File	Doc	Category	Size	Date	Package
LabelView.java	API Doc	Android 1.5 API	6095	Wed May 06 22:41:08 BST 2009	com.example.android.apis.view

LabelView

• java.lang.Object
  • android.view.View

Fields Summary
private android.graphics.Paint	mTextPaint
private String	mText
private int	mAscent

Constructors Summary
public LabelView(android.content.Context context) Constructor. This version is only needed if you will be instantiating the object manually (not from a layout XML file). param context super(context); initLabelView();
public LabelView(android.content.Context context, android.util.AttributeSet attrs) Construct object, initializing with any attributes we understand from a layout file. These attributes are defined in SDK/assets/res/any/classes.xml. see android.view.View#View(android.content.Context, android.util.AttributeSet) super(context, attrs); initLabelView(); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.LabelView); CharSequence s = a.getString(R.styleable.LabelView_text); if (s != null) { setText(s.toString()); } // Retrieve the color(s) to be used for this view and apply them. // Note, if you only care about supporting a single color, that you // can instead call a.getColor() and pass that to setTextColor(). setTextColor(a.getColor(R.styleable.LabelView_textColor, 0xFF000000)); int textSize = a.getDimensionPixelOffset(R.styleable.LabelView_textSize, 0); if (textSize > 0) { setTextSize(textSize); } a.recycle();

Methods Summary
private final void	initLabelView() mTextPaint = new Paint(); mTextPaint.setAntiAlias(true); mTextPaint.setTextSize(16); mTextPaint.setColor(0xFF000000); setPadding(3, 3, 3, 3);
private int	measureHeight(int measureSpec) Determines the height of this view param measureSpec A measureSpec packed into an int return The height of the view, honoring constraints from measureSpec int result = 0; int specMode = MeasureSpec.getMode(measureSpec); int specSize = MeasureSpec.getSize(measureSpec); mAscent = (int) mTextPaint.ascent(); if (specMode == MeasureSpec.EXACTLY) { // We were told how big to be result = specSize; } else { // Measure the text (beware: ascent is a negative number) result = (int) (-mAscent + mTextPaint.descent()) + getPaddingTop() + getPaddingBottom(); if (specMode == MeasureSpec.AT_MOST) { // Respect AT_MOST value if that was what is called for by measureSpec result = Math.min(result, specSize); } } return result;
private int	measureWidth(int measureSpec) Determines the width of this view param measureSpec A measureSpec packed into an int return The width of the view, honoring constraints from measureSpec int result = 0; int specMode = MeasureSpec.getMode(measureSpec); int specSize = MeasureSpec.getSize(measureSpec); if (specMode == MeasureSpec.EXACTLY) { // We were told how big to be result = specSize; } else { // Measure the text result = (int) mTextPaint.measureText(mText) + getPaddingLeft() + getPaddingRight(); if (specMode == MeasureSpec.AT_MOST) { // Respect AT_MOST value if that was what is called for by measureSpec result = Math.min(result, specSize); } } return result;
protected void	onDraw(android.graphics.Canvas canvas) Render the text see android.view.View#onDraw(android.graphics.Canvas) super.onDraw(canvas); canvas.drawText(mText, getPaddingLeft(), getPaddingTop() - mAscent, mTextPaint);
protected void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) see android.view.View#measure(int, int) setMeasuredDimension(measureWidth(widthMeasureSpec), measureHeight(heightMeasureSpec));
public void	setText(java.lang.String text) Sets the text to display in this label param text The text to display. This will be drawn as one line. mText = text; requestLayout(); invalidate();
public void	setTextColor(int color) Sets the text color for this label. param color ARGB value for the text mTextPaint.setColor(color); invalidate();
public void	setTextSize(int size) Sets the text size for this label param size Font size mTextPaint.setTextSize(size); requestLayout(); invalidate();