我正在使用自定义的底部对话框，只是一个附加在屏幕底部的对话框
这是代码
我的问题是，当我在此对话框中对视图进行动画处理（折叠/展开）时，在屏幕底部出现黑色间隙，我只希望对话框的底部固定并且在顶部对话框的更改。
这是视频。 https://youtu.be/bU3elAE-eBU
我尝试了不同的动画，但是得到了相同的结果。
动画
public class ViewAnimationUtils {
public static void expandOrCollapse(final View v,String exp_or_colpse) {
TranslateAnimation anim = null;
if(exp_or_colpse.equals("expand"))
{
anim = new TranslateAnimation(0.0f, 0.0f, -v.getHeight(), 0.0f);
v.setVisibility(View.VISIBLE);
}
else{
anim = new TranslateAnimation(0.0f, 0.0f, 0.0f, -v.getHeight());
Animation.AnimationListener collapselistener= new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
v.setVisibility(View.GONE);
}
};
anim.setAnimationListener(collapselistener);
}
// To Collapse
//
anim.setDuration(300);
anim.setInterpolator(new AccelerateInterpolator(0.5f));
v.startAnimation(anim);
}
public static void expand(final View v) {
v.measure(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
final int targtetHeight = v.getMeasuredHeight();
v.getLayoutParams().height = 0;
v.setVisibility(View.VISIBLE);
Animation a = new Animation()
{
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
v.getLayoutParams().height = interpolatedTime == 1
? ViewGroup.LayoutParams.WRAP_CONTENT
: (int)(targtetHeight * interpolatedTime);
v.requestLayout();
}
@Override
public boolean willChangeBounds() {
return true;
}
};
a.setDuration(200);
v.startAnimation(a);
}
public static void collapse(final View v) {
final int initialHeight = v.getMeasuredHeight();
Animation a = new Animation()
{
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
if(interpolatedTime == 1){
v.setVisibility(View.GONE);
}else{
v.getLayoutParams().height = initialHeight - (int)(initialHeight * interpolatedTime);
v.requestLayout();
}
}
@Override
public boolean willChangeBounds() {
return true;
}
};
a.setDuration(100);
v.startAnimation(a);
}
}
这是xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="16dp"
android:focusableInTouchMode="true"
android:layout_gravity="bottom">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none">
<androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="0dp"
android:layout_height="48dp"
android:textSize="16sp"
android:textColor="@color/hard_white"
android:lineSpacingExtra="10sp"
android:gravity="center"
android:text="@string/continuee"
android:elevation="2dp"
android:textAllCaps="false"
android:background="@drawable/radius_background_lipstick"
android:id="@+id/btn_login" app:layout_constraintEnd_toEndOf="parent"
android:enabled="false"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
app:layout_constraintStart_toStartOf="parent"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
app:fontFamily="@font/akkuratprobold"
app:layout_constraintHorizontal_bias="0.0"
android:layout_marginTop="36dp"
app:layout_constraintTop_toBottomOf="@+id/textView17"
app:layout_constraintBottom_toBottomOf="parent" android:layout_marginBottom="8dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="13sp"
android:textColor="#747474"
android:text="Pound Sterling"
app:fontFamily="@font/akkuratproregular"
android:id="@+id/textView17"
app:layout_constraintTop_toBottomOf="@+id/textView18" android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="16dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#2d2d2d"
android:lineSpacingExtra="10sp"
android:text="Cash amount"
app:fontFamily="@font/akkuratprobold"
android:id="@+id/textView18"
android:layout_marginTop="48dp"
app:layout_constraintTop_toBottomOf="@+id/textView19" android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="16dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="15dp"
android:textSize="13sp"
android:textColor="#747474"
app:fontFamily="@font/akkuratproregular"
android:lineSpacingExtra="7sp"
android:text="Amount you’d like to buy"
android:id="@+id/textView19"
app:layout_constraintTop_toBottomOf="@+id/view" android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="16dp"
android:layout_marginTop="12dp"/>
<EditText
android:layout_width="100dp"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:gravity="center"
android:textSize="30sp"
android:background="#70FFFFFF"
android:textColor="#2d2d2d"
android:lineSpacingExtra="-4sp"
app:fontFamily="@font/akkuratproregular"
android:id="@+id/editText2"
android:text="100" app:layout_constraintEnd_toEndOf="@+id/btn_login"
android:layout_marginTop="8dp"
app:layout_constraintTop_toTopOf="@+id/textView18"
app:layout_constraintBottom_toBottomOf="@+id/textView17" app:layout_constraintVertical_bias="1.0"
app:layout_constraintStart_toEndOf="@+id/textView17" android:layout_marginStart="8dp"
android:layout_marginLeft="8dp" app:layout_constraintHorizontal_bias="1.0"/>
<View android:layout_width="379dp" android:layout_height="1dp"
android:background="@color/greyish"
android:alpha="0.5"
android:id="@+id/view"
app:layout_constraintTop_toBottomOf="@+id/constraintLayout5"
android:layout_marginStart="8dp" app:layout_constraintStart_toStartOf="parent"
