回答編集履歴
2
修正
answer
CHANGED
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@@ -3,7 +3,7 @@
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3
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----
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4
4
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5
5
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回答にしちゃったので、ついでに AndroidStudio のタブのプロジェクト雛形から、タイトルを修正・保存 (SharedPreferences) するコードを作りました。
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6
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-
タブは TagLayout 、ビューページャは ViewPager2 、バインディングは嫌いなので外しています^^;
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6
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タブは TagLayout 、ビューページャは ViewPager2 、ダイアログはフラグメント、バインディングは嫌いなので外しています^^;
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7
7
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8
8
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MainActivity.java
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9
9
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```java
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1
コード追加
answer
CHANGED
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@@ -1,1 +1,256 @@
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1
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-
変更をどこかに保存して、再起動時にそれを読んで設定すれば良いのではと思います。
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1
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変更をどこかに保存して、再起動時にそれを読んで設定すれば良いのではと思います。
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2
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3
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----
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4
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5
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回答にしちゃったので、ついでに AndroidStudio のタブのプロジェクト雛形から、タイトルを修正・保存 (SharedPreferences) するコードを作りました。
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6
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+
タブは TagLayout 、ビューページャは ViewPager2 、バインディングは嫌いなので外しています^^;
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7
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+
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8
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MainActivity.java
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9
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```java
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10
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package com.teratail.q375388;
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11
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12
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import android.content.SharedPreferences;
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13
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import android.os.Bundle;
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import android.view.*;
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15
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import com.google.android.material.tabs.*;
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17
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import androidx.appcompat.app.*;
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19
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import androidx.lifecycle.ViewModelProvider;
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import androidx.viewpager2.widget.ViewPager2;
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21
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import com.teratail.q375388.ui.main.*;
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public class MainActivity extends AppCompatActivity implements View.OnLongClickListener, TabTitleChangeDialogFragment.Listener {
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private SharedPreferences sharedPreferences;
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private TabLayout tabLayout;
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28
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private PageViewModel pageViewModel;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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sharedPreferences = getSharedPreferences("TabTitles", MODE_PRIVATE);
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pageViewModel = new ViewModelProvider(this).get(PageViewModel.class);
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pageViewModel.restoreTabTitles(sharedPreferences, new String[]{
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39
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getString(R.string.tab_text_1), getString(R.string.tab_text_2)
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40
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});
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41
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42
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ViewPager2 viewPager = findViewById(R.id.pager);
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43
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viewPager.setAdapter(new SectionsStateAdapter(this));
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44
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45
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tabLayout = findViewById(R.id.tablayout);
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46
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new TabLayoutMediator(tabLayout, viewPager, (tab, position) -> tab.setText(pageViewModel.getTabTitle(position))).attach();
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47
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48
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for(int i=0; i<tabLayout.getTabCount(); i++) {
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View view = tabLayout.getTabAt(i).view;
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view.setTag(i);
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51
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view.setOnLongClickListener(this);
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}
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}
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@Override
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public boolean onLongClick(View v) {
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int tabIndex = (Integer)v.getTag();
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58
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String title = pageViewModel.getTabTitle(tabIndex);
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59
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TabTitleChangeDialogFragment dialog = TabTitleChangeDialogFragment.newInstance(tabIndex, title);
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60
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dialog.show(getSupportFragmentManager(), "TabTitleChangeDialogFragment");
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61
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return true;
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62
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}
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63
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64
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@Override
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65
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public void onTabTitleChange(TabTitleChangeDialogFragment dialog) {
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66
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String title = dialog.getTitle();
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67
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int tabIndex = dialog.getTabIndex();
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68
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tabLayout.getTabAt(tabIndex).setText(title); //ここでタブの名前を変更
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69
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70
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pageViewModel.setTabTitle(tabIndex, title);
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71
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pageViewModel.saveTabTitles(sharedPreferences);
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72
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}
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73
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}
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74
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```
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75
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res/layout/activity_main.xml
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76
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```xml
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77
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<?xml version="1.0" encoding="utf-8"?>
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78
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<androidx.coordinatorlayout.widget.CoordinatorLayout
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79
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xmlns:android="http://schemas.android.com/apk/res/android"
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80
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xmlns:app="http://schemas.android.com/apk/res-auto"
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81
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xmlns:tools="http://schemas.android.com/tools"
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82
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android:layout_width="match_parent"
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83
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android:layout_height="match_parent"
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84
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tools:context=".MainActivity">
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85
