package com.kelin.mvvmlight.zhihu;
import android.databinding.DataBindingUtil;
import android.databinding.ViewDataBinding;
import android.graphics.Color;
import android.os.Bundle;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.Toolbar;
import android.text.SpannableString;
import android.view.Menu;
import android.view.MenuItem;
import com.kelin.mvvmlight.messenger.Messenger;
import com.kelin.mvvmlight.zhihu.news.NewsListFragment;
import com.kelin.mvvmlight.zhihu.utils.AlphaForegroundColorSpan;
import com.kelin.mvvmlight.zhihu.utils.ViewUtils;
import com.trello.rxlifecycle.components.support.RxAppCompatActivity;
import com.viewpagerindicator.CirclePageIndicator;
public class MainActivity extends RxAppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private AlphaForegroundColorSpan alphaForegroundColorSpan;
private SpannableString actionBarTitleSpan;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ViewDataBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
binding.setVariable(com.kelin.mvvmlight.zhihu.BR.viewModel, new MainViewModel(this));
CollapsingToolbarLayout collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(true);
((AppBarLayout) findViewById(R.id.appBarLayout)).addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
int height = appBarLayout.getHeight() - getSupportActionBar().getHeight() - ViewUtils.getStatusBarHeight(MainActivity.this);
int alpha = 255 * (0 - verticalOffset) / height;
collapsingToolbarLayout.setExpandedTitleColor(Color.argb(0, 255, 255, 255));
collapsingToolbarLayout.setCollapsedTitleTextColor(Color.argb(alpha, 255, 255, 255));
}
});
CirclePageIndicator circlePageIndicator = (CirclePageIndicator) findViewById(R.id.indicator);
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
// Indicator must setViewPager after setAdapter,but data for ViewPager is load in other ViewModel
Messenger.getDefault().register(this, MainViewModel.TOKEN_UPDATE_INDICATOR, () ->
circlePageIndicator.setViewPager(viewPager));
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
NewsListFragment fragment = new NewsListFragment();
getFragmentManager().beginTransaction()
.replace(R.id.content, fragment)
.commit();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_gallery) {
NewsListFragment fragment = new NewsListFragment();
getFragmentManager().beginTransaction()
.replace(R.id.content, fragment)
.commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
@Override
protected void onDestroy() {
super.onDestroy();
Messenger.getDefault().unregister(this);
}
}