Java android中的第二个按钮不可见

对于

文本视图

，

射线组

，

单选按钮

，

编辑文本

和

按钮

s。 在添加<代码>重置按钮之前，应用程序一直正常运行。此应用程序运行后，

reset按钮

不可见。 我认为布局之间有一个错误，也许我应该使用另一种布局组合，我不知道。 谢谢你的帮助

In the activity_main.xml is used 
- ScrollView
- LinearLayout
- RelativeLayout

**activity\u layout.xml**
styles.xml
#FFC107
#E65100
#EF6C00
包装内容
包装内容
真的
10dp
10dp
16便士
正常的
#EF6C00
包装内容
包装内容
6dp
6dp
15便士
斜体
#000000
14便士
#FFAB00
包装内容
包装内容
大胆的
6dp
colors.xml
#FFC107
#E65100
#EF6C00
#EF6C00
#FB8C00
#FFFFFF

使用您的代码，我得到了这个输出。你想要这个还是别的什么。 我已经把你的代码放在这里面了

   **activity_layout.xml**


    <?xml version="1.0" encoding="utf-8"?>
    <ScrollView
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.allyouask.hungryforhistory.MainActivity">

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

            <TextView
                android:id="@+id/welcomeMessage"
                android:layout_height="wrap_content"
                android:layout_width="wrap_content"
                style="@style/welcomeMessage"
                android:fontFamily="sans-serif-light"
                android:text="Welcome to Hungry For History!\n         Let's get started!"
                android:layout_centerHorizontal="true"/>

            <TextView
                android:id="@+id/inputQuestion"
                android:layout_height="wrap_content"
                android:layout_width="wrap_content"
                style="@style/QuestionsStyle"
                android:text=" Who was the king of the Gods in Ancient Greece:"
                android:layout_below="@+id/welcomeMessage"/>

            <EditText
                android:id="@+id/inputAnswer"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/inputQuestion"/>

            <TextView
                android:id="@+id/firstQuestion"
                style="@style/QuestionsStyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/inputAnswer"
                android:paddingLeft="5dp"
                android:text="Who was born in Ancient City Stagira, Greece?"/>


            <RadioGroup
                android:id="@+id/firstGroupRadioButtons"
                android:layout_below="@+id/firstQuestion"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"/>

            <RadioButton
                android:id="@+id/firstLeftRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/firstGroupRadioButtons"
                android:text="Aristotle"
                android:onClick="onRadioButtonClicked"/>

            <RadioButton
                android:id="@+id/firstRightRadioButton"
                android:layout_below="@+id/firstGroupRadioButtons"
                style="@style/RadioButtonStyle"
                android:layout_toRightOf="@+id/firstLeftRadioButton"
                android:text="Pythagoras"
                android:onClick="onRadioButtonClicked"/>

            <TextView
                android:id="@+id/secondQuestion"
                style="@style/QuestionsStyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/firstLeftRadioButton"
                android:paddingLeft="5dp"
                android:text="Who said in his last speech:With malice toward none;...let us strive on to finish the work we are in;to bind up the nation's wounds;into care for him who shall have borne the battle and for his widow and his orphans?"/>

            <RadioGroup
                android:id="@+id/secondGroupRadioButtons"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@id/secondQuestion"
                android:orientation="horizontal"/>
            <RadioButton
                android:id="@+id/secondLeftRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_alignParentLeft="true"
                android:layout_below="@+id/secondGroupRadioButtons"
                android:text="William McKinley"
                android:onClick="onRadioButtonClicked"/>

            <RadioButton
                android:id="@+id/secondRightRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/secondGroupRadioButtons"
                android:layout_toRightOf="@+id/secondLeftRadioButton"
                android:text="Abraham Lincoln"
                android:onClick="onRadioButtonClicked"/>

            <TextView
                android:id="@+id/thirdQuestion"
                style="@style/QuestionsStyle"
                android:layout_below="@+id/secondLeftRadioButton"
                android:paddingLeft="5dp"
                android:text="Where the An Lushan Rebellion took place?"/>

