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	<title>Fragment &#8211; 記下來</title>
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	<description>一路上踩到的坑、遇到的問題，一點一滴記下來，希望能幫助到需要的人~</description>
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	<title>Fragment &#8211; 記下來</title>
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	<item>
		<title>Android Tabhost with FragmentActivity</title>
		<link>https://noter.tw/2125/android-tabhost-with-fragmentactivity/</link>
					<comments>https://noter.tw/2125/android-tabhost-with-fragmentactivity/#comments</comments>
		
		<dc:creator><![CDATA[黃小蛙]]></dc:creator>
		<pubDate>Wed, 29 Feb 2012 15:26:55 +0000</pubDate>
				<category><![CDATA[手機 App]]></category>
		<category><![CDATA[Android]]></category>
		<category><![CDATA[TabHost]]></category>
		<category><![CDATA[onConfigurationChanged]]></category>
		<category><![CDATA[screenOrientation]]></category>
		<category><![CDATA[Fragment]]></category>
		<category><![CDATA[FragmentActivity]]></category>
		<guid isPermaLink="false">http://wazai.net/?p=2125</guid>

					<description><![CDATA[<p>(2013-01-30 更新) 接續 Android TabHost中切換Activity 記錄了使用 ActivityGroup 達到在 TabHost 中切換 Activity 的方法，也在 An&#46;&#46;&#46;</p>
<p>這篇文章 <a rel="nofollow" href="https://noter.tw/2125/android-tabhost-with-fragmentactivity/" data-wpel-link="internal">Android Tabhost with FragmentActivity</a> 最早出現於 <a rel="nofollow" href="https://noter.tw" data-wpel-link="internal">記下來</a>。</p>
]]></description>
										<content:encoded><![CDATA[<p>(2013-01-30 更新) 接續 <a href="https://noter.tw/2114/" target="_blank" rel="noopener noreferrer" data-wpel-link="internal"><strong>Android TabHost中切換Activity</strong></a> 記錄了使用 <strong>ActivityGroup 達到在 TabHost 中切換 Activity </strong>的方法，也在 <a href="https://noter.tw/2120/" target="_blank" rel="noopener noreferrer" data-wpel-link="internal"><strong>Android Screen Orientation Event螢幕方向處理+Acitivity Liftcycle</strong></a> 記錄了當螢幕方向改變時的處理，這篇小蛙繼續記錄<strong>用 FragmentActivity 取代 ActivityGroup</strong>，透過 <strong><span style="color: #ff0000;">FragmentActivity </span></strong>內建的 <strong>BackStack </strong>來管理倒退歷程。<br />
<span id="more-2125"></span>這個程式碼小蛙很早之前就實作完成，但礙於螢幕方向改變時的處理一直還找不到解決辦法，所以一直拖到現在，不囉嗦直接進程式碼。<br />
<strong>MainTabActivity.java</strong> : 主要的 Tabhost Activity。</p>
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<div class="line number1 index0 alt2"><code class="java keyword">public</code> <code class="java keyword">class</code> <code class="java plain">MainTabActivity </code><code class="java keyword">extends</code> <code class="java plain">Activity {</code></div>
<div class="line number2 index1 alt1"><code class="java spaces">    </code><code class="java keyword">private</code> <code class="java plain">TabHost mHost;</code></div>
<div class="line number3 index2 alt2"><code class="java spaces">    </code><code class="java comments">// 在Activity中使用Tabhost必須要有LocalActivityManager物件來設定</code></div>
<div class="line number4 index3 alt1"><code class="java spaces">    </code><code class="java plain">LocalActivityManager lam;</code></div>
<div class="line number5 index4 alt2"><code class="java spaces">    </code><code class="java color1">@Override</code></div>
<div class="line number6 index5 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">void</code> <code class="java plain">onCreate(Bundle savedInstanceState) {</code></div>
<div class="line number7 index6 alt2"><code class="java spaces">        </code><code class="java keyword">super</code><code class="java plain">.onCreate(savedInstanceState);</code></div>
<div class="line number8 index7 alt1"><code class="java spaces">        </code><code class="java plain">setContentView(R.layout.main);</code></div>
<div class="line number9 index8 alt2"><code class="java spaces">        </code><code class="java comments">// main layout採用預設的Tabhost</code></div>
<div class="line number10 index9 alt1"><code class="java spaces">        </code><code class="java plain">mHost = (TabHost) findViewById(android.R.id.tabhost);</code></div>
