Android 仪表盘组件范例，需要稍加修改即可。，android仪表盘,支持android 2.

Android 仪表盘组件范例，需要稍加修改即可。，android仪表盘,支持android 2.

支持android 2.2以上平台。注：代码中有用到一个工具类的dpToPx的方法，用来转换dp单位值到px的，暂时没有提供，朋友们可以自行编写然后对代码进行替换。

在activity中使用，下面是范例代码, 至于怎么正确放置代码，相信做过android的朋友都很熟悉了。

       FinanceScoreDialView fcdView =new  FinanceScoreDialView(context);       addview(fcdView);        fcdView.setValues(new double[]{80.5, 10});        fcdView.setScoreTitleString("第三季度");        fcdView.setRankingTitleString("行业排名");        fcdView.setScoreTitleColor(0xff666666);        fcdView.setScoreColor(0xffc1611e);        fcdView.setRankingTitleColor(0xff666666);        fcdView.setRankingColor(Color.WHITE);        fcdView.setInnerScoreRingColor(0xffc1ddf9);        fcdView.setOuterScoreRingColor(0xff328deb);        fcdView.setOuterScoreSelRingColor(0xffc1611e);        fcdView.setScoreAxisLineColor(0xff00ff00);        fcdView.setScoreAxisLables(5);        fcdView.postInvalidate();