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86
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<com.google.android.material.appbar.AppBarLayout
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87
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android:layout_width="match_parent"
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88
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android:layout_height="wrap_content"
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89
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android:theme="@style/Theme.Q375388.AppBarOverlay">
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90
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91
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<TextView
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92
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android:id="@+id/title"
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93
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android:layout_width="wrap_content"
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94
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android:layout_height="wrap_content"
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95
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android:gravity="center"
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96
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android:minHeight="?actionBarSize"
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97
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android:padding="@dimen/appbar_padding"
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98
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android:text="@string/app_name"
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99
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android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title" />
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100
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101
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<com.google.android.material.tabs.TabLayout
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102
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android:id="@+id/tablayout"
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103
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android:layout_width="match_parent"
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104
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android:layout_height="wrap_content" />
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105
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+
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106
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</com.google.android.material.appbar.AppBarLayout>
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107
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108
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<androidx.viewpager2.widget.ViewPager2
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109
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android:id="@+id/pager"
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110
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android:layout_width="match_parent"
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111
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android:layout_height="match_parent" />
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112
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113
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</androidx.coordinatorlayout.widget.CoordinatorLayout>
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114
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+
```
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115
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ui.main.PageViewModel.java
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116
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```java
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117
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package com.teratail.q375388.ui.main;
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118
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+
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119
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import android.content.SharedPreferences;
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120
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121
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import androidx.lifecycle.ViewModel;
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122
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123
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public class PageViewModel extends ViewModel {
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124
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private String[] tabTitles;
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125
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126
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public String getTabTitle(int index) { return tabTitles[index]; }
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127
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public void setTabTitle(int index, String title) { tabTitles[index] = title; }
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128
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+
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129
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public void restoreTabTitles(SharedPreferences sharedPreferences, String[] defaultTitles) {
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130
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tabTitles = new String[defaultTitles.length];
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131
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+
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132
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+
if(sharedPreferences == null) {
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133
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+
for(int i=0; i<tabTitles.length; i++) {
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134
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tabTitles[i] = defaultTitles[i];
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135
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+
}
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136
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+
} else {
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137
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+
for(int i=0; i<tabTitles.length; i++) {
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138
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tabTitles[i] = sharedPreferences.getString(getPreferencesKey(i), defaultTitles[i]);
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139
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+
}
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140
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+
}
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141
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+
}
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142
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public void saveTabTitles(SharedPreferences sharedPreferences) {
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143
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SharedPreferences.Editor editor = sharedPreferences.edit();
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144
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editor.clear();
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145
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+
for(int i=0; i<tabTitles.length; i++) {
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146
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editor.putString(getPreferencesKey(i), tabTitles[i]);
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147
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+
}
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148
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+
editor.commit();
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149
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+
}
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|
150
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+
|
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151
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+
private String getPreferencesKey(int i) { return "tab"+(i+1); }
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152
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+
}
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153
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+
```
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154
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+
ui.main.TabTitleChangeDialogFragment.java
|
|
155
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+
```java
|
|
156
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+
package com.teratail.q375388.ui.main;
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157
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+
|
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158
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+
import android.app.Dialog;
|
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159
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+
import android.content.*;
|
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160
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+
import android.os.Bundle;
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161
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+
import android.view.*;
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162
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+
import android.widget.EditText;
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163
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+
|
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164
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+
import androidx.annotation.Nullable;
