Android setTag()与getTag(),与set多个setTag()

标签：安卓   android开发   数据   对象   存储   

setTag是android的view类中很有用的一个方法，

在同一个类中，存取数据很方便，不用数据库建库，

也比sharePreference更节约内存。

setTag（Object tag)方法比较简单 

比如

TextView tvExecutor = (TextView)findViewById(R.id.t);

tvExecutor.setTag(selectedUserMap);

这个selectedUserMap 

可以使Map<String, String> selectedUserMap这个对象。

也可以是LinkedList<CarEntity> mList 这个对象。

       可以存储各种临时数据，但是还不能称其为存储方式。

      在同一个类中，我们可以使用setTag(),getTag(),存取数据。

      可不可以一个对象，设置多个Tag呢？答案是肯定的

在res/values/strings.xml中添加

<span face="Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif" style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;"><span style="line-height: 18px;"><span style="color:#cc0000;"><resources></span></span></span>

<span style="color:#cc0000;"><span face="Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif" style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;"><item type="id" name="tag_a</span><span style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; background-color: rgb(240, 240, 240);">"></item></span></span>

<span face="Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif" style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;"><span style="color:#cc0000;"><item type="id" name="tag_b"></item></span></span>

<span face="Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif" style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;"><span style="color:#cc0000;"></resources></span></span>

<span face="Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif" style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;">
</span>

在activity中，使用的时候写成

<span face="Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif" style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;"></span>

<code style="border: 0px; vertical-align: baseline; background-color: rgb(238, 238, 238); font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; padding: 0px; margin: 0px;"><span style="color:#cc0000;"><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;"><span style="font-family: Arial; font-size: 14px; line-height: 26px;">tvExecutor</span></span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">.</span><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">setTag</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">(</span><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">R</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">.</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;"><span color="#00008b">id.tag_a</span></span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">,</span><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;"> </span><span class="str" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">"逗比"</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">);</span><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">
<span style="font-family: Arial; font-size: 14px; line-height: 26px;">tvExecutor</span></span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">.</span><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">setTag</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">(</span><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">R</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">.</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;"><span color="#00008b">id.tag_b</span></span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">,</span><span class="pln" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;"> </span><span class="str" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">"2货"</span><span class="pun" style="border: 0px; vertical-align: baseline; background-color: transparent; padding: 0px; margin: 0px;">);</span></span></code>

Android setTag()与getTag(),与set多个setTag()

标签：安卓   android开发   数据   对象   存储   

原文地址：http://blog.csdn.net/kan1kan5/article/details/39755191