自定义控件 TextView 歌词 Lrc

演示

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

自定义View

/**
 * 歌词播放的自定义控件
 */
public class LrcView extends TextView {
    private String filePath = "/a.lrc";//文件路径
    private List<Lyrc> lyrcList;//歌词内容
    private int current = 0;//当前行
    private int lineSpacing = 70; //行间距
    //当前正在播放的行
    private Paint currentPaint;
    private int currentColor = Color.BLUE;//颜色
    private int currentSize = 55;//字体大小
    private Typeface currentTypeface = Typeface.DEFAULT_BOLD;//字体，默认的字体+粗体
    //其他行
    private Paint ortherPaint;
    private int ortherColor = Color.GREEN;
    private int ortherSize = 45;
    private Typeface ortherTypeface = Typeface.SERIF;//一种字体类型
    private Handler handler = new Handler() {
        public void handleMessage(Message msg) {
            invalidate();
        }
    };
    public LrcView(Context context) {
        this(context, null);
    }
    public LrcView(Context context, AttributeSet attrs) {
        super(context, attrs);
        lyrcList = LyrcUtil.readLRC(new File(Environment.getExternalStorageDirectory().getPath() + filePath));
        currentPaint = new Paint();
        currentPaint.setColor(currentColor);
        currentPaint.setTextSize(currentSize);
        currentPaint.setTextAlign(Align.CENTER);
        currentPaint.setTypeface(currentTypeface);
        ortherPaint = new Paint();
        ortherPaint.setColor(ortherColor);
        ortherPaint.setTextSize(ortherSize);
        ortherPaint.setTextAlign(Align.CENTER);
        ortherPaint.setTypeface(ortherTypeface);
    }
    public void setLrcType(String filePath, int lineSpacing, int currentColor, int currentSize, int ortherColor, int ortherSize) {
        lyrcList = LyrcUtil.readLRC(new File(filePath));
        this.lineSpacing = lineSpacing;
        
        currentPaint.setColor(currentColor);
        currentPaint.setTextSize(currentSize);
        ortherPaint.setColor(ortherColor);
        ortherPaint.setTextSize(ortherSize);
    }
    @Override
    protected void onDraw(Canvas canvas) {
        if (current < lyrcList.size()) {
            if (lyrcList != null && lyrcList.size() > 0) {
                Lyrc lyrc = null;
                //画前面的内容
                for (int i = current - 1; i >= 0; i--) {
                    lyrc = lyrcList.get(i);
                    canvas.drawText(lyrc.lrcString, getWidth() / 2, getHeight() / 2 + lineSpacing * (i - current), ortherPaint);
                }
                //画当前的内容
                lyrc = lyrcList.get(current);
                canvas.drawText(lyrc.lrcString, getWidth() / 2, getHeight() / 2, currentPaint);
                //画后面的内容
                for (int i = current + 1; i < lyrcList.size(); i++) {
                    lyrc = lyrcList.get(i);
                    canvas.drawText(lyrc.lrcString, getWidth() / 2, getHeight() / 2 + lineSpacing * (i - current), ortherPaint);
                }
                //告诉handler当前行的时间
                lyrc = lyrcList.get(current);
                handler.sendEmptyMessageDelayed(10, lyrc.sleepTime);
                //当前行+1
                current++;
            } else canvas.drawText("未找到歌词", getWidth() / 2, getHeight() / 2, currentPaint);
        }
        super.onDraw(canvas);
    }
}

