org.metawidget.android.AndroidUtils Maven / Gradle / Ivy
// Metawidget
//
// This file is dual licensed under both the LGPL
// (http://www.gnu.org/licenses/lgpl-2.1.html) and the EPL
// (http://www.eclipse.org/org/documents/epl-v10.php). As a
// recipient of Metawidget, you may choose to receive it under either
// the LGPL or the EPL.
//
// Commercial licenses are also available. See http://metawidget.org
// for details.
package org.metawidget.android;
import org.metawidget.android.widget.AndroidMetawidget;
import android.R;
import android.content.res.ColorStateList;
import android.content.res.TypedArray;
import android.view.View;
import android.widget.TextView;
/**
* Utilities for working with Android.
*
* @author Richard Kennard, Tomasz Bartczak
*/
public final class AndroidUtils {
//
// Public statics
//
/**
* Applies the given style id (defined in res/values/styles.xml) to the given View.
*/
// It isn't clear in SDK 1.0 R2 how one is meant to generically and programmatically apply
// styles. It seems like the 'new View( Context, AttributeSet, styleId )' constructor would do
// the trick, but how to create the AttributeSet for the styleId? This comment...
//
// http://markmail.org/message/ogskv4frewsxghlp
//
// ...seems to suggest only the container can do this at present, but that this will be enhanced
// in future?
//
public static void applyStyle( View view, int style, AndroidMetawidget metawidget ) {
// No style?
if ( style == 0 ) {
return;
}
// Construct StyledAttributes
TypedArray attributes = metawidget.getContext().obtainStyledAttributes( style, VIEW_ATTRIBUTES );
// Padding
int padding = attributes.getDimensionPixelSize( 0, BOGUS_DEFAULT );
int leftPadding;
int topPadding;
int rightPadding;
int bottomPadding;
if ( padding == BOGUS_DEFAULT ) {
leftPadding = attributes.getDimensionPixelSize( 1, 0 );
topPadding = attributes.getDimensionPixelSize( 2, 0 );
rightPadding = attributes.getDimensionPixelSize( 3, 0 );
bottomPadding = attributes.getDimensionPixelSize( 4, 0 );
} else {
leftPadding = padding;
topPadding = padding;
rightPadding = padding;
bottomPadding = padding;
}
view.setPadding( leftPadding, topPadding, rightPadding, bottomPadding );
if ( view instanceof TextView ) {
attributes = metawidget.getContext().obtainStyledAttributes( style, TEXTVIEW_ATTRIBUTES );
TextView textView = (TextView) view;
// Color
ColorStateList colors = attributes.getColorStateList( 0 );
if ( colors != null ) {
textView.setTextColor( colors );
}
// Gravity
int gravity = attributes.getInteger( 1, BOGUS_DEFAULT );
if ( gravity != BOGUS_DEFAULT ) {
textView.setGravity( gravity );
}
// Size
//
// (Tomasz discovered you have to re-call obtainStyledAttributes here. Why?)
attributes = metawidget.getContext().obtainStyledAttributes( style, TEXTVIEW_ATTRIBUTES_SIZE );
int textSize = attributes.getDimensionPixelSize( 0, BOGUS_DEFAULT );
if ( textSize != BOGUS_DEFAULT ) {
textView.setTextSize( textSize );
}
}
}
//
// Private statics
//
/**
* Array of View style attributes.
*/
private static final int[] VIEW_ATTRIBUTES = new int[] { R.attr.padding, R.attr.paddingLeft, R.attr.paddingTop, R.attr.paddingRight, R.attr.paddingBottom };
/**
* Array of TextView style attributes.
*/
private static final int[] TEXTVIEW_ATTRIBUTES = new int[] { R.attr.textColor, R.attr.gravity };
/**
* For some reason you must call textSize separately to textColor, as discovered by kretes:
* https://sourceforge.net/projects/metawidget/forums/forum/747623/topic/3448466
*/
private static final int[] TEXTVIEW_ATTRIBUTES_SIZE = new int[] { R.attr.textSize };
private static final int BOGUS_DEFAULT = -1;
//
// Private constructor
//
private AndroidUtils() {
// Can never be called
}
}