<div class="line number11 index10 alt2"><code class="java spaces">        </code><code class="java plain">lam = </code><code class="java keyword">new</code> <code class="java plain">LocalActivityManager(MainTabActivity.</code><code class="java keyword">this</code><code class="java plain">, </code><code class="java keyword">false</code><code class="java plain">);</code></div>
<div class="line number12 index11 alt1"><code class="java spaces">        </code><code class="java plain">lam.dispatchCreate(savedInstanceState);</code></div>
<div class="line number13 index12 alt2"><code class="java spaces">        </code><code class="java plain">mHost.setup(lam);</code></div>
<div class="line number14 index13 alt1"><code class="java spaces">        </code><code class="java plain">mHost.addTab(mHost.newTabSpec(</code><code class="java string">"Tab1"</code><code class="java plain">).setIndicator(</code><code class="java string">"Tab1"</code><code class="java plain">).setContent(</code><code class="java keyword">new</code> <code class="java plain">Intent(MainTabActivity.</code><code class="java keyword">this</code><code class="java plain">, FragmentActivity1.</code><code class="java keyword">class</code><code class="java plain">)));</code></div>
<div class="line number15 index14 alt2"><code class="java spaces">        </code><code class="java plain">mHost.addTab(mHost.newTabSpec(</code><code class="java string">"Tab2"</code><code class="java plain">).setIndicator(</code><code class="java string">"Tab2"</code><code class="java plain">).setContent(</code><code class="java keyword">new</code> <code class="java plain">Intent(MainTabActivity.</code><code class="java keyword">this</code><code class="java plain">, FragmentActivity2.</code><code class="java keyword">class</code><code class="java plain">)));</code></div>
<div class="line number16 index15 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number17 index16 alt2"><code class="java spaces">    </code><code class="java color1">@Override</code></div>
<div class="line number18 index17 alt1"><code class="java spaces">    </code><code class="java keyword">protected</code> <code class="java keyword">void</code> <code class="java plain">onPause() {</code></div>
<div class="line number19 index18 alt2"><code class="java spaces">        </code><code class="java comments">// 漏掉這行一定出錯</code></div>
<div class="line number20 index19 alt1"><code class="java spaces">        </code><code class="java plain">lam.dispatchPause(isFinishing());</code></div>
<div class="line number21 index20 alt2"><code class="java spaces">        </code><code class="java keyword">super</code><code class="java plain">.onPause();</code></div>
<div class="line number22 index21 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number23 index22 alt2"><code class="java spaces">    </code><code class="java color1">@Override</code></div>
<div class="line number24 index23 alt1"><code class="java spaces">    </code><code class="java keyword">protected</code> <code class="java keyword">void</code> <code class="java plain">onResume() {</code></div>
<div class="line number25 index24 alt2"><code class="java spaces">        </code><code class="java comments">// 漏掉這行一定出錯</code></div>
<div class="line number26 index25 alt1"><code class="java spaces">        </code><code class="java plain">lam.dispatchResume();</code></div>
<div class="line number27 index26 alt2"><code class="java spaces">        </code><code class="java keyword">super</code><code class="java plain">.onResume();</code></div>
<div class="line number28 index27 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number29 index28 alt2"><code class="java plain">}</code></div>
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<p><strong>FragmentActivity1.java</strong> : 第一個 Tab 中用來管理 Fragment 的 FragmentActivity。(2012-05-07更新) 經由 Jay 留言後，小蛙詳細測了一下，發現 FragmentActivity 主畫面中的 Button 是沒辦法消失的 (因為 FragmentActivity 的目的關係)，因此改成這樣，讓 FragmentActivity 純粹當成容器，主要的內容還是以 Fragment 為主。(這個方法不是唯一，但是一個可行的方法，應該也有更好的做法！)</p>
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<div class="line number1 index0 alt2"><code class="java keyword">public</code> <code class="java keyword">class</code> <code class="java plain">FragmentActivity1 </code><code class="java keyword">extends</code> <code class="java plain">FragmentActivity {</code></div>
