Develop Reference

Android webview not filling device screen height

I am using a webview to load html data.
I want to place two buttons on the bottom for some functionality.
I have put teh webview and the bottom layout in a frame layout.
Web view shows html data only when i give it some specific height e.g 500dp.
Also the bottom layout also scrolls along with webview.
Please help how i can do this.
<?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="10dp" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/newsHeading"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Heading"
android:textColor="#000000"
android:textSize="18sp" />
<WebView
android:id="#+id/webviewNews"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="30dp" />
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#color/black"
android:padding="10dp" >
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/back1"
android:padding="20dp" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="#drawable/share11"
android:padding="20dp" />
</RelativeLayout>
</FrameLayout>
</LinearLayout>

I had the same problem and I have fixed it by changing the LinearLayout by a RelativeLayout and setting all the "parent aligments" to the WebView, but this fill the screen.
For your layout, try align your button's LinearLayout to the parent's bottom, and replace the alignParentBottom of the WebView by a layout_above anchored to it. I have tested it and works fine.
Here is the code, try it:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:id="#+id/webview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_above="#+id/linlyt_buttons"/>
<LinearLayout
android:id="#+id/linlyt_buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_alignParentBottom="true">
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button1"/>
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button2"/>
</LinearLayout>
<RelativeLayout
android:id="#+id/rellyt_imagebuttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:background="#color/black"
android:padding="10dp">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#android:drawable/ic_menu_close_clear_cancel"
android:padding="20dp"
android:contentDescription="Back/Cancel"/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="#android:drawable/ic_menu_share"
android:padding="20dp"
android:contentDescription="Share"/>
</RelativeLayout>
</RelativeLayout>

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="match_parent"
android:orientation="vertical">
<WebView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp">
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button1"/>
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button2"/>
</LinearLayout>
</LinearLayout>

position:fixed equivalent in android?

I want to keep an ImageView's position fixed in a native android app, that is, it shouldn't move when a user scrolls.
In other words, I want the same effect what happens with css position:fixed in a web page.
The layout code is like:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.ProductDetailActivity">
<ImageView
android:id="#+id/product_image"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".5"/>
<TableLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".5"
android:layout_margin="#dimen/activity_horizontal_margin">
<TableRow>
<TextView
android:id="#+id/product_model_label"
android:layout_width="match_parent"
android:layout_height="32dp"
android:text="#string/product_model_label"
style="#style/ProductDetail"/>
<TextView
android:id="#+id/product_model"
android:layout_width="match_parent"
android:layout_height="32dp"/>
</TableRow>
</TableLayout>
I want the TableLayout to scroll over the image.
NOTE: My actual layout file has more table rows.

add image view outside the scroll view . look at this example
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.sensor.MainActivity"
tools:ignore="MergeRootFrame" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher"
android:layout_gravity="center"/>
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test"
android:padding="100dp"
android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test 1"
android:padding="50dp"
android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test 2"
android:padding="50dp"
android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
</ScrollView>
</LinearLayout>
</FrameLayout>

use relative layout. .
<ImageView
android:id="#+id/product_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"/>
you can add other parameters like alignParentLeft, center_Horizontal etc.

