Android自定义view绘制圆环占比动画

本文实例为大家分享了Android自定义view绘制圆环占比动画的具体代码，供大家参考，具体内容如下

一、实现效果图

二、核心代码

1.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();
  }
  }
 }

 }
}

2.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);
 }
}

3.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>

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