<div class="line number2 index1 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">static</code> <code class="java plain">FragmentManager fm;</code></div>
<div class="line number3 index2 alt2"><code class="java spaces">    </code><code class="java color1">@Override</code></div>
<div class="line number4 index3 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">void</code> <code class="java plain">onCreate(Bundle savedInstanceState) {</code></div>
<div class="line number5 index4 alt2"><code class="java spaces">        </code><code class="java keyword">super</code><code class="java plain">.onCreate(savedInstanceState);</code></div>
<div class="line number6 index5 alt1"><code class="java spaces">        </code><code class="java plain">setContentView(R.layout.fragment_activity_1);</code></div>
<div class="line number7 index6 alt2"><code class="java spaces">        </code><code class="java plain">fm = getSupportFragmentManager();</code></div>
<div class="line number8 index7 alt1"><code class="java spaces">        </code><code class="java comments">// 只當容器，主要內容已Fragment呈現</code></div>
<div class="line number9 index8 alt2"><code class="java spaces">        </code><code class="java plain">initFragment(</code><code class="java keyword">new</code> <code class="java plain">Fragment1());</code></div>
<div class="line number10 index9 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number11 index10 alt2"><code class="java spaces">    </code><code class="java comments">// 切換Fragment</code></div>
<div class="line number12 index11 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">static</code> <code class="java keyword">void</code> <code class="java plain">changeFragment(Fragment f){</code></div>
<div class="line number13 index12 alt2"><code class="java spaces">        </code><code class="java plain">changeFragment(f, </code><code class="java keyword">false</code><code class="java plain">);</code></div>
<div class="line number14 index13 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number15 index14 alt2"><code class="java spaces">    </code><code class="java comments">// 初始化Fragment(FragmentActivity中呼叫)</code></div>
<div class="line number16 index15 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">static</code> <code class="java keyword">void</code> <code class="java plain">initFragment(Fragment f){</code></div>
<div class="line number17 index16 alt2"><code class="java spaces">        </code><code class="java plain">changeFragment(f, </code><code class="java keyword">true</code><code class="java plain">);</code></div>
<div class="line number18 index17 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number19 index18 alt2"><code class="java spaces">    </code><code class="java keyword">private</code> <code class="java keyword">static</code> <code class="java keyword">void</code> <code class="java plain">changeFragment(Fragment f, </code><code class="java keyword">boolean</code> <code class="java plain">init){</code></div>
<div class="line number20 index19 alt1"><code class="java spaces">        </code><code class="java plain">FragmentTransaction ft = fm.beginTransaction();</code></div>
<div class="line number21 index20 alt2"><code class="java spaces">        </code><code class="java plain">ft.replace(R.id.simple_fragment, f);</code></div>
<div class="line number22 index21 alt1"><code class="java spaces">        </code><code class="java keyword">if</code><code class="java plain">(!init)</code></div>
<div class="line number23 index22 alt2"><code class="java spaces">            </code><code class="java plain">ft.addToBackStack(</code><code class="java keyword">null</code><code class="java plain">);</code></div>
<div class="line number24 index23 alt1"><code class="java spaces">        </code><code class="java plain">ft.commit();</code></div>
<div class="line number25 index24 alt2"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number26 index25 alt1"><code class="java plain">}</code></div>
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<p><strong>Fragment1.java</strong> : 真正使用到的 Fragment。</p>
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<div class="line number1 index0 alt2"><code class="java keyword">public</code> <code class="java keyword">class</code> <code class="java plain">Fragment1 </code><code class="java keyword">extends</code> <code class="java plain">Fragment {</code></div>
