Java tutorial
/* * * Copyright (c) 2016 Krupal Shah, Harsh Bhavsar * 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.experiments.whereapp.application.home.activities; import android.Manifest; import android.annotation.TargetApi; import android.content.Intent; import android.content.IntentSender; import android.graphics.Color; import android.os.Build; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.annotation.StringRes; import android.support.design.widget.TabLayout; import android.support.v4.app.Fragment; import android.support.v4.view.ViewPager; import android.view.View; import android.view.Window; import android.view.WindowManager; import com.droidexperiments.android.where.R; import com.experiments.core.application.activities.BaseActivity; import com.experiments.core.application.adapters.CommonPagerAdapter; import com.experiments.core.application.views.CustomTextView; import com.experiments.core.domain.exceptions.PermissionDeniedException; import com.experiments.core.util.PermissionDispatcher; import com.experiments.whereapp.application.home.fragments.ExplorePlacesFragment; import com.experiments.whereapp.application.home.fragments.RecommendedPlacesFragment; import com.experiments.whereapp.application.home.fragments.SavedPlacesFragment; import com.experiments.whereapp.presentation.home.presenters.HomePresenter; import com.experiments.whereapp.presentation.home.routers.HomeScreenRouter; import com.experiments.whereapp.presentation.home.views.HomeScreenView; import com.google.android.gms.common.GooglePlayServicesRepairableException; import com.google.android.gms.common.api.Status; import com.google.android.gms.location.LocationSettingsStates; import com.google.android.gms.location.places.ui.PlacePicker; import java.util.ArrayList; import java.util.List; import butterknife.BindView; import butterknife.ButterKnife; import butterknife.OnClick; import hugo.weaving.DebugLog; /** * Author : Krupal Shah * Date : 02-Apr-16 * <p> * home screen activity after launch screen ends */ public class HomeActivity extends BaseActivity implements HomeScreenView, HomeScreenRouter, ViewPager.OnPageChangeListener { private static final String TAG = "HomeActivity"; //request code to ask for location settings if not on for the app private static final int REQUEST_LOCATION_SETTINGS = 100; //request code for google place picker private static final int REQUEST_PLACE_PICKER = 101; //request code for asking location permissions for updating location private static final int PERMISSION_LOCATION_UPDATES = 200; //request code for asking location permissions for place picker private static final int PERMISSION_PLACE_PICKER = 201; //array of permissions to be asked for getting location access private static final String[] LOCATION_PERMISSIONS = new String[] { Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION }; //tab positions in view pager private static final int TAB_POSITION_HOME = 0; private static final int TAB_POSITION_EXPLORE = 1; private static final int TAB_POSITION_BOOKMARKS = 2; @BindView(R.id.txt_title_toolbar) CustomTextView txtTitleToolbar; @BindView(R.id.tabs_home) TabLayout tabsHome; @BindView(R.id.pager_home) ViewPager pagerHome; private HomePresenter homePresenter; private PermissionDispatcher permissionDispatcher; private List<Integer> toolbarTitles; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); ButterKnife.bind(this); initComponents(); } @Override protected void initComponents() { permissionDispatcher = PermissionDispatcher.create(); homePresenter = HomePresenter.create(); homePresenter.attachView(this); homePresenter.registerPlaceUpdates(); } @Override protected void onStart() { super.onStart(); if (!permissionDispatcher.askPermissionsIfNotGranted(this, PERMISSION_LOCATION_UPDATES, LOCATION_PERMISSIONS)) { return; } homePresenter.requestPlaceUpdates(); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode) { case REQUEST_LOCATION_SETTINGS: //got result from resolution dialog LocationSettingsStates locationSettingsStates = LocationSettingsStates.fromIntent(data); homePresenter.checkTurnOnLocationResult(locationSettingsStates); break; case REQUEST_PLACE_PICKER: //got result from place picker homePresenter.checkPlacePickerResult(resultCode, data); break; } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) { case PERMISSION_LOCATION_UPDATES: //requesting location updates if permissions granted if (permissionDispatcher.checkGrantResults(this, requestCode, grantResults, R.string.allow_location_updates, LOCATION_PERMISSIONS)) { homePresenter.requestPlaceUpdates(); } else { homePresenter.postErrorGettingPlaceEvent(new