            <RadioGroup
                android:id="@+id/thirdGroupRadioButtons"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/thirdQuestion"
                android:orientation="horizontal"/>

            <RadioButton
                android:id="@+id/thirdLeftRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/thirdGroupRadioButtons"
                android:text="China"
                android:onClick="onRadioButtonClicked"/>

            <RadioButton
                android:id="@+id/thirdRightRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/thirdGroupRadioButtons"
                android:layout_toRightOf="@+id/thirdLeftRadioButton"
                android:text="Thailand"
                android:onClick="onRadioButtonClicked"/>

            <TextView
                android:id="@+id/fourthQuestion"
                style="@style/QuestionsStyle"
                android:layout_below="@+id/thirdLeftRadioButton"
                android:text="Who was the most famous exemplar of absolute monarchy in France?"/>


            <RadioGroup
                android:id="@+id/fourthGroupRadioButtons"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/fourthQuestion"
                android:orientation="horizontal"/>

            <RadioButton
                android:id="@+id/fourthLeftRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/fourthGroupRadioButtons"
                android:text="Louis XIV"
                android:onClick="onRadioButtonClicked"/>

            <RadioButton
                android:id="@+id/fourthRightCheckBox"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/fourthGroupRadioButtons"
                android:layout_toRightOf="@+id/fourthLeftRadioButton"
                android:text="Michael I"
                android:onClick="onRadioButtonClicked"/>

            <TextView
                android:id="@+id/fifthQuestion"
                style="@style/QuestionsStyle"
                android:layout_below="@+id/fourthLeftRadioButton"
                android:text="When Alexander The Great lived?"/>

            <RadioGroup
                android:id="@+id/fifthGroupRadioButtons"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@id/fifthQuestion"
                android:orientation="horizontal"/>

            <RadioButton
                android:id="@+id/fifthLeftRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/fifthGroupRadioButtons"
                android:text="330-323 BC"
                android:onClick="onRadioButtonClicked"/>

            <RadioButton
                android:id="@+id/fifthRightRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/fifthGroupRadioButtons"
                android:layout_toRightOf="@+id/fifthLeftRadioButton"
                android:text="336-323 BC"
                android:onClick="onRadioButtonClicked"/>

            <TextView
                android:id="@+id/sixthQuestion"
                style="@style/QuestionsStyle"
                android:layout_below="@+id/fifthLeftRadioButton"
                android:text="Where Albert Einstein studied?"/>

            <RadioGroup
                android:id="@+id/sixthGroupRadioButtons"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@id/sixthQuestion"
                android:orientation="horizontal"/>

            <RadioButton
                android:id="@+id/sixthLeftRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/sixthGroupRadioButtons"
                android:text="University of Zurich"
                android:onClick="onRadioButtonClicked"/>

            <RadioButton
                android:id="@+id/sixthRightRadioButton"
                style="@style/RadioButtonStyle"
                android:layout_below="@+id/sixthGroupRadioButtons"
                android:layout_toRightOf="@+id/sixthLeftRadioButton"
                android:text="University of Germany"
                android:onClick="onRadioButtonClicked"/>

            <TextView
                android:id="@+id/seventhQuestion"
                style="@style/QuestionsStyle"
                android:layout_below="@+id/sixthLeftRadioButton"
                android:text="What was the main interest of Democritus?"/>

            <RadioGroup
                android:id="@+id/seventhGroupRadioButtons"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/seventhQuestion"
                android:orientation="horizontal">

                <RadioButton
                    android:id="@+id/seventhLeftRadioButton"
                    style="@style/RadioButtonStyle"
                    android:layout_below="@+id/seventhGroupRadioButtons"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Mathematics-Astronomy"
                    android:onClick="onRadioButtonClicked"/>

