动态调整片段android
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dynamic resize fragment android
提问by bill23
I want to change the width of a fragment I'm using in my MaiActivity? But I can't find its LayoutParamsfor changing its default width:
我想更改我在 MaiActivity 中使用的片段的宽度？但我找不到它LayoutParams来更改其默认宽度：
public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
int widthFfragment = 300;
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
widthTot = size.x;
heightTot = size.y;
findViewById(R.id.f1).getLayoutParams().width = widthTot-widthFfragment;
}
}
This is my fragment's code:
这是我的片段代码：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/f1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#330000"
android:gravity="center_horizontal|center_vertical"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment 1"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
Fragment1.java
片段1.java
public class Fragment1 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//---Inflate the layout for this fragment---
return inflater.inflate( R.layout.fragment1, container, false);
}
}
Many thanks.
非常感谢。
回答by Miguel
You can do it by working with the LayoutParams instance of the View obtained from Fragment.getView(). My sample code:
您可以通过使用从 Fragment.getView() 获得的 View 的 LayoutParams 实例来实现。我的示例代码：
private void resizeFragment(Fragment f, int newWidth, int newHeight) {
if (f != null) {
View view = f.getView();
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(newWidth, newHeight);
view.setLayoutParams(p);
view.requestLayout();
}
}
And may be used as follows:
并且可以如下使用：
resizeFragment(myFragment, 200, 500);
resizeFragment(otherFragment, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
回答by Ian Warwick
Your right, the Fragment does not have LayoutParams because it is a conceptual container, you either need to adjust the layout params of the inflated view in the fragment, or to the container you attach the fragment to.
您的权利， Fragment 没有 LayoutParams 因为它是一个概念容器，您要么需要调整片段中膨胀视图的布局参数，要么调整片段附加到的容器。
public class Fragment1 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
ViewGroup view = (ViewGroup) inflater.inflate( R.layout.fragment1, container, false);
// TODO Adjust layout params of inflated view here
return view;
}
The example assumes you are inflating a ViewGroup.
该示例假设您正在膨胀一个 ViewGroup。
Hope that helps.
希望有帮助。
