Android新建水平节点进度条示例-编程学习网

前言

效果图

前几天在网上没有找到合适的横向节点进度条，自己动手写了一个，先来看看效果图

圆圈和文字状态

我们看到小圆圈和文字有几种状态呢？

第一个空心的小圆圈是处理完成的状态
第二个实心的小圆圈是处理中的状态
第三个实心的小圆圈是待处理的状态
没错，我们看到了小圆圈和文字有三种处理状态

文字居中

我们写一个类继承自AppCompatTextView，通过onMeasure方法得到控件的宽高，通过Paint的getTextBounds（）也可以知道文字的宽高，我们看到有5个节点需要处理，我们把屏幕划分成5个等份，每个等份都相等，这里用itemWidth 表示每个相同的等份。文字居中的写法很简单，

itemWidth / 2 - textWidth / 2

代码

package cn.wwj.customview.widget
import android.content.Context
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.Paint
import android.graphics.Rect
import android.text.TextPaint
import android.util.AttributeSet
import android.util.Log
import androidx.annotation.Nullable
import androidx.appcompat.widget.AppCompatTextView
import androidx.core.content.ContextCompat
import androidx.core.view.marginTop
import cn.wwj.customview.R
import cn.wwj.customview.dp2px
import cn.wwj.customview.sp2px

class NodePointProcessBar : AppCompatTextView {
    
    private lateinit var mTextPaint: TextPaint
    
    private lateinit var mCirclePaint: Paint
    private var isDebug = false
    
    private var mCompleteTextColor: Int = ContextCompat.getColor(context, android.R.color.black)
    
    private var mProcessTextColor: Int = ContextCompat.getColor(context, R.color.purple)
    
    private var mWaitProcessTextColor: Int = ContextCompat.getColor(context, R.color.gray_text)
    
    private var mCircleCount = 0
    private var TAG = "NodePointProcessBar"
    
    private var mCircleRadius = 5f.dp2px()
    
    private var mCircleBorder = 1f.dp2px()
    
    private var mLineWidth = 1f.dp2px()
    
    private var mLineMargin = 4f.dp2px()
    
    var mTextCircleMargin = 7f.dp2px()
    
    private var mTextLeftRightMargin = 8f.dp2px()
    
    private var mContentHeight = 0f
    private var mContentWidth = 0f
    
    private var mTextList: List<String> = mutableListOf()
    
    private var mProcessIndexSet: Set<Int> = mutableSetOf()
    
    private var mTextBoundList: MutableList<Rect> = mutableListOf()
    
    private val mRect = Rect()
    constructor(context: Context) : this(context, null)
    constructor(context: Context, @Nullable attrs: AttributeSet?) : this(context, attrs, 0)
    constructor(
        context: Context,
        @Nullable attrs: AttributeSet?,
        defStyleAttr: Int
    ) : super(context, attrs, defStyleAttr) {
        val appearance = context.obtainStyledAttributes(attrs, R.styleable.NodePointProcessBar)
        mCompleteTextColor = appearance.getColor(
            R.styleable.NodePointProcessBar_completedTextColor, mCompleteTextColor
        )
        mWaitProcessTextColor = appearance.getColor(
            R.styleable.NodePointProcessBar_processTextColor, mWaitProcessTextColor
        )
        mProcessTextColor =
            appearance.getColor(
                R.styleable.NodePointProcessBar_waitProcessTextColor,
                mProcessTextColor
            )
        isDebug = appearance.getBoolean(
            R.styleable.NodePointProcessBar_isDebug, isDebug
        )
        mTextCircleMargin = appearance.getDimension(
            R.styleable.NodePointProcessBar_textCircleMargin, mTextCircleMargin
        )
        mTextLeftRightMargin = appearance.getDimension(
            R.styleable.NodePointProcessBar_textLeftRightMargin, mTextLeftRightMargin
        )
        mCircleRadius = appearance.getDimension(
            R.styleable.NodePointProcessBar_npbCircleRadius, mCircleRadius
        )
        mCircleBorder = appearance.getDimension(
            R.styleable.NodePointProcessBar_circleBorder, mCircleBorder
        )
        mLineWidth = appearance.getDimension(
            R.styleable.NodePointProcessBar_lineWidth, mLineWidth
        )
        mLineMargin = appearance.getDimension(
            R.styleable.NodePointProcessBar_lineMargin, mLineMargin
        )
        initPaint()
        show(mTextList, mProcessIndexSet)
    }
    
