英文:
How to add cardview programmatically inside view but use layout declared in xml?
问题
如何在LinearLayout内添加CardView，并访问CardView内部的TextView以更新值？在犹豫了很长时间后，我仍然没有解决方案。谢谢。
这是fragment_sub_main.xml文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".SubMainFragment"
android:animateLayoutChanges="true"
android:id="@+id/relative_sub">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="@+id/top_toolbar"
style="@style/Widget.AppTheme.AppBar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<LinearLayout
android:id="@+id/lin_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:ignore="NotSibling">
<include
android:id="@+id/syarat"
layout="@layout/sub_service_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="64dp"
android:layout_marginEnd="16dp" />
</LinearLayout>
<LinearLayout
android:id="@+id/lin_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/lin_1">
<include layout="@layout/sub_service_card"
android:id="@+id/langkah"
android:layout_marginTop="8dp"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:id="@+id/lin_3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/lin_2">
<include layout="@layout/sub_service_card"
android:id="@+id/lampiran"
android:layout_marginTop="8dp"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>
以下是sub_service_card.xml文件的内容：
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:strokeWidth="0dp"
app:strokeColor="@android:color/darker_gray"
app:cardElevation="1dp"
app:cardCornerRadius="16dp"
app:cardPreventCornerOverlap="false">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="16dp">
<com.google.android.material.textview.MaterialTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Syarat Pengajuan UP"
android:textAppearance="?attr/textAppearanceHeadline6" />
</LinearLayout>
</com.google.android.material.card.MaterialCardView>
以下是expanded_card.xml文件的内容：
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="wrap_content"
app:strokeWidth="4dp"
app:strokeColor="#C6C6C6"
android:layout_marginTop="8dp"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
app:cardElevation="0dp"
android:animateLayoutChanges="true"
app:cardBackgroundColor="@color/colorPrimaryDark">
<com.google.android.material.textview.MaterialTextView
android:id="@+id/text_in_card"
android:padding="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/pengUP"
android:textAppearance="?attr/textAppearanceBody2"/>
</com.google.android.material.card.MaterialCardView>
以下是SubMainFragment中的onCreateView方法：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View view = inflater.inflate(R.layout.fragment_sub_main,
<details>
<summary>英文:</summary>
How to add cardview inside Linearlayout, and access the textview inside the cardview to update the value? I still didn't have the solution after wondering around for a long time. Thanks
[Here's what I want][1]
[1]: https://i.stack.imgur.com/fRlE8.png
This is the fragment_sub_main.xml
```<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".SubMainFragment"
android:animateLayoutChanges="true"
android:id="@+id/relative_sub">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="@+id/top_toolbar"
style="@style/Widget.AppTheme.AppBar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<LinearLayout
android:id="@+id/lin_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:ignore="NotSibling">
<include
android:id="@+id/syarat"
layout="@layout/sub_service_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="64dp"
android:layout_marginEnd="16dp" />
</LinearLayout>
<LinearLayout
android:id="@+id/lin_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/lin_1">
<include layout="@layout/sub_service_card"
android:id="@+id/langkah"
android:layout_marginTop="8dp"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:id="@+id/lin_3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/lin_2">
<include layout="@layout/sub_service_card"
android:id="@+id/lampiran"
android:layout_marginTop="8dp"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>
Here's the sub_service_card
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:strokeWidth="0dp"
app:strokeColor="@android:color/darker_gray"
app:cardElevation="1dp"
app:cardCornerRadius="16dp"
app:cardPreventCornerOverlap="false">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="16dp">
<com.google.android.material.textview.MaterialTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Syarat Pengajuan UP"
android:textAppearance="?attr/textAppearanceHeadline6" />
</LinearLayout>
</com.google.android.material.card.MaterialCardView>
This is the expanded_card
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="wrap_content"
app:strokeWidth="4dp"
app:strokeColor="#C6C6C6"
android:layout_marginTop="8dp"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
app:cardElevation="0dp"
android:animateLayoutChanges="true"
app:cardBackgroundColor="@color/colorPrimaryDark">
<com.google.android.material.textview.MaterialTextView
android:id="@+id/text_in_card"
android:padding="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/pengUP"
android:textAppearance="?attr/textAppearanceBody2"/>
</com.google.android.material.card.MaterialCardView>
This is the oncreateview method in SubMainFragment
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View view = inflater.inflate(R.layout.fragment_sub_main, container, false);
final LinearLayout lin1 = view.findViewById(R.id.lin_1);
final MaterialCardView syaratView = lin1.findViewById(R.id.syarat);
final View view1 = getLayoutInflater().inflate(R.layout.expanded_card, lin1, false);
final MaterialTextView textExpandView = (MaterialTextView) (view1.findViewById(R.id.text_in_card));
syaratView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "Clicked");
textExpandView.setText(MainActivity.Langkah);
lin1.addView(view1);
//view1.addView(textExpandView);
}
});```
</details>
# 答案1
**得分**: 0
根据我的理解，您想要进行视图动画的代码翻译如下：
在您的注释中提到，您需要处理可见性。我很高兴看到它能够正常工作。
根据您的需求，您可以尝试以下方法来实现平滑效果：
**在布局中：**
```xml
android:animateLayoutChanges="true"
当可见性变为不可见时，进行淡出动画：
view.animate().alpha(0.0f);
当可见性变为可见时，进行淡入动画：
view.animate().alpha(1.0f);
请注意，上述代码是针对Android视图动画的示例。如果您需要更多关于Android开发方面的帮助，请随时提问。
英文:
As i write in comment you have to deal with visiblity and. I'm happy to see that it works
as you say you want to make this smooth then try this:
In layout
android:animateLayoutChanges="true"
Fade out animation while visibltity invisible
view.animate().alpha(0.0f);
Fade in animation while visiblity visible
view.animate().alpha(1.0f);
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