PermissionDeniedException(LOCATION_PERMISSIONS)); } break; case PERMISSION_PLACE_PICKER: //opening place picker if permissions granted if (permissionDispatcher.checkGrantResults(this, requestCode, grantResults, R.string.allow_place_search, LOCATION_PERMISSIONS)) { navigateToPlacePicker(); } break; } } @Override protected void onStop() { homePresenter.stopPlaceUpdates(); super.onStop(); } @Override protected void onDestroy() { homePresenter.unregisterPlaceUpdates(); homePresenter.detachView(); super.onDestroy(); } @TargetApi(Build.VERSION_CODES.KITKAT) @Override public void makeStatusBarTransparent() { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return; Window window = getWindow(); window.getDecorView() .setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { window.setStatusBarColor(Color.TRANSPARENT); } else { window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); } } @Override public void setToolbarTitle(@StringRes int titleRes) { txtTitleToolbar.setText(titleRes); } @Override public void setupViewPager() { //preparing fragments List<Fragment> fragments = new ArrayList<>(); prepareTabFragments(fragments); //setting pager adapter setPagerAdapter(fragments); //setting up tabs with view pager tabsHome.setupWithViewPager(pagerHome); //setting tab icons according to view pager setTabIcons(); //creating toolbar titles for equivalent tabs & setting current title to home toolbarTitles = new ArrayList<>(tabsHome.getTabCount()); prepareToolbarTitles(toolbarTitles); setToolbarTitle(toolbarTitles.get(tabsHome.getSelectedTabPosition())); } @Override public void showTurnOnLocationDialog(Status locationSettingsStatus) { try { //this will show location dialog to user locationSettingsStatus.startResolutionForResult(HomeActivity.this, REQUEST_LOCATION_SETTINGS); } catch (IntentSender.SendIntentException e) { e.printStackTrace(); homePresenter.postErrorGettingPlaceEvent(e); } } @DebugLog @Override public void onPageSelected(int position) { setToolbarTitle(toolbarTitles.get(position)); } @DebugLog @Override public void removeCallbacks() { pagerHome.clearOnPageChangeListeners(); } @OnClick({ R.id.img_search_toolbar, R.id.img_settings_toolbar }) public void onClick(View view) { super.onClick(view); switch (view.getId()) { case R.id.img_search_toolbar: navigateToPlacePicker(); break; case R.id.img_settings_toolbar: navigateToSettings(); break; } } @Override public void navigateToSettings() { } @Override public void navigateToPlacePicker() { //place picker requires location permissions if (!permissionDispatcher.askPermissionsIfNotGranted(this, PERMISSION_PLACE_PICKER, LOCATION_PERMISSIONS)) { return; } //building place picker intent and starting activity for result try { PlacePicker.IntentBuilder placeIntentBuilder = new PlacePicker.IntentBuilder(); startActivityForResult(placeIntentBuilder.build(this), REQUEST_PLACE_PICKER); } catch (Exception e) { handleErrorOpeningPlacePicker(e); } } private void prepareTabFragments(List<Fragment> fragments) { fragments.add(RecommendedPlacesFragment.newInstance()); fragments.add(ExplorePlacesFragment.newInstance()); fragments.add(SavedPlacesFragment.newInstance()); } private void prepareToolbarTitles(List<Integer> toolbarTitles) { toolbarTitles.add(TAB_POSITION_HOME, R.string.home); toolbarTitles.add(TAB_POSITION_EXPLORE, R.string.explore); toolbarTitles.add(TAB_POSITION_BOOKMARKS, R.string.bookmarks); } private void setTabIcons() { for (int tabPosition = 0; tabPosition < tabsHome.getTabCount(); tabPosition++) { TabLayout.Tab tab = tabsHome.getTabAt(tabPosition); if (tab == null) continue; switch (tabPosition) { case TAB_POSITION_HOME: tab.setIcon(R.drawable.ic_home_white_24dp); break; case TAB_POSITION_EXPLORE: tab.setIcon(R.drawable.ic_explore_white_24dp); break; case TAB_POSITION_BOOKMARKS: tab.setIcon(R.drawable.ic_bookmark_white_24dp); break; } } } private void setPagerAdapter(List<Fragment> fragments) { CommonPagerAdapter commonPagerAdapter = new CommonPagerAdapter(getSupportFragmentManager(), fragments); pagerHome.setOffscreenPageLimit(fragments.size()); pagerHome.setAdapter(commonPagerAdapter); pagerHome.addOnPageChangeListener(this); } @DebugLog private void handleErrorOpeningPlacePicker(Exception e) { e.printStackTrace(); if (e instanceof GooglePlayServicesRepairableException) { showSnakeBar(R.string.err_play_services_disabled, android.R.string.ok, null); } else { showSnakeBar(R.string.err_play_services_not_available, android.R.string.ok, null); } } @DebugLog @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @DebugLog @Override public void onPageScrollStateChanged(int state) { } }