public class CustomProgressBar extends View {
/**第一圈的颜色*/
private int mFirstColor = Color.GREEN;
/**第二圈的颜色*/
private int mSecondColor = Color.RED;
/**圈的宽度*/
private int mCircleWidth = 40;
/**当前进度*/
private int mProgress = 0;
/**速度。实际代表的是休眠时间，这里只是为了方便演示*/
private int mSpeed = 30;
/**进度的百分比形式*/
private String percent = "0%";
/**绘制时文本绘制的范围*/
private Rect mRect = null;
/**绘制时文本的大小*/
private int sTextSize = 40;
/**绘制时文本的颜色*/
private int sTextColor = Color.BLACK;
/**画笔*/
private Paint mPaint = null;
/**是否应该开始下一个*/
private boolean isToNext = false;
/**用于定义圆弧的形状和大小的界限*/
private RectF oval;
private OnComompleteListener mListener;
public CustomProgressBar(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CustomProgressBar(Context context) {
this(context, null);
}
public CustomProgressBar(final Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mRect = new Rect();
mPaint = new Paint();
oval = new RectF();
TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CustomProgressBar, defStyle, 0);
for (int i = 0; i < typedArray.getIndexCount(); i++) {
int attr = typedArray.getIndex(i);
switch (attr) {
case R.styleable.CustomProgressBar_firstColor:
mFirstColor = typedArray.getColor(attr, Color.GREEN);
break;
case R.styleable.CustomProgressBar_secondColor:
mSecondColor = typedArray.getColor(attr, Color.RED);
break;
case R.styleable.CustomProgressBar_circleWidth:
mCircleWidth = typedArray.getDimensionPixelSize(attr,
(int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 20, getResources().getDisplayMetrics()));
break;
case R.styleable.CustomProgressBar_speed:
mSpeed = typedArray.getInt(attr, 20);
break;
}
}
typedArray.recycle();
// 绘图线程
new Thread() {
public void run() {
while (true) {
mProgress++;
if (mProgress == 360) {
if (mListener != null && context instanceof Activity) {
((Activity) context).runOnUiThread(new Runnable() {//Activity拿到回调时，不能直接在子线程中更新UI
@Override
public void run() {
mListener.onComplete(CustomProgressBar.this, isToNext);
}
});
}
mProgress = 0;
percent = "100%";
if (!isToNext) {//如果不继续转的话就停止
mPaint.getTextBounds(percent, 0, percent.length(), mRect);
postInvalidate();//要刷新一下，否则最后的状态可能没绘制上
return;
}
} else if (mProgress % 10 == 0) {//每10个进度刷新一次，目的是防止频繁的更新进度。实际项目中不需要考虑！
percent = mProgress * 100 / 360 + "%";
}
mPaint.getTextBounds(percent, 0, percent.length(), mRect);//将初始文本的边界值封装到矩形mRect中
postInvalidate();
try {
Thread.sleep(mSpeed);
} catch (InterruptedException e) {
}
}
};
}.start();
}
@Override
protected void onDraw(Canvas canvas) {
mPaint.setAntiAlias(true); // 消除锯齿
mPaint.setStyle(Paint.Style.STROKE); //空心
mPaint.setStrokeWidth(mCircleWidth); // 设置圆环的宽度
int centre = getWidth() / 2; // 获取圆心的x坐标
int radius = centre - mCircleWidth / 2;// 半径
oval = new RectF(centre - radius, centre - radius, centre + radius, centre + radius); // 用于定义的圆弧的形状和大小的界限
if (!isToNext) {// 第一颜色的圈完整，第二颜色跑
mPaint.setColor(mFirstColor); // 设置圆环的颜色
canvas.drawCircle(centre, centre, radius, mPaint); // 画出圆环
mPaint.setColor(mSecondColor); // 设置圆环的颜色
canvas.drawArc(oval, -90, mProgress, false, mPaint); // 根据进度画圆弧
} else {
mPaint.setColor(mSecondColor); // 设置圆环的颜色
canvas.drawCircle(centre, centre, radius, mPaint); // 画出圆环
mPaint.setColor(mFirstColor); // 设置圆环的颜色
canvas.drawArc(oval, -90, mProgress, false, mPaint); // 根据进度画圆弧
}
//再绘制一个知识当前进度的文字，先包装文字的范围，再根据此大小调整文字的位置
mPaint.setStyle(Paint.Style.FILL);
mPaint.setTextSize(sTextSize);
mPaint.setColor(sTextColor);
canvas.drawText(percent, centre - mRect.width() / 2, centre + mRect.height() / 2, mPaint);
}
public boolean isToNext() {
return isToNext;
}
public void setToNext(boolean isToNext) {
this.isToNext = isToNext;
}
//自定义的回调
public interface OnComompleteListener {
public void onComplete(CustomProgressBar pb, boolean isToNext);
}
public void setOnComompleteListener(OnComompleteListener listener) {
mListener = listener;
}
}