android-layout-weight

I just implemented a ListView inside a LinearLayout, but I need to define the height of the LinearLayout (it has to be 50% of the screen height). <LinearLayout android:id="@+id/widget34" android:layout_width="300px" android:layout_height="235px" android:orientation="vertical" android:layout_below="@+id/tv_scanning_for" android:layout_centerHorizontal="true"> <ListView android:id="@+id/lv_events" android:textSize="18sp" android:cacheColorHint="#00000000" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@+id/tv_scanning_for" android:layout

I'm trying to divide a page in three parts. I'd like to do it in percentage values, however that is not supported by Android. Instead I have to use android:layout_weight . But I have a hard time understanding it and getting it right. Especially how the actual size gets calculated. Is there a way to get a percentage value (0..100%) out of android:layout_weight ? I went through a few cases (see attached screenshot) to describe the problems. The colored fields are all <LinearLayout> with android:layout_height="fill_parent" , because I want the full screen to be divided between those. Case 1 Okay,

I want to add three linear layouts to an activity programatically each of same width. the problem is i am not able to set the weights of these layouts programmatically. I could do this within xml, but I want to do this in program. here is what I want: Here its the solution LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(0, 100); lp.weight = 1; See Full Solution LinearLayout ll1, ll2, ll3; /* Find these LinearLayout by ID i.e ll1=(LinearLayout)findViewById(R.id.ll1); */ LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(0, 100); lp.weight = 1; ll1.setLayoutParams(lp); ll2

I have used this code to display 2 list view one on top of the other. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <ListView android:id="@+id/listView1" android:layout_width="match_parent" android:layout_height="fill_parent" android:layout_weight="1" android:background="#f00" > </ListView> <ListView android:id="@+id/listView2" android:layout_width="match_parent" android:layout_height="fill_parent" android:layout_weight="1" android:background="#0f0" > </ListView>

How can I set the value for the attribute layout_weight for button in android dynamically from java code ? Erich Douglass You can pass it in as part of the LinearLayout.LayoutParams constructor: LinearLayout.LayoutParams param = new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f ); YOUR_VIEW.setLayoutParams(param); The last parameter is the weight. Use LinearLayout.LayoutParams : LinearLayout.LayoutParams params = new LinearLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT); params.weight = 1.0f; Button button = new Button(this);