我有一个垂直的LinearLayout LL_p,其中有两个子级为LinearLayouts LL_1和LL_2,而这些子级又有自己的子级。根据LL_1和LL_2的可见内容,我想动态更改LL_p中的相对权重。我已经有了一个xml布局,里面有很多我不想丢失的细节,所以我只需要对权重进行增量更改。我怎么做?这是我的xml
…
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=“0.2”
android:orientation="vertical" >
<LinearLayout
android:id="@+id/ll_1”
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.55"
android:background="@drawable/some_image”
android:orientation="vertical" >
<!—- a number of includes —>
</LinearLayout>
<LinearLayout
android:id="@+id/ll_2”
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.45"
android:layout_marginBottom="@dimen/dim_1”
android:background="@color/some_color”
android:orientation="horizontal" >
<!—- a number of children —>
</LinearLayout>
</LinearLayout>
</LinearLayout>
所以在java活动类中,我想我需要以下方法,但我需要帮助来完成它。请注意,我没有实例化新的布局参数,因为这会导致我丢失我的xml布局细节;相反,我使用getLayoutParams
从xml中获取一组。那么如何对所获得的布局进行重量调整?
private void adjustMYLayout(boolean flip) {
LayoutParams layout1 = mLL1.getLayoutParams();
LayoutParams layout2 = mBLL2.getLayoutParams();
//now what?
if(flip) {//set one weight system
}else {
//set other weight system
}
}
@nKn更新
private void adjustMYLayout(boolean flip) {
if (flip) {
mLL1.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 0.8f));
mLL2.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 0.2f));
} else {
mLL1.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 0.55f));
mLL2.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT, 0.45f));
}
}
答案 0 :(得分:4)
您可以通过声明LinearLayout.LayoutParams
对象
tv.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1f));
第三个参数(1f
)是布局的权重(在这种情况下为1(f
代表float
))。