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Linear layout below the ListView, Some portions not visible?

I have a problem with LinearLayout which is below the listview. I tried to give the listview weight and layout above, set the layout_height to 0dp but nothing wotked.
Here is my XML code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="100"
android:background="#00c4ff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Application № - "
android:layout_weight="50"/>
<TextView
android:id="#+id/number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="__"
android:layout_weight="20" />
<EditText
android:id="#+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="date"
android:hint="dd/mm/yyyy"
android:layout_weight="30"
/>
</LinearLayout>
<ListView
android:id="#+id/lvMain"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="bottom"
android:id="#+id/ll">
<Button
android:id="#+id/plus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/comment"
android:inputType="text"
android:hint="Comment" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:gravity="bottom">
<Button
android:id="#+id/send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send" />
<Button
android:id="#+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save and close"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
when ListView fills the screen, I cannot see the buttons below to it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="100">
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="100"
android:background="#00c4ff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Application № - "
android:layout_weight="50"/>
<TextView
android:id="#+id/number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="__"
android:layout_weight="20" />
<EditText
android:id="#+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="date"
android:hint="dd/mm/yyyy"
android:layout_weight="30" />
</LinearLayout>
<ListView
android:id="#+id/lvMain"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="90">
</ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="10"
android:orientation="vertical"
android:gravity="bottom"
android:id="#+id/ll">
<Button
android:id="#+id/plus"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/comment"
android:inputType="text"
android:hint="Comment" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:gravity="bottom">
<Button
android:id="#+id/send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send" />
<Button
android:id="#+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save and close"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>

Your layout edited by adding layout weights. Please check.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1">
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.1"
android:weightSum="100"
android:background="#00c4ff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Application № - "
android:layout_weight="50"/>
<TextView
android:id="#+id/number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="__"
android:layout_weight="20" />
<EditText
android:id="#+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="date"
android:hint="dd/mm/yyyy"
android:layout_weight="30"
/>
</LinearLayout>
<ListView
android:id="#+id/lvMain"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.6">
</ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:layout_weight="0.3"
android:gravity="bottom"
android:id="#+id/ll">
<Button
android:id="#+id/plus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/comment"
android:inputType="text"
android:hint="Comment" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:gravity="bottom">
<Button
android:id="#+id/send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send" />
<Button
android:id="#+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save and close"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>

You should try List View with Layout having weight.
Sample Code:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.3"
/>
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.4"
>
<ListView
android:id="#+id/lvMain"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.3"
/>
</LinearLayout>
In this your height is fixed for listview. Assuming that you can use list view as srollable in particular height.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/topLayout"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:alignParentTop="true"
android:weightSum="100"
android:background="#00c4ff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Application № - "
android:layout_weight="50"/>
<TextView
android:id="#+id/number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="__"
android:layout_weight="20" />
<EditText
android:id="#+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="date"
android:hint="dd/mm/yyyy"
android:layout_weight="30"
/>
</LinearLayout>
<LinearLayout
android:id="#+id/bottomLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="bottom"
android:alignParentBottom="true"
android:id="#+id/ll">
<Button
android:id="#+id/plus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/comment"
android:inputType="text"
android:hint="Comment" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:gravity="bottom">
<Button
android:id="#+id/send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send" />
<Button
android:id="#+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save and close"/>
</LinearLayout>
</LinearLayout>
<ListView
android:id="#+id/lvMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/topLayout"
android:layout_above="#+id/bottomLayout">
</ListView>
</RelativeLayout>
Have edited your code. Try this.
Here in this I have used RelativeLayout, so that we use android:alignParentBottom="true" for bottom layout which makes the layout in fix in bottom. Simillarly we can do for top layout using android:alignParentBottom="true". Now coming to ListView, which we need to place between top and bottom layout I have used the following code to achieve it
android:layout_below="#+id/topLayout"
android:layout_above="#+id/bottomLayout"
This makes the ListView to stick in between the top and bottom layout.
Hope this is helpful:)

Change as below
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00c4ff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Application № - "
android:layout_weight="50"/>
<TextView
android:id="#+id/number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="__"
android:layout_weight="20" />
<EditText
android:id="#+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="date"
android:hint="dd/mm/yyyy"
android:layout_weight="30"
/>
</LinearLayout>
<ListView
android:id="#+id/lvMain"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
</ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="bottom"
android:id="#+id/ll">
<Button
android:id="#+id/plus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add"/>
<EditText
android:layout_width="match_parent"
android:layout_height="50dp"
android:id="#+id/comment"
android:inputType="text"
android:hint="Comment" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="bottom">
<Button
android:id="#+id/send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send" />
<Button
android:id="#+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save and close"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>

