android仿照IOS AppStore下载进度条

下面有效果图，本人也是在网上搜集进度条之后修改而成，不喜勿喷！

先上效果图



public class TasksCompletedView2 extends View {

// 画最外边圆环的画笔

private Paint mCirclePaint;

// 画圆环的画笔

private Paint mRingPaint;

//矩形画笔

private Paint mRectPaint;

// 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;

// 矩形宽度

private float rectWidth;

// 圆心x坐标

private int mXCenter;

// 圆心y坐标

private int mYCenter;

// 总进度

private int mTotalProgress = 100;

// 当前进度

private int mProgress;

// 最外层圆的宽度

private int mcircleWidth = 6;

public TasksCompletedView2(Context context, AttributeSet attrs) {

super(context, attrs);

// 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);

rectWidth = typeArray.getDimension(R.styleable.TasksCompletedView_myrectWidth, 15);

mRingColor = typeArray.getColor(R.styleable.TasksCompletedView_ringColor, 0xFFFFFFFF);

mRingRadius = mRadius + mStrokeWidth / 2 - mcircleWidth/2;

}

private void initVariable() {

//最外层圆形画笔

mCirclePaint = new Paint();

mCirclePaint.setAntiAlias(true);

mCirclePaint.setColor(mRingColor);

mCirclePaint.setStyle(Paint.Style.STROKE);

mCirclePaint.setStrokeWidth(mcircleWidth);

//动态圆弧画笔

mRingPaint = new Paint();

mRingPaint.setAntiAlias(true);

mRingPaint.setColor(mRingColor);

mRingPaint.setStyle(Paint.Style.STROKE);

//动态弧形的宽度

mRingPaint.setStrokeWidth(mStrokeWidth);

mRectPaint = new Paint();

mRectPaint.setAntiAlias(true);

mRectPaint.setColor(mRingColor);

mRectPaint.setStyle(Paint.Style.FILL);

}

@Override

protected void onDraw(Canvas canvas) {

mXCenter = getWidth() / 2;

mYCenter = getHeight() / 2;

//画出最外层的圆

canvas.drawCircle(mXCenter, mYCenter, mRadius+mcircleWidth, mCirclePaint);

//画出里面的矩形

canvas.drawRect(mXCenter-rectWidth, mYCenter-rectWidth, mXCenter+rectWidth, mYCenter+rectWidth, mRectPaint);

//动态画圆环

if (mProgress > 0 ) {

RectF oval = new RectF();

oval.left = (mXCenter - mRingRadius);

oval.top = (mYCenter - mRingRadius);

oval.right = mRingRadius * 2 + (mXCenter - mRingRadius);

oval.bottom = mRingRadius * 2 + (mYCenter - mRingRadius);

canvas.drawArc(oval, -90, ((float)mProgress / mTotalProgress) * 360, false, mRingPaint); //

}

}

public void setProgress(int progress) {

mProgress = progress;

postInvalidate();

}

}

在values下新建一个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="myrectWidth" format="dimension"/>

<attr name="circleColor" format="color"/>

<attr name="ringColor" format="color"/>

</declare-styleable>



</resources>

这样就完成了，如果要使用在layout中这样就可

<com.snailws.taskscompleted.activity.TasksCompletedView2

android:id="@+id/tasks_view"

android:layout_width="55dp"

android:layout_height="55dp"

tc:radius="20dip"

tc:strokeWidth="5dip"

tc:myrectWidth="8dip"

tc:ringColor="@color/ring_color" />

最后主要有一些自定义属性没有用，可以自行修改，本人技术太菜，项目赶进度所以匆匆记录一下