如何在android

Question

我想为framelayout设置高度和宽度，如果使用setlayoutparams给java代码中的值显示非常小的框，但在XML中它显示正确。

这是我的java代码

 FrameLayout frameLayout2= (FrameLayout) light.findViewById(R.id.frameLayout2);
 ConstraintLayout.LayoutParams lp = new ConstraintLayout.LayoutParams(300, 300);
 frameLayout2.setLayoutParams(lp);

这是我的xml： 注意：约束布局是我的父

<android.support.constraint.ConstraintLayout
    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=".LightPlaceFragment"
    tools:layout_editor_absoluteY="81dp"
    tools:layout_editor_absoluteX="0dp"
    android:background="@color/colorAccent">



    <FrameLayout
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="8dp"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintHorizontal_bias="0.882"
        android:layout_marginTop="8dp"
        app:layout_constraintTop_toBottomOf="@+id/l_width"
        app:layout_constraintVertical_bias="0.162"
        android:id="@+id/frameLayout2">


        <include
            android:id="@+id/other"
            android:layout_width="300dp"
            android:layout_height="200dp"
            android:visibility="visible"
            layout="@layout/sample1" />

    </FrameLayout>



</android.support.constraint.ConstraintLayout>

在xml中给出的值，以便正确显示： Result using XML

给定java代码中的值，因此它显示的非常小 Result using Java

如何以编程方式更改framelayout宽度和高度？

请帮帮我。

Answer 1

试试这个

FrameLayout frameLayout2= (FrameLayout) light.findViewById(R.id.frameLayout2);
ConstraintLayout.LayoutParams oldParams = (ConstraintLayout.LayoutParams) frameLayout2.getLayoutParams();
oldParams.width=400;
oldParams.height=500;
frameLayout2.setLayoutParams(oldParams);

或者这个

FrameLayout frameLayout2= (FrameLayout) light.findViewById(R.id.frameLayout2);
ConstraintLayout.LayoutParams oldParams= new ConstraintLayout.LayoutParams(300,300);
frameLayout2.setLayoutParams(oldParams);

Answer 2

使用此

 FrameLayout frameLayout2= (FrameLayout) light.findViewById(R.id.frameLayout2);
 LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(300, 300);
 frameLayout2.setLayoutParams(lp);