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POHow to correctly draw text in an extended class for TextView?
 

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  1. POHow to correctly draw text in an extended class for TextView?
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    <p>I'm currently working on extending a TextView, adding an outline around the text. Thus far, the only problem I've been having is my inability to position the "outline" correctly behind a text. If I code the extended class like the one portrayed below, I get a label that looks like this:</p> <p><img src="https://i.stack.imgur.com/xmFtY.png" alt=""></p> <p>Note: in the above screenshot, I set the fill color to white, and the stroke color to black.</p> <p>What am I doing wrong?</p> <pre><code>public class OutlinedTextView extends TextView { /* =========================================================== * Constants * =========================================================== */ private static final float OUTLINE_PROPORTION = 0.1f; /* =========================================================== * Members * =========================================================== */ private final Paint mStrokePaint = new Paint(); private int mOutlineColor = Color.TRANSPARENT; /* =========================================================== * Constructors * =========================================================== */ public OutlinedTextView(Context context) { super(context); this.setupPaint(); } public OutlinedTextView(Context context, AttributeSet attrs) { super(context, attrs); this.setupPaint(); this.setupAttributes(context, attrs); } public OutlinedTextView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); this.setupPaint(); this.setupAttributes(context, attrs); } /* =========================================================== * Overrides * =========================================================== */ @Override protected void onDraw(Canvas canvas) { // Get the text to print final float textSize = super.getTextSize(); final String text = super.getText().toString(); // setup stroke mStrokePaint.setColor(mOutlineColor); mStrokePaint.setStrokeWidth(textSize * OUTLINE_PROPORTION); mStrokePaint.setTextSize(textSize); mStrokePaint.setFlags(super.getPaintFlags()); mStrokePaint.setTypeface(super.getTypeface()); // Figure out the drawing coordinates //mStrokePaint.getTextBounds(text, 0, text.length(), mTextBounds); // draw everything canvas.drawText(text, super.getWidth() * 0.5f, super.getBottom() * 0.5f, mStrokePaint); super.onDraw(canvas); } /* =========================================================== * Private/Protected Methods * =========================================================== */ private final void setupPaint() { mStrokePaint.setAntiAlias(true); mStrokePaint.setStyle(Paint.Style.STROKE); mStrokePaint.setTextAlign(Paint.Align.CENTER); } private final void setupAttributes(Context context, AttributeSet attrs) { final TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.OutlinedTextView); mOutlineColor = array.getColor( R.styleable.OutlinedTextView_outlineColor, 0x00000000); array.recycle(); // Force this text label to be centered super.setGravity(Gravity.CENTER_HORIZONTAL); } } </code></pre>
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    1. COI forgot to mention the current XML layout right now. While I don't have it on me yet, basically I'm attempting to center align the TextView both vertically and horizontally on top of an ImageButton.
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