<div class="line number2 index1 alt1"><code class="java spaces">    </code><code class="java color1">@Override</code></div>
<div class="line number3 index2 alt2"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java plain">View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {</code></div>
<div class="line number4 index3 alt1"><code class="java spaces">        </code><code class="java plain">View v = inflater.inflate(R.layout.fragment_1, container, </code><code class="java keyword">false</code><code class="java plain">);</code></div>
<div class="line number5 index4 alt2"><code class="java spaces">        </code><code class="java plain">Button tv = (Button)v.findViewById(R.id.button2);</code></div>
<div class="line number6 index5 alt1"><code class="java spaces">        </code><code class="java plain">tv.setOnClickListener(</code><code class="java keyword">new</code> <code class="java plain">View.OnClickListener() {</code></div>
<div class="line number7 index6 alt2"><code class="java spaces">            </code><code class="java color1">@Override</code></div>
<div class="line number8 index7 alt1"><code class="java spaces">            </code><code class="java keyword">public</code> <code class="java keyword">void</code> <code class="java plain">onClick(View v) {</code></div>
<div class="line number9 index8 alt2"><code class="java spaces">                </code><code class="java comments">// 直接呼叫FragmentActivity1的靜態方法來做切換</code></div>
<div class="line number10 index9 alt1"><code class="java spaces">                </code><code class="java plain">FragmentActivity1.changeFragment(</code><code class="java keyword">new</code> <code class="java plain">Fragment2());</code></div>
<div class="line number11 index10 alt2"><code class="java spaces">            </code><code class="java plain">}</code></div>
<div class="line number12 index11 alt1"><code class="java spaces">        </code><code class="java plain">});</code></div>
<div class="line number13 index12 alt2"><code class="java spaces">        </code><code class="java keyword">return</code> <code class="java plain">v;</code></div>
<div class="line number14 index13 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div>
<div class="line number15 index14 alt2"><code class="java plain">}</code></div>
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<p><strong>fragment_acitivity_1.xml</strong> : FragmentActivity layout。(2012-05-07修改) FragmentActivity 只用來當容器，而不真正呈現內容 (僅把 Fragment 內容載入)。</p>
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<div class="line number1 index0 alt2"><code class="xml plain">&lt;?</code><code class="xml keyword">xml</code> <code class="xml color1">version</code><code class="xml plain">=</code><code class="xml string">"1.0"</code> <code class="xml color1">encoding</code><code class="xml plain">=</code><code class="xml string">"utf-8"</code><code class="xml plain">?&gt;</code></div>
<div class="line number2 index1 alt1"><code class="xml plain">&lt;</code><code class="xml keyword">LinearLayout</code> <code class="xml color1">xmlns:android</code><code class="xml plain">=</code><code class="xml string">"<a href="http://schemas.android.com/apk/res/android" target="_blank" rel="noopener nofollow external noreferrer" data-wpel-link="external" class="wpel-icon-right">http://schemas.android.com/apk/res/android<span class="wpel-icon wpel-image wpel-icon-6"></span></a>"</code></div>
<div class="line number3 index2 alt2"><code class="xml spaces">    </code><code class="xml color1">android:layout_width</code><code class="xml plain">=</code><code class="xml string">"fill_parent"</code></div>
<div class="line number4 index3 alt1"><code class="xml spaces">    </code><code class="xml color1">android:layout_height</code><code class="xml plain">=</code><code class="xml string">"fill_parent"</code></div>
<div class="line number5 index4 alt2"><code class="xml spaces">    </code><code class="xml color1">android:orientation</code><code class="xml plain">=</code><code class="xml string">"vertical"</code></div>
