Why inflate Other View over but can not fill the parent layout?

android layout

Want to design a FrameLayout, which has a WebView, the top WebView folded a transparent LinearLayout (id is middleLayout), while in the case of no network will LinearLayout becomes opaque, blocking the WebView, the user is prompted not networking.

Layout as follows:

 
 
android: layout_width = "fill_parent" 
android: layout_height = "fill_parent" 
android: orientation = "vertical"> 

android: id = "@ + id / detailWebView" 
android: layout_width = "fill_parent" 
android: layout_height = "fill_parent" 
android: layout_marginTop = "48dip" /> 

android: id = "@ + id / middleLayout" 
android: layout_width = "fill_parent" 
android: layout_height = "fill_parent" 
android: layout_marginTop = "48dip" 
android: background = "# 00000000" 
android: orientation = "vertical" /> 

android: layout_width = "fill_parent" 
android: layout_height = "48dip" 
android: layout_gravity = "top" 
android: background = "@ drawable / title_bg" 
android: orientation = "horizontal"> 

android: id = "@ + id / back" 
android: layout_width = "48dip" 
android: layout_height = "fill_parent" 
android: background = "# 00000000" 
android: scaleType = "fitCenter" 
android: src = "@ drawable / back" /> 
 

android: layout_width = "fill_parent" 
android: layout_height = "fill_parent" 
android: background = "# 00000000" 
android: orientation = "vertical" /> 

 

Triggered when there is no network callQuestion background function:

 
private void callQuestion (String result) {
if (result == "No result") {
LinearLayout middleLayout = (LinearLayout) findViewById (R.id.middleLayout); 
middleLayout.setBackgroundColor (Color.WHITE); 

View view = LayoutInflater.from (this). Inflate (
R.layout.detail_no_result, null); 
middleLayout.addView (view); 
} 
} 

Among R.layout.detail_no_result follows:

 
 
android: id = "@ + id/txt1" 
android: layout_width = "fill_parent" 
android: layout_height = "fill_parent" 
android: background = "# ff0" 
android: gravity = "center" 
android: text = "Network problem, I refresh ..." 
android: textSize = "30sp" /> 

Why not fill the TextView (fill_parent) throughout middleLayout? ? ?

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Reply:

 LinearLayout.LayoutParams ly = new LayoutParams (LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT); 
middleLayout.addView (view, ly);