UIUtils.java

package org.starfishrespect.myconsumption.android.util;

import android.content.ComponentName;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.view.View;

import static org.starfishrespect.myconsumption.android.util.LogUtils.LOGE;
import static org.starfishrespect.myconsumption.android.util.LogUtils.makeLogTag;

/**
 * An assortment of UI helpers.
 * S23Y (2015). Licensed under the Apache License, Version 2.0.
 * Adapted from Google I/O 2014 Android app by Thibaud Ledent
 */
public class UIUtils {
    private static final String TAG = makeLogTag(UIUtils.class);

    public static final String TARGET_FORM_FACTOR_ACTIVITY_METADATA =
            "org.starfishrespect.myconsumption.android.meta.TARGET_FORM_FACTOR";

    public static final String TARGET_FORM_FACTOR_HANDSET = "handset";
    public static final String TARGET_FORM_FACTOR_TABLET = "tablet";

    public static boolean isTablet(Context context) {
        return context.getResources().getConfiguration().smallestScreenWidthDp >= 600;
    }

    public static void setAccessibilityIgnore(View view) {
        view.setClickable(false);
        view.setFocusable(false);
        view.setContentDescription("");
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            view.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO);
        }
    }

    /**
     * Enables and disables {@linkplain android.app.Activity activities} based on their
     *  meta-data and the current device.
     * Values should be either "handset", "tablet", or not present (meaning universal).
     * <p>
     * <a href="http://stackoverflow.com/questions/13202805">Original code</a> by Dandre Allison.
     * @param context the current context of the device
     */
    public static void enableDisableActivitiesByFormFactor(Context context) {
        final PackageManager pm = context.getPackageManager();
        boolean isTablet = isTablet(context);

        try {
            PackageInfo pi = pm.getPackageInfo(context.getPackageName(),
                    PackageManager.GET_ACTIVITIES | PackageManager.GET_META_DATA);
            if (pi == null) {
                LOGE(TAG, "No package info found for our own package.");
                return;
            }

            final ActivityInfo[] activityInfos = pi.activities;
            for (ActivityInfo info : activityInfos) {
                String targetDevice = null;
                if (info.metaData != null) {
                    targetDevice = info.metaData.getString(TARGET_FORM_FACTOR_ACTIVITY_METADATA);
                }
                boolean tabletActivity = TARGET_FORM_FACTOR_TABLET.equals(targetDevice);
                boolean handsetActivity = TARGET_FORM_FACTOR_HANDSET.equals(targetDevice);

                boolean enable = !(handsetActivity && isTablet)
                        && !(tabletActivity && !isTablet);

                String className = info.name;
                pm.setComponentEnabledSetting(
                        new ComponentName(context, Class.forName(className)),
                        enable
                                ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
                                : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                        PackageManager.DONT_KILL_APP);
            }
        } catch (PackageManager.NameNotFoundException e) {
            LOGE(TAG, "No package info found for our own package.", e);
        } catch (ClassNotFoundException e) {
            LOGE(TAG, "Activity not found within package.", e);
        }
    }
}