import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.view.View;import java.text.NumberFormat;class FinanceScoreDialView extends  View{    private double score;   //    private int ranking;    private String mScoreTitleStr;     //表盘标题    private String mRankingTitleStr;       private int mScoreAxisLineColor;   //表盘刻度文字    public void setScoreTitleColor(int mScoreTitleColor) {        this.mScoreTitleColor = mScoreTitleColor;    }    public void setScoreColor(int mScoreColor) {        this.mScoreColor = mScoreColor;    }    public void setRankingTitleColor(int mRankingTitleColor) {        this.mRankingTitleColor = mRankingTitleColor;    }    public void setRankingColor(int mRankingColor) {        this.mRankingColor = mRankingColor;    }    private int mScoreTitleColor;  //表盘标题文字颜色    private int mScoreColor;          private int mRankingTitleColor;    private int mRankingColor;    public void setInnerScoreRingColor(int mInnerScoreRingColor) {        this.mInnerScoreRingColor = mInnerScoreRingColor;    }    public void setOuterScoreRingColor(int mOuterScoreRingColor) {        this.mOuterScoreRingColor = mOuterScoreRingColor;    }    public void setOuterScoreSelRingColor(int mOuterScoreSelRingColor) {        this.mOuterScoreSelRingColor = mOuterScoreSelRingColor;    }    public void setScoreAxisLineColor(int axisLineColor){        this.mScoreAxisLineColor = axisLineColor;    }    private int mInnerScoreRingColor;    private int mOuterScoreRingColor;    private int mOuterScoreSelRingColor;    private float totalScore = 100;    private float stepDegree = -1;    public void setScoreAxisLables(int scoreAxisLables) {        this.scoreAxisLables = scoreAxisLables;        axisLabelStrs = new String[scoreAxisLables];        float step = totalScore / (scoreAxisLables-1);        for (int i =0; i< scoreAxisLables; i++){            axisLabelStrs[i] = String.valueOf(nFormat2.format(step *i));        }        float sweepAngle = 180+Math.abs(2*offset_degree);        stepDegree = sweepAngle/(scoreAxisLables-1);    }    private int scoreAxisLables;    private String[] axisLabelStrs;    private float axisLineWidth = Tool.dpToPx(0.5f);    private float axisLableTextSize = Tool.dpToPx(12);    private Paint axisLablePaint = new Paint();    private float leftmargin = Tool.dpToPx(5);    private float v_margin = Tool.dpToPx(15);    private float h_space  = Tool.dpToPx(15);    private float ring_space = Tool.dpToPx(5);    private float outter_ringWidth = Tool.dpToPx(1);    private float inner_ringWidth = Tool.dpToPx(5);    private Paint rankingTextPaint = new Paint();    private Paint scoreTextPaint = new Paint();    private Paint scoreRingPaint = new Paint();    private float scoreTitleTextSize = Tool.dpToPx(14);    private float rankingTitleTextSize = Tool.dpToPx(14);    private float scoreTextSize  = Tool.dpToPx(40);    private float rankingTextSize  = Tool.dpToPx(30);    private static final float offset_degree = -10;  //负代表往下偏移10度    private float maxOutterScoreDiameter = -1;    private float maxOutterScoreRadius = -1;    private float innerScoreDiameter = -1;    private RectF ring_rectf = new RectF();    private static NumberFormat nFormat = NumberFormat.getNumberInstance();    private static NumberFormat nFormat2 = NumberFormat.getNumberInstance();    static{        nFormat.setMaximumFractionDigits(2);        nFormat.setMinimumFractionDigits(2);        nFormat2.setMaximumFractionDigits(0);    }    public FinanceScoreDialView(Context context) {        super(context);        init();    }    private void init(){        rankingTextPaint.setAntiAlias(true);        scoreTextPaint.setAntiAlias(true);        scoreRingPaint.setAntiAlias(true);    }    public void setValues(double[] values){        if(null != values){            if(values.length >0){                score = values[0];            }            if(values.length >1 ){                ranking = (int)values[1];            }        }    }    public void setScoreTitleString(String str){        this.mScoreTitleStr = str;    }    public void setRankingTitleString(String str){        this.mRankingTitleStr = str;    }    public  void onMeasure(int widthMeasureSpec, int heightMeasureSpec){        int specWidth = MeasureSpec.getSize(widthMeasureSpec);        int measuredWidth = specWidth;        int measuredHeight = 0;        scoreTextPaint.setTextSize(scoreTitleTextSize);        float scoretitle_h  = getFontHeight(scoreTextPaint);        float scoretitle_w = scoreTextPaint.measureText(mScoreTitleStr);        scoreTextPaint.setTextSize(scoreTextSize);        float score_h  = getFontHeight(scoreTextPaint);        float score_w = scoreTextPaint.measureText(nFormat.format(score));        float totalh_score = scoretitle_h + Tool.dpToPx(5) + score_h;        float totalw_score = Math.max(scoretitle_w,score_w) + 2*Tool.dpToPx(20);        float score_diameter = Math.max(totalw_score, totalh_score);        float max_outter_score_diameter = score_diameter + 2* (inner_ringWidth + ring_space + outter_ringWidth);        maxOutterScoreDiameter = max_outter_score_diameter;        innerScoreDiameter = max_outter_score_diameter - 2*(outter_ringWidth + ring_space);        float max_outter_score_radius = max_outter_score_diameter/2;        maxOutterScoreRadius = max_outter_score_radius;        measuredHeight += max_outter_score_radius;        double rAngle = Math.toRadians(90 - (-180 + offset_degree));        measuredHeight += Math.abs(max_outter_score_radius*Math.cos(rAngle));        measuredHeight += 2*v_margin;        setMeasuredDimension(measuredWidth, measuredHeight);    }    public void