[英]how to change view constraint top margin programmatically in Android?
我正在使用約束布局,我有這樣的視圖
<View
android:id="@+id/view_separator_line"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginTop="32dp"
android:background="@color/grey_dark_low"
app:layout_constraintEnd_toEndOf="@+id/imageView_gear_setting_user_information"
app:layout_constraintStart_toStartOf="@+id/imageView_following_profile_picture"
app:layout_constraintTop_toBottomOf="@+id/imageView_following_profile_picture" />
從上面的 xml 可以看出,這個視圖的頂部被限制在另一個視圖的底部,並且布局邊距頂部是 32dp,我想以編程方式將其更改為 24dp,該怎么做?
試試下面的代碼
ConstraintLayout.LayoutParams newLayoutParams = (ConstraintLayout.LayoutParams) toolbar.getLayoutParams();
newLayoutParams.topMargin = 0;
newLayoutParams.leftMargin = 0;
newLayoutParams.rightMargin = 0;
toolbar.setLayoutParams(newLayoutParams););
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