com.vokal.async_image_cache.UIUtils.java Source code

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Here is the source code for com.vokal.async_image_cache.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 com.vokal.async_image_cache;

import android.annotation.TargetApi;
import android.content.*;
import android.content.res.Configuration;
import android.graphics.Color;
import android.os.Build;
import android.support.v4.app.FragmentActivity;
import android.text.Html;
import android.text.TextUtils;
import android.text.method.LinkMovementMethod;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import java.util.Calendar;
import java.util.TimeZone;

/**
 * An assortment of UI helpers.
 */
public class UIUtils {
    /**
     * Time zone to use when formatting times. To always use the
     * phone local time, use {@link TimeZone#getDefault()}.
     */
    public static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getTimeZone("America/Chicago");

    private static final int SECOND_MILLIS = 1000;
    private static final int MINUTE_MILLIS = 60 * SECOND_MILLIS;
    private static final int HOUR_MILLIS = 60 * MINUTE_MILLIS;
    private static final int DAY_MILLIS = 24 * HOUR_MILLIS;

    public static boolean isSameDay(long time1, long time2) {
        TimeZone.setDefault(DEFAULT_TIME_ZONE);

        Calendar cal1 = Calendar.getInstance();
        Calendar cal2 = Calendar.getInstance();
        cal1.setTimeInMillis(time1);
        cal2.setTimeInMillis(time2);
        return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
                && cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR);
    }

    public static String getTimeAgo(long time) {
        if (time < 1000000000000L) {
            // if timestamp given in seconds, convert to millis
            time *= 1000;
        }

        long now = System.currentTimeMillis();
        if (time > now || time <= 0) {
            return null;
        }

        // TODO: localize
        final long diff = now - time;
        if (diff < MINUTE_MILLIS) {
            return "just now";
        } else if (diff < 2 * MINUTE_MILLIS) {
            return "a minute ago";
        } else if (diff < 50 * MINUTE_MILLIS) {
            return diff / MINUTE_MILLIS + " minutes ago";
        } else if (diff < 90 * MINUTE_MILLIS) {
            return "an hour ago";
        } else if (diff < 24 * HOUR_MILLIS) {
            return diff / HOUR_MILLIS + " hours ago";
        } else if (diff < 48 * HOUR_MILLIS) {
            return "yesterday";
        } else {
            return diff / DAY_MILLIS + " days ago";
        }
    }

    /**
     * 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(">")) {
            view.setText(Html.fromHtml(text));
            view.setMovementMethod(LinkMovementMethod.getInstance());
        } else {
            view.setText(text);
        }
    }

    public static ImageFetcher getImageFetcher(final FragmentActivity activity) {
        // The ImageFetcher takes care of loading remote images into our ImageView
        ImageFetcher fetcher = new ImageFetcher(activity);
        fetcher.addImageCache(activity);
        return fetcher;
    }

    private static final int BRIGHTNESS_THRESHOLD = 130;

    /**
     * Calculate whether a color is light or dark, based on a commonly known
     * brightness formula.
     *
     * @see {@literal http://en.wikipedia.org/wiki/HSV_color_space%23Lightness}
     */
    public static boolean isColorDark(int color) {
        return ((30 * Color.red(color) + 59 * Color.green(color) + 11 * Color.blue(color))
                / 100) <= BRIGHTNESS_THRESHOLD;
    }

    public static void safeOpenLink(Context context, Intent linkIntent) {
        try {
            context.startActivity(linkIntent);
        } catch (ActivityNotFoundException e) {
            Toast.makeText(context, "Couldn't open link", Toast.LENGTH_SHORT).show();
        }
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static void setActivatedCompat(View view, boolean activated) {
        if (hasHoneycomb()) {
            view.setActivated(activated);
        }
    }

    public static boolean isGoogleTV(Context context) {
        return context.getPackageManager().hasSystemFeature("com.google.android.tv");
    }

    public static boolean hasFroyo() {
        // Can use static final constants like FROYO, declared in later versions
        // of the OS since they are inlined at compile time. This is guaranteed behavior.
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
    }

    public static boolean hasGingerbread() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD;
    }

    public static boolean hasHoneycomb() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
    }

    public static boolean hasHoneycombMR1() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1;
    }

    public static boolean hasICS() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;
    }

    public static boolean hasJellyBean() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
    }

    public static boolean isTablet(Context context) {
        return (context.getResources().getConfiguration().screenLayout
                & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE;
    }

    public static boolean isHoneycombTablet(Context context) {
        return hasHoneycomb() && isTablet(context);
    }
}