Android自定义view 圆环占比动画绘制_风云正的技术博客_

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一、实现效果图

Android自定义view 圆环占比动画绘制_ci

二、核心代码

1.自定义属性attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <declare-styleable name="TasksCompletedView">
        <attr name="radius" format="dimension"/>
        <attr name="strokeWidth" format="dimension"/>
        <attr name="circleColor" format="color"/>
        <attr name="ringColor" format="color"/>
    </declare-styleable>

</resources>

2.自定义MyProgressView.java

package com.czhappy.effectdemo.view;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.FontMetrics;
import android.graphics.Rect;
import android.graphics.RectF;
import android.os.Handler;
import android.os.Message;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;

import com.czhappy.effectdemo.R;
import com.czhappy.effectdemo.utils.ScreenUtil;


public class MyProgressView extends View {

    // 画实心圆的画笔
    private Paint mCirclePaint;
    // 画圆环的画笔
    private Paint mRingDefaultPaint;
    // 已用环的画笔
    private Paint mUsePaint;
    // 画圆环的画笔
    private Paint mRingPaint;
    // 画白线的画笔
    private Paint mLinePaint;
    // 画字体的画笔
    private Paint mTextPaint;
    // 圆形颜色
    private int mCircleColor;
    // 圆环颜色
    private int mRingColor;
    // 半径
    private float mRadius;
    // 圆环半径
    private float mRingRadius;
    // 圆环宽度
    private float mStrokeWidth;
    // 圆心x坐标
    private int mXCenter;
    // 圆心y坐标
    private int mYCenter;
    // 字的长度
    private float mTxtWidth;
    // 字的高度
    private float mTxtHeight;
    // 总进度
    private int mTotalProgress = 100;
    // 当前进度
    private int mProgress;
    // 实际展示总进度
    private int mShowProgress;
    // 已用流量
    private String usedFlow;

    private Context mContext;

    private Handler circleHandler = new Handler(){

        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(msg.what == 1){
                int temp = (Integer)msg.obj;
                setProgress(temp);
            }
        };
    };

    public MyProgressView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        // 获取自定义的属性
        initAttrs(context, attrs);
        initVariable();
    }

    private void initAttrs(Context context, AttributeSet attrs) {
        TypedArray typeArray = context.getTheme().obtainStyledAttributes(attrs,
                R.styleable.TasksCompletedView, 0, 0);
        mRadius = typeArray.getDimension(R.styleable.TasksCompletedView_radius, 80);
        mStrokeWidth = typeArray.getDimension(R.styleable.TasksCompletedView_strokeWidth, 10);
        mCircleColor = typeArray.getColor(R.styleable.TasksCompletedView_circleColor, 0xFFFFFFFF);
        mRingColor = typeArray.getColor(R.styleable.TasksCompletedView_ringColor, 0xFFFFFFFF);

        mRingRadius = mRadius + mStrokeWidth / 2;
    }

    private void initVariable() {
        //画圆画笔设置
        mCirclePaint = new Paint();
        mCirclePaint.setAntiAlias(true);//防锯齿
        mCirclePaint.setColor(mCircleColor);
        mCirclePaint.setStyle(Paint.Style.FILL);

        //“使用”字画笔设置
        mUsePaint = new Paint();
        mUsePaint.setAntiAlias(true);
        mUsePaint.setStyle(Paint.Style.FILL);
        mUsePaint.setColor(getResources().getColor(R.color.ticket_color));
        mUsePaint.setTextSize(ScreenUtil.sp2px(mContext, 10));

        //圆环画笔设置
        mRingDefaultPaint = new Paint();
        mRingDefaultPaint.setAntiAlias(true);
        mRingDefaultPaint.setColor(getResources().getColor(R.color.default_ring_color));
        mRingDefaultPaint.setStyle(Paint.Style.STROKE);
        mRingDefaultPaint.setStrokeWidth(mStrokeWidth);

        //已使用多少圆环画笔设置
        mRingPaint = new Paint();
        mRingPaint.setAntiAlias(true);
        mRingPaint.setColor(mRingColor);
        mRingPaint.setStyle(Paint.Style.STROKE);
        mRingPaint.setStrokeWidth(mStrokeWidth);

        mTextPaint = new Paint();
        mTextPaint.setAntiAlias(true);
        mTextPaint.setStyle(Paint.Style.FILL);
        mTextPaint.setColor(Color.BLACK);
        mTextPaint.setTextSize(ScreenUtil.sp2px(mContext, 22));

        mLinePaint = new Paint();
        mLinePaint.setColor(Color.WHITE);


