Android自定义View实现加载进度条效果

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/**
 * 字体大小
 */
private int mTextSize;
/**
 * 字体颜色
 */
private int mTextColor;
/**
 * 渐变开始的颜色
 */
private int mStartColor;
/**
 * 渐变结束的颜色
 */
private int mEndColor;
/**
 * 进度条的宽
 */
private int mProgressWidth;
/**
 * 进度条的圆角大小
 */
private int mRadius;
/**
 * 默认进度条的颜色
 */
private int mBgColor;
/**
 * 进度条的当前进度
 */
private float mCurrentProgress;
/**
 * 加载的速度
 */
private int mLoadSpeed;

private String mCOntent="0%";
private Rect mBounds;
private Paint mPaint;

public GradientProgressBar(Context context) {
 this(context, null);
}

public GradientProgressBar(Context context, AttributeSet attrs) {
 this(context, attrs, 0);
}

public GradientProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 TypedArray array = context.getTheme().obtainStyledAttributes(attrs, R.styleable.GradientProgressBar, defStyleAttr, 0);
 int count = array.getIndexCount();
 for (int i = 0; i 

private void init(){
 mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
 mPaint.setAntiAlias(true);
 mBounds = new Rect();
 new Thread(new Runnable() {
 @Override
 public void run() {
 while (mCurrentProgress 

@Override
protected void onDraw(Canvas canvas) {
 super.onDraw(canvas);

 /**
 * 设置画笔的属性
 */
 mPaint.setColor(mBgColor);
 mPaint.setStyle(Paint.Style.FILL);

 /**
 * 绘制背景圆角矩形
 */
 canvas.drawRoundRect(0, 0, mProgressWidth, getHeight(), mRadius, mRadius, mPaint);

 /**
 * 设置线性渐变,设置渐变开始的起点坐标和终点坐标，渐变开始和结束的颜色，设置镜像
 * 对于这个方法不太明白的可以google一下，这里不再详细说明
 */
 LinearGradient gradient = new LinearGradient(0, getHeight() / 2, mProgressWidth, getHeight() / 2,
 mStartColor, mEndColor, Shader.TileMode.MIRROR);
 mPaint.setShader(gradient);
 /**
 * 根据进度绘制圆角矩形
 */
 canvas.drawRoundRect(0, 0, mCurrentProgress, getHeight(), mRadius, mRadius, mPaint);

 mPaint.reset();
 mPaint.setAntiAlias(true);
 mPaint.setColor(mTextColor);
 mPaint.setTextSize(mTextSize);

 /**
 * 获取绘制文本所需的矩形大小
 */
 mPaint.getTextBounds(mContent, 0, mContent.length(), mBounds);
 canvas.drawText(mContent, getWidth() / 2 - mBounds.width() / 2, getHeight() / 2 + mBounds.height() / 2, mPaint);
}

public class RoundProgressBar extends View {

 /**
 * 自定义变量
 */
 private int mTextSize;
 private int mTextColor;
 private int mCircleWidth;
 private int mBgColor;
 private int mCurrentColor;
 private int mLoadSpeed;
 private float mCurrentProgress;

 private String mCOntent= "0%";
 private Rect mBounds;
 private Paint mPaint;

 public RoundProgressBar(Context context) {
 this(context, null);
 }

 public RoundProgressBar(Context context, AttributeSet attrs) {
 this(context, attrs, 0);
 }

 public RoundProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 TypedArray array = context.getTheme().obtainStyledAttributes(attrs, R.styleable.RoundProgressBar, defStyleAttr, 0);
 int count = array.getIndexCount();
 for (int i = 0; i 

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