onDraw(Canvas canvas){        int startX = getScrollX();        int startY = getScrollY();        rankingTextPaint.setTextSize(rankingTitleTextSize);        rankingTextPaint.setColor(mRankingTitleColor);        float rankingTitleBaseline = startY + v_margin + getFontTopYToBaseline(rankingTextPaint);        canvas.drawText(mRankingTitleStr, startX + leftmargin, rankingTitleBaseline, rankingTextPaint);        float rankingTitle_w = rankingTextPaint.measureText(mRankingTitleStr);        //圆心纵横坐标        float centerX  = startX + leftmargin + h_space + rankingTitle_w + maxOutterScoreDiameter/2;        float centerY =startY + v_margin + maxOutterScoreDiameter/2;        float max_outter_ring_startX = centerX - maxOutterScoreDiameter/2 + outter_ringWidth/2;        float max_outter_ring_startY = v_margin + outter_ringWidth/2;        float max_outter_ring_endX = max_outter_ring_startX + maxOutterScoreDiameter - outter_ringWidth;        float max_outter_ring_endY = max_outter_ring_startY + maxOutterScoreDiameter - outter_ringWidth;        ring_rectf.set(max_outter_ring_startX, max_outter_ring_startY, max_outter_ring_endX, max_outter_ring_endY);        scoreRingPaint.setStyle(Paint.Style.STROKE);        scoreRingPaint.setStrokeWidth(outter_ringWidth);        scoreRingPaint.setColor(mOuterScoreRingColor);        float startAngle = -180 + offset_degree;        float sweepAngle = 180+Math.abs(2*offset_degree);        float sweepAngle1 = (float)(sweepAngle * score/ totalScore);        if(sweepAngle1 > sweepAngle || (sweepAngle-sweepAngle1<1)){            sweepAngle1 = sweepAngle;        }        canvas.drawArc(ring_rectf,startAngle,sweepAngle,false,scoreRingPaint );    //画外环        scoreRingPaint.setColor(mOuterScoreSelRingColor);        canvas.drawArc(ring_rectf,startAngle,sweepAngle1,false,scoreRingPaint );        float inner_ring_startX = centerX - innerScoreDiameter/2 + inner_ringWidth/2;        float inner_ring_startY = centerY - innerScoreDiameter/2 + inner_ringWidth/2;        float inner_ring_endX = inner_ring_startX + innerScoreDiameter - inner_ringWidth;        float inner_ring_endY = inner_ring_startY + innerScoreDiameter - inner_ringWidth;        ring_rectf.set(inner_ring_startX, inner_ring_startY, inner_ring_endX, inner_ring_endY);        scoreRingPaint.setStrokeWidth(inner_ringWidth);        scoreRingPaint.setColor(mInnerScoreRingColor);        canvas.drawArc(ring_rectf, startAngle, sweepAngle, false, scoreRingPaint);        for (int i =0; i<scoreAxisLables; i++){            float degree = -1;            degree =  -180 + offset_degree + stepDegree * i;            double radian = Math.toRadians(90-degree);            float shortRadius = innerScoreDiameter/2 - inner_ringWidth;            float longRadius = innerScoreDiameter/2;            double sinValue = Math.sin(radian);                    double cosValue = Math.cos(radian);            float x1 =  (float) (centerX +shortRadius * sinValue);            float y1 = (float)(centerY +shortRadius * cosValue);            float x2 = (float)(centerX +  longRadius * sinValue);            float y2 = (float)(centerY + longRadius * cosValue);            scoreRingPaint.setStyle(Paint.Style.STROKE);            scoreRingPaint.setStrokeWidth(axisLineWidth);            scoreRingPaint.setColor(mScoreAxisLineColor);            canvas.drawLine(x1, y1, x2, y2, scoreRingPaint);            axisLablePaint.setTextSize(axisLableTextSize);            axisLablePaint.setTextAlign(Paint.Align.CENTER);            axisLablePaint.setColor(mInnerScoreRingColor);            float axisLable_fonth = getFontHeight(axisLablePaint);            float labelRadius =innerScoreDiameter/2 - inner_ringWidth - axisLable_fonth/2 + 3;            float x3 =  (float) (centerX + labelRadius * sinValue);                    float y3  =(float) (centerY + labelRadius * cosValue);            canvas.save();            canvas.rotate(90+ degree,x3,y3);    //绘制倾斜文字            canvas.drawText(axisLabelStrs[i],x3,y3 + getFontCenterYToBaseLine(axisLablePaint),axisLablePaint);            canvas.restore();        }        scoreTextPaint.setTextAlign(Paint.Align.CENTER);        scoreTextPaint.setTextSize(scoreTextSize);        scoreTextPaint.setColor(mScoreColor);        double rAngle = Math.toRadians(90 - (-180 + offset_degree));    //弧度        float offset_y = (float)(maxOutterScoreRadius*Math.cos(rAngle));        float scoreBaselineY = centerY + offset_y;        float tempH = getFontTopYToBaseline(scoreTextPaint);        canvas.drawText(nFormat.format(score), centerX, scoreBaselineY, scoreTextPaint);        scoreTextPaint.setTextSize(scoreTitleTextSize);        scoreTextPaint.setColor(mScoreTitleColor);        float scoreTitleBaselineY = scoreBaselineY - tempH - Tool.dpToPx(2);        canvas.drawText(mScoreTitleStr, centerX, scoreTitleBaselineY, scoreTextPaint);    }    public static float getFontHeight(Paint textPaint){        Paint.FontMetrics fm = textPaint.getFontMetrics();        return (float)Math.ceil(fm.descent - fm.ascent) + 3;    }    public static float getFontTopYToBaseline(Paint textPaint){        Paint.FontMetrics fm = textPaint.getFontMetrics();        return (float)Math.ceil(-fm.ascent) + 3;    }    public static float getFontBottomYToBaseline(Paint textPaint){        Paint.FontMetrics fm = textPaint.getFontMetrics();        return (float)Math.ceil(fm.descent) + 3;    }    public static float getFontCenterYToBaseLine(Paint textPaint){        Paint.FontMetrics fm = textPaint.getFontMetrics();        float fonth = getFontHeight(textPaint);        return (float)Math.abs(Math.ceil(fonth/2- fm.descent));    }}