图表控件很多，这个多少能跟图表控件扯上边吧。
废话不多说，看图：
上面可以看到效果，支持各种自定义，支持点击
这里没有用到 自定义属性。有兴趣的可以自己设置下。直接看代码
注释非常清楚了。就不详细说明了。直接在在布局中使用。因为没有自定义属性，大家懂的。
这里添加点击事件，通常继承自view都有onClick和oLongClick事件的。这里加进去就好
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自定义view——实现半圆形进度条
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public class CircleBar extends View {
private static final String TAG = "CircleBar";
private RectF mColorWheelRectangle = new RectF();//圆圈的矩形范围
private Paint mDefaultWheelPaint;////绘制底部灰色圆圈的画笔
private Paint mColorWheelPaint;//绘制蓝色扇形的画笔
private Paint textPaint;//中间数值文字的画笔
private Paint textDesPaint;//描述文字的画笔
private float mColorWheelRadius;
private float circleStrokeWidth;//圆圈的线条粗细
private float pressExtraStrokeWidth;
private int mTextColor = getResources().getColor(R.color.blue);//默认文字颜色
private int mWheelColor = getResources().getColor(R.color.blue);//默认圆环颜色
private String mText;
private String mTextDes;//文字的描述
private int mTextDesSize;//描述文字的大小
private int mCount;//为了做动画
private float mSweepAnglePer;//扇形弧度百分比
private float mSweepAngle;//扇形弧度
private int mTextSize;//文字大小
private int mDistance;// 上下文字的距离
BarAnimation anim;//动画
private int TIME = 1000;//时间
public CircleBar(Context context) {
super(context);
init(null, 0);
}
public CircleBar(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs, 0);
}
public CircleBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(attrs, defStyle);
}
private void init(AttributeSet attrs, int defStyle) {
//初始化一些值
circleStrokeWidth = dip2px(getContext(), 10);
pressExtraStrokeWidth = dip2px(getContext(), 2);
mTextSize = dip2px(getContext(), 30);
mTextDesSize = dip2px(getContext(), 15);
mDistance = dip2px(getContext(), 30);//文字距离
//外圆环的画笔
mColorWheelPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mColorWheelPaint.setColor(mWheelColor);
mColorWheelPaint.setStyle(Style.STROKE);
mColorWheelPaint.setStrokeWidth(circleStrokeWidth);//圆圈的线条粗细
mColorWheelPaint.setStrokeCap(Paint.Cap.ROUND);//开启显示边缘为圆形
//默认圆的画笔
mDefaultWheelPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mDefaultWheelPaint.setColor(getResources().getColor(R.color.gray));
mDefaultWheelPaint.setStyle(Style.STROKE);
mDefaultWheelPaint.setStrokeWidth(circleStrokeWidth);//圆圈的线条粗细
mDefaultWheelPaint.setStrokeCap(Paint.Cap.ROUND);//开启显示边缘为圆形
//数值的画笔
textPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.LINEAR_TEXT_FLAG);
textPaint.setColor(mTextColor);
textPaint.setStyle(Style.FILL_AND_STROKE);
textPaint.setTextAlign(Align.LEFT);
textPaint.setTextSize(mTextSize);
//描述文字的画笔
textDesPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.LINEAR_TEXT_FLAG);
textDesPaint.setColor(getResources().getColor(R.color.gray));
textDesPaint.setStyle(Style.FILL_AND_STROKE);
textDesPaint.setTextSize(mTextDesSize);
textDesPaint.setTextAlign(Align.LEFT);
mText = "0";
mTextDes = "本次考试";
mSweepAngle = 0;
anim = new BarAnimation();
anim.setDuration(TIME);
}
protected void onDraw(Canvas canvas) {
canvas.drawArc(mColorWheelRectangle, -180, 180, false, mDefaultWheelPaint);//画外接的圆环
canvas.drawArc(mColorWheelRectangle, -180, mSweepAnglePer, false, mColorWheelPaint);//画圆环
Rect bounds = new Rect();
String textstr = mCount + "";
textPaint.getTextBounds(textstr, 0, textstr.length(), bounds);
textDesPaint.getTextBounds(mTextDes, 0, mTextDes.length(), bounds);
// drawText各个属性的意思(文字,x坐标,y坐标,画笔)
canvas.drawText(
textstr + "",
(mColorWheelRectangle.centerX())
- (textPaint.measureText(textstr) / 2),
mColorWheelRectangle.centerY() + bounds.height() / 2 - 50,
textPaint);
canvas.drawText(mTextDes,
(mColorWheelRectangle.centerX())
- (textDesPaint.measureText(mTextDes) / 2),
mColorWheelRectangle.centerY() + bounds.height() / 2 - 50 - mDistance
, textDesPaint);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = getDefaultSize(getSuggestedMinimumHeight(),
heightMeasureSpec);
int width = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec);
int min = Math.min(width, height);
setMeasuredDimension(min, min);
mColorWheelRadius = min - circleStrokeWidth - pressExtraStrokeWidth;
mColorWheelRectangle.set(circleStrokeWidth + pressExtraStrokeWidth, circleStrokeWidth + pressExtraStrokeWidth,
mColorWheelRadius, mColorWheelRadius);
}
public void setPressed(boolean pressed) {
Toast.makeText(getContext(), mText, Toast.LENGTH_SHORT).show();
}
public void startCustomAnimation() {
this.startAnimation(anim);
}
public void setText(String text) {
mText = text;
this.startAnimation(anim);
}
public void setDesText(String text) {
mTextDes = text;
this.startAnimation(anim);
}
public void setTextColor(int color) {
mTextColor = color;
textPaint.setColor(mTextColor);
}
public void setSweepAngle(float sweepAngle) {
mSweepAngle = sweepAngle;
}
public void setWheelColor(int color) {
this.mColorWheelPaint.setColor(color);
}
public class BarAnimation extends Animation {
/**
* Initializes expand collapse animation, has two types, collapse (1) and expand (0).
* 1 will collapse view and set to gone
*/
public BarAnimation() {
}
// * 动画类利用了applyTransformation参数中的interpolatedTime参数(从0到1)的变化特点，
// * 实现了该View的某个属性随时间改变而改变。原理是在每次系统调用animation的applyTransformation()方法时，
// * 改变mSweepAnglePer，mCount的值，
// * 然后调用postInvalidate()不停的绘制view。
protected void applyTransformation(float interpolatedTime, Transformation t) {
super.applyTransformation(interpolatedTime, t);
//mSweepAnglePer，mCount这两个属性只是动画过程中要用到的临时属性，
//mText和mSweepAngle才是动画结束之后表示扇形弧度和中间数值的真实值。
if (interpolatedTime < 1.0f) {
mSweepAnglePer = interpolatedTime * mSweepAngle;
mCount = (int) (interpolatedTime * Float.parseFloat(mText));
} else {
mSweepAnglePer = mSweepAngle;
mCount = Integer.parseInt(mText);
}
postInvalidate();
}
}
public static int dip2px(Context context, float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}
}