Test测试

package com.example.wireframe;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Transformation;

/*
 * 1.该view在设置属性之后时候会有数字和圆圈不断增长的效果
 * 2.该view在按下和放开状态下显示不同的样式。
 */

public class CircleBar extends View {
    private static final String TAG = "cn.netmoon.netmoondevicemanager.widget.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; // 中间文字的画笔
    private float mColorWheelRadius;// 圆圈普通状态下的半径
    private float circleStrokeWidth;// 圆圈的线条粗细
    private float pressExtraStrokeWidth;// 按下状态下增加的圆圈线条增加的粗细
    private String mText;// 中间文字内容
    private int mCount; // 为了达到数字增加效果而添加的变量，他和mText其实代表一个意思
    private float mSweepAnglePer;// 为了达到蓝色扇形增加效果而添加的变量，他和mSweepAngle其实代表一个意思
    private float mSweepAngle;// 扇形弧度
    private int mTextSize;// 文字颜色
    BarAnimation anim;// 动画类

    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) {
        circleStrokeWidth = dip2px(getContext(), 10);
        pressExtraStrokeWidth = dip2px(getContext(), 2);
        // 构造方法调用之后，第一个调用的是init方法，在该方法
        // 中初始化了各种画笔的颜色，风格等，字体大小和线条
        // 粗细则使用了我自己定义的工具函数dip2px()，这样做的
        // 目的是在不同分辨率的手机上，相同数值的最终显示效果
        // 差别不大，比如字体大小mTextSize的初始化：
        mTextSize = dip2px(getContext(), 40);
        mColorWheelPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mColorWheelPaint.setColor(0xFF29a6f6);
        mColorWheelPaint.setStyle(Paint.Style.STROKE);
        mColorWheelPaint.setStrokeWidth(circleStrokeWidth);
        mDefaultWheelPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mDefaultWheelPaint.setColor(0xFFeeefef);
        mDefaultWheelPaint.setStyle(Paint.Style.STROKE);
        mDefaultWheelPaint.setStrokeWidth(circleStrokeWidth);
        textPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.LINEAR_TEXT_FLAG);
        textPaint.setColor(0xFF333333);
        textPaint.setStyle(Paint.Style.FILL_AND_STROKE);
        textPaint.setTextAlign(Align.LEFT);
        textPaint.setTextSize(mTextSize);
        mText = "0";
        mSweepAngle = 0;
        anim = new BarAnimation();
        anim.setDuration(2000);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawArc(mColorWheelRectangle, -90, 360, false,
                mDefaultWheelPaint);
        // 在onDraw方法中我们绘制了圆圈、扇形以及文字，
        // 但是绘制需要用到的一些坐标值是经过计算得出的，比如绘制扇形：
        canvas.drawArc(mColorWheelRectangle, -90, mSweepAnglePer, false,
                mColorWheelPaint);
        Rect bounds = new Rect();
        String textstr = mCount + "";
        textPaint.getTextBounds(textstr, 0, textstr.length(), bounds);
        canvas.drawText(textstr + "", (mColorWheelRectangle.centerX())
                - (textPaint.measureText(textstr) / 2),
                mColorWheelRectangle.centerY() + bounds.height() / 2, textPaint);
    }

    // mColorWheelRectangle是一个矩形，
    // 这个矩形的上下左右边界都是在onMeasure方法中根据控件所分配的大小得出来的。
    @Override
    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);
    }

    @Override
    public void setPressed(boolean pressed) {
        Log.i(TAG, "call setPressed ");
        if (pressed) {
            mColorWheelPaint.setColor(0xFF165da6);
            textPaint.setColor(0xFF070707);
            mColorWheelPaint.setStrokeWidth(circleStrokeWidth
                    + pressExtraStrokeWidth);
            mDefaultWheelPaint.setStrokeWidth(circleStrokeWidth
                    + pressExtraStrokeWidth);
            textPaint.setTextSize(mTextSize - pressExtraStrokeWidth);
        } else {
            mColorWheelPaint.setColor(0xFF29a6f6);
            textPaint.setColor(0xFF333333);
            mColorWheelPaint.setStrokeWidth(circleStrokeWidth);
            mDefaultWheelPaint.setStrokeWidth(circleStrokeWidth);
            textPaint.setTextSize(mTextSize);
        }
        super.setPressed(pressed);
        this.invalidate();
    }

    public void startCustomAnimation() {
        this.startAnimation(anim);
    }

    public void setText(String text) {
        mText = text;
        this.startAnimation(anim);
    }

    public void setSweepAngle(float sweepAngle) {
        mSweepAngle = sweepAngle;
    }

    public class BarAnimation extends Animation {

        /**
         * Initializes expand collapse animation, has two types, collapse (1)
         * and expand (0).
         * 
         * @param view
         *            The view to animate
         * @param type
         *            The type of animation: 0 will expand from gone and 0 size
         *            to visible and layout size defined in xml. 1 will collapse
         *            view and set to gone
         */

        public BarAnimation() {}

        @Override
        protected void applyTransformation(float interpolatedTime,
                Transformation t) {
            super.applyTransformation(interpolatedTime, t);
            // 这个动画类利用了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。
            if (interpolatedTime < 1.0f) {
                mSweepAnglePer = interpolatedTime * mSweepAngle;
                mCount = (int) (interpolatedTime * Float.parseFloat(mText));
            } else {
                // 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。
                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);
    }

}