GeoQuiz项目总结

项目开发前的准备

1、首先创建新项目

 

项目中包含的目录如下：

 

2、设计界面

 

activity_quiz.xml中的源码为：

<TextView
           android:id="@+id/question_text_view"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:padding="24dp"
           android:text="@string/question_australia"/>

    <LinearLayout
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:orientation="horizontal">

     <Button
         android:id="@+id/true_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/true_button" />

     <Button
         android:id="@+id/false_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/false_button" />


 </LinearLayout>

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <ImageButton android:id="@+id/prev_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/arrow_left"
        android:text="@string/prev"/>

    <Button
        android:id="@+id/cheat_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/cheat_button" />

    <ImageButton android:id="@+id/next_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/arrow_right"
        android:text="@string/next"/>
</LinearLayout>

字符串需在spring.xml中设置好

<resources>
    <string name="app_name">JGG</string>
    <string name="question_australia">Canberra is the capital of Australia.</string>

    <string name="question_oceans">The Pacific Ocean is larger than the Atlantic Ocean.</string>
    <string name="question_mideast">The Suez Canal connects the Red Sea and the Indian Ocean.</string>
    <string name="question_africa">The source of the Nile River is in Egypt.</string>
    <string name="question_americas">The Amazon River is the longest river in the Americas.</string>
    <string name="question_asia">Lake Baikal is the world\'s oldest and deepest freshwater lake.</string>

    <string name="true_button">True</string>
    <string name="false_button">False</string>
    <string name="next_button">Next</string>
    <string name="correct_toast">Correct!</string>
    <string name="incorrect_toast">Incorrect!</string>

    <string name="warning_text">Are you sure you want to do this?</string>
    <string name="show_answer_button">SHOW ANSWER</string>
    <string name="cheat_button">CHEAT!</string>
    <string name="judgment_toast">Cheating is wrong.</string>
    
    <string name="next">NEXT</string>
    <string name="prev">PTEV</string>
</resources>
3、从布局XML到视图对象

1）在这三个中实现从布局到视图：

2）创建提示信息：

private void checkAnswer(boolean userPressedTrue) {
    boolean answerIsTrue = mQuestionBank[mCurrentIndex].isAnswerTrue();
    int messageResId = 0;
    if (mIsCheater) {
        messageResId = R.string.judgment_toast;
    } else {
    if (userPressedTrue == answerIsTrue) { messageResId = R.string.correct_toast;
    } else {
        messageResId = R.string.incorrect_toast;
    }
    Toast.makeText(this, messageResId, Toast.LENGTH_SHORT).show();
    }
}

3）资源ID获取相应的资源：

activity_quiz.xml布局的资源ID为R.layout.activity_quiz

 

4）设置监听器：

mTrueButton.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v){
          
            }
 });

 4、Android与MVC设计模式

如图展示了单机按钮事件时，对象间的交互控制数据流：

 

 

5.Activity的生命周期

创建水平模式布局

源码为

<TextView
    android:id="@+id/question_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:padding="24dp"
    android:text="@string/question_australia"/>

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical|center_horizontal"
    android:orientation="horizontal">

    <Button
        android:id="@+id/true_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/true_button" />

    <Button
        android:id="@+id/false_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/false_button" />


</LinearLayout>


<Button android:id="@+id/cheat_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|center"
    android:text="@string/cheat_button" />


<ImageButton
    android:id="@+id/next_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/arrow_right"
    android:drawablePadding="4dp"
    android:layout_gravity="bottom|right"/>

<ImageButton
    android:id="@+id/prev_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/arrow_left"
    android:drawablePadding="4dp"
    android:layout_gravity="bottom|left"/>

6、第二个Activity

创建第二个activity，布局为activity_cheat.xml:

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="24dp"
    android:text="@string/warning_text"/>

    <TextView
        android:id="@+id/answer_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="24dp"
        tools:text="Answer" />

    <Button
    android:id="@+id/show_answer_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/show_answer_button"/>

 

启用CheatActivity

通过startActivity()方法

 

 

 

 

mCheatButton = (Button)findViewById(R.id.cheat_button); 
mCheatButton.setOnClickListener(new View.OnClickListener() {    
 @Override   
      public void onClick(View v) {        
            Intent i = new Intent(QuizActivity.this, CheatActivity.class); 
            startActivity(i);    
       } 
})