Android自定义view绘制圆环占比动画

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();    }   }  } }}

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); }}

<?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>