Java tutorial
/* * Copyright (C) 2015 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 info.tongrenlu; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.design.widget.NavigationView; import android.support.design.widget.TabLayout; import android.support.v4.app.ActivityCompat; import android.support.v4.app.ActivityOptionsCompat; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.util.Pair; import android.support.v4.view.GravityCompat; import android.support.v4.view.ViewPager; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import com.bumptech.glide.Glide; import java.util.ArrayList; import java.util.List; import info.tongrenlu.domain.UserBean; import info.tongrenlu.util.OnFragmentInteractionListener; /** * TODO */ public class MainActivity extends AppCompatActivity implements OnFragmentInteractionListener { public static final int ALBUM_LOADER = 0; public static final int PLAYLIST_LOADER = 1; public static final int TRACK_LOADER = 2; private boolean mSignin = false; private UserBean mUser = null; private DrawerLayout mDrawerLayout; private ViewPager mViewPager; private TabLayout mTabLayout; @Override public void onFragmentInteraction(final Fragment target, Bundle data, Pair<View, String>[] sharedElements) { if (target instanceof MusicListFragment) { // get the element that receives the click event Intent intent = new Intent(this.getApplicationContext(), MusicDetailActivity.class); intent.putExtras(data); ActivityOptionsCompat options = ActivityOptionsCompat.makeSceneTransitionAnimation(this, sharedElements); // start the new activity ActivityCompat.startActivity(this, intent, options.toBundle()); } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initUser(this.getApplicationContext()); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); final ActionBar ab = getSupportActionBar(); if (ab != null) { ab.setHomeAsUpIndicator(R.drawable.ic_menu); ab.setDisplayHomeAsUpEnabled(true); } mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); if (navigationView != null) { setupDrawerContent(navigationView); } mTabLayout = (TabLayout) findViewById(R.id.tabs); // mTabLayout.setTabMode(TabLayout.MODE_SCROLLABLE); mViewPager = (ViewPager) findViewById(R.id.viewpager); if (mViewPager != null) { setupViewPager(mViewPager); } } private void initUser(Context context) { SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context); Long id = sharedPreferences.getLong("userId", 0); String defaultNickname = getString(R.string.guest); String nickname = sharedPreferences.getString("nickname", defaultNickname); mUser = new UserBean(); mUser.setId(id); mUser.setNickname(nickname); } @Override protected void onStart() { super.onStart(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.sample_actions, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: mDrawerLayout.openDrawer(GravityCompat.START); return true; } return super.onOptionsItemSelected(item); } private void setupViewPager(ViewPager viewPager) { Adapter adapter = new Adapter(getSupportFragmentManager()); adapter.addFragment(new MusicListFragment(), getString(R.string.label_album)); adapter.addFragment(new PlaylistFragment(), getString(R.string.label_playlist)); adapter.addFragment(new TrackFragment(), getString(R.string.label_track)); viewPager.setAdapter(adapter); mTabLayout.setupWithViewPager(viewPager); } private void setupDrawerContent(NavigationView navigationView) { ImageView userAvatar = (ImageView) navigationView.findViewById(R.id.avatar); if (mUser.isGuest()) { Glide.with(this).load(R.drawable.default_cover).into(userAvatar); } else { Glide.with(this).load("http://files.tongrenlu.info/u" + mUser.getId() + "/cover_400.jpg") .into(userAvatar); } TextView username = (TextView) navigationView.findViewById(R.id.username); username.setText(mUser.getNickname()); navigationView.getMenu().findItem(R.id.nav_signup).setVisible(mUser.isGuest()); navigationView.getMenu().findItem(R.id.nav_signin).setVisible(mUser.isGuest()); navigationView.getMenu().findItem(R.id.nav_signout).setVisible(!mUser.isGuest()); navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { @Override public boolean onNavigationItemSelected(MenuItem menuItem) { menuItem.setChecked(true); mDrawerLayout.closeDrawers(); switch (menuItem.getItemId()) { case R.id.nav_signin: //mViewPager.setCurrentItem(0,true); //setupViewPager(mViewPager); break; case R.id.nav_signout: //mViewPager.setCurrentItem(1,true); //setupViewPager2(mViewPager); break; } return true; } }); // navigationView.findViewById(R.id.nav_signup).setVisibility(View.GONE); // navigationView.findViewById(R.id.nav_signout).setVisibility(View.GONE); } @Override public boolean onPrepareOptionsMenu(final Menu menu) { // menu.findItem(R.id.nav_signup).setVisible(false); // menu.findItem(R.id.nav_signout).setVisible(false); return super.onPrepareOptionsMenu(menu); } static class Adapter extends FragmentPagerAdapter { private final List<Fragment> mFragments = new ArrayList<>(); private final List<String> mFragmentTitles = new ArrayList<>(); public Adapter(FragmentManager fm) { super(fm); } public void addFragment(Fragment fragment, String title) { mFragments.add(fragment); mFragmentTitles.add(title); } @Override public Fragment getItem(int position) { return mFragments.get(position); } @Override public int getCount() { return mFragments.size(); } @Override public CharSequence getPageTitle(int position) { return mFragmentTitles.get(position); } } }