[英]Android: get parent layout width in custom view to set child width
[英]Set child layout width programmatically In ANDROID?
在我的代码中,我有一个具有多个子布局的XML文件。 Aand我只想根据设备的屏幕宽度以编程方式设置其中一个子布局的宽度。 到目前为止,我曾尝试过Layout params,setparam和其他方法,但它在获取布局ID时显示空指针异常。
我的父布局是相对布局,第一个子布局是线性布局(“对于此布局我需要更改宽度”)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/parentlayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:id="@+id/childlayout"
android:layout_width="250dip"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#153746">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="@drawable/sub_title"
android:gravity="center_vertical" >
<TextView
android:id="@+id/menu_header_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="asd"
android:textColor="#ffffff"
android:layout_marginLeft="10dip" />
<ImageView
android:id="@+id/menu_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal" />
</LinearLayout>
<ListView
android:id="@+id/menu_listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="@android:color/darker_gray"
android:dividerHeight="1dip"
android:scrollingCache="false" />
</LinearLayout>
<FrameLayout
android:id="@+id/overlay"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</FrameLayout>
</LinearLayout>
Java代码: -
public class SlideMenu extends LinearLayout {
// keys for saving/restoring instance state
public final static String KEY_MENUSHOWN = "menuWasShown";
private final static String KEY_STATUSBARHEIGHT = "statusBarHeight";
private final static String KEY_SUPERSTATE = "superState";
// Display display = ((WindowManager) getWindowToken()).getDefaultDisplay();
// int width = display.getWidth(); // deprecated
// int height = display.getHeight(); // deprecated
// float layWidth = (width*70)/100;
//
//// LinearLayout view= (LinearLayout)findViewById(R.id.childlayout);
//// LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) view.getLayoutParams();
//// params.width = 130;
//// view.setLayoutParams(params);
// view.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, theSizeIWant));
public static class SlideMenuItem {
public int id;
public Drawable icon;
public String label;
}
这是我的代码片段,我评论我到目前为止尝试的部分,并得到任何好结果..``
你能做到这一点:将id设置为这个子线性布局,然后:
LinearLayout linLayout = (LinearLayout) findViewById(R.id.yourID);
LinearLayout .LayoutParams layoutParams= new
LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.MATCH_PARENT);//or whatever , you can set the width and height programmatically and then setLayoutParams()
编辑:
我看到你已经试过了,对不起。 但是有两种线性布局没有?
把它放在java代码中:
int width = 300;
int height = LayoutParams.WRAP_CONTENT;
LinearLayout childLayout = (LinearLayout) findViewById(R.id.childLayout);
childLayout.setLayoutParams(new LayoutParams(width, height));
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