视频显示字幕（解析srt文件）

1.定义一个实体类

用于解析srt文件的内容

public class SRT {  
private int beginTime;  
private int endTime;  
private String srtBody;
   
public int getBeginTime() {  
return beginTime;  
}  
   
public void setBeginTime(int beginTime) {  
this.beginTime = beginTime;  
}  
   
public int getEndTime() {  
return endTime;  
}  
   
public void setEndTime(int endTime) {  
this.endTime = endTime;  
}  
   
public String getSrtBody() {
return srtBody;  
}  
   
public void setSrtBody(String srtBody) {
this.srtBody = srtBody;  
}  
   
@Override
public String toString() {
return "" + beginTime + ":" + endTime + ":" + srtBody;  
}  
}

2.定义一个方法解析srt文件，并存放在集合中

public class SrtParser {
    public static int lastEndTime;
    private static ArrayList<SRT> enSrtList;
    private static String content;

    /**
     * 解析SRT字幕文件
     * 字幕路径
     */
    public static void parseSrt(String name, ArrayList<SRT> srtList) {
        InputStream inputStream = null;
        try {
            inputStream = new FileInputStream(name);
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    inputStream, "UTF-8"));
            String line = null;
            StringBuffer sb = new StringBuffer();
            while ((line = br.readLine()) != null) {
                if (!line.equals("")) {
                    sb.append(line).append("@");
                    continue;
                }

                String[] parseStrs = sb.toString().split("@");
                // 该if为了适应一开始就有空行以及其他不符格式的空行情况
                if (parseStrs.length < 3) {
                    sb.delete(0, sb.length());// 清空，否则影响下一个字幕元素的解析</i>
                    continue;
                }

                SRT srt = new SRT();
                // 解析开始和结束时间
                String timeTotime = parseStrs[1];
                int begin_hour = Integer.parseInt(timeTotime.substring(0, 2));
                int begin_mintue = Integer.parseInt(timeTotime.substring(3, 5));
                int begin_scend = Integer.parseInt(timeTotime.substring(6, 8));
                int beginTime = (begin_hour * 3600 + begin_mintue * 60 + begin_scend)
                        * 1000;
                int end_hour = Integer.parseInt(timeTotime.substring(14, 16));
                int end_mintue = Integer.parseInt(timeTotime.substring(17, 19));
                int end_scend = Integer.parseInt(timeTotime.substring(20, 22));
                int endTime = (end_hour * 3600 + end_mintue * 60 + end_scend)
                        * 1000;

                //解析字幕文字
                String srtBody = "";
                // 可能1句字幕，也可能2句及以上。
                for (int i = 2; i < parseStrs.length; i++) {
                    srtBody += parseStrs[2] + "\n";
                }
                // 删除最后一个"\n"
                srtBody = srtBody.substring(0, srtBody.length() - 1);
                // 设置SRT
                srt.setBeginTime(beginTime);
                srt.setEndTime(endTime);
                srt.setSrtBody(srtBody);
                srtList.add(srt);
                sb.delete(0, sb.length());// 清空，否则影响下一个字幕元素的解析
            }
            lastEndTime = srtList.get(srtList.size() - 1).getEndTime();
            br.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

//显示字幕（双语显示，如果只是单语显示，不要 if (isGB2312(srtBody)) 这个判断）
    public static void showSRT(GiraffePlayer videoView, TextView tvSrtCN, TextView tvSrtEN, String s, ArrayList<SRT> srtList, int size) {
        int currentPosition = videoView.getCurrentPosition();//vv是VideoView播放器
        if (currentPosition > lastEndTime) {
            tvSrtCN.setVisibility(View.GONE);
            tvSrtEN.setVisibility(View.GONE);
        }


        for (int i = 0; i < srtList.size(); i++) {
            SRT srtbean = srtList.get(i);
            if (currentPosition >= srtbean.getBeginTime()
                    && currentPosition <= srtbean.getEndTime()) {
                String srtBody = srtbean.getSrtBody();

                if (isGB2312(srtBody)) {
                    tvSrtCN.setVisibility(View.VISIBLE);
                    tvSrtCN.setText(srtBody);
                    Log.e("wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww", "中文");
                } else {
                    tvSrtEN.setVisibility(View.VISIBLE);
                    tvSrtEN.setText(srtBody);
                    Log.e("wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww", "英文");
                }


                //显示过的就删掉，提高查询效率
//                srtList.remove(i);
//                break;//找到后就没必要继续遍历下去，节约资源
            } else {
                if (i < srtList.size() - 2 && currentPosition > srtbean.getEndTime() && currentPosition < srtList.get(i + 1).getBeginTime()) {

                    tvSrtCN.setVisibility(View.GONE);
                    tvSrtEN.setVisibility(View.GONE);
                }
            }
        }


//        }
    }

    public static Boolean isGB2312(String str) {
        for (int i = 0; i < str.length(); i++) {
            String bb = str.substring(i, i + 1);
// 生成一个Pattern,同时编译一个正则表达式,其中的u4E00("一"的unicode编码)-\u9FA5("龥"的unicode编码)
            boolean cc = java.util.regex.Pattern.matches("[\u4E00-\u9FA5]", bb);
            if (cc == false) {
                return cc;
            }
        }
        return true;
    }

3.下载srt文件

根据服务器提供的地址，下载srt字幕文件，存储在本地，然后调用解析的方法，显示字幕，并且用Handler每个多少秒去遍历集合显示字幕

//下载的逻辑自己去处理
//本地存储的路径
   String name = Environment.getExternalStorageDirectory().getPath() + "/" + srt;
//解析srt文件
   SrtParser.parseSrt(name, srtList);
//发送Handler请求，每个5秒
   mHandler.sendEmptyMessageDelayed(0, 500);

    Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case PARSE_SRT_CN:
                    SrtParser.showSRT(mGiraffePlayer, cn_subtitleview, en_subtitleview, "cn", srtList, size);
                    //每隔500ms执行一次showSRT()
                    mHandler.sendEmptyMessageDelayed(0, 500);
            }

        }
    };