Android linear layout difficulties

I have a portrait xml layout file which contains a text-box which rests onto of an ImageView. This was done using a vertical linear layout. The trouble is, I have created a landscape xml layout file, but I don't know how to insert a text box above the ImageView in this particular layout file. For some reason i'm having trouble.
To summarize, I want to replicate the style I had in my portrait xml (with regards to the text-box and ImageView relationship). Pictures below should clarify exactly what I mean. Icons are covered in gray on purpose, but you get the general idea.
My Landscape xml:
<?xml version="1.0" encoding="utf-8"?>
<!-- This relative layout will center EVERYTHING within it. Do not touch this functionality. -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/relative_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ProgressBar
android:id="#+id/progressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<com.edmodo.cropper.CropImageView
xmlns:custom="http://schemas.android.com/apk/res-auto"
android:id="#+id/CropImageView"
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="1"
android:gravity="center" >
</com.edmodo.cropper.CropImageView>
<LinearLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight=".12"
android:gravity="center" >
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:ignore="UselessParent" >
<ImageView
android:id="#+id/button1of3"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:contentDescription="#string/button1_description"
android:src="#drawable/ic_action_rotate"
android:visibility="invisible"
tools:ignore="Suspicious0dp" />
<ImageView
android:id="#+id/button2of3"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:contentDescription="#string/button3_description"
android:padding="2dp"
android:src="#drawable/ic_action_camera" />
<ImageView
android:id="#+id/button3of3"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:contentDescription="#string/button4_description"
android:src="#drawable/ic_action_feed" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</RelativeLayout>

Just wrap your CropImageView inside a layout, for example, a LinearLayout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/relative_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ProgressBar
android:id="#+id/progressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:id="#+id/test"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight=".12"
android:text="Test" />
<com.edmodo.cropper.CropImageView
xmlns:custom="http://schemas.android.com/apk/res-auto"
android:id="#+id/CropImageView"
android:layout_height="0dip"
android:layout_width="fill_parent"
android:layout_weight=".88"
android:gravity="center" >
</com.edmodo.cropper.CropImageView>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight=".12"
android:gravity="center" >
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:ignore="UselessParent" >
<ImageView
android:id="#+id/button1of3"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:contentDescription="#string/button1_description"
android:src="#drawable/ic_action_rotate"
android:visibility="invisible"
tools:ignore="Suspicious0dp" />
<ImageView
android:id="#+id/button2of3"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:contentDescription="#string/button3_description"
android:padding="2dp"
android:src="#drawable/ic_action_camera" />
<ImageView
android:id="#+id/button3of3"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:contentDescription="#string/button4_description"
android:src="#drawable/ic_action_feed" />
</LinearLayout>
</LinearLayout>
</LinearLayout>

ListView rows disappear when adding a RelativeLayout below a ListView

Here's a simplified version of the portrait UI I want from my layout:
It's a ListView above another layout.
The complication is that I want the whole bottom layout (in this case 'Button2') to be visible when lots of lines get added to the EditText:
I've been trying to achieve this by nesting a RelativeLayout inside a LinearLayout. Unfortunately, the ListView disappears when I get the effect I want with the EditText, e.g.
I've tried loads of alternatives, but nothing seems to achieve both goals.
Here's my XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="#+id/AAA"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</FrameLayout>
<LinearLayout
android:id="#+id/BBB"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/AAA"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/list_container"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1" >
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:entries="#array/list_items"/>
</LinearLayout>
<RelativeLayout
android:id="#+id/input_parent"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="#+id/button1"
android:layout_above="#+id/bottom_layout"
android:layout_width="100dip"
android:layout_height="50dip"
android:clickable="true"
android:text="Button1" />
<EditText
android:id="#+id/edittext"
android:layout_above="#+id/bottom_layout"
android:layout_toRightOf="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="50dip"
android:imeOptions="flagNoExtractUi"
android:inputType="textMultiLine"
android:maxLines="8"
android:scrollbars="vertical" />
<!-- Align this with the bottom so when the input text area gets
really big it doesn't push this section off screen -->
<LinearLayout
android:id="#+id/bottom_layout"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="150dip"
android:layout_gravity="bottom"
android:clickable="true"
android:text="Button2" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
If I remove the android:layout_alignParentBottom="true" from the bottom_layout then the ListView contents appears, but then I lose the effect I want with the EditText.
Can anybody help? I need to support OS 2.2+.