    private fun initPaint() {
        // 设置文字画笔
        mTextPaint = TextPaint()
        mTextPaint.isAntiAlias = true
        mTextPaint.textSize = textSize
        mTextPaint.color = mWaitProcessTextColor
        // 设置圆圈画笔
        mCirclePaint = Paint()
        mCirclePaint.isAntiAlias = true
        mCirclePaint.color = mProcessTextColor
        mCirclePaint.style = Paint.Style.STROKE
        mCirclePaint.strokeWidth = mCircleBorder
    }
    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec)
        val widthMode = MeasureSpec.getMode(widthMeasureSpec)
        val heightMode = MeasureSpec.getMode(heightMeasureSpec)
        Log.d(TAG, "---------------onMeasure()")
        measureText()
        val widthSize = if (MeasureSpec.EXACTLY == widthMode) {
            MeasureSpec.getSize(widthMeasureSpec)
        } else {
            mContentWidth.toInt()
        }
        val heightSize = if (MeasureSpec.EXACTLY == heightMode) {
            MeasureSpec.getSize(heightMeasureSpec)
        } else {
            mContentHeight.toInt()
        }
        
        setMeasuredDimension(widthSize, heightSize)
        calcContentWidthHeight()
    }
    
    private fun measureText() {
        Log.d(TAG, "---------------measureText()")
        mTextBoundList.clear()
        for (name in mTextList) {
            mRect.setEmpty()
            mTextPaint.getTextBounds(name, 0, name.length, mRect)
            mTextBoundList.add(mRect)
        }
    }
    
    private fun calcContentWidthHeight() {
        // 一开始没有传递文字的
        mContentHeight = if (mTextBoundList.isNotEmpty()) {
            mCircleRadius * 2 + mTextCircleMargin + mRect.height() + getBaseline(mTextPaint)
        } else {
            mTextPaint.getTextBounds("中", 0, 1, mRect)
            mCircleRadius * 2 + mTextCircleMargin + mRect.height() + getBaseline(mTextPaint)
        }
        if (measuredWidth == 0 || mTextBoundList.isEmpty()) {
            return
        }
        mContentWidth = 0f
        for (rect in mTextBoundList) {
            mContentWidth += rect.width()
        }
        Log.d(TAG, "---------------measuredWidth=$measuredWidth,mContentWidth=$mContentWidth")
        // 如果控件的宽度小于内容的宽度加文本的边距,意味着一行放不下了,文字的大小减小1sp,重新测量文字的宽高后,设置控件得高度
        // 如果控件的宽度大于内容的宽度加文本的边距,意味着一行放得下,设置控件得高度
        if (measuredWidth - mContentWidth < (mTextLeftRightMargin * (mTextList.size - 1))) {
            mTextPaint.textSize = mTextPaint.textSize - 1f.sp2px()
            measureText()
            calcContentWidthHeight()
            return
        }
        setMeasuredDimension(measuredWidth, mContentHeight.toInt())
    }
    override fun onDraw(canvas: Canvas) {
        //若未设置节点或者选中项的列表，则取消绘制
        if (mTextList.isEmpty() || mTextBoundList.isEmpty()) {
            return
        }
        //画灰色圆圈的个数
        mCircleCount = mTextList.size
        // 每一段文字的Y坐标
        val textY = getBaseline(mTextPaint) + height / 2 + marginTop / 2
        mCirclePaint.strokeWidth = mCircleBorder
        //绘制文字和圆形
        for (i in 0 until mCircleCount) {
            if (mProcessIndexSet.contains(i)) {
                // 正在处理中
                if (mProcessIndexSet.size == i + 1) {
                    mCirclePaint.style = Paint.Style.FILL
                    // 正在处理中的文字颜色
                    mTextPaint.color = mProcessTextColor
                    mCirclePaint.color = mProcessTextColor
                } else {
                    //处理完成圆圈空心
                    mCirclePaint.style = Paint.Style.STROKE
                    //处理完成文字颜色
                    mTextPaint.color = mCompleteTextColor
                    mCirclePaint.color = mProcessTextColor
                }
            } else {
                //待处理
                mCirclePaint.color = mWaitProcessTextColor
                mCirclePaint.style = Paint.Style.FILL
                mTextPaint.color = mWaitProcessTextColor
            }
            //每一段文字宽度
            val textWidth = mTextBoundList[i].width()
            // 每一段宽度
            val itemWidth = width * 1f / mCircleCount
            // 每一段文字居中
            // |----text----|----text----|
            //    一段文字       一段文字
            //每一段文字起始的X坐标
            val textX = itemWidth / 2f - textWidth / 2f + i * itemWidth
            canvas.drawText(mTextList[i], textX, textY, mTextPaint)
            //每一个圆圈的Y坐标
            val circleY = height / 2f - mCircleRadius - mTextCircleMargin / 2
            //每一个圆圈的X坐标
            val circleX = itemWidth / 2 + i * itemWidth
            canvas.drawCircle(
                circleX,
                circleY,
                mCircleRadius,
                mCirclePaint
            )
            // 画线,两个圆圈之间一条线段
            mCirclePaint.strokeWidth = mLineWidth
            if (i < mCircleCount - 1) {
                //已经处理过的线颜色
                if (mProcessIndexSet.contains(i + 1)) {
                    mCirclePaint.color = mProcessTextColor
                } else {
                    // 待处理的线段颜色
                    mCirclePaint.color = mWaitProcessTextColor
                }
                // 线段起始 x 坐标
                val lineStartX = itemWidth * i + itemWidth / 2f + mCircleRadius + mLineMargin
                // 线段结束 x 坐标
                val lineEndX =
                    itemWidth * i + itemWidth + itemWidth / 2f - mCircleRadius - mLineMargin
                canvas.drawLine(
                    lineStartX,
                    circleY,
                    lineEndX,
                    circleY,
                    mCirclePaint
                )
            }
            Log.d("tag", "--------itemWidth=$itemWidth")
        }
        if (isDebug) {
            mCirclePaint.color = Color.RED
            canvas.drawLine(
                0f,
                height / 2f - 1f.dp2px() / 2,
                width * 1F,
                height / 2f + 1f.dp2px() / 2,
                mCirclePaint
            )
        }
    }
    
