com.emetophobe.permissionviewer.activities.MainActivity.java Source code

Introduction

Here is the source code for com.emetophobe.permissionviewer.activities.MainActivity.java

Source

/*
 * Copyright (C) 2013-2015 Mike Cunningham
 *
 * 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.emetophobe.permissionviewer.activities;

import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import com.emetophobe.permissionviewer.PermissionScanner;
import com.emetophobe.permissionviewer.R;
import com.emetophobe.permissionviewer.fragments.AppListFragment;
import com.emetophobe.permissionviewer.fragments.PermissionListFragment;

import java.util.Locale;

public class MainActivity extends ActionBarActivity {
    private static final String PREF_FIRST_RUN = "pref_first_run";

    private static int sViewPagerPosition = 0;
    private ProgressDialog mDialog;

    /**
     * Initialize the main activity.
     */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Make sure default preferences are initialized.
        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);

        // Set up the toolbar.
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
                new IntentFilter(PermissionScanner.PERMISSION_INTENT));

        // Initialize the database the first time the application is run.
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        if (prefs.getBoolean(PREF_FIRST_RUN, true)) {
            new PermissionScanner(this).start();
            prefs.edit().putBoolean(PREF_FIRST_RUN, false).apply();
        } else {
            // Just display the view pager if the database has already been initialized.
            initViewPager();
        }
    }

    @Override
    protected void onDestroy() {
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
        super.onDestroy();
    }

    /**
     * Initialize the view pager and display the first fragment.
     */
    private void initViewPager() {
        ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
        viewPager.setAdapter(new PagerAdapter(getSupportFragmentManager()));
        viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                // Remember the current view pager position
                sViewPagerPosition = position;
            }
        });

        // Restore the pager position
        viewPager.setCurrentItem(sViewPagerPosition);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.action_settings:
            startActivity(new Intent(this, SettingsActivity.class));
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    /**
     * Receives progress updates from the PermissionScanner.
     */
    private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            // Get extra data included in the Intent
            int action = intent.getIntExtra(PermissionScanner.PROGRESS_MESSAGE, 0);
            switch (action) {
            // Display a progress dialog while the database is initializing.
            case PermissionScanner.MESSAGE_PROGRESS_INIT:
                mDialog = new ProgressDialog(MainActivity.this);
                mDialog.setTitle(getString(R.string.progress_title));
                mDialog.setMessage(getString(R.string.progress_message));
                mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                mDialog.setIndeterminate(false);
                mDialog.setCancelable(false);
                mDialog.setMax(intent.getIntExtra(PermissionScanner.PROGRESS_VALUE, 0));
                mDialog.show();
                break;

            // Increment the progress dialog
            case PermissionScanner.MESSAGE_PROGRESS_UPDATE:
                mDialog.setProgress(intent.getIntExtra(PermissionScanner.PROGRESS_VALUE, 0));
                break;

            // Complete the progress dialog and initialize the view pager once the database has been initialized.
            case PermissionScanner.MESSAGE_PROGRESS_COMPLETE:
                mDialog.cancel();
                initViewPager();
                break;
            }
        }
    };

    /**
     * Pager adapter that is used to display the app list and permission list fragments.
     */
    private class PagerAdapter extends FragmentPagerAdapter {
        public PagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public int getCount() {
            return 2;
        }

        @Override
        public Fragment getItem(int position) {
            switch (position) {
            case 0:
                return new AppListFragment();
            case 1:
                return new PermissionListFragment();
            }
            return null;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            Locale l = Locale.getDefault();
            switch (position) {
            case 0:
                return getString(R.string.action_applications).toUpperCase(l);
            case 1:
                return getString(R.string.action_permissions).toUpperCase(l);
            }
            return null;
        }
    }
}