Scale text up
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@ -21,6 +21,10 @@ import android.text.TextPaint;
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import android.util.AttributeSet;
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import android.util.TypedValue;
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import android.widget.TextView;
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import hugo.weaving.DebugLog;
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import static android.util.TypedValue.COMPLEX_UNIT_SP;
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import static android.util.TypedValue.applyDimension;
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/**
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* Text view that auto adjusts text size to fit within the view.
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@ -30,6 +34,7 @@ import android.widget.TextView;
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* @author Chase Colburn
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* @since Apr 4, 2011
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*/
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@DebugLog
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@SuppressWarnings("unused")
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public class AutoResizeTextView extends TextView {
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@ -54,6 +59,7 @@ public class AutoResizeTextView extends TextView {
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// Add ellipsis to text that overflows at the smallest text size
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private boolean mAddEllipsis = true;
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private final TextPaint tmpPaint = new TextPaint();
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private final float mStep;
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// Default constructor override
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public AutoResizeTextView(Context context) {
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@ -69,6 +75,8 @@ public class AutoResizeTextView extends TextView {
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public AutoResizeTextView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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mTextSize = getTextSize();
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mStep = Math.max(2, applyDimension(COMPLEX_UNIT_SP, 1, getResources().getDisplayMetrics()));
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}
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/**
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@ -230,10 +238,24 @@ public class AutoResizeTextView extends TextView {
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// Get the required text height
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int textHeight = getTextHeight(text, textPaint, width, targetTextSize);
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// Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes
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while (textHeight > height && targetTextSize > mMinTextSize) {
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targetTextSize = Math.max(targetTextSize - 2, mMinTextSize);
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textHeight = getTextHeight(text, textPaint, width, targetTextSize);
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if (textHeight > height && targetTextSize > mMinTextSize) {
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// Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes
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while (textHeight > height && targetTextSize > mMinTextSize) {
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targetTextSize = Math.max(targetTextSize - mStep, mMinTextSize);
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textHeight = getTextHeight(text, textPaint, width, targetTextSize);
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}
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} else if (textHeight < height) {
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// Try bigger sizes until we fill the view
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float newTargetTextSize = targetTextSize;
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int newTextHeight = textHeight;
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while (newTextHeight < height) {
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// use last values which don't exceed view dimensions
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targetTextSize = newTargetTextSize;
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textHeight = newTextHeight;
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newTargetTextSize += mStep;
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newTextHeight = getTextHeight(text, textPaint, width, newTargetTextSize);
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}
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}
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// If we had reached our minimum text size and still don't fit, append an ellipsis
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