我正在使用 ConstraintLayout 进行布局。我正在创建 BottomSheetDialog 并将布局设置为使用顶部的 ConstraintLayout 。
注意:如果我使用LinearLayout一切正常,BottomSheetDialog需要适当的高度但是当我使用时 ConstraintLayout,它只显示一个选项。
当我使用ConstraintLayout时,请查看下面的屏幕截图:
我的xml文件:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/white">
<TextView
android:id="@+id/tv_other_methods"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/ripple"
android:gravity="center_horizontal"
android:padding="@dimen/dp_12"
android:text="@string/from_other_methods"
android:textColor="@color/blue"
android:textSize="@dimen/sp_17" />
<View
android:id="@+id/view_other_methods"
android:layout_width="match_parent"
android:layout_height="@dimen/dip_1"
android:background="@color/light_grey"
app:layout_constraintBottom_toBottomOf="@id/tv_other_methods" />
<TextView
android:id="@+id/tv_FromChinaUnionPay"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/ripple"
android:gravity="center_horizontal"
android:padding="@dimen/dp_12"
android:text="@string/from_china_union_pay"
android:textColor="@color/blue"
android:textSize="@dimen/sp_17"
app:layout_constraintBottom_toBottomOf="@id/view_other_methods"
app:layout_constraintTop_toTopOf="@id/view_FromChinaUnionPay" />
<View
android:id="@+id/view_FromChinaUnionPay"
android:layout_width="match_parent"
android:layout_height="@dimen/dip_1"
android:background="@color/light_grey"
app:layout_constraintBottom_toBottomOf="@id/tv_FromChinaUnionPay" />
<TextView
android:id="@+id/tv_Cancel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/ripple"
android:gravity="center_horizontal"
android:padding="@dimen/dp_12"
android:text="@string/cancel"
android:textColor="@color/blue"
android:textSize="@dimen/sp_17"
app:layout_constraintTop_toBottomOf="@+id/view_FromChinaUnionPay" />
</android.support.constraint.ConstraintLayout>
我的BottomSheetDialog的java代码:
final BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(mContext);
bottomSheetDialog.setContentView(R.layout.dialog_web_view_options);
// dialog.setCancelable(false);
final Window window = bottomSheetDialog.getWindow();
assert window != null;
window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
window.setLayout(ActionBar.LayoutParams.MATCH_PARENT, ActionBar.LayoutParams.WRAP_CONTENT);
window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
window.getDecorView().setPadding(20, 0, 20, 0);
bottomSheetDialog.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface dialog) {
FrameLayout bottomSheet = bottomSheetDialog.findViewById(android.support.design.R.id.design_bottom_sheet);
BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);
behavior.setSkipCollapsed(true);
behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
}
});
在我的布局中,如果我用 LinearLayout 替换 ConstraintLayout ,那么它可以正常工作并占据全高。如果我做错了,请告诉我。使用 LinearLayout 时的屏幕截图:
我尝试过这些解决方案,但没有任何效果:
任何帮助将不胜感激。谢谢!
答案 0 :(得分:0)
您尚未限制所有观看次数 - 第一个TextView
没有任何限制。您添加的约束未正确指定,无法按垂直顺序正确显示视图。我建议创建所有视图的垂直链,并将父ConstraintLayout's
layout_height
设置为wrap_content
。 XML应如下所示:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white">
<TextView
android:id="@+id/tv_other_methods"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="@drawable/ripple"
android:gravity="center_horizontal"
android:padding="@dimen/dp_12"
android:text="@string/from_other_methods"
android:textColor="@color/blue"
android:textSize="@dimen/sp_17"
app:layout_constraintBottom_toTopmOf="@id/view_other_methods"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<View
android:id="@+id/view_other_methods"
android:layout_width="0dp"
android:layout_height="@dimen/dip_1"
android:background="@color/light_grey"
app:layout_constraintBottom_toTopOf="@id/tv_FromChinaUnionPay"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tv_other_methods" />
<TextView
android:id="@+id/tv_FromChinaUnionPay"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="@drawable/ripple"
android:gravity="center_horizontal"
android:padding="@dimen/dp_12"
android:text="@string/from_china_union_pay"
android:textColor="@color/blue"
android:textSize="@dimen/sp_17"
app:layout_constraintBottom_toTopOf="@id/view_FromChinaUnionPay"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/view_other_methods" />
<View
android:id="@+id/view_FromChinaUnionPay"
android:layout_width="0dp"
android:layout_height="@dimen/dip_1"
android:background="@color/light_grey"
app:layout_constraintBottom_toTopOf="@id/tv_Cancel"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tv_FromChinaUnionPay" />
<TextView
android:id="@+id/tv_Cancel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="@drawable/ripple"
android:gravity="center_horizontal"
android:padding="@dimen/dp_12"
android:text="@string/cancel"
android:textColor="@color/blue"
android:textSize="@dimen/sp_17"
app:layout_constraintTop_toBottomOf="@+id/view_FromChinaUnionPay"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
</android.support.constraint.ConstraintLayout>
作为旁注,建议不要对match_parent
内的任何观点使用ConstraintLayout
,因为文档建议:
重要提示:不建议对ConstraintLayout中包含的小部件使用MATCH_PARENT。可以使用MATCH_CONSTRAINT定义类似的行为,并将相应的左/右或上/下约束设置为&#34; parent&#34;。