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笔记20171127-Android仿滴滴呼叫车时转圈圈的Vie

2017-11-27  本文已影响0人  hello我的world

需求:

类似滴滴打车,呼叫车,但是司机还未接单,等待计时的自定义View

要达到的效果:

转圈圈.jpeg
hongyang大神的自定义View教程中的思路实现的

相关代码:

1.attrs.xml(这个文件里放的是自定义view的属性)
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <attr name="firstColor" format="color"/>
    <attr name="secondColor" format="color"/>
    <attr name="circleWidth" format="dimension"/>
    <attr name="speed" format="integer"/>
    <attr name="textSize" format="dimension"/>
    <attr name="textColorFirst" format="color"/>
    <attr name="textColorSecond" format="color"/>

    <declare-styleable name="circle">
        <attr name="firstColor"/>
        <attr name="secondColor"/>
        <attr name="circleWidth"/>
        <attr name="speed"/>
        <attr name="textSize"/>
        <attr name="textColorFirst"/>
        <attr name="textColorSecond"/>
    </declare-styleable>
</resources>
2.自定义的View 我给它起名叫CircleView(反正就是个圆)
package weekimwee.cn.circleviewdemo;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;

import java.math.BigDecimal;
import java.text.SimpleDateFormat;

/**
 * Created by Wee Kim Wee on 2017/10/23.
 */

public class CircleView extends View {
    private int firstColor;
    private int secondColor;
    private int circleWidth;
    private int speed;
    private int textSize;
    private float progress;
    private boolean isNext;
    private String bigCircleText;
    private int bigCircleTextColor;
    private int time;
    private DrawThread drawThread;
    private SimpleDateFormat formatter = new SimpleDateFormat("mm分ss秒");
    private final String LOADING ="已等待";
    private Paint paint;
    public CircleView(Context context) {
        this(context,null);
    }

    public CircleView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs,0);
    }

    public CircleView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.circle, defStyleAttr, 0);
        int n = a.getIndexCount();
        for(int i = 0; i < n; i++){
            int attr = a.getIndex(i);
            switch (attr){
                case R.styleable.circle_firstColor:
                    firstColor = a.getColor(attr, Color.GRAY);
                    break;
                case R.styleable.circle_secondColor:
                    secondColor = a.getColor(attr,Color.GRAY);
                    break;
                case R.styleable.circle_circleWidth:
                    circleWidth = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(
                            TypedValue.COMPLEX_UNIT_PX, 20, getResources().getDisplayMetrics()));
                    break;
                case R.styleable.circle_speed:
                    speed=a.getInt(attr, 20);
                    break;
                case R.styleable.circle_textSize:
                    textSize =a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(
                            TypedValue.COMPLEX_UNIT_SP, 16, getResources().getDisplayMetrics()));
                    break;
                case R.styleable.circle_textColorFirst:
                    bigCircleTextColor = a.getColor(attr,Color.BLACK);
                    break;
            }
        }
        a.recycle();
        bigCircleText = "00分00秒";

        paint = new Paint();
        drawThread = new DrawThread();
        drawThread.start();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        //大圆
        int centre = getWidth() / 2; // 获取圆心的x坐标
        int radius = (centre - circleWidth / 2)-25;// 半径
        paint.setStrokeWidth(circleWidth); // 设置圆环的宽度
        paint.setAntiAlias(true); // 消除锯齿
        paint.setStyle(Paint.Style.STROKE); // 设置空心
        RectF oval = new RectF(centre - radius, centre - radius, centre + radius, centre + radius); // 用于定义的圆弧的形状和大小的界限

        //跟着跑的小圆
        float h = (float) (2*( Math.PI / 360) * progress);
        float x = (float) ( radius+25+Math.sin(h) * radius);
        float y = (float) (radius+25-Math.cos(h) * radius);
        //在180度位置上的圆
        //float hc = (float) (2*( Math.PI / 360) * 180);
        //float xc = (float) ( radius+25+Math.sin(hc) * radius);
        //float yc = (float) (radius+25-Math.cos(hc) * radius);

