乐学成语项目的实现
Posted qq_29310771
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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了乐学成语项目的实现相关的知识，希望对你有一定的参考价值。
首先给软件取名为HappyIdiom,在开始编码之前，需要先对程序进行需求分析，想一想HappyIdiom中应该具备哪些功能。将这些功能全部整理出来之后，我们才好动手一一实现。这里我认为HappyIdiom中至少应该具备以下功能：
1.成语分类学习：你可以根据自己喜欢的分类（动物类、人物类、季节类、自然类、数字类、语言类、其他类）来进行学习。
2.乐猜成语：学习之余玩玩猜成语游戏，寓教于乐。
3.成语收藏：当用户遇到自己想要保存的成语，点击保存按钮，即保存到收藏页面以方便用户再次查看，对已经掌握的成语，用户可以从收藏夹中删除。
4.成语查询：支持首字母查询，如一心一意可输入：yxyy。
虽然看上去只有四个主要的功能点，但如果想要全部实现这些功能却用到UI/网络、数据存储等技术，因此还是非常考验综合能力的。
分析完了需求之后，接下来就要进行技术的可行性分析了。首先要考虑的一个问题就是，我们如何才能得到所有的成语数据，以及如何才能获取每个成语的读音，解释，近义词反义词等信息。聚合网给我们提供了免费的聚合数据，网址如下：https://www.juhe.cn/docs/api/id/157 也可以从网上查找。
获取了数据库版本之后，就开始创建HappyIdiom这个项目了，在Eclipse中新建一个android项目，项目名叫做HappyIdiom，包名叫做cn.edu.bztc.HappyIdiom，使用的是4.2的API，如图所示：
创建好了之后，然后再创建几个包，如图所示：
在res目录下新建raw目录，将idioms.db数据库复制到此目录下。这是因为raw目录的东西，android会原封不动的拷贝到程序中，而不会转换为二进制文件。在db包下新建一个DBOpenHelper类，代码如下：
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</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">try</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">File</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> myDataPath </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">new</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">File</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">DB_PATH</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">if</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(!</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">myDataPath</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">exists</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">())</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
myDataPath</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">mkdirs</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">();</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">String</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> dbfile </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> myDataPath </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">+</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"/"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">+</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> DB_NAME</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">if</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(!(</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">new</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">File</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">dbfile</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">).</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">exists</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">()))</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">InputStream</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">is</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> context</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">getResources</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">().</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">openRawResource</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
R</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">raw</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">idioms</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">FileOutputStream</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> fos </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">new</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">FileOutputStream</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">dbfile</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">byte</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">[]</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> buffer </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">new</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">byte</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">[</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">BUFFER_SIZE</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">];</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">int</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> count </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">0</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">while</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">((</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">count </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">is</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">read</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">buffer</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">))</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">0</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
fos</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">write</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">buffer</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">0</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> count</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
fos</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">close</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">();</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">is</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">close</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">();</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">SQLiteDatabase</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> db </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">SQLiteDatabase</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">openOrCreateDatabase</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">dbfile</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">null</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">return</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> db</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">catch</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">FileNotFoundException</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> e</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Log</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">e</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"Database"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"File not found"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
e</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">printStackTrace</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">();</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">catch</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">IOException</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> e</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Log</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">e</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"Dtaabase"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"IO exception"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
e</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">printStackTrace</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">();</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">return</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">null</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span>上面的代码功能主要是使用输出流将idioms.db复制到手机中默认存放数据库的位置。
接下来在test包下，新建DBOpenHelperTest继承AndoidTestCase。代码如下：
<span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">package</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> cn</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">edu</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">bztc</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">happyidiom</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">test</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">import</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> cn</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">edu</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">bztc</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">happyidiom</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">db</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">DBOpenHelper</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">import</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> android</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">test</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">AndroidTestCase</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">public</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">class</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">DBOpenHelperTest</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">extends</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">AndroidTestCase</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">public</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">void</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> testDBCopy</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">()</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">DBOpenHelper</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> dbOpenHelper </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102以上是关于乐学成语项目的实现的主要内容，如果未能解决你的问题，请参考以下文章
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