Android自定义进度条-带文本(文字进度)的水平进度条(ProgressBar)

/**
* 带文本提示的进度条
*/
public class TextProgressBar extends ProgressBar {
private String text;
private Paint mPaint;

public TextProgressBar(Context context) {
super(context);
initText();
}

public TextProgressBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initText();
}

public TextProgressBar(Context context, AttributeSet attrs) {
super(context, attrs);
initText();
}

@Override
public void setProgress(int progress) {
setText(progress);
super.setProgress(progress);

}

@Override
protected synchronized void onDraw(Canvas canvas) {
super.onDraw(canvas);
Rect rect = new Rect();
this.mPaint.getTextBounds(this.text, 0, this.text.length(), rect);
int x = (getWidth() / 2) - rect.centerX();
int y = (getHeight() / 2) - rect.centerY();
canvas.drawText(this.text, x, y, this.mPaint);
}

// 初始化，画笔
private void initText() {
this.mPaint = new Paint();
this.mPaint.setAntiAlias(true);
this.mPaint.setColor(Color.WHITE);

}

// 设置文字内容
private void setText(int progress) {
int i = (int) ((progress * 1.0f / this.getMax()) * 100);
this.text = String.valueOf(i) + "%";
}
}