Divide Screen into Four Equal Parts using Relative Layout

I currently have code that allows me to divide the screen into four equal parts, with an image button in each part. However, the code uses linear layouts which brings up the suggestion "nested weights are bad for performance". How can I make my layout using relative layouts?
Below is the code, and here is a picture of the intended format
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1.0"
android:orientation="horizontal"
android:background="#ff191919">
<ToggleButton
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff414141"
android:layout_weight="1.0"
android:text="Plane"
android:layout_margin="5dp"
android:textSize="20sp"
android:onClick="airplaneClicked"/>
<ImageButton
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff414141"
android:layout_weight="1.0"
android:layout_margin="5dp"
android:scaleType="fitCenter"
android:src="#drawable/ic_brightness"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1.0"
android:orientation="horizontal"
android:background="#ff191919">01
<ImageButton
android:id="#+id/button3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff414141"
android:layout_weight="1.0"
android:layout_margin="5dp"
android:scaleType="fitCenter"
android:src="#drawable/ic_sound" />
<ImageButton
android:id="#+id/settingsbutton"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff414141"
android:layout_weight="1.0"
android:layout_margin="5dp"
android:scaleType="fitCenter"
android:src="#drawable/settings2"/>
</LinearLayout>
</LinearLayout>

Using below xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#242425"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textColor="#d5d5d5" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#d5d5d5"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#d5d5d5"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#242425"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textColor="#d5d5d5" />
</LinearLayout>
</LinearLayout>

Try this code for your RelativeLayout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/r1"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:id="#+id/r3"
android:layout_width="match_parent"
android:layout_height="225dp"
android:layout_marginBottom="10dp"
android:layout_alignParentTop="true" >
<ImageButton
android:id="#+id/i1"
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#drawable/ic_launcher" />
<ImageButton
android:id="#+id/i2"
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#drawable/ic_launcher" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/r2"
android:layout_width="match_parent"
android:layout_height="225dp"
android:layout_alignParentBottom="true"
android:layout_below="#+id/r3" >
<ImageButton
android:id="#+id/i3"
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#drawable/ic_launcher" />
<ImageButton
android:id="#+id/i4"
android:layout_width="150dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#drawable/ic_launcher" />
</RelativeLayout>
</RelativeLayout>

Try this
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1.0">
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
android:layout_weight="1"
android:text="Button" />
<Button
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_green_light"
android:layout_weight="1"
android:text="Button" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1.0"
android:orientation="horizontal" >
<Button
android:id="#+id/button3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_blue_light"
android:layout_weight="1"
android:text="Button" />
<Button
android:id="#+id/button4"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_red_light"
android:layout_weight="1"
android:text="Button" />
</LinearLayout>

how to align button at the bottom of the screen in LinearLayout

I am using linearlayout as parent and inside it I have two child linearlayouts. I want to align the buttons in the last linearlayout to the bottom of the screen.The bottom margin of the buttons should match the main linearlayouts bottom margin
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/parentlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="horizontal" >
<Button
android:id="#+id/save"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Save" />
<Button
android:id="#+id/submit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Submit" />
<Button
android:id="#+id/cancel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Cancel" />
<Button
android:id="#+id/delete"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Delete" />
<Button
android:id="#+id/reset"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Reset" />
</LinearLayout>
</LinearLayout>

Just reduce the textsize of the button Text. Since it is not able to display text in one line the margin is getting distorted.
Here I have made textSize to 11dp for each buttontext and the view is perfect for NexusOne size display
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/parentlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="horizontal" >
<Button
android:id="#+id/save"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Save"
android:textSize="11dp" />
<Button
android:id="#+id/submit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Submit"
android:textSize="11dp" />
<Button
android:id="#+id/cancel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Cancel"
android:textSize="11dp" />
<Button
android:id="#+id/delete"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Delete"
android:textSize="11dp" />
<Button
android:id="#+id/reset"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Reset"
android:textSize="11dp" />
</LinearLayout>
</LinearLayout>

try this using your parent as RelativeLayout
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/parentlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:orientation="horizontal" >
<Button
android:id="#+id/save"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="Save" />
<Button
android:id="#+id/submit"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="Submit" />
<Button
android:id="#+id/cancel"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="Cancel" />
<Button
android:id="#+id/delete"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="Delete" />
<Button
android:id="#+id/reset"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="Reset" />
</LinearLayout>

