de.dala.simplenews.utilities.UIUtils.java Source code

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Here is the source code for de.dala.simplenews.utilities.UIUtils.java

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/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.dala.simplenews.utilities;

import android.content.res.ColorStateList;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.os.Build;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.text.Html;
import android.text.TextUtils;
import android.text.method.LinkMovementMethod;
import android.util.Log;
import android.view.View;
import android.webkit.URLUtil;
import android.widget.TextView;

import org.xmlpull.v1.XmlPullParserException;

import java.io.IOException;
import java.util.regex.Pattern;

import de.dala.simplenews.common.Category;
import de.dala.simplenews.common.News;
import de.dala.simplenews.parser.XmlParser;

/**
 * Created by Daniel on 29.12.13.
 */
public class UIUtils {

    /**
     * Regex to search for HTML escape sequences.
     * <p/>
     * <p></p>Searches for any continuous string of characters starting with an ampersand and ending with a
     * semicolon. (Example: &amp;amp;)
     */
    private static final Pattern REGEX_HTML_ESCAPE = Pattern.compile(".*&\\S;.*");

    private static final Pattern VALID_URL = Pattern.compile(
            "/((([A-Za-z]{3,9}:(?://)?)(?:[-;:&=\\+\\$,\\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\\+\\$,\\w]+@)[A-Za-z0-9.-]+)((?:/[\\+~%/]*)?\\??(?:[-\\+=&;%@.\\w_]*)#?(?:[\\w]*))?)/");

    public static boolean isValideUrl(String url) {
        return URLUtil.isValidUrl(url);
    }

    public static void setBackground(View view, Drawable drawable) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            view.setBackground(drawable);
        } else {
            view.setBackgroundDrawable(drawable);
        }
    }

    /**
     * Populate the given {@link TextView} with the requested text, formatting
     * through {@link Html#fromHtml(String)} when applicable. Also sets
     * {@link TextView#setMovementMethod} so inline links are handled.
     */
    public static void setTextMaybeHtml(TextView view, String text) {
        if (TextUtils.isEmpty(text)) {
            view.setText("");
            return;
        }
        if ((text.contains("<") && text.contains(">")) || REGEX_HTML_ESCAPE.matcher(text).find()) {
            view.setText(Html.fromHtml(text));
            view.setMovementMethod(LinkMovementMethod.getInstance());
        } else {
            view.setText(text);
        }
    }

    @SuppressWarnings("unchecked") // Casts are checked using runtime methods
    public static <T> T getParent(Fragment frag, Class<T> callbackInterface) {
        Fragment parentFragment = frag.getParentFragment();
        if (parentFragment != null && callbackInterface.isInstance(parentFragment)) {
            return (T) parentFragment;
        } else {
            FragmentActivity activity = frag.getActivity();
            if (activity != null && callbackInterface.isInstance(activity)) {
                return (T) activity;
            }
        }
        return null;
    }

    public static StateListDrawable getStateListDrawableByColor(int color) {
        Drawable colorDrawable = new ColorDrawable(color);
        return getStateListDrawableByColorDrawable(colorDrawable);

    }

    public static StateListDrawable getStateListDrawableByColorDrawable(Drawable colorDrawable) {
        StateListDrawable stateList = new StateListDrawable();
        stateList.addState(new int[] { android.R.attr.state_pressed }, colorDrawable);
        stateList.addState(new int[] { android.R.attr.state_focused }, colorDrawable);
        stateList.addState(new int[] { android.R.attr.state_checked }, colorDrawable);
        stateList.addState(new int[] { android.R.attr.state_selected }, colorDrawable);
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.GINGERBREAD_MR1) {
            stateList.addState(new int[] { android.R.attr.state_activated }, colorDrawable);
        }
        stateList.addState(new int[] {}, new ColorDrawable(Color.WHITE));
        return stateList;
    }

    public static ColorStateList getColorTextStateList() {
        ColorStateList colorStateList;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.GINGERBREAD_MR1) {
            colorStateList = new ColorStateList(new int[][] { new int[] { android.R.attr.state_pressed },
                    new int[] { android.R.attr.state_focused }, new int[] { android.R.attr.state_activated },
                    new int[] { android.R.attr.state_selected }, new int[] {} },
                    new int[] { Color.WHITE, Color.WHITE, Color.WHITE, Color.WHITE, Color.BLACK });
        } else {
            colorStateList = new ColorStateList(new int[][] { new int[] { android.R.attr.state_pressed },
                    new int[] { android.R.attr.state_focused }, new int[] { android.R.attr.state_selected },
                    new int[] {} }, new int[] { Color.WHITE, Color.WHITE, Color.WHITE, Color.BLACK });
        }
        return colorStateList;
    }
}