<div class="line number6 index5 alt1"><code class="xml spaces">    </code><code class="xml color1">android:id</code><code class="xml plain">=</code><code class="xml string">"@+id/simple_fragment"</code><code class="xml plain">&gt;</code></div>
<div class="line number7 index6 alt2"><code class="xml plain">&lt;/</code><code class="xml keyword">LinearLayout</code><code class="xml plain">&gt;</code></div>
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<p><strong>fragment1.xml</strong>：Fragment layout，FragmentActivity 載入的真正內容。</p>
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<div class="line number5 index4 alt2">05</div>
<div class="line number6 index5 alt1">06</div>
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</td>
<td class="code">
<div class="container">
<div class="line number1 index0 alt2"><code class="actionscript3 plain">&lt;?xml version=</code><code class="actionscript3 string">"1.0"</code> <code class="actionscript3 plain">encoding=</code><code class="actionscript3 string">"utf-8"</code><code class="actionscript3 plain">?&gt;</code></div>
<div class="line number2 index1 alt1"><code class="actionscript3 plain">&lt;LinearLayout xmlns:android=</code><code class="actionscript3 string">"<a href="http://schemas.android.com/apk/res/android" target="_blank" rel="noopener nofollow external noreferrer" data-wpel-link="external" class="wpel-icon-right">http://schemas.android.com/apk/res/android<span class="wpel-icon wpel-image wpel-icon-6"></span></a>"</code></div>
<div class="line number3 index2 alt2"><code class="actionscript3 spaces">    </code><code class="actionscript3 plain">android:layout_width=</code><code class="actionscript3 string">"fill_parent"</code></div>
<div class="line number4 index3 alt1"><code class="actionscript3 spaces">    </code><code class="actionscript3 plain">android:layout_height=</code><code class="actionscript3 string">"fill_parent"</code></div>
<div class="line number5 index4 alt2"><code class="actionscript3 spaces">    </code><code class="actionscript3 plain">android:orientation=</code><code class="actionscript3 string">"vertical"</code><code class="actionscript3 plain">&gt;</code></div>
<div class="line number6 index5 alt1"><code class="actionscript3 spaces">    </code><code class="actionscript3 plain">&lt;Button</code></div>
<div class="line number7 index6 alt2"><code class="actionscript3 spaces">        </code><code class="actionscript3 plain">android:id=</code><code class="actionscript3 string">"@+id/button2"</code></div>
<div class="line number8 index7 alt1"><code class="actionscript3 spaces">        </code><code class="actionscript3 plain">android:layout_width=</code><code class="actionscript3 string">"wrap_content"</code></div>
<div class="line number9 index8 alt2"><code class="actionscript3 spaces">        </code><code class="actionscript3 plain">android:layout_height=</code><code class="actionscript3 string">"wrap_content"</code></div>
<div class="line number10 index9 alt1"><code class="actionscript3 spaces">        </code><code class="actionscript3 plain">android:text=</code><code class="actionscript3 string">"Button"</code> <code class="actionscript3 plain">/&gt;</code></div>
<div class="line number11 index10 alt2"><code class="actionscript3 plain">&lt;/LinearLayout&gt;</code></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<p>最後別忘了在 AndroidManifest.xml 中加入<strong>android:configChanges=&#8221;orientation&#8221; </strong>設定。這樣就成功的使用<strong><span style="color: #ff0000;">在 Activity 中使用 Tabhost並且透過 FragmentActivity 來管理 Fragment </span></strong>囉！</p>
<p>2013-01-30 許多網友反應無法下載 MediaFire 的檔案，補上新連結。<a href="https://noter.tw/dn/Fragment.rar" target="_blank" rel="noopener noreferrer" data-wpel-link="internal">範例檔下載</a>。</p>
<p>2012-10-22 <a href="http://www.mediafire.com/?5z0azaqi46kng06" target="_blank" rel="noopener noreferrer nofollow external" data-wpel-link="external" class="wpel-icon-right">範例檔下載<span class="wpel-icon wpel-image wpel-icon-6"></span></a></p>
<p>這篇文章 <a rel="nofollow" href="https://noter.tw/2125/android-tabhost-with-fragmentactivity/" data-wpel-link="internal">Android Tabhost with FragmentActivity</a> 最早出現於 <a rel="nofollow" href="https://noter.tw" data-wpel-link="internal">記下來</a>。</p>
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