android/support/v4/content/IntentCompat.java

/*
 * Copyright (C) 2011 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.support.v4.content;

import android.content.Intent;
import android.os.Build;

/**
 * Helper for accessing features in {@link android.content.Intent}.
 */
public final class IntentCompat {
    private IntentCompat() {
        /* Hide constructor */
    }

    /**
     * A constant String that is associated with the Intent, used with
     * {@link android.content.Intent#ACTION_SEND} to supply an alternative to
     * {@link android.content.Intent#EXTRA_TEXT}
     * as HTML formatted text.  Note that you <em>must</em> also supply
     * {@link android.content.Intent#EXTRA_TEXT}.
     */
    public static final String EXTRA_HTML_TEXT = "android.intent.extra.HTML_TEXT";

    /**
     * Used as a boolean extra field in {@link android.content.Intent#ACTION_VIEW} intents to
     * indicate that content should immediately be played without any intermediate screens that
     * require additional user input, e.g. a profile selection screen or a details page.
     */
    public static final String EXTRA_START_PLAYBACK = "android.intent.extra.START_PLAYBACK";

    /**
     * Indicates an activity optimized for Leanback mode, and that should
     * be displayed in the Leanback launcher.
     */
    public static final String CATEGORY_LEANBACK_LAUNCHER = "android.intent.category.LEANBACK_LAUNCHER";

    /**
     * Make an Intent for the main activity of an application, without
     * specifying a specific activity to run but giving a selector to find
     * the activity.  This results in a final Intent that is structured
     * the same as when the application is launched from
     * Home.  For anything else that wants to launch an application in the
     * same way, it is important that they use an Intent structured the same
     * way, and can use this function to ensure this is the case.
     *
     * <p>The returned Intent has {@link Intent#ACTION_MAIN} as its action, and includes the
     * category {@link Intent#CATEGORY_LAUNCHER}.  This does <em>not</em> have
     * {@link Intent#FLAG_ACTIVITY_NEW_TASK} set, though typically you will want
     * to do that through {@link Intent#addFlags(int)} on the returned Intent.
     *
     * @param selectorAction The action name of the Intent's selector.
     * @param selectorCategory The name of a category to add to the Intent's
     * selector.
     * @return Returns a newly created Intent that can be used to launch the
     * activity as a main application entry.
     */
    public static Intent makeMainSelectorActivity(String selectorAction,
            String selectorCategory) {
        if (Build.VERSION.SDK_INT >= 15) {
            return Intent.makeMainSelectorActivity(selectorAction, selectorCategory);
        } else {
            // Before api 15 you couldn't set a selector intent.
            // Fall back and just return an intent with the requested action/category,
            // even though it won't be a proper "main" intent.
            Intent intent = new Intent(selectorAction);
            intent.addCategory(selectorCategory);
            return intent;
        }
    }
}