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Ich erstelle ein Formular, in dem ich einige EditText und einige TextView angegeben habe. Endlich habe ich eine Checkbox wie folgt angegeben:Checkbox wird nicht angezeigt
<CheckBox
android:id="@+id/sendAsSMS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send As SMS"
android:checked="false"
android:textSize="16sp"
/>
Aber dieses Kontrollkästchen nicht im Layout angezeigt wurden, wenn die App läuft. Was läuft hier falsch? Meine volle layout.xml ist:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.schoolcounter.ui.activity.teacher.AddHomeworkActivity">
<LinearLayout
android:id="@+id/addHomeworkForm"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="16dp">
<LinearLayout
android:id="@+id/selectClassLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/select_class"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="end"
android:paddingRight="@dimen/text_padding"
android:paddingTop="@dimen/text_padding"
android:paddingBottom="@dimen/text_padding"
android:text="@string/select_class"
android:textAlignment="textEnd"
android:textColor="@color/colorPrimary"
android:textStyle="bold"
android:textSize="@dimen/text_size" />
<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner
android:id="@+id/select_class_spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="start"
android:hint="@string/select_class"
android:textAlignment="viewStart"
android:textColorHint="@color/colorHint"
android:textSize="@dimen/text_size" />
</LinearLayout>
<LinearLayout
android:id="@+id/selectSectionLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="@+id/select_section"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="end"
android:paddingRight="@dimen/text_padding"
android:paddingTop="@dimen/text_padding"
android:paddingBottom="@dimen/text_padding"
android:text="@string/select_section"
android:textAlignment="textEnd"
android:textColor="@color/colorPrimary"
android:textSize="@dimen/text_size"
android:textStyle="bold"/>
<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner
android:id="@+id/select_section_spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="start"
android:hint="@string/select_section"
android:textAlignment="viewStart"
android:textColorHint="@color/colorHint"
android:textSize="@dimen/text_size"/>
</LinearLayout>
<LinearLayout
android:id="@+id/selectSubjectLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/select_subject"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="end"
android:paddingRight="@dimen/text_padding"
android:paddingTop="@dimen/text_padding"
android:paddingBottom="@dimen/text_padding"
android:text="@string/select_subject"
android:textAlignment="textEnd"
android:textColor="@color/colorPrimary"
android:textSize="@dimen/text_size"
android:textStyle="bold"/>
<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner
android:id="@+id/select_subject_spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="start"
android:hint="@string/select_subject"
android:textAlignment="viewStart"
android:textColorHint="@color/colorHint"
android:textSize="@dimen/text_size"/>
</LinearLayout>
<LinearLayout
android:id="@+id/uploadedDateLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="@+id/textView_uploaded_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="end"
android:paddingRight="@dimen/text_padding"
android:paddingTop="@dimen/text_padding"
android:paddingBottom="@dimen/text_padding"
android:text="@string/text_uploaded_date"
android:textAlignment="textEnd"
android:textColor="@color/colorPrimary"
android:textSize="@dimen/text_size"
android:textStyle="bold"/>
<EditText
android:id="@+id/editTextUploadedDate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="@dimen/text_size"
android:focusable="false"
android:focusableInTouchMode="false"/>
</LinearLayout>
<LinearLayout
android:id="@+id/completionDateLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="@+id/textView_completion_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="end"
android:paddingRight="@dimen/text_padding"
android:paddingTop="@dimen/text_padding"
android:paddingBottom="@dimen/text_padding"
android:text="@string/text_completion_date"
android:textAlignment="textEnd"
android:textColor="@color/colorPrimary"
android:textSize="@dimen/text_size"
android:textStyle="bold"/>
<EditText
android:id="@+id/editTextCompletionDate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="@dimen/text_size"
android:focusable="false"
android:focusableInTouchMode="false"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/textView_Homework"
android:text="@string/text_homework"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="@dimen/text_padding"
android:textColor="@color/colorPrimary"
android:textSize="@dimen/text_size"
android:textStyle="bold"/>
<EditText
android:id="@+id/editTextHomeworkText"
android:layout_width="match_parent"
android:layout_height="74dp"
android:ems="10"
android:inputType="textMultiLine"
android:textSize="@dimen/text_size"/>
<CheckBox
android:id="@+id/sendAsSMS"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send As SMS"
android:checked="false"
android:textSize="16sp"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical"
android:weightSum="1">
<Button
android:id="@+id/uploadHomeworkButton"
style="@style/button_style_corners"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:layout_marginBottom="16dp"
android:layout_marginTop="16dp"
android:text="@string/text_upload"
android:textAlignment="center"
android:textColor="@color/colorWhite" />
</LinearLayout>
</LinearLayout>
</ScrollView>