TextProgressBar.java

package dlr.stressrecognition.utils;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.ProgressBar;

/**
 * Utility class for representing Progress Bars in Android
 * 
 * @author Michael Gross
 *
 */
public class TextProgressBar extends ProgressBar {  
    private String text;  
    private Paint textPaint;  
  
    public TextProgressBar(Context context) {  
        super(context);  
        text = "0 %";  
        textPaint = new Paint();  
        textPaint.setColor(Color.BLACK);  
    }  
  
    public TextProgressBar(Context context, AttributeSet attrs) {  
        super(context, attrs);  
        text = "0 %";  
        textPaint = new Paint();  
        textPaint.setColor(Color.BLACK);  
    }  
  
    public TextProgressBar(Context context, AttributeSet attrs, int defStyle) {  
        super(context, attrs, defStyle);  
        text = "0 %"; 
        textPaint = new Paint();  
        textPaint.setColor(Color.BLACK);  
    }  
  
    @Override  
    protected synchronized void onDraw(Canvas canvas) {  
        // First draw the regular progress bar, then custom draw our text  
        super.onDraw(canvas);  
        Rect bounds = new Rect();  
        textPaint.getTextBounds(text, 0, text.length(), bounds);  
        int x = getWidth() / 2 - bounds.centerX();  
        int y = getHeight() / 2 - bounds.centerY();  
        canvas.drawText(text, x, y, textPaint);  
    }  
  
    public synchronized void setText(String text) {  
        this.text = text;  
        drawableStateChanged();  
    }  
  
    public void setTextColor(int color) {  
        textPaint.setColor(color);  
        drawableStateChanged();  
    }  
}