android:layout_marginLeft="8dp" android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
android:layout_marginRight="8dp" android:layout_marginTop="16dp"/>
<View android:layout_width="379dp" android:layout_height="1dp"
android:background="@color/greyish"
android:alpha="0.5"
android:id="@+id/view2"
app:layout_constraintTop_toBottomOf="@+id/imageView9"
android:layout_marginTop="12dp" android:layout_marginStart="8dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp" app:layout_constraintEnd_toEndOf="parent"
android:layout_marginRight="8dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#2d2d2d"
android:lineSpacingExtra="10sp"
app:fontFamily="@font/akkuratprobold"
android:text="Order type"
android:id="@+id/textView20"
app:layout_constraintTop_toBottomOf="@+id/view2"
android:layout_marginTop="16dp" android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="16dp"/>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" android:layout_marginTop="8dp"
tools:layout_editor_absoluteX="0dp" app:layout_constraintTop_toBottomOf="@+id/textView20"
android:id="@+id/constraintLayout5"
android:visibility="gone">
<ImageView
android:layout_width="15dp"
android:layout_height="15dp" app:srcCompat="@drawable/ic_tick"
android:id="@+id/imageView13" app:layout_constraintEnd_toEndOf="parent"
android:layout_marginEnd="24dp" android:layout_marginRight="24dp"
app:layout_constraintTop_toTopOf="@+id/textView23"
app:layout_constraintBottom_toBottomOf="@+id/textView23"/>
<TextView
android:layout_width="0dp"
android:layout_height="40dp"
android:gravity="center|left"
android:textSize="16sp"
android:textColor="#2d2d2d"
android:lineSpacingExtra="10sp"
app:fontFamily="@font/akkuratprobold"
android:text="Cash"
android:id="@+id/textView23"
android:layout_marginEnd="16dp"
app:layout_constraintEnd_toEndOf="parent" android:layout_marginRight="16dp"
android:layout_marginStart="16dp" app:layout_constraintStart_toStartOf="parent"
android:layout_marginLeft="16dp" app:layout_constraintHorizontal_bias="0.0"
android:layout_marginTop="8dp" app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:layout_width="0dp"
android:layout_height="40dp"
android:gravity="center|left"
android:textSize="16sp"
android:textColor="#2d2d2d"
android:lineSpacingExtra="10sp"
app:fontFamily="@font/akkuratprobold"
android:text="Principal"
android:id="@+id/textView27"
android:layout_marginEnd="16dp"
app:layout_constraintEnd_toEndOf="parent" android:layout_marginRight="16dp"
android:layout_marginStart="16dp" app:layout_constraintStart_toStartOf="parent"
android:layout_marginLeft="16dp" app:layout_constraintHorizontal_bias="0.0"
android:layout_marginTop="8dp" app:layout_constraintTop_toBottomOf="@+id/textView23"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#2d2d2d"
android:lineSpacingExtra="10sp"
android:gravity="end"
app:fontFamily="@font/akkuratprobold"
android:text="Cash"
android:id="@+id/textView14"
app:layout_constraintTop_toBottomOf="@+id/view2"
android:layout_marginTop="16dp" app:layout_constraintEnd_toStartOf="@+id/imageView12"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="13sp"
android:textColor="#747474"
android:gravity="center_horizontal"
app:fontFamily="@font/akkuratproregular"
android:text="Senior Secured"
android:id="@+id/textView21"
app:layout_constraintTop_toBottomOf="@+id/textView22" android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="16dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="13sp"
android:textColor="#747474"
android:gravity="center_horizontal"
app:fontFamily="@font/akkuratproregular"
android:text="Order Type"
android:visibility="gone"
android:id="@+id/textView26"
app:layout_constraintTop_toBottomOf="@+id/view2" android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="16dp"
android:layout_marginTop="12dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#2d2d2d"
android:lineSpacingExtra="10sp"
android:text="Company"
app:fontFamily="@font/akkuratprobold"
android:id="@+id/textView22"
android:layout_marginTop="16dp"
app:layout_constraintTop_toTopOf="parent" android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="16dp"/>
<ImageView
android:layout_width="40dp"
android:padding="5dp"
android:layout_height="40dp" app:srcCompat="@drawable/aston_martin_logo"
android:id="@+id/imageView9" android:layout_marginTop="8dp"
app:layout_constraintTop_toTopOf="@+id/textView22"
android:background="@drawable/radius_corner_grey"
app:layout_constraintBottom_toBottomOf="@+id/textView21" app:layout_constraintEnd_toEndOf="parent"
android:layout_marginEnd="16dp" android:layout_marginRight="16dp"
app:layout_constraintVertical_bias="0.47"/>
<ImageView
android:layout_width="25dp"
android:layout_height="25dp" app:srcCompat="@drawable/ic_down"
android:id="@+id/imageView12" app:layout_constraintEnd_toEndOf="parent"
android:layout_marginEnd="16dp" android:layout_marginRight="16dp"
app:layout_constraintTop_toTopOf="@+id/textView14"
app:layout_constraintBottom_toBottomOf="@+id/textView14"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>