最新项目中需要用到，就研究了以下。废话不多说，直接上代码
public class HorizontalBarView extends View {
private ArrayList<HoBarEntity> hoBarEntityList = new ArrayList<>();
private float barStartX = 0f;//
private Paint mContentPaint;
private Paint mbarPaint;
private Paint mCountPaint;
private Paint mLinePaint;
private float barHeight = dp2px(15); //bar的高度
private float barInterval = dp2px(15);//bar之间的距离
private int mContentPaintColor = Color.parseColor("#9e9e9e"); //最左边文字的颜色
private int mbarPaintColor = Color.parseColor("#0EBF93");//bar的颜色
private int mCountPaintColor = Color.parseColor("#5e5e5e");//最右边文字的颜色
private int mLinePaintColor = Color.parseColor("#ededed");//线的颜色
private int contentTextSize = 30;//最左边文字的大小
private int countTextSize = 30;//最右边文字的大小
private int viewIntervar = 10;//view的距离
private float topAndBottomInterval = dp2px(10);//上下边距的距离（上下线与bar的距离）
private float rightInterval = dp2px(10);//最右侧文字和右边距离
private int defaltHeight = 0;
private int textMaxWidth = 0;
private int maxCount = 0;
private float countMaxWidth = 0;
private float contentTextHeight = 0;
private float countTextHeight = 0;
private Rect rect;//柱状图矩形
private List<Rect> rectList =new ArrayList<>();
private OnItemClickListener listener;
//第一步 定义接口
public interface OnItemClickListener {
void onClick(int i,int num);
}
//第二步， 写一个公共的方法
public void setOnItemClickListener(OnItemClickListener listener) {
this.listener = listener;
}
public HorizontalBarView(Context context) {
this(context, null);
}
public HorizontalBarView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public HorizontalBarView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initPaints();
}
public float getBarHeight() {
return barHeight;
}
public float getBarInterval() {
return barInterval;
}
public int getmContentPaintColor() {
return mContentPaintColor;
}
public int getMbarPaintColor() {
return mbarPaintColor;
}
public int getmCountPaintColor() {
return mCountPaintColor;
}
public int getmLinePaintColor() {
return mLinePaintColor;
}
public int getContentTextSize() {
return contentTextSize;
}
public int getCountTextSize() {
return countTextSize;
}
public int getViewIntervar() {
return viewIntervar;
}
public float getTopAndBottomInterval() {
return topAndBottomInterval;
}
public int dp2px(float dpValue) {
final float scale = getContext().getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
private void initPaints() {
mContentPaint = new Paint();
mContentPaint.setAntiAlias(true);
mContentPaint.setStyle(Paint.Style.FILL);
mContentPaint.setColor(mContentPaintColor);
mContentPaint.setTextSize(contentTextSize);
mContentPaint.setTextAlign(Paint.Align.RIGHT);
mContentPaint.setStrokeCap(Paint.Cap.ROUND);
mbarPaint = new Paint();
mbarPaint.setAntiAlias(true);
mbarPaint.setStyle(Paint.Style.FILL);
mbarPaint.setColor(mbarPaintColor);
mbarPaint.setStrokeCap(Paint.Cap.ROUND);
mCountPaint = new Paint();
mCountPaint.setAntiAlias(true);
mCountPaint.setStyle(Paint.Style.FILL);
mCountPaint.setTextSize(countTextSize);
mCountPaint.setColor(mCountPaintColor);
mCountPaint.setStrokeCap(Paint.Cap.ROUND);
mLinePaint = new Paint();
mLinePaint.setAntiAlias(true);
mLinePaint.setStyle(Paint.Style.FILL);
mLinePaint.setTextSize(countTextSize);
mLinePaint.setColor(mLinePaintColor);
mLinePaint.setStrokeCap(Paint.Cap.ROUND);
mLinePaint.setStrokeWidth(dp2px(0.8f));
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
int width = 0;
int height = 0;
if (widthMode == MeasureSpec.EXACTLY) {
width = widthSize;
} else {
width = getScreenWidth();
}
if (heightMode == MeasureSpec.EXACTLY) {
height = heightSize;
} else {
//计算高度
computeHeightAndTextMaxWidth();
height = defaltHeight;
}
setMeasuredDimension(width, height);
}
//计算高度
private void computeHeightAndTextMaxWidth() {
if (hoBarEntityList.size() == 0) {
defaltHeight = getPaddingTop() + getPaddingBottom();
} else {
defaltHeight = (int) ((int) (getPaddingTop() + getPaddingBottom() + barHeight * hoBarEntityList.size() + (hoBarEntityList.size() - 1) * barInterval) + 2 * topAndBottomInterval);
for (int i = 0; i < hoBarEntityList.size(); i++) {
float tempWidth = mContentPaint.measureText(hoBarEntityList.get(i).content);
