Fragment容器Activity

1//file NoteListActivity
2package jp.co.ricoh.melody.views.activities;
3
4import android.databinding.DataBindingUtil;
5import android.os.Bundle;
6import android.support.annotation.Nullable;
7import android.support.v4.app.Fragment;
8import android.support.v4.app.FragmentTransaction;
9
10import junit.framework.Test;
11
12import jp.co.ricoh.melody.R;
13import jp.co.ricoh.melody.databinding.NoteListActivityBinding;
14import jp.co.ricoh.melody.presenters.INoteListActivityPresenter;
15import jp.co.ricoh.melody.presenters.NoteActivityPresenter;
16import jp.co.ricoh.melody.presenters.NoteListActivityPresenter;
17import jp.co.ricoh.melody.views.fragments.NoteListFragment;
18
19import static android.R.attr.fragment;
20
21/**
22 * Created by leonard on 17-3-11.
23 */
24public class NoteListActivity extends BaseActivity implements NoteActivityPresenter {
25
26    private NoteListActivityBinding mViewDataBinding;
27    private INoteListActivityPresenter mActivityPresenter;
28    private Fragment mCurrentFragment;
29
30    @Override
31    protected void onCreate(@Nullable Bundle savedInstanceState) {
32        super.onCreate(savedInstanceState);
33        initView(savedInstanceState);
34    }
35
36   /* this contain all note functions.
37   * content layout contain note list layout,note item layout,layout item edit
38   * back key will change in fragemnt backstack
39   * */
40
41    private void initView(Bundle savedInstanceState) {
42        mViewDataBinding = DataBindingUtil.setContentView(this, R.layout.activity_note);
43        mActivityPresenter = NoteListActivityPresenter.newInstance();
44        if (savedInstanceState==null) {
45            Fragment fragment = NoteListFragment.newInstance();
46            switchContent(fragment,true);
47        }
48    }
49    @Override
50    public void switchContent(Fragment newFragemnt, boolean reuse) {
51        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction().setCustomAnimations(
52                android.R.anim.fade_in, android.R.anim.fade_out);
53        if (reuse){
54            newFragemnt = getSupportFragmentManager().findFragmentByTag(newFragemnt.getTag());
55        }
56        if (!newFragemnt.isAdded()) {    // 先判断是否被add过
57            transaction.hide(mCurrentFragment).add(R.id.contentFrame, newFragemnt).commitAllowingStateLoss(); // 隐藏当前的fragment，add下一个到Activity中
58        } else {
59            transaction.hide(mCurrentFragment).show(newFragemnt).commitAllowingStateLoss(); // 隐藏当前的fragment，显示下一个
60        }
61        mCurrentFragment = newFragemnt;
62    }
63
64    @Override
65    public void setTitle(String title) {
66        mViewDataBinding.toolbar.setTitle(R.string.app_name);
67    }
68}
69
70//file NoteActivityPresenter
71
72package jp.co.ricoh.melody.presenters;
73
74import android.support.v4.app.Fragment;
75
76/**
77 * Created by leonard on 17-3-13.
78 */
79public interface NoteActivityPresenter {
80    void switchContent(Fragment newFragemnt, boolean reuse);
81    void setTitle(String title);
82}
83
84//res activity_note
85<?xml version="1.0" encoding="utf-8"?>
86<layout xmlns:android="http://schemas.android.com/apk/res/android"
87    xmlns:app="http://schemas.android.com/apk/res-auto"
88    android:layout_width="match_parent"
89    android:layout_height="match_parent">
90
91    <data class="NoteListActivityBinding"/>
92
93    <android.support.design.widget.CoordinatorLayout
94        android:layout_width="match_parent"
95        android:layout_height="match_parent">
96     <include layout="@layout/content_main"
97         android:id="@+id/content"
98            android:layout_height="match_parent"
99            app:layout_behavior="@string/appbar_scrolling_view_behavior"
100            android:layout_width="match_parent"/>
101
102
103        <android.support.design.widget.AppBarLayout
104            android:layout_width="match_parent"
105            android:fitsSystemWindows="true"
106            android:layout_height="?attr/actionBarSize">
107            <android.support.v7.widget.Toolbar
108                android:id="@+id/toolbar"
109                android:layout_width="match_parent"
110                android:layout_height="wrap_content"></android.support.v7.widget.Toolbar>
111        </android.support.design.widget.AppBarLayout>
112
113    </android.support.design.widget.CoordinatorLayout>
114</layout>
115
116//res content_main
117<?xml version="1.0" encoding="utf-8"?>
118<!-- Copyright (C) 2016 RICOH Co.,LTD. -->
119<!-- All rights reserved. -->
120<RelativeLayout
121    xmlns:android="http://schemas.android.com/apk/res/android"
122    android:layout_width="match_parent"
123    android:layout_height="match_parent"
124    android:orientation="horizontal">
125
126    <FrameLayout
127        android:id="@+id/contentFrame"
128        android:layout_width="match_parent"
129        android:layout_height="match_parent">
130    </FrameLayout>
131
132
133</RelativeLayout>