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lucasr/StaticLayoutWithMaxLines.java

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Revisions

  1. lucasr revised this gist May 8, 2014. 1 changed file with 0 additions and 1 deletion.
    1 change: 0 additions & 1 deletion StaticLayoutWithMaxLines.java
    View file
    Original file line number Diff line number Diff line change
    @@ -62,7 +62,6 @@ public static synchronized void ensureInitialized() {
    // Make the StaticLayout constructor with max lines public
    sConstructor = StaticLayout.class.getDeclaredConstructor(signature);
    sConstructor.setAccessible(true);

    sConstructorArgs = new Object[signature.length];
    } catch (NoSuchMethodException e) {
    Log.e(LOGTAG, "StaticLayout constructor with max lines not found.", e);
  2. lucasr renamed this gist May 8, 2014. 1 changed file with 0 additions and 0 deletions.
    0 StaticLayoutWithMaxLines → StaticLayoutWithMaxLines.java
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    File renamed without changes.
  3. lucasr created this gist May 8, 2014.
    116 changes: 116 additions & 0 deletions StaticLayoutWithMaxLines
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,116 @@
    package org.lucasr.layoutsamples.canvas;

    import android.os.Build;
    import android.text.Layout.Alignment;
    import android.text.StaticLayout;
    import android.text.TextDirectionHeuristic;
    import android.text.TextDirectionHeuristics;
    import android.text.TextPaint;
    import android.text.TextUtils.TruncateAt;
    import android.util.Log;

    import java.lang.reflect.Constructor;

    public class StaticLayoutWithMaxLines {
    private static final String LOGTAG = "StaticLayoutWithMaxLines";

    private static final String TEXT_DIR_CLASS = "android.text.TextDirectionHeuristic";
    private static final String TEXT_DIRS_CLASS = "android.text.TextDirectionHeuristics";
    private static final String TEXT_DIR_FIRSTSTRONG_LTR = "FIRSTSTRONG_LTR";

    private static boolean sInitialized;

    private static Constructor<StaticLayout> sConstructor;
    private static Object[] sConstructorArgs;
    private static Object sTextDirection;

    public static synchronized void ensureInitialized() {
    if (sInitialized) {
    return;
    }

    try {
    final Class<?> textDirClass;
    if (Build.VERSION.SDK_INT >= 18) {
    textDirClass = TextDirectionHeuristic.class;
    sTextDirection = TextDirectionHeuristics.FIRSTSTRONG_LTR;
    } else {
    final ClassLoader loader = StaticLayoutWithMaxLines.class.getClassLoader();
    textDirClass = loader.loadClass(TEXT_DIR_CLASS);

    final Class<?> textDirsClass = loader.loadClass(TEXT_DIRS_CLASS);
    sTextDirection = textDirsClass.getField(TEXT_DIR_FIRSTSTRONG_LTR)
    .get(textDirsClass);
    }

    final Class<?>[] signature = new Class[] {
    CharSequence.class,
    int.class,
    int.class,
    TextPaint.class,
    int.class,
    Alignment.class,
    textDirClass,
    float.class,
    float.class,
    boolean.class,
    TruncateAt.class,
    int.class,
    int.class
    };

    // Make the StaticLayout constructor with max lines public
    sConstructor = StaticLayout.class.getDeclaredConstructor(signature);
    sConstructor.setAccessible(true);

    sConstructorArgs = new Object[signature.length];
    } catch (NoSuchMethodException e) {
    Log.e(LOGTAG, "StaticLayout constructor with max lines not found.", e);
    } catch (ClassNotFoundException e) {
    Log.e(LOGTAG, "TextDirectionHeuristic class not found.", e);
    } catch (NoSuchFieldException e) {
    Log.e(LOGTAG, "TextDirectionHeuristics.FIRSTSTRONG_LTR not found.", e);
    } catch (IllegalAccessException e) {
    Log.e(LOGTAG, "TextDirectionHeuristics.FIRSTSTRONG_LTR not accessible.", e);
    } finally {
    sInitialized = true;
    }
    }

    public static boolean isSupported() {
    if (Build.VERSION.SDK_INT < 14) {
    return false;
    }

    ensureInitialized();
    return (sConstructor != null);
    }

    public static synchronized StaticLayout create(CharSequence source, int bufstart, int bufend,
    TextPaint paint, int outerWidth, Alignment align,
    float spacingMult, float spacingAdd,
    boolean includePad, TruncateAt ellipsize,
    int ellipsisWidth, int maxLines) {
    ensureInitialized();

    try {
    sConstructorArgs[0] = source;
    sConstructorArgs[1] = bufstart;
    sConstructorArgs[2] = bufend;
    sConstructorArgs[3] = paint;
    sConstructorArgs[4] = outerWidth;
    sConstructorArgs[5] = align;
    sConstructorArgs[6] = sTextDirection;
    sConstructorArgs[7] = spacingMult;
    sConstructorArgs[8] = spacingAdd;
    sConstructorArgs[9] = includePad;
    sConstructorArgs[10] = ellipsize;
    sConstructorArgs[11] = ellipsisWidth;
    sConstructorArgs[12] = maxLines;

    return sConstructor.newInstance(sConstructorArgs);
    } catch (Exception e) {
    throw new IllegalStateException("Error creating StaticLayout with max lines: " + e);
    }
    }
    }