问题描述
但我想在每条线之间留出更大的间隙，我希望它像下图那样的 SoundCloud 波。
这是我的代码：
public class AudioWaveSeekBar extends View {
private static Paint paintInner;
private static Paint paintOuter;
private int width;
private int height;
private float startX;
private int thumbX = 0;
private View parentView;
private Context context;
private int thumbDX = 0;
private byte[] waveformBytes;
private boolean pressed = false;
private boolean startDragging = false;
private SeekBarchangelistener seekBarchangelistener;
private int innerColor = 0xffafbcd7;
private int outerColor = 0xff3b5998;
private int pressedColor = 0xffa7b8dc;
private int duration;
public AudioWaveSeekBar(Context context) {
this(context,null);
}
public AudioWaveSeekBar(Context context,AttributeSet attrs) {
this(context,attrs,0);
}
public AudioWaveSeekBar(Context context,AttributeSet attrs,int defStyleAttr) {
super(context,defStyleAttr);
this.context = context;
if (paintInner == null) {
paintInner = new Paint();
paintOuter = new Paint();
}
}
public static float dip2px(Context context,float dp) {
return dp * context.getResources().getdisplayMetrics().density;
}
public static float px2cm(Context context,float cm) {
return (cm / 2.54f) * context.getResources().getdisplayMetrics().density;
}
public void setonSeekBarchangelistener(SeekBarchangelistener seekBarDelegate) {
seekBarchangelistener = seekBarDelegate;
}
public void setColors(int inner,int outer,int selected) {
innerColor = inner;
outerColor = outer;
pressedColor = selected;
}
public void setWaveform(byte[] waveform) {
waveformBytes = waveform;
invalidate();
}
public void setProgress(float progress) {
if (duration != 0)
progress = progress / duration;
else
progress = 0;
thumbX = (int) Math.ceil(width * progress);
if (thumbX < 0) {
thumbX = 0;
} else if (thumbX > width) {
thumbX = width;
}
invalidate();
}
public void setParentView(View view) {
parentView = view;
}
public void setDuration(int duration) {
this.duration = duration;
}
public void setSize(int w,int h) {
width = w;
height = h;
invalidate();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
boolean result = onTouch(event.getAction(),event.getX(),event.getY());
if (result)
invalidate();
return result || super.onTouchEvent(event);
}
public boolean onTouch(int action,float x,float y) {
if (action == MotionEvent.ACTION_DOWN) {
if (0 <= x && x <= width && y >= 0 && y <= height) {
startX = x;
pressed = true;
thumbDX = (int) (x - thumbX);
startDragging = false;
return true;
}
} else if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) {
if (pressed) {
if (action == MotionEvent.ACTION_UP && seekBarchangelistener != null) {
seekBarchangelistener.OnSeekBarchangelistener((int) (((float) thumbX / (float) width) * duration));
}
pressed = false;
return true;
}
} else if (action == MotionEvent.ACTION_MOVE) {
if (pressed) {
if (startDragging) {
thumbX = (int) (x - thumbDX);
if (thumbX < 0) {
thumbX = 0;
} else if (thumbX > width) {
thumbX = width;
}
}
if (startX != -1 && Math.abs(x - startX) > px2cm(context,0.2f)) {
if (parentView != null && parentView.getParent() != null) {
parentView.getParent().requestdisallowInterceptTouchEvent(true);
}
startDragging = true;
startX = -1;
}
return true;
}
}
return false;
}
@Override
protected void onLayout(boolean changed,int left,int top,int right,int bottom) {
super.onLayout(changed,left,top,right,bottom);
setSize(right - left,bottom - top);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (waveformBytes == null || width == 0) {
return;
}
float totalBarsCount = width / dip2px(context,3);
if (totalBarsCount <= 0.1f)
return;
int max = waveformBytes[0];
int min = waveformBytes[0];
for (int i = 1; i < waveformBytes.length; i++) {
if (waveformBytes[i] > max) max = waveformBytes[i];
if (waveformBytes[i] < min) min = waveformBytes[i];
}
int samplesCount = waveformBytes.length;
float samplesPerBar = samplesCount / totalBarsCount;
float barCounter = 0;
int nextBarNum = 0;
paintInner.setColor(pressed ? pressedColor : innerColor);
paintOuter.setColor(outerColor);
int barNum = 0;
int lastBarNum;
int drawBarCount;
for (int a = 0; a < samplesCount; a++) {
if (a != nextBarNum) {
continue;
}
drawBarCount = 0;
lastBarNum = nextBarNum;
while (lastBarNum == nextBarNum) {
barCounter += samplesPerBar;
nextBarNum = (int) barCounter;
drawBarCount++;
}
int value = (waveformBytes[a] - min) % (max + 1);
for (int b = 0; b < drawBarCount; b++) {
float x = barNum * dip2px(context,4);
if (x < thumbX && x + dip2px(context,3) < thumbX) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
canvas.drawRoundRect(x,height - Math.max(dip2px(context,3),height * value / max),x + dip2px(context,height,50,paintOuter);
else
canvas.drawRect(x,paintOuter);
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
canvas.drawRoundRect(x,paintInner);
else
canvas.drawRect(x,paintInner);
if (x < thumbX) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
canvas.drawRoundRect(x,thumbX,paintOuter);
else
canvas.drawRect(x,paintOuter);
}
}
barNum++;
}
}
}
public interface SeekBarchangelistener {
void OnSeekBarchangelistener(int progress);
}
}
解决方法
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