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 

 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); } }