Simplifying the layout a bit like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="#+id/AAA"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</FrameLayout>
<RelativeLayout
android:id="#+id/BBB"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/AAA"
android:orientation="vertical" >
<ListView
android:id="#+id/list"
android:layout_above="#+id/edittext"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:entries="#array/list_items"/>
<Button
android:id="#+id/button1"
android:layout_above="#+id/bottom_layout"
android:layout_width="100dip"
android:layout_height="50dip"
android:clickable="true"
android:text="Button1" />
<EditText
android:id="#+id/edittext"
android:layout_above="#+id/bottom_layout"
android:layout_toRightOf="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="50dip"
android:imeOptions="flagNoExtractUi"
android:inputType="textMultiLine"
android:maxLines="8"
android:scrollbars="vertical" />
<!-- Align this with the bottom so when the input text area gets
really big it doesn't push this section off screen -->
<LinearLayout
android:id="#+id/bottom_layout"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="150dip"
android:layout_gravity="bottom"
android:clickable="true"
android:text="Button2" />
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
seems to give the result you were describing.

How to center a view using RelativeLayout?

I wanted to know how to center a View between two other views (or between a view and the parent edge) using RelativeLayout.
For example, if I have the following...
How do I vertically center the Button between the ImageView and the bottom of the screen using RelativeLayout?
I'm looking for a solution where...
the Button is not stretched in any way
there are no nested layouts
And I'm trying to do this in the XML layout (not programmatically).

You can use following:
<RelativeLayout
android:layout_below="#id/theImageView"
android:align_parentBottom="true"
android:layout_width="match_parent"
android:layout_height="200dp" >
<Button
android:id="#+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:onClick="onClickButton"
android:textSize="20sp"
android:text="Go"/>
</RelativeLayout>

There's unfortunately no easy way to do this. You can either nest layouts, or do it at runtime. The simplest way is to nest layouts:
<LinearLayout
android:width="match_parent"
android:height="match_parent"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/my_top_image"/>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="#string/my_button_label"/>
</RelativeLayout>
</LinearLayout>
This puts the image at the top. Below that, the layout_height=0 and layout_weight=1 attributes on the RelativeLayout cause it to take up all the remaining space. You can then center the button in the RelativeLayout. You can play with padding on the button to get it to the size you want.

Use below XMl code for that, it will solve your problem.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="#+id/mLlayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/mImgView1"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="#drawable/ic_launcher" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_weight="2" >
<Button
android:id="#+id/Btn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Dipak" />
</RelativeLayout>
</LinearLayout>
</RelativeLayout>

use this android:layout_centerInParent="true" in XML file..
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="1.0" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="0.8"
android:background="#00ff00" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="0.2" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Button" />
</RelativeLayout>
</LinearLayout>

#Gus you can create center view between two other view... this is not exact you must try with
this way....
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="120dp"
android:layout_height="120dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="#00ccFF"
android:orientation="horizontal" >
</LinearLayout>
<LinearLayout
android:layout_width="59dp"
android:layout_height="59dp"
android:layout_alignRight="#+id/linearLayout1"
android:layout_alignTop="#+id/linearLayout1"
android:layout_marginRight="-21dp"
android:layout_marginTop="-21dp"
android:background="#FFccFF"
android:orientation="vertical" >
</LinearLayout>
</RelativeLayout>

I think what you just need is to allign the imageview as you would normally done and align the button using layout_below , no need for hardcoding nor using nested views use android:gravity="center" on the button you're done
<RelativeLayout
android:layout_below="#id/theImageView"
android:align_parentBottom="true"
android:layout_width="match_parent"
android:layout_height="200dp" >
<ImageView
android:id="#+id/imgview"
android:layout_width="match_parentmat"
android:layout_height="wrap_content" />
<Button
android:id="#+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/imgview"
android:gravity="center"
android:onClick="onClickButton"
android:textSize="20sp"
android:text="Go"/>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:src="#drawable/wood" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/imageView1"
android:layout_below="#+id/imageView1"
android:layout_marginLeft="101dp"
android:layout_marginTop="53dp"
android:text="Image Button" />
</RelativeLayout>