Paint、Canvas.2

1：使用Cavans画个简单图形

2：过程

　　2.1：绘制最外部的圆

　　

       /*** 初始化 paint */
        Paint paint;
        paint = new Paint();
        paint.setColor(Color.BLACK);
        paint.setStrokeJoin(Paint.Join.ROUND);
        paint.setStrokeCap(Paint.Cap.ROUND);
        paint.setStrokeWidth(3);
        paint.setAntiAlias(true);
        paint.setStyle(Paint.Style.STROKE);
        /*** 画圆 圆心，200,200，半径为100 */
        canvas.drawCircle(startX,startY,100,paint);
        canvas.save();

　　2.2：绘制文字made in china

　　

       /**** drawtextOnPath 绘制文字 */
        paint.setTextSize(16);
        Path path=new Path();
        path.addArc(130,130,280,280,-130,130);
        paint.setTextSize(14);
        paint.setStrokeWidth(1);
        paint.setColor(Color.GRAY);
        canvas.drawTextOnPath("made in china",path ,10,10,paint);
        canvas.save();

　　2.3：绘制表盘指针

　　

       /*** 绘制中心点圆心*/
        paint.setStyle(Paint.Style.FILL);
        canvas.drawCircle(200,200,10,paint);
        canvas.save();
        /*** 绘制红色线段，充当 秒针 */
        paint.setColor(Color.RED);
        canvas.drawLine(200,200,200,130,paint);
        canvas.save();
        /*** 绘制黑色线段，充当分针 */
        paint.setColor(Color.BLACK);
        paint.setStrokeWidth(3);
        canvas.drawLine(200,200,160,240,paint);
        canvas.save();
        /*** 绘制黑色线段，充当时针 */
        paint.setColor(Color.BLACK);
        paint.setStrokeWidth(5);
        canvas.drawLine(200,200,240,200,paint);
        canvas.save();

　　2.4：绘制表盘刻度

　　

 /*** 画表盘刻度  ****/
        Paint timePaint = new Paint(paint);
        timePaint.setStrokeWidth(1);
        timePaint.setColor(Color.BLACK);
        paint.setColor(Color.BLACK);
        paint.setStrokeWidth(3);
        int count=60;
       for(int i=0;i<=count;i++){
           if(i % 5==0){
               /*** 整点刻度 */
               canvas.drawLine(200, 100, 200, 108, paint);
               if(i!=0){
                   canvas.drawText(String.valueOf(i / 5), 195, 124, timePaint);
               }
           }else{
               /*** 小刻度 */
               canvas.drawLine(200, 100, 200, 106, timePaint);
           }
           /*** 旋转坐标系 */
           canvas.rotate(360 / count, 200, 200);
       }

3：完成绘制。

 /***示例中是传参是200,200，表示的表盘的中心点*/
private void drawDialPlate(Canvas canvas, int startX, int startY){
        canvas.save();
        /*** 初始化 paint */
        Paint paint;
        paint = new Paint();
        paint.setColor(Color.BLACK);
        paint.setStrokeJoin(Paint.Join.ROUND);
        paint.setStrokeCap(Paint.Cap.ROUND);
        paint.setStrokeWidth(3);
        paint.setAntiAlias(true);
        paint.setStyle(Paint.Style.STROKE);
        /*** 画圆 圆心，200,200，半径为100 */
        canvas.drawCircle(startX,startY,100,paint);
        canvas.save();

        /**** drawtextOnPath 绘制文字 */
        paint.setTextSize(16);
        Path path=new Path();
        path.addArc(130,130,280,280,-130,130);
        paint.setTextSize(14);
        paint.setStrokeWidth(1);
        paint.setColor(Color.GRAY);
        canvas.drawTextOnPath("made in china",path ,10,10,paint);
        canvas.save();

        /*** 绘制中心点圆心*/
        paint.setStyle(Paint.Style.FILL);
        canvas.drawCircle(200,200,10,paint);
        canvas.save();
        /*** 绘制红色线段，充当 秒针 */
        paint.setColor(Color.RED);
        canvas.drawLine(200,200,200,130,paint);
        canvas.save();
        /*** 绘制黑色线段，充当分针 */
        paint.setColor(Color.BLACK);
        paint.setStrokeWidth(3);
        canvas.drawLine(200,200,160,240,paint);
        canvas.save();
        /*** 绘制黑色线段，充当时针 */
        paint.setColor(Color.BLACK);
        paint.setStrokeWidth(5);
        canvas.drawLine(200,200,240,200,paint);
        canvas.save();

        /*** 画表盘刻度  ****/
        Paint timePaint = new Paint(paint);
        timePaint.setStrokeWidth(1);
        timePaint.setColor(Color.BLACK);
        paint.setColor(Color.BLACK);
        paint.setStrokeWidth(3);
        int count=60;
       for(int i=0;i<=count;i++){
           if(i % 5==0){
               /*** 整点刻度 */
               canvas.drawLine(200, 100, 200, 108, paint);
               if(i!=0){
                   canvas.drawText(String.valueOf(i / 5), 195, 124, timePaint);
               }
           }else{
               /*** 小刻度 */
               canvas.drawLine(200, 100, 200, 106, timePaint);
           }
           /*** 旋转坐标系 */
           canvas.rotate(360 / count, 200, 200);
       }

    }