideoOrAudio(file)) { publishProgress(file); } } } } } @Override protected void onPostExecute(ArrayList<PFile> result) { super.onPostExecute(result); mAdapter = new FileAdapter(getActivity(), result); mListView.setAdapter(mAdapter); pd.dismiss(); } } private class FileAdapter extends ArrayAdapter<PFile> { public FileAdapter(Context ctx, ArrayList<PFile> l) { super(ctx, l); } @Override public View getView(int position, View convertView, ViewGroup parent) { final PFile f = getItem(position); if (convertView == null) { final LayoutInflater mInflater = getActivity().getLayoutInflater(); convertView = mInflater.inflate(R.layout.fragment_file_item, null); } ((TextView) convertView.findViewById(R.id.title)).setText(f.title); return convertView; } } /** * A-Z */ private OnTouchListener asOnTouch = new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN:// 0 alphabet_scroller.setPressed(true); first_letter_overlay.setVisibility(View.VISIBLE); mathScrollerPosition(event.getY()); break; case MotionEvent.ACTION_UP:// 1 alphabet_scroller.setPressed(false); first_letter_overlay.setVisibility(View.GONE); break; case MotionEvent.ACTION_MOVE: mathScrollerPosition(event.getY()); break; } return false; } }; /** * 显示字符 *  * @param y */ private void mathScrollerPosition(float y) { int height = alphabet_scroller.getHeight(); float charHeight = height / 28.0f; char c = 'A'; if (y < 0) y = 0; else if (y > height) y = height; int index = (int) (y / charHeight) - 1; if (index < 0) index = 0; else if (index > 25) index = 25; String key = String.valueOf((char) (c + index)); first_letter_overlay.setText(key); int position = 0; if (index == 0) mListView.setSelection(0); else if (index == 25) mListView.setSelection(mAdapter.getCount() - 1); else { for (PFile item : mAdapter.getAll()) { if (item.title_pinyin.startsWith(key)) { mListView.setSelection(position); break; } position++; } } }