项目开发第二天

今天的任务是设置fragment控件实现多页面滑动。

共设置三个控件：概要、支出、收入。

源代码：

三个控件menu:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/navigation_home"
        android:icon="@drawable/tab_icon1"
        android:title="@string/title_summary" />

    <item
        android:id="@+id/navigation_dashboard"
        android:icon="@drawable/tab_icon2"
        android:title="@string/title_income" />

    <item
        android:id="@+id/navigation_notifications"
        android:icon="@drawable/tab_icon3"
        android:title="@string/title_outlay" />

</menu>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".MainActivity"
    tools:showIn="@layout/app_bar_main">

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/navigation"
        android:layout_marginBottom="-80dp" />

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?android:attr/windowBackground"
        android:layout_alignParentBottom="true"
        app:menu="@menu/navigation" />

</RelativeLayout>

package net.hnjdzy.tinyaccount;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

import net.hnjdzy.tinyaccount.activity.AboutActivity;
import net.hnjdzy.tinyaccount.activity.HelpActivity;
import net.hnjdzy.tinyaccount.activity.RegisterActivity;
import net.hnjdzy.tinyaccount.activity.SettingActivity;
import net.hnjdzy.tinyaccount.adapter.ViewPagerAdapter;
import net.hnjdzy.tinyaccount.fragment.IncomeFragment;
import net.hnjdzy.tinyaccount.fragment.OutlayFragment;
import net.hnjdzy.tinyaccount.fragment.SummaryFragment;

/**
 * 主界面，导航，测边菜单
 * @author androiddev@163.com,hnjdzy
 */
public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    private ViewPager viewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        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.addDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);

        BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);

        viewPager = (ViewPager) findViewById(R.id.viewpager);
        setupViewPager(viewPager);




    }

    @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) {
            Intent intent = new Intent(this, RegisterActivity.class);
            startActivity(intent);
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    //左侧边菜单栏的事件处理
    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_manage) {
            //设置界面，类别维护
            Intent intent = new Intent(this, SettingActivity.class);
            startActivity(intent);
        } else if (id == R.id.nav_share) {
            // 分享
        } else if (id == R.id.nav_send) {
            //报告
        }else if (id == R.id.nav_help) {
            //帮助界面
            Intent intent = new Intent(this, HelpActivity.class);
            startActivity(intent);
        }
        else if (id == R.id.nav_about) {
            //关于软件
            Intent intent = new Intent(this, AboutActivity.class);
            startActivity(intent);
        }
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

    // 底部导航栏的事件处理
    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            switch (item.getItemId()) {
                case R.id.navigation_home:
                    viewPager.setCurrentItem(0);
                    return true;
                case R.id.navigation_dashboard:
                    viewPager.setCurrentItem(1);
                    return true;
                case R.id.navigation_notifications:
                    viewPager.setCurrentItem(2);
                    return true;
                default:break;
            }
            return false;
        }
    };

    //创建底部导航对应的Fragment
    private void setupViewPager(ViewPager viewPager) {
        ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
        SummaryFragment f1 = new SummaryFragment();
        IncomeFragment f2 = new IncomeFragment();
        OutlayFragment f3 = new OutlayFragment();
        adapter.addFragment(f1);
        adapter.addFragment(f2);
        adapter.addFragment(f3);
        viewPager.setAdapter(adapter);
    }
}