| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * 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 android.media; |
| |
| import android.graphics.Bitmap; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.util.Log; |
| |
| /** |
| * A class to encapsulate rating information used as content metadata. |
| * A rating is defined by its rating style (see {@link #RATING_HEART}, |
| * {@link #RATING_THUMB_UP_DOWN}, {@link #RATING_3_STARS}, {@link #RATING_4_STARS}, |
| * {@link #RATING_5_STARS} or {@link #RATING_PERCENTAGE}) and the actual rating value (which may |
| * be defined as "unrated"), both of which are defined when the rating instance is constructed |
| * through one of the factory methods. |
| */ |
| public final class Rating implements Parcelable { |
| |
| private final static String TAG = "Rating"; |
| |
| /** |
| * A rating style with a single degree of rating, "heart" vs "no heart". Can be used to |
| * indicate the content referred to is a favorite (or not). |
| */ |
| public final static int RATING_HEART = 1; |
| |
| /** |
| * A rating style for "thumb up" vs "thumb down". |
| */ |
| public final static int RATING_THUMB_UP_DOWN = 2; |
| |
| /** |
| * A rating style with 0 to 3 stars. |
| */ |
| public final static int RATING_3_STARS = 3; |
| |
| /** |
| * A rating style with 0 to 4 stars. |
| */ |
| public final static int RATING_4_STARS = 4; |
| |
| /** |
| * A rating style with 0 to 5 stars. |
| */ |
| public final static int RATING_5_STARS = 5; |
| |
| /** |
| * A rating style expressed as a percentage. |
| */ |
| public final static int RATING_PERCENTAGE = 6; |
| |
| private final static float RATING_NOT_RATED = -1.0f; |
| |
| private final int mRatingStyle; |
| |
| private final float mRatingValue; |
| |
| private Rating(int ratingStyle, float rating) { |
| mRatingStyle = ratingStyle; |
| mRatingValue = rating; |
| } |
| |
| |
| /** |
| * @hide |
| */ |
| @Override |
| public String toString () { |
| return "Rating:style=" + mRatingStyle + " rating=" |
| + (mRatingValue < 0.0f ? "unrated" : String.valueOf(mRatingValue)); |
| } |
| |
| @Override |
| public int describeContents() { |
| return mRatingStyle; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel dest, int flags) { |
| dest.writeInt(mRatingStyle); |
| dest.writeFloat(mRatingValue); |
| } |
| |
| public static final Parcelable.Creator<Rating> CREATOR |
| = new Parcelable.Creator<Rating>() { |
| /** |
| * Rebuilds a Rating previously stored with writeToParcel(). |
| * @param p Parcel object to read the Rating from |
| * @return a new Rating created from the data in the parcel |
| */ |
| public Rating createFromParcel(Parcel p) { |
| return new Rating(p.readInt(), p.readFloat()); |
| } |
| public Rating[] newArray(int size) { |
| return new Rating[size]; |
| } |
| }; |
| |
| /** |
| * Return a Rating instance with no rating. |
| * Create and return a new Rating instance with no rating known for the given |
| * rating style. |
| * @param ratingStyle one of {@link #RATING_HEART}, {@link #RATING_THUMB_UP_DOWN}, |
| * {@link #RATING_3_STARS}, {@link #RATING_4_STARS}, {@link #RATING_5_STARS}, |
| * or {@link #RATING_PERCENTAGE}. |
| * @return null if an invalid rating style is passed, a new Rating instance otherwise. |
| */ |
| public static Rating newUnratedRating(int ratingStyle) { |
| switch(ratingStyle) { |
| case RATING_HEART: |
| case RATING_THUMB_UP_DOWN: |
| case RATING_3_STARS: |
| case RATING_4_STARS: |
| case RATING_5_STARS: |
| case RATING_PERCENTAGE: |
| return new Rating(ratingStyle, RATING_NOT_RATED); |
| default: |
| return null; |
| } |
| } |
| |
| /** |
| * Return a Rating instance with a heart-based rating. |
| * Create and return a new Rating instance with a rating style of {@link #RATING_HEART}, |
| * and a heart-based rating. |
| * @param hasHeart true for a "heart selected" rating, false for "heart unselected". |
| * @return a new Rating instance. |
| */ |
| public static Rating newHeartRating(boolean hasHeart) { |
| return new Rating(RATING_HEART, hasHeart ? 1.0f : 0.0f); |
| } |
| |
| /** |
| * Return a Rating instance with a thumb-based rating. |
| * Create and return a new Rating instance with a {@link #RATING_THUMB_UP_DOWN} |
| * rating style, and a "thumb up" or "thumb down" rating. |
| * @param thumbIsUp true for a "thumb up" rating, false for "thumb down". |