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165
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+
import androidx.appcompat.app.AlertDialog;
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166
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+
import androidx.fragment.app.*;
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|
167
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+
|
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168
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+
import com.teratail.q375388.R;
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169
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+
|
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170
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+
public class TabTitleChangeDialogFragment extends DialogFragment {
|
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171
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+
public interface Listener {
|
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172
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+
void onTabTitleChange(TabTitleChangeDialogFragment dialog);
|
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173
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+
}
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174
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+
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175
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private static final String ARGS_TAB_INDEX = "TabIndex";
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176
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private static final String ARGS_TITLE = "Title";
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177
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+
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178
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public static TabTitleChangeDialogFragment newInstance(int tabIndex, String title) {
|
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179
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+
TabTitleChangeDialogFragment dialog = new TabTitleChangeDialogFragment();
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180
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+
Bundle args = new Bundle();
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181
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+
args.putInt(ARGS_TAB_INDEX, tabIndex);
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182
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+
args.putString(ARGS_TITLE, title);
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183
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+
dialog.setArguments(args);
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184
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+
return dialog;
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185
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+
}
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186
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+
|
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187
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+
private int tabIndex;
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188
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+
private String title;
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189
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+
private Listener listener;
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190
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private EditText editText;
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191
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+
|
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192
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@Override
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193
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+
public void onCreate(@Nullable Bundle savedInstanceState) {
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194
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+
super.onCreate(savedInstanceState);
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195
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+
Bundle args = getArguments();
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196
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+
tabIndex = args.getInt(ARGS_TAB_INDEX);
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197
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+
title = args.getString(ARGS_TITLE);
|
|
198
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+
}
|
|
199
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+
|
|
200
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+
public int getTabIndex() { return tabIndex; }
|
|
201
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+
public String getTitle() { return editText.getText().toString(); }
|
|
202
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+
|
|
203
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+
@Override
|
|
204
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+
public void onAttach(Context context) {
|
|
205
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+
super.onAttach(context);
|
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206
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+
try {
|
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207
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+
listener = (Listener)context;
|
|
208
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+
} catch (ClassCastException e) {
|
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209
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+
throw new ClassCastException(context.toString() + " must implement TabTitleChangeDialogListener");
|
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210
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+
}
|
|
211
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+
}
|
|
212
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+
|
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213
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+
@Override
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214
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+
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
|
|
215
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+
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
|
|
216
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+
LayoutInflater inflater = requireActivity().getLayoutInflater();
|
|
217
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+
View inputView = inflater.inflate(R.layout.fragment_tab_title_change_dialog, null);
|
|
218
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+
editText = inputView.findViewById(R.id.editText1);
|
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219
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+
editText.setText(title);
|
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220
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+
editText.requestFocus();
|
|
221
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+
editText.setSelection(0, title.length());
|
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222
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+
|
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223
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+
builder.setView(inputView)
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224
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+
.setTitle("カテゴリ名変更")
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|
225
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+
.setPositiveButton("変更", new DialogInterface.OnClickListener() {
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226
|
+
public void onClick(DialogInterface dialog, int id) {
|
|
227
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+
listener.onTabTitleChange(TabTitleChangeDialogFragment.this);
|
|
228
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+
}
|
|
229
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+
})
|
|
230
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+
.setNegativeButton("キャンセル", (dialog, id) -> TabTitleChangeDialogFragment.this.getDialog().cancel());
|
|
231
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+
return builder.create();
|
|
232
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+
}
|
|
233
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+
}
|
|
234
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+
```
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235
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+
res/layout/fragment_tab_title_change_dialog.xml
|
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236
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+
```xml
|
|
237
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+
<?xml version="1.0" encoding="utf-8"?>
|
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238
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+
<androidx.constraintlayout.widget.ConstraintLayout
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239
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+
xmlns:android="http://schemas.android.com/apk/res/android"
|
|
240
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+
xmlns:app="http://schemas.android.com/apk/res-auto"
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|
241
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+
xmlns:tools="http://schemas.android.com/tools"
|
|
242
|
+
android:layout_width="match_parent"
|
|
243
|
+
android:layout_height="match_parent"
|
|
244
|
+
tools:context=".ui.main.TabTitleChangeDialogFragment">
|
|
245
|
+
|
|
246
|
+
<EditText
|
|
247
|
+
android:id="@+id/editText1"
|
|
248
|
+
android:layout_width="wrap_content"
|
|
249
|
+
android:layout_height="wrap_content"
|
|
250
|
+
android:ems="16"
|
|
251
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+
android:singleLine="true"
|
|
252
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+
app:layout_constraintLeft_toLeftOf="parent"
|
|
253
|
+
app:layout_constraintTop_toTopOf="parent" />
|
|
254
|
+
|
|
255
|
+
</androidx.constraintlayout.widget.ConstraintLayout>
|
|
256
|
+
```
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