工具类

public class LyrcUtil {
    private static List<Lyrc> lyrcList;
    /**
     * 读取文件
     */
    public static List<Lyrc> readLRC(File f) {
        try {
            if (f == null || !f.exists()) {
                lyrcList = null;
            } else {
                lyrcList = new Vector<Lyrc>();
                InputStream is = new BufferedInputStream(new FileInputStream(f));
                BufferedReader br = new BufferedReader(new InputStreamReader(is, getCharset(f)));
                String strTemp = "";
                while ((strTemp = br.readLine()) != null) {
                    strTemp = analyzeLRC(strTemp);
                }
                br.close();
                is.close();
                // 对歌词进行排序
                Collections.sort(lyrcList, new Sort());
                // 计算每行歌词的停留时间
                for (int i = 0; i < lyrcList.size(); i++) {
                    Lyrc one = lyrcList.get(i);
                    if (i + 1 < lyrcList.size()) {
                        Lyrc two = lyrcList.get(i + 1);
                        one.sleepTime = two.timePoint - one.timePoint;
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return lyrcList;
    }
    /**
     * 处理一行内容
     */
    private static String analyzeLRC(String text) {
        try {
            int pos1 = text.indexOf("[");
            int pos2 = text.indexOf("]");
            if (pos1 >= 0 && pos2 != -1) {
                Long time[] = new Long[getPossiblyTagCount(text)];
                time[0] = timeToLong(text.substring(pos1 + 1, pos2));
                if (time[0] == -1) return "";
                String strLineRemaining = text;
                int i = 1;
                while (pos1 >= 0 && pos2 != -1) {
                    strLineRemaining = strLineRemaining.substring(pos2 + 1);
                    pos1 = strLineRemaining.indexOf("[");
                    pos2 = strLineRemaining.indexOf("]");
                    if (pos2 != -1) {
                        time[i] = timeToLong(strLineRemaining.substring(pos1 + 1, pos2));
                        if (time[i] == -1) return ""; // LRCText
                        i++;
                    }
                }
                Lyrc tl = null;
                for (int j = 0; j < time.length; j++) {
                    if (time[j] != null) {
                        tl = new Lyrc();
                        tl.timePoint = time[j].intValue();
                        tl.lrcString = strLineRemaining;
                        lyrcList.add(tl);
                    }
                }
                return strLineRemaining;
            } else return "";
        } catch (Exception e) {
            return "";
        }
    }
    private static int getPossiblyTagCount(String Line) {
        String strCount1[] = Line.split("\[");
        String strCount2[] = Line.split("\]");
        if (strCount1.length == 0 && strCount2.length == 0) return 1;
        else if (strCount1.length > strCount2.length) return strCount1.length;
        else return strCount2.length;
    }
    /**
     * 时间转换
     */
    public static long timeToLong(String Time) {
        try {
            String[] s1 = Time.split(":");
            int min = Integer.parseInt(s1[0]);
            String[] s2 = s1[1].split("\.");
            int sec = Integer.parseInt(s2[0]);
            int mill = 0;
            if (s2.length > 1) mill = Integer.parseInt(s2[1]);
            return min * 60 * 1000 + sec * 1000 + mill * 10;
        } catch (Exception e) {
            return -1;
        }
    }
    /**
     * 判断文件编码
     */
    public static String getCharset(File file) {
        String charset = "GBK";
        byte[] first3Bytes = new byte[3];
        try {
            boolean checked = false;
            BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
            bis.mark(0);
            int read = bis.read(first3Bytes, 0, 3);
            if (read == -1) return charset;
            if (first3Bytes[0] == (byte) 0xFF && first3Bytes[1] == (byte) 0xFE) {
                charset = "UTF-16LE";
                checked = true;
            } else if (first3Bytes[0] == (byte) 0xFE && first3Bytes[1] == (byte) 0xFF) {
                charset = "UTF-16BE";
                checked = true;
            } else if (first3Bytes[0] == (byte) 0xEF && first3Bytes[1] == (byte) 0xBB && first3Bytes[2] == (byte) 0xBF) {
                charset = "UTF-8";
                checked = true;
            }
            bis.reset();
            if (!checked) {
                int loc = 0;
                while ((read = bis.read()) != -1) {
                    loc++;
                    if (read >= 0xF0) break;
                    if (0x80 <= read && read <= 0xBF) break;
                    if (0xC0 <= read && read <= 0xDF) {
                        read = bis.read();
                        if (0x80 <= read && read <= 0xBF) continue;
                        else break;
                    } else if (0xE0 <= read && read <= 0xEF) {
                        read = bis.read();
                        if (0x80 <= read && read <= 0xBF) {
                            read = bis.read();
                            if (0x80 <= read && read <= 0xBF) {
                                charset = "UTF-8";
                                break;
                            } else break;
                        } else break;
                    }
                }
            }
            bis.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return charset;
    }
    private static class Sort implements Comparator<Lyrc> {
        public Sort() {
        }
        public int compare(Lyrc tl1, Lyrc tl2) {
            return sortUp(tl1, tl2);
        }
        private int sortUp(Lyrc tl1, Lyrc tl2) {
            if (tl1.timePoint < tl2.timePoint) return -1;
            else if (tl1.timePoint > tl2.timePoint) return 1;
            else return 0;
        }
    }
}

bean

public class Lyrc {
    public String lrcString;
    public int sleepTime;
    public int timePoint;
}

a.lrc

[00:00] 护花使者
[00:03] 李克勤
[00:38][00:05] 这晚在街中偶遇心中的她
[00:41][00:09] 两脚决定不听叫唤跟她归家
[00:44][00:12] 深宵的冷风 不准吹去她
[00:47][00:15] 她那幽幽眼神快要对我说话
[00:50][00:18] 纤纤身影飘飘身影默默转来吧
[00:54][00:21] 对我说浪漫情人爱我吗
[00:57][00:24] 贪心的晚风 竟敢拥吻她
[01:00][00:27] 将她秀发温温柔柔每缕每缕放下
[01:03][00:30] 卑污的晚风 不应抚慰她
[01:06][00:33] 我已决意一生护着心中的她

使用

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LrcView lrcView = new LrcView(this);
        lrcView.setLrcType(Environment.getExternalStorageDirectory().getPath() +"/a.lrc", dp2px(25), 0xffff00ff, dp2px(20), 0xff0000ff, dp2px(16));
        setContentView(lrcView);
    }
    /** 
        * 根据手机的分辨率从 dp 的单位 转成为 px(像素) 
        */
    public int dp2px(float dpValue) {
        float scale = getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }
}

来自为知笔记(Wiz)