MainActivity.java

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/*
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 * Copyright (C) 2013 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.apprestrictions;
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import android.app.Activity;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.os.Bundle;
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import android.os.UserManager;
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import android.preference.PreferenceManager;
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import android.view.View;
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import android.widget.CheckBox;
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import android.widget.TextView;
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/**
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 * This is the main user interface of the App Restrictions sample app.  It demonstrates the use
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 * of the App Restriction feature, which is available on Android 4.3 and above tablet devices
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 * with the multiuser feature.
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 *
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 * When launched under the primary User account, you can toggle between standard app restriction
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 * types and custom.  When launched under a restricted profile, this activity displays app
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 * restriction settings, if available.
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 *
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 * Follow these steps to exercise the feature:
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 * 1. If this is the primary user, go to Settings > Users.
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 * 2. Create a restricted profile, if one doesn't exist already.
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 * 3. Open the profile settings, locate the sample app, and tap the app restriction settings
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 *    icon. Configure app restrictions for the app.
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 * 4. In the lock screen, switch to the user's restricted profile, launch this sample app,
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 *    and see the configured app restrictions displayed.
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 */
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public class MainActivity extends Activity {
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    private Bundle mRestrictionsBundle;
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    // Checkbox to indicate whether custom or standard app restriction types are selected.
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    private CheckBox mCustomConfig;
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    public static final String CUSTOM_CONFIG_KEY = "custom_config";
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    private TextView mMultiEntryValue;
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    private TextView mChoiceEntryValue;
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    private TextView mBooleanEntryValue;
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    @Override
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    protected void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        // Sets up  user interface elements.
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        setContentView(R.layout.main);
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        mCustomConfig = (CheckBox) findViewById(R.id.custom_app_limits);
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        final boolean customChecked =
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                PreferenceManager.getDefaultSharedPreferences(this).getBoolean(
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                        CUSTOM_CONFIG_KEY, false);
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        if (customChecked) mCustomConfig.setChecked(true);
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        mMultiEntryValue = (TextView) findViewById(R.id.multi_entry_id);
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        mChoiceEntryValue = (TextView) findViewById(R.id.choice_entry_id);
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        mBooleanEntryValue = (TextView) findViewById(R.id.boolean_entry_id);
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    }
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    @Override
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    protected void onResume() {
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        super.onResume();
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        // If app restrictions are set for this package, when launched from a restricted profile,
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        // the settings are available in the returned Bundle as key/value pairs.
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        mRestrictionsBundle =
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                ((UserManager) getSystemService(Context.USER_SERVICE))
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                        .getApplicationRestrictions(getPackageName());
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        if (mRestrictionsBundle == null) {
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            mRestrictionsBundle = new Bundle();
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        }
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        // Reads and displays values from a boolean type restriction entry, if available.
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        // An app can utilize these settings to restrict its content under a restricted profile.
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        final String booleanRestrictionValue =
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                mRestrictionsBundle.containsKey(GetRestrictionsReceiver.KEY_BOOLEAN) ?
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                        mRestrictionsBundle.getBoolean(GetRestrictionsReceiver.KEY_BOOLEAN) + "":
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                        getString(R.string.na);
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        mBooleanEntryValue.setText(booleanRestrictionValue);
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        // Reads and displays values from a single choice restriction entry, if available.
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        final String singleChoiceRestrictionValue =
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                mRestrictionsBundle.containsKey(GetRestrictionsReceiver.KEY_CHOICE) ?
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                        mRestrictionsBundle.getString(GetRestrictionsReceiver.KEY_CHOICE) :
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                        getString(R.string.na);
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        mChoiceEntryValue.setText(singleChoiceRestrictionValue);
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        // Reads and displays values from a multi-select restriction entry, if available.
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        final String[] multiSelectValues =
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                mRestrictionsBundle.getStringArray(GetRestrictionsReceiver.KEY_MULTI_SELECT);
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        if (multiSelectValues == null || multiSelectValues.length == 0) {
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            mMultiEntryValue.setText(getString(R.string.na));
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        } else {
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            String tempValue = "";
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            for (String value : multiSelectValues) {
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                tempValue = tempValue + value + " ";
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            }
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            mMultiEntryValue.setText(tempValue);
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        }
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    }
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    /**
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     * Saves custom app restriction to the shared preference.
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     *
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     * This flag is used by {@code GetRestrictionsReceiver} to determine if a custom app
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     * restriction activity should be used.
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     *
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     * @param view
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     */
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    public void onCustomClicked(View view) {
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        final SharedPreferences.Editor editor =
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                PreferenceManager.getDefaultSharedPreferences(this).edit();
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        editor.putBoolean(CUSTOM_CONFIG_KEY, mCustomConfig.isChecked()).commit();
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    }
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}