前言
關鍵字:vitamio、vplayer、android播放器、android影音、android開源播放器
本章節把android萬能播放器本地播放的主要功能(緩存播放清單和a-z快速查詢功能)完成,和播放元件關系不大,但用到一些實用的技術,歡迎交流!
聲明
歡迎轉載,但請保留文章原始出處:)
部落格園:http://www.cnblogs.com
農民伯伯: http://over140.cnblogs.com
系列
正文
一、目标
1.1 a-z快速切換查找影片
把手機上的聯系人上的a-z快速查找運用到了這裡,查找檔案更便捷。這也是"學"的米聊的 :)
1.2 緩存掃描視訊清單
首次使用掃描sd卡一遍,以後就從資料庫讀取了,下篇文章再加一個監聽即可。
1.3 截圖
![](https://img.laitimes.com/img/__Qf2AjLwojIjJCLyojI0JCLicmbw5SMfhTL20iMxAjMvwlNvwlMxAjMvwFM0EjclZ3bvwVbvN2Xzd2bsJmbj9CXt92YuM3ZvxmYuNmLzV2Zh1Wavw1LcpDc0RHaiojIsJye.png)
二、實作
核心代碼:
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);
// ~~~~~~~~~ 綁定控件
first_letter_overlay = (textview) v.findviewbyid(r.id.first_letter_overlay);
alphabet_scroller = (imageview) v.findviewbyid(r.id.alphabet_scroller);
// ~~~~~~~~~ 綁定事件
alphabet_scroller.setclickable(true);
alphabet_scroller.setontouchlistener(asontouch);
mlistview.setonitemclicklistener(this);
// ~~~~~~~~~ 加載資料
if (new sqlitehelper(getactivity()).isempty())
new scanvideotask().execute();
else
new datatask().execute();
return v;
}
/** 單擊啟動播放 */
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);
}
protected arraylist<pfile> doinbackground(void... params) {
return filebusiness.getallsortfiles(getactivity());
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);
/** 掃描sd卡 */
private class scanvideotask extends asynctask<void, file, arraylist<pfile>> {
private progressdialog pd;
private arraylist<file> files = new arraylist<file>();
pd = new progressdialog(getactivity());
pd.setmessage("正在掃描視訊檔案...");
pd.show();
// ~~~ 周遊檔案夾
eachallmedias(environment.getexternalstoragedirectory());
// ~~~ 入庫
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) {
} finally {
db.endtransaction();
db.close();
}
// ~~~ 查詢資料
protected void onprogressupdate(final file... values) {
file f = values[0];
files.add(f);
pd.setmessage(f.getname());
/** 周遊所有檔案夾,查找出視訊檔案 */
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);
}
}
madapter = new fileadapter(getactivity(), result);
pd.dismiss();
private class fileadapter extends arrayadapter<pfile> {
public fileadapter(context ctx, arraylist<pfile> l) {
super(ctx, l);
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() {
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);
case motionevent.action_move:
return false;
};
* 顯示字元
*
* @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++;
}
代碼說明:
代碼是基于上篇文章,新增了播放清單緩存功能以及快速查找功能。
a). 使用了pinyin4j開源項目,用于提取檔案名中的漢字的拼音,以便能夠。
b). a-z這部分的代碼也是通過反編譯參考米聊的,比較有實用價值
c). 入庫部分使用了事務
其他代碼請參見項目代碼。
注意:由于是示例代碼,考慮不盡周全,可能在後續章節中補充,請大家注意不要直接使用代碼!例如應該檢查一下sd卡是否可用等問題。
三、項目下載下傳
四、vtamio與vplayer
結束
這周釋出新的版本稍忙,拖到周五才寫這篇文章,總算沒有食言 :) 功能越做越細,也會盡量往一個正式的産品方向靠,盡可能的提供有用的代碼。
轉載:http://www.cnblogs.com/over140/archive/2012/06/08/2541452.html