本文来源于:http://blog.csdn.net/zhubaitian/article/details/39293883
Robotium的测试类ActivityInstrumentationTestCase2是继承于Junit3的TestCase类，所以并没有提供Junit4的特性.如网上总结说的：
1、不能通过annotate的方式来识别子类的新特征，如不能实现@beforeclass，@afterclass等特征。只能通过写setup和teardown，
2、TestCase只能以test开头进行测试case书写。
那么有时我们并不想每次开始/完成一个case的时候都做一些重复的动作，也就是要实现Junit4的@beforeclass和@afterclass，该怎么办呢？
以SDK自带的Notepad测试用例作为例子，假如现在我们需要实现两个测试用例
1、testAddNoteCNTittle:创建一个中文标题的笔记
2、testAddNoteEngTitle:创建一个英文标题的笔记
根据实例提供的代码，在setup里面会初始化solo而在teardown里面会关闭所有打开的activities，也就是说每执行一个case都会重新初始化一次solo和关闭所有的activities：
@Override
public void setUp() throws Exception {
//setUp() is run before a test case is started.
//This is where the solo object is created.
super.setUp();
this.activity = this.getActivity();
this.solo = new Solo(getInstrumentation(), getActivity());
} @Override
public void tearDown() throws Exception {
//tearDown() is run after a test case has finished.
//finishOpenedActivities() will finish all the activities that have been opened during the test execution.
solo.finishOpenedActivities();
}
但事实上我们在这个脚本只是去创建两个Note，并不需要每执行完一个case都要去初始化solo和关闭所有activities。google后没有发现有现成的取代@beforeclass和@aferclass的方法。
以下本人的实现方法
package com.example.android.notepad.test; import com.robotium.solo.Solo;
import android.test.ActivityInstrumentationTestCase2;
import android.app.Activity; @SuppressWarnings("rawtypes")
public class TCCreateNote extends ActivityInstrumentationTestCase2{
private static Solo solo = null;
public Activity activity;
private static final int NUMBER_TOTAL_CASES = 2;
private static int run = 0;
private static Class<?> launchActivityClass;
//对应re-sign.jar生成出来的信息框里的两个值
private static String mainActiviy = com.example.android.notepad.NotesList";
private static String packageName = "com.example.android.notepad"; static {
try {
launchActivityClass = Class.forName(mainActiviy);
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
} @SuppressWarnings("unchecked")
public TCCreateNote() {
super(packageName, launchActivityClass);
} @Override
public void setUp() throws Exception {
//setUp() is run before a test case is started.
//This is where the solo object is created.
super.setUp();
//The variable solo has to be static, since every time after a case's finished, this class TCCreateNote would be re-instantiated
// which would lead to soto to re-instantiated to be null if it's not set as static
if(solo == null) {
TCCreateNote.solo = new Solo(getInstrumentation(), getActivity());
}
} @Override
public void tearDown() throws Exception {
//Check whether it's the last case executed.
run += countTestCases();
if(run >= NUMBER_TOTAL_CASES) {
solo.finishOpenedActivities();
}
} public void testAddNoteCNTitle() throws Exception {
solo.clickOnMenuItem("Add note");
solo.enterText(0, "中文标签笔记");
solo.clickOnMenuItem("Save");
solo.clickInList(0);
solo.clearEditText(0);
solo.enterText(0, "Text 1");
solo.clickOnMenuItem("Save");
solo.assertCurrentActivity("Expected NotesList Activity", "NotesList");
solo.clickLongOnText("中文标签笔记");
solo.clickOnText("Delete");
} public void testAddNoteEngTitle() throws Exception {
solo.clickOnMenuItem("Add note");
solo.enterText(0, "English Title Note");
solo.clickOnMenuItem("Save");
solo.clickInList(0);
solo.clearEditText(0);
solo.enterText(0, "Text 1");
solo.clickOnMenuItem("Save");
solo.assertCurrentActivity("Expected NotesList Activity", "NotesList");
solo.clickLongOnText("English Title Note");
solo.clickOnText("Delete");
}
}