                <RadioButton
                    android:id="@+id/seventhRightRadioButton"
                    style="@style/RadioButtonStyle"
                    android:layout_below="@+id/seventhGroupRadioButtons"
                    android:layout_toRightOf="@+id/seventhLeftRadioButtons"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Philosophy-Psychology"
                    android:onClick="onRadioButtonClicked"/>
            </RadioGroup>

            <Button
                android:id="@+id/submitButton"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/backgroundColor"
                android:layout_marginBottom="4dp"
                android:text="Submit"
                android:textColor="@color/textColor"
                android:onClick="OnClick"
                android:layout_alignParentBottom="true"/>

            <Button
                android:id="@+id/resetButton"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="2dp"
                android:layout_marginBottom="3dp"
                android:onClick="OnClick"
                android:background="@color/backgroundResetColor"
                android:textColor="@color/textColor"
                android:text="Reset"
                android:textAllCaps="true"
                android:layout_below="@+id/submitButton"/>
        </RelativeLayout>
        </LinearLayout>
    </ScrollView>

    styles.xml
    <resources>

        <!-- Base application theme. -->
        <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
            <!-- Customize your theme here. -->
            <item name="colorPrimary">#FFC107</item>
            <item name="colorPrimaryDark">#E65100</item>
            <item name="colorAccent">#EF6C00</item>
        </style>

        <style name="welcomeMessage">
            <item name="android:layout_width">wrap_content</item>
            <item name="android:layout_height">wrap_content</item>
            <item name="android:layout_centerHorizontal">true</item>
              <item name="android:paddingTop">10dp</item>
                <item name="android:paddingBottom">10dp</item>
            <item name="android:textSize">16sp</item>
            <item name="android:textStyle">normal</item>
            <item name="android:textColor">#EF6C00</item>
        </style>

        <style name="QuestionsStyle">
            <item name="android:layout_width">wrap_content</item>
            <item name="android:layout_height">wrap_content</item>
            <item name="android:paddingLeft">6dp</item>
            <item name="android:paddingRight">6dp</item>
            <item name="android:textSize">15sp</item>
            <item name="android:textStyle">italic</item>
            <item name="android:textColor">#000000</item>
        </style>

        <style name="RadioButtonStyle">
         <item name="android:textSize">14sp</item>
            <item name="android:textColor">#FFAB00</item>
            <item name="android:layout_width">wrap_content</item>
            <item name="android:layout_height">wrap_content</item>
            <item name="android:textStyle">bold</item>
            <item name="android:paddingLeft">6dp</item>

        </style>

colors.xml
   <?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#FFC107</color>
    <color name="colorPrimaryDark">#E65100</color>
    <color name="colorAccent">#EF6C00</color>

    <!-- Button Colors -->
<color name="backgroundColor">#EF6C00</color>
    <color name="backgroundResetColor">#FB8C00</color>
    <color name="textColor">#FFFFFF</color>
</resources>     



        </resources>

---

这个结果我需要，但在我的手机里我看不到重置按钮我不知道问题是否是因为我今天和昨天都收到了警告，我无法想象其他的事情我只是做了一个测试，当重置按钮在其他地方，而不是在submitButton下面时，resetButton是fine无法识别它，我尝试了您的建议，但当resetButton位于Submit按钮下方时，所有设计都消失了，如颜色和文本。@ElenJ您必须将

submitButton

放在哪里。

 <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

         // your code here..

        </RelativeLayout>

    </ScrollView>

 <Button
                android:id="@+id/submitButton"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/seventhGroupRadioButtons"
                android:layout_marginBottom="4dp"
                android:layout_marginTop="10dp"
                android:background="@android:color/black"
                android:onClick="OnClick"
                android:text="Submit"
                android:textColor="@android:color/white" />

            <Button
                android:id="@+id/resetButton"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/submitButton"
                android:layout_marginBottom="3dp"
                android:layout_marginTop="2dp"
                android:onClick="OnClick"
                android:text="Reset"
                android:textAllCaps="true"
                android:textColor="@android:color/black" />