        //大圆边框绘制颜色
        if (!isNext) {// 第一颜色的圈完整,第二颜色跑
            paint.setColor(firstColor); // 设置圆环的颜色
            canvas.drawCircle(centre, centre, radius, paint); // 画出圆环
            paint.setColor(secondColor); // 设置圆环的颜色
            canvas.drawArc(oval, -90, progress, false, paint); // 根据进度画圆弧

            paint.setColor(secondColor);
            paint.setStyle(Paint.Style.FILL);
            canvas.drawCircle(x,y,10,paint);
            //paint.setColor(firstColor);
            //paint.setStyle(Paint.Style.FILL);
            //canvas.drawCircle(xc,yc,10,paint);
        } else {
            paint.setColor(secondColor); // 设置圆环的颜色
            canvas.drawCircle(centre, centre, radius, paint); // 画出圆环
            paint.setColor(firstColor); // 设置圆环的颜色
            canvas.drawArc(oval, -90, progress, false, paint); // 根据进度画圆弧

            paint.setColor(firstColor);
            paint.setStyle(Paint.Style.FILL);
            canvas.drawCircle(x,y,8,paint);
            //paint.setColor(secondColor);
            //paint.setStyle(Paint.Style.FILL);
            //canvas.drawCircle(xc,yc,10,paint);
        }


        paint.setTextSize(textSize);
        //已等待
        float loadingTextWidth = paint.measureText(LOADING);
        paint.setColor(Color.GRAY);
        paint.setStrokeWidth(1);
        canvas.drawText(LOADING,centre-loadingTextWidth/2,centre-textSize,paint);
        //几分几秒
        float bigCircleTextWidth = paint.measureText(bigCircleText);
        paint.setColor(bigCircleTextColor);
        canvas.drawText(bigCircleText, centre - bigCircleTextWidth / 2, centre + textSize , paint);
    }

    public void stop(){
        drawThread.close();
    }

    class DrawThread extends Thread {

        private boolean isRun = true;

        @Override
        public void run() {
            while (isRun) {
                BigDecimal b1 = new BigDecimal(Float.toString(progress));
                BigDecimal b2 = new BigDecimal(Float.toString(0.3f));
                progress = b1.add(b2).floatValue();
                if (progress == 360) {
                    progress = 0;
                    if (!isNext)
                        isNext = true;
                    else
                        isNext = false;
                }
                time = time+speed;
                postInvalidate();
                bigCircleText = formatter.format(time);
                try {
                    Thread.sleep(speed);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }

        public void close() {
            isRun = false;
        }
    }
}
3.activity_main.xml布局中使用上述View
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="weekimwee.cn.circleviewdemo.MainActivity">

    <TextView
        android:layout_alignParentTop="true"
        android:padding="20dp"
        android:id="@+id/helloworld"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />

    <weekimwee.cn.circleviewdemo.CircleView
        android:id="@+id/view"
        android:layout_centerInParent="true"
        android:layout_width="200dp"
        android:layout_height="200dp"
        app:firstColor="#ff4500"
        app:secondColor="#d3d3d3"
        app:circleWidth="2dp"
        app:speed="25"
        app:textSize="20sp"
        app:textColorFirst ="#ff4500"
        app:textColorSecond="#d3d3d3"
        />
</RelativeLayout>
4.MainActivity.java中使用View开始计时
package weekimwee.cn.circleviewdemo

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        helloworld.setOnClickListener {
            view.stop()
        }
    }
}

实现思路:

必要条件:
  • 空心大圆,两种颜色
  • 实心的小圆,也是两种颜色
  • 计时线程,30秒小圆要绕着大圆走一圈并更换颜色,大圆中间的text显示计时
具体代码中的实现:
  • 在构造方法中把属性获取下来
  • 计时的线程开始启动,线程中的逻辑:
    360度的大圆,每25毫秒转0.3f度,转1200次刚好转完,刚好30秒(因为我没有用动画,直接是在View中重绘的,如果是3度这样的,会显的一卡一卡的不平滑)
  • onDraw方法:
    (1)先画大圆(大圆位置是固定的)
    (2)计算小圆的位置(每次重绘角度已经变了,所以要重新计算小圆的位置)
    (3)大圆边框绘制颜色,以及绘制小圆(小圆颜色与大圆边框一致)
    (4)绘制大圆中间的字
  • stop方法
    这个方法供外部调用停止计时线程,例如呼叫到车了,这个页面finish了之类的

以上是这个呼叫车计时等待View的笔记,demo在这里在这里

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