package com.auto.lyric.widgets;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.util.AttributeSet;
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import android.util.Log;
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import com.auto.lyric.data.LyricObject;
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import com.auto.lyric.data.LyricServer;
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import com.auto.lyric.util.DeviceUtil;
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/**
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* 歌词
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* Created by Runt (qingingrunt2010@qq.com) on 2022/4/30.
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*/
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public class LyricView extends androidx.appcompat.widget.AppCompatTextView {
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private float mX; //屏幕X轴的中点，此值固定，保持歌词在X中间显示
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private float offsetY; //歌词在Y轴上的偏移量，此值会根据歌词的滚动变小
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private int lrcIndex=0; //保存歌词TreeMap的下标
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private int SIZEWORD=0;//显示歌词文字的大小值
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private int INTERVAL=45;//歌词每行的间隔
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Paint paint=new Paint();//画笔，用于画不是高亮的歌词
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Paint paintHL=new Paint(); //画笔，用于画高亮的歌词，即当前唱到这句歌词
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public LyricView(Context context){
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super(context);
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init();
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}
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public LyricView(Context context, AttributeSet attrs) {
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super(context, attrs);
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init();
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}
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/* (non-Javadoc)
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* @see android.view.View#onDraw(android.graphics.Canvas)
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*/
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@Override
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protected void onDraw(Canvas canvas) {
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if(LyricServer.getLrc_map().size() > 0){
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paintHL.setTextSize(SIZEWORD);
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paint.setTextSize(SIZEWORD);
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LyricObject temp= LyricServer.getLrc_map().get(lrcIndex);
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canvas.drawText(temp.lrc, mX, offsetY+(SIZEWORD+INTERVAL)*lrcIndex, paintHL);
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// 画当前歌词之前的歌词
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for(int i=lrcIndex-1;i>=0;i--){
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temp=LyricServer.getLrc_map().get(i);
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if(offsetY+(SIZEWORD+INTERVAL)*i<0){
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break;
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}
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canvas.drawText(temp.lrc, mX, offsetY+(SIZEWORD+INTERVAL)*i, paint);
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}
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// 画当前歌词之后的歌词
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for(int i=lrcIndex+1;i<LyricServer.getLrc_map().size();i++){
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temp=LyricServer.getLrc_map().get(i);
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if(offsetY+(SIZEWORD+INTERVAL)*i>600){
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break;
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}
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canvas.drawText(temp.lrc, mX, offsetY+(SIZEWORD+INTERVAL)*i, paint);
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}
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}
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else{
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paint.setTextSize(25);
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canvas.drawText("找不到歌词", mX, 310, paint);
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}
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super.onDraw(canvas);
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}
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public void init(){
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offsetY=320;
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paint=new Paint();
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paint.setTextAlign(Paint.Align.CENTER);
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paint.setColor(Color.GREEN);
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paint.setAntiAlias(true);
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paint.setDither(true);
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paint.setAlpha(180);
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paintHL=new Paint();
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paintHL.setTextAlign(Paint.Align.CENTER);
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paintHL.setColor(Color.RED);
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paintHL.setAntiAlias(true);
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paintHL.setAlpha(255);
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}
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/**
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* 根据歌词里面最长的那句来确定歌词字体的大小
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*/
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public void setTextSize(){
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if(LyricServer.getLrc_map().size() == 0){
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return;
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}
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int max=LyricServer.getLrc_map().get(0).lrc.length();
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for(int i=1;i<LyricServer.getLrc_map().size();i++){
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LyricObject lrcStrLength=LyricServer.getLrc_map().get(i);
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if(max<lrcStrLength.lrc.length()){
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max=lrcStrLength.lrc.length();
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}
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}
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SIZEWORD = DeviceUtil.convertDpToPixel(320/max,getContext());
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}
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protected void onSizeChanged(int w, int h, int oldw, int oldh) {
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mX = w * 0.5f;
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super.onSizeChanged(w, h, oldw, oldh);
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}
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/**
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* 歌词滚动的速度
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*
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* @return 返回歌词滚动的速度
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*/
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public Float SpeedLrc(){
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float speed=0;
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if(offsetY+(SIZEWORD+INTERVAL)*lrcIndex>220){
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speed=((offsetY+(SIZEWORD+INTERVAL)*lrcIndex-220)/20);
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} else if(offsetY+(SIZEWORD+INTERVAL)*lrcIndex < 120){
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Log.i("speed", "speed is too fast!!!");
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speed = 0;
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}
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// if(speed<0.2){
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// speed=0.2f;
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// }
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return speed;
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}
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/**
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* 按当前的歌曲的播放时间，从歌词里面获得那一句
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* @param time 当前歌曲的播放时间
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* @return 返回当前歌词的索引值
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*/
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public int getIndex(int time){
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int index=0;
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for(int i=0;i<LyricServer.getLrc_map().size();i++){
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LyricObject temp=LyricServer.getLrc_map().get(i);
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if(temp.begintime<time){
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++index;
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}
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}
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lrcIndex = index-1;
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if(lrcIndex<0){
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lrcIndex=0;
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}
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return lrcIndex;
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}
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public void setIndex(int lrcIndex) {
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this.lrcIndex = lrcIndex;
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}
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/**
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* @return the offsetY
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*/
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public float getOffsetY() {
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return offsetY;
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}
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/**
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* @param offsetY the offsetY to set
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*/
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public void setOffsetY(float offsetY) {
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this.offsetY = offsetY;
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}
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/**
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* @return 返回歌词文字的大小
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*/
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public int getSIZEWORD() {
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return SIZEWORD;
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}
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/**
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* 设置歌词文字的大小
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* @param sIZEWORD the sIZEWORD to set
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*/
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public void setSIZEWORD(int sIZEWORD) {
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SIZEWORD = sIZEWORD;
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}
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public int getIndexFromOffsetY(float offsetY){
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//220 - index * (binding.lyric.getSIZEWORD() + 44)
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int index = (int) ((220 - offsetY) / (SIZEWORD + 44));
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Log.i("LyricView", "getIndexFromOffsetY index:"+index);
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if(index < 0){
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return 0;
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}else if(LyricServer.getLrc_map().keySet().size()>index){
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return index;
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}else {
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return LyricServer.getLrc_map().keySet().size() -1;
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}
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}
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}
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