if (tempWidth > textMaxWidth) {
textMaxWidth = (int) tempWidth;
}
//获取文字高度
if (contentTextHeight <= 0) {
Rect rect = new Rect();
mContentPaint.getTextBounds(hoBarEntityList.get(i).content, 0, hoBarEntityList.get(i).content.length(), rect);
contentTextHeight = rect.width();
}
if (countTextHeight <= 0) {
Rect rect = new Rect();
mCountPaint.getTextBounds(hoBarEntityList.get(i).count + "", 0, (hoBarEntityList.get(i).count + "").length(), rect);
countTextHeight = rect.width();
}
if (hoBarEntityList.get(i).count > maxCount) {
maxCount = hoBarEntityList.get(i).count;
}
}
countMaxWidth = mCountPaint.measureText(maxCount + "");
barStartX = getPaddingLeft() + textMaxWidth + viewIntervar;
Log.e("TAG", "textMaxWidth===" + textMaxWidth + " countMaxWidth===" + countMaxWidth);
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//计算最长的bar的长度
float maxBarWidth = getMeasuredWidth() - getPaddingRight() - barStartX - countMaxWidth - 2 * viewIntervar - rightInterval;
float perBarWidth = 0;
if (maxCount > 0) {
perBarWidth = maxBarWidth / maxCount;
}
//绘制bar
float barStartY = getPaddingTop() + topAndBottomInterval;
float barEndX = 0;
float barEndY = 0;
//绘制content
float contentTextStart = barStartX - viewIntervar;
//绘制上边的线
canvas.drawLine(barStartX, getPaddingTop(), getMeasuredWidth() - getPaddingRight(), getPaddingTop(), mLinePaint);
//绘制下边的线
canvas.drawLine(barStartX, getMeasuredHeight() - getPaddingBottom(), getMeasuredWidth() - getPaddingRight(), getMeasuredHeight() - getPaddingBottom(), mLinePaint);
//绘制左边的线
canvas.drawLine(barStartX, getPaddingTop(), barStartX, getMeasuredHeight() - getPaddingBottom(), mLinePaint);
rectList.clear();
for (int i = 0; i < hoBarEntityList.size(); i++) {
barEndX = barStartX + perBarWidth * hoBarEntityList.get(i).count;
barEndY = barStartY + barHeight;
Log.e("TAG", "barStartX-barEndX===" + (barStartX - barEndX));
//绘制bar
canvas.drawRect(barStartX, barStartY, barEndX, barEndY, mbarPaint);
rect = new Rect((int)barStartX, (int)barStartY,(int) barEndX, (int)barEndY);
rectList.add(rect);
//绘制content
//计算基线
Paint.FontMetricsInt contentfontMetrics = mContentPaint.getFontMetricsInt();
float contentBaseLine = barStartY + barHeight / 2 + -(contentfontMetrics.bottom - contentfontMetrics.top) / 2 - contentfontMetrics.top;
canvas.drawText(hoBarEntityList.get(i).content, contentTextStart, contentBaseLine, mContentPaint);
//绘制count
Paint.FontMetricsInt fontMetrics = mCountPaint.getFontMetricsInt();
float countBaseLine = barStartY + barHeight / 2 + -(fontMetrics.bottom - fontMetrics.top) / 2 - fontMetrics.top;
canvas.drawText(hoBarEntityList.get(i).count + "人", barEndX + viewIntervar * 2, countBaseLine, mCountPaint);
barStartY = barEndY + barInterval;
//
}
}
/**
* 柱状图touch事件
* 获取触摸位置计算属于哪个月份的
* @param ev
* @return
*/
@Override
public boolean onTouchEvent(MotionEvent ev) {
int x = (int) ev.getX();
int y = (int) ev.getY();
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
for (int i = 0; i < hoBarEntityList.size(); i++) {
if(rectList.get(i).contains(x,y)) {
listener.onClick(i,hoBarEntityList.get(i).count);
}
}
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
private int getScreenWidth() {
WindowManager wm = (WindowManager) getContext()
.getSystemService(Context.WINDOW_SERVICE);
return wm.getDefaultDisplay().getWidth();
}
private int getScreenheight() {
WindowManager wm = (WindowManager) getContext()
.getSystemService(Context.WINDOW_SERVICE);
return wm.getDefaultDisplay().getHeight();
}
public void setHoBarData(ArrayList<HoBarEntity> list) {
hoBarEntityList.clear();
hoBarEntityList.addAll(list);
requestLayout();
invalidate();
}
public static class HoBarEntity {
public String content;
public int count;
}
}
具体使用：
ArrayList<HorizontalBarView.HoBarEntity> hoBarEntities = new ArrayList<>();
for(int i = 0;i<zhenzhilist.size();i++){
HorizontalBarView.HoBarEntity hoBarEntity = new HorizontalBarView.HoBarEntity();
hoBarEntity.content = zhenzhilist.get(i).getFiletype();
hoBarEntity.count = Integer.parseInt(zhenzhilist.get(i).getFilename());
hoBarEntities.add(hoBarEntity);
}
mbingding.zhenzhihorizontalbarviewr.setHoBarData(hoBarEntities);