        //获取字体高度
        FontMetrics fm = mTextPaint.getFontMetrics();
        mTxtHeight = (int) Math.ceil(fm.descent - fm.ascent);

    }

    @Override
    protected void onDraw(Canvas canvas) {

        mXCenter = getWidth() / 2;
        mYCenter = getHeight() / 2;

        //画圆
        canvas.drawCircle(mXCenter, mYCenter, mRadius, mCirclePaint);

        RectF oval = new RectF();
        oval.left = (mXCenter - mRingRadius);
        oval.top = (mYCenter - mRingRadius);
        oval.right = mRingRadius * 2 + (mXCenter - mRingRadius);
        oval.bottom = mRingRadius * 2 + (mYCenter - mRingRadius);
        //画整圆弧
        canvas.drawArc(oval, -90, 360, false, mRingDefaultPaint);
        //已使用多少圆弧
        canvas.drawArc(oval, -90, ((float) mProgress / mTotalProgress) * 360, false, mRingPaint);
        //文字绘制
        String txt = mProgress + "%";
        //文字的长度
        mTxtWidth = mTextPaint.measureText(txt, 0, txt.length());
        canvas.drawText(txt, mXCenter - mTxtWidth / 2, mYCenter + mTxtHeight / 9, mTextPaint);

        Rect _pb = new Rect();
        String sup = "已用";
        mUsePaint.getTextBounds(sup, 0, sup.length(), _pb);
        int perX = mXCenter - _pb.width() / 2;
        canvas.drawText(sup, perX, mYCenter / 2, mUsePaint);

        if (!TextUtils.isEmpty(usedFlow)) {
            mUsePaint.getTextBounds(usedFlow, 0, usedFlow.length(), _pb);
            perX = mXCenter - _pb.width() / 2;
            canvas.drawText(usedFlow, perX, (float) (mYCenter + mYCenter / 1.7), mUsePaint);
        }

        //画横线图片
        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.circle_bottom_bg);
        perX = mXCenter - bitmap.getWidth() / 2;
        canvas.drawBitmap(bitmap, perX, (float) (mYCenter + mYCenter / 5), mLinePaint);
    }

    /**
     * 设置当前进度
     * @param progress
     */
    public void setProgress(int progress) {
        mProgress = progress;
        postInvalidate();
    }

    /**
     * 实际展示总进度
     * @param progress
     */
    public void setmShowProgress(int progress) {
        mShowProgress = progress;
        new Thread(new CircleThread()).start();
    }

    public void setUsedFlow(String usedFlow) {
        this.usedFlow = usedFlow;
    }


    private class CircleThread implements Runnable{

        int m=0;
        int i=0;

        @Override
        public void run() {
            // TODO Auto-generated method stub
            while(!Thread.currentThread().isInterrupted()){
                try {
                    Thread.sleep(50);
                    m++;
                    Message msg = new Message();
                    msg.what = 1;
                    if(i < mShowProgress){
                        i += m;
                    }else{
                        i = mShowProgress;
                        return;
                    }
                    msg.obj = i;
                    circleHandler.sendMessage(msg);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

    }
}

3.FlowActivity.java

package com.czhappy.effectdemo.activity;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

import com.czhappy.effectdemo.R;
import com.czhappy.effectdemo.view.MyProgressView;

/**
 * Description:
 * User: chenzheng
 * Date: 2017/1/21 0021
 * Time: 17:17
 */
public class FlowActivity extends AppCompatActivity {

    private MyProgressView mTasksView;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_flow);

        initView();
    }

    private void initView() {
        mTasksView = (MyProgressView) findViewById(R.id.flow_prgress_view);
    }

    public void beginAnim(View view){
        mTasksView.setUsedFlow("200.0M");
        mTasksView.setmShowProgress(60);
    }
}

4.activity_flow.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tc="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    android:background="#fff"
    android:gravity="center_horizontal"
    android:orientation="vertical">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="beginAnim"
        android:text="开始动画"/>

    <com.czhappy.effectdemo.view.MyProgressView
        android:id="@+id/flow_prgress_view"
        android:layout_width="100dp"
        android:layout_height="100dp"
        tc:circleColor="@color/circle_color"
        tc:radius="44dp"
        tc:ringColor="@color/ring_color"
        tc:strokeWidth="6dp"
        android:layout_marginTop="10dp"/>

</LinearLayout>