    fun setNodeData(titles: List<String>, progressIndexSet: Set<Int>) {
        mTextList = titles
        mProcessIndexSet = progressIndexSet
        measureText()
        calcContentWidthHeight()
        invalidate()
    }
    
    private fun getBaseline(p: Paint): Float {
        val fontMetrics: Paint.FontMetrics = p.fontMetrics
        return (fontMetrics.bottom - fontMetrics.top) - fontMetrics.descent
    }
}

这里的show()方法用于展示内容，第一个参数要展示的内容列表，第二个参数代表节点选中项集合，紧接着测量文字的宽高，调用这个方法calcContentWidthHeight（）获取文字的高度，然后设置文字的宽高，代码中的注释写的很详细，我们就不再细说了

声明下style

attrs.xml

 <declare-styleable name="NodePointProcessBar">
        <attr name="completedTextColor" format="color" />
        <attr name="processTextColor" format="color" />
        <attr name="waitProcessTextColor" format="color" />
        <attr name="textCircleMargin" format="dimension" />
        <attr name="textLeftRightMargin" format="dimension" />
        <attr name="npbCircleRadius" format="dimension" />
        <attr name="circleBorder" format="dimension" />
        <attr name="lineWidth" format="dimension" />
        <attr name="lineMargin" format="dimension" />
        <attr name="isDebug" format="boolean" />
    </declare-styleable>

新建一个ExtendUtil.kt文件

fun Int.sp2px(): Int {
    val displayMetrics = Resources.getSystem().displayMetrics
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, this.toFloat(), displayMetrics)
        .toInt()
}
fun Float.sp2px(): Float {
    val displayMetrics = Resources.getSystem().displayMetrics
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, this, displayMetrics)
}
fun Int.dp2px(): Int {
    val displayMetrics = Resources.getSystem().displayMetrics
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, this.toFloat(), displayMetrics)
        .toInt()
}
fun Float.dp2px(): Float {
    val displayMetrics = Resources.getSystem().displayMetrics
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, this, displayMetrics)
}

接着创建布局文件

activity_node_progress_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <cn.wwj.customview.widget.NodePointProcessBar
        android:id="@+id/nodePointPb"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:layout_marginHorizontal="10dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:isDebug="false"
        app:lineWidth="1dp"
        app:lineMargin="5dp"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

再Activity中使用它

package cn.wwj.customview
import android.os.Bundle
import android.os.Handler
import android.os.Looper
import androidx.appcompat.app.AppCompatActivity
import cn.wwj.customview.widget.NodePointProcessBar

class NodeProgressBarActivity : AppCompatActivity() {
    
    private val mTextList: List<String> = mutableListOf("提交申请", "商家处理", "寄回商品", "商家退款", "退款成功")
    
    private var mProgressIndexSet: Set<Int> = mutableSetOf(0, 1,2,3,4,6)
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_node_progress_bar)
        val nodePointPb: NodePointProcessBar = findViewById(R.id.nodePointPb)
        Handler(Looper.getMainLooper()).postDelayed({
            nodePointPb.setNodeData(mTextList, mProgressIndexSet)
        }, 1000)
    }
}

mTextList数据集合

mProgressIndexSet正在处理的节点索引结合，创建Handler对象模拟调用网络接口，1秒后返回数据

节点全部处理完成.png

项目地址，在customview这模块下

https://github.com/githubwwj/MyAndroid

以上就是Android新建水平节点进度条示例的详细内容，更多关于Android水平节点进度条的资料请关注编程网其它相关文章！

文章详情

Android新建水平节点进度条示例

目录

前言

效果图

圆圈和文字状态

文字居中

代码

声明下style

接着创建布局文件

再Activity中使用它

mTextList数据集合

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