| * @return a new Rating instance. |
| */ |
| public static Rating newThumbRating(boolean thumbIsUp) { |
| return new Rating(RATING_THUMB_UP_DOWN, thumbIsUp ? 1.0f : 0.0f); |
| } |
| |
| /** |
| * Return a Rating instance with a star-based rating. |
| * Create and return a new Rating instance with one of the star-base rating styles |
| * and the given integer or fractional number of stars. Non integer values can for instance |
| * be used to represent an average rating value, which might not be an integer number of stars. |
| * @param starRatingStyle one of {@link #RATING_3_STARS}, {@link #RATING_4_STARS}, |
| * {@link #RATING_5_STARS}. |
| * @param starRating a number ranging from 0.0f to 3.0f, 4.0f or 5.0f according to |
| * the rating style. |
| * @return null if the rating style is invalid, or the rating is out of range, |
| * a new Rating instance otherwise. |
| */ |
| public static Rating newStarRating(int starRatingStyle, float starRating) { |
| float maxRating = -1.0f; |
| switch(starRatingStyle) { |
| case RATING_3_STARS: |
| maxRating = 3.0f; |
| break; |
| case RATING_4_STARS: |
| maxRating = 4.0f; |
| break; |
| case RATING_5_STARS: |
| maxRating = 5.0f; |
| break; |
| default: |
| Log.e(TAG, "Invalid rating style (" + starRatingStyle + ") for a star rating"); |
| return null; |
| } |
| if ((starRating < 0.0f) || (starRating > maxRating)) { |
| Log.e(TAG, "Trying to set out of range star-based rating"); |
| return null; |
| } |
| return new Rating(starRatingStyle, starRating); |
| } |
| |
| /** |
| * Return a Rating instance with a percentage-based rating. |
| * Create and return a new Rating instance with a {@link #RATING_PERCENTAGE} |
| * rating style, and a rating of the given percentage. |
| * @param percent the value of the rating |
| * @return null if the rating is out of range, a new Rating instance otherwise. |
| */ |
| public static Rating newPercentageRating(float percent) { |
| if ((percent < 0.0f) || (percent > 100.0f)) { |
| Log.e(TAG, "Invalid percentage-based rating value"); |
| return null; |
| } else { |
| return new Rating(RATING_PERCENTAGE, percent); |
| } |
| } |
| |
| /** |
| * Return whether there is a rating value available. |
| * @return true if the instance was not created with {@link #newUnratedRating(int)}. |
| */ |
| public boolean isRated() { |
| return mRatingValue >= 0.0f; |
| } |
| |
| /** |
| * Return the rating style. |
| * @return one of {@link #RATING_HEART}, {@link #RATING_THUMB_UP_DOWN}, |
| * {@link #RATING_3_STARS}, {@link #RATING_4_STARS}, {@link #RATING_5_STARS}, |
| * or {@link #RATING_PERCENTAGE}. |
| */ |
| public int getRatingStyle() { |
| return mRatingStyle; |
| } |
| |
| /** |
| * Return whether the rating is "heart selected". |
| * @return true if the rating is "heart selected", false if the rating is "heart unselected", |
| * if the rating style is not {@link #RATING_HEART} or if it is unrated. |
| */ |
| public boolean hasHeart() { |
| if (mRatingStyle != RATING_HEART) { |
| return false; |
| } else { |
| return (mRatingValue == 1.0f); |
| } |
| } |
| |
| /** |
| * Return whether the rating is "thumb up". |
| * @return true if the rating is "thumb up", false if the rating is "thumb down", |
| * if the rating style is not {@link #RATING_THUMB_UP_DOWN} or if it is unrated. |
| */ |
| public boolean isThumbUp() { |
| if (mRatingStyle != RATING_THUMB_UP_DOWN) { |
| return false; |
| } else { |
| return (mRatingValue == 1.0f); |
| } |
| } |
| |
| /** |
| * Return the star-based rating value. |
| * @return a rating value greater or equal to 0.0f, or a negative value if the rating style is |
| * not star-based, or if it is unrated. |
| */ |
| public float getStarRating() { |
| switch (mRatingStyle) { |
| case RATING_3_STARS: |
| case RATING_4_STARS: |
| case RATING_5_STARS: |
| if (isRated()) { |
| return mRatingValue; |
| } |
| default: |
| return -1.0f; |
| } |
| } |
| |
| /** |
| * Return the percentage-based rating value. |
| * @return a rating value greater or equal to 0.0f, or a negative value if the rating style is |
| * not percentage-based, or if it is unrated. |
| */ |
| public float getPercentRating() { |
| if ((mRatingStyle != RATING_PERCENTAGE) || !isRated()) { |
| return -1.0f; |
| } else { |
| return mRatingValue; |
| } |
| } |
| } |