Android自訂進度條-帶文本(文字進度)的水平進度條(ProgressBar)

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/**  * 帶文本提示的進度條  */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，畫筆     private void initText() {         this.mPaint = new Paint();         this.mPaint.setAntiAlias(true);         this.mPaint.setColor(Color.WHITE);       }       // 設定文字內容     private void setText(int progress) {         int i = (int) ((progress * 1.0f / this.getMax()) * 100);         this.text = String.valueOf(i) + "%";     } }