如何从Horizo​​ntalScrollView中获取屏幕宽度

Question

I want to create a view which contains several elements and which can get wider than the screen. Therefore I put it in a HorizontalScrollView :

<HorizontalScrollView
        android:layout_width="fill_parent"
        android:layout_height="400dp"
        android:id="@+id/horizontalScrollView" >

<view class="com.hb.examples.myapplication2.app.ui.controls.LineGraphView"
      android:layout_width="wrap_content"
      android:layout_height="fill_parent"
      android:id="@+id/line_chart"/>

</HorizontalScrollView>

The containing View can get wider, but don't have to. When its smaller than the screen I want to be it as wide as possible without displaying the Scrollbar. So how do I get the Screenwidth to return in to Android via setMeasuredDimension in onMeasure ?

Answer 1

Since you're in a view, you can retrieve display metrics from the context the view is associated with

WindowManager wm = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics metrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(metrics);
setMeasuredDimension(metrics.widthPixels, MeasureSpec.getSize(heightMeasureSpec));