Its better if you use RelativeLayout for this kind of requirements. Would work without hassle.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/parentlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:layout_alignParentBottom="true"
android:orientation="horizontal" >
<Button
android:id="#+id/save"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Save" />
<Button
android:id="#+id/submit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Submit" />
<Button
android:id="#+id/cancel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Cancel" />
<Button
android:id="#+id/delete"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Delete" />
<Button
android:id="#+id/reset"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Reset" />
</LinearLayout>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/parentlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
</LinearLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="bottom"
android:orientation="horizontal" >
<Button
android:id="#+id/save"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Save"
android:textSize="12sp" />
<Button
android:id="#+id/submit"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Submit"
android:textSize="12sp" />
<Button
android:id="#+id/cancel"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Cancel"
android:textSize="12sp" />
<Button
android:id="#+id/delete"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Delete"
android:textSize="12sp" />
<Button
android:id="#+id/reset"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Reset"
android:textSize="12sp" />
</LinearLayout>
</LinearLayout>
</FrameLayout>
</FrameLayout>

button not displaying right side of the layout in android

Hi in this Layout i have two button's named as back and home same names i mentioned as id's for both.Now left side i want to display back button and right side corner i want to display home.But home button not displaying at the right corner.Now if i mention margin left it's not showing properly.Can any one please help me
xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="#FF0000"
android:orientation="horizontal">
<Button
android:id="#+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/back"
/>
<TextView
android:id="#+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:textStyle="bold"
/>
<Button
android:id="#+id/home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/home"
android:layout_marginLeft="60dp"
/>
</LinearLayout>
</LinearLayout>

Try this,
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="#FF0000"
android:orientation="horizontal"
android:weightSum="100" >
<Button
android:id="#+id/back"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_weight="20"
android:background="#drawable/back" />
<TextView
android:id="#+id/tv"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="60"
android:gravity="center"
android:text="Hello"
android:textStyle="bold" />
<Button
android:id="#+id/home"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginLeft="60dp"
android:layout_weight="20"
android:background="#drawable/home" />
</LinearLayout>
</LinearLayout>

Try below code xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="#FF0000"
android:orientation="horizontal">
<Button
android:id="#+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:background="#drawable/back"
/>
<TextView
android:id="#+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:textStyle="bold"
/>
<Button
android:id="#+id/home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/home"
android:layout_alignParentRight="true"
android:layout_marginLeft="60dp"
/>
</RelativeLayout>
</LinearLayout>

Try this way,hope this will help you to solve your problem.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="#FF0000"
android:orientation="horizontal"
android:gravity="center">
<Button
android:id="#+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/back"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center">
<TextView
android:id="#+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:textStyle="bold"/>
</LinearLayout>
<Button
android:id="#+id/home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/home"/>
</LinearLayout>

why don't you use relative layout for that, see that
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="#FF0000"
android:orientation="horizontal" >
<Button
android:id="#+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/account_settings" />
<TextView
android:id="#+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:textStyle="bold" />
<Button
android:id="#+id/home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#drawable/account_settings"
android:gravity="center_horizontal" />
</RelativeLayout>
</LinearLayout>
if you want to do this with linear layout use weight sum
<LinearLayout
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="#FF0000"
android:weightSum="3"
android:orientation="horizontal" >
<Button
android:id="#+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#drawable/account_settings" />
<TextView
android:id="#+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_weight="1"
android:textStyle="bold" />
<Button
android:id="#+id/home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:layout_weight="1"
android:background="#drawable/account_settings" />
</LinearLayout>
</LinearLayout>

How to generate Listview with button?

I want to implement a listView with three button below. My xml is given by the code below but the problem is the position of button. In the first time I used only linear but in some time the action of buttons are inversed. So I ought to use Relative layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="3dp" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="3dp" >
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginTop="5dp"
android:layout_weight="1" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_below="#+id/listView"
android:layout_margin="0dp"
android:orientation="horizontal"
android:padding="0dp" >
<Button
android:id="#+id/retour"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:layout_weight="1"
android:padding="0dp"
android:text="#string/cancel" />
<Button
android:id="#+id/Actualise"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:layout_weight="1"
android:gravity="center|center_vertical"
android:padding="0dp"
android:text="Actualiser la liste" />
<Button
android:id="#+id/testbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:layout_weight="1"
android:padding="0dp"
android:text="#string/selection" />
</RelativeLayout>
</RelativeLayout>
</LinearLayout>

Hope this helps
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="379dp" >
</ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight=".33"
android:layout_gravity="center"
android:text="Button" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight=".33"
android:layout_gravity="center"
android:text="Button" />
<Button
android:id="#+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight=".33"
android:layout_gravity="center"
android:text="Button" />
</LinearLayout>
</LinearLayout>

Try this code it works fine to show listview qith three button below listview
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/linearLayout1"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:id="#+id/linearLayout1"
android:weightSum="3"
>
<Button
android:id="#+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button" />
</LinearLayout>