Develop Reference

How to make a layout in android that sticks to the bottom of the screen until the scrollview is scrolled to a certain position it gets scroll too?

I want to make a android activity screen where a layout is sticked to bottom until scrollview get scroll to a certain position. like in this video samples links:
https://drive.google.com/open?id=0B14wNBitoI33LWtUNThqcXRIUWc
https://drive.google.com/open?id=0B14wNBitoI33QW1BOGR1di1TcGc

amarjain07's StickyScrollView maybe a solution you would want to look into. His methodology of assigning the "sticky" views as identified attributes in the layout xml is quite a nifty feature IMHO.

Use a RelativeLayout and put the Button-Container inside it.
Pass the container in your_scrollview_activity.xml the following attribute
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button 1 (reft)" />
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Button 2 (right)"/>
</LinearLayout>
</RelativeLayout>
NOTE: You need to set a listener in your activity to get the ScrollViews current position / current height. With this current height you can calculate the "left space" to the bottom / end of the ScrollView. If your RelativeLayout reaches the bottom or if it's close to the bottom AND within the visible area, then call your animation.

Put a TextView in front of a ImageView

Im searching a way how to fix a TextView on a ,for example, transparent square like in the Picture I did in Paint.net .So the TextView should in front of the transparent square (ImageView).Also it should stretch when the screen is bigger.
http://www7.pic-upload.de/22.02.14/24vtze5ulxc2.png
How can I solve the problem ?
Thanks !

Use a FrameLayout
<FrameLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/semi_transparent_background"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="This is my text."/>
</FrameLayout>
Alternatively, you could do something similar with a relative layout.

You can use RelativeLayout or FrameLayout for that.
<FrameLayout>
<ImageView>
<TextView>
</FrameLayout>
Your textview will appear on ImageView.
Although note that, RelativeLayout has double taxation tradeoff. Each measure and layout happens twice.

Simply ordering the items in RelativeLayout from top to bottom in the XML will make each in turn move to the front compared to the others above it.

Force an EditText to scroll down to a certain spot

How would I make an multi-line EditText with a vertical scroll bar go down to a certain spot? I want to do this inside of the Java code, and I'd prefer to do it with an EditText, but I'd be willing to use a ScrollView if I need to.
The EditText XML:
<EditText
android:id="#+id/theTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:inputType="textAutoCorrect|textMultiLine"
android:scrollbars="vertical"
android:width="0dp" >

You can try using scrollTo api from the view.

android:gravity="right" not working on all devices for Arabic and other RTL languages

I've got an Arabic Android application, and here is the XML code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/greygradientbackground">
<ImageView android:id="#+id/logo"
android:layout_width="150dp"
android:layout_height="fill_parent"
android:scaleType="centerCrop"
android:layout_margin="5dp"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true" />
<TextView android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#000000"
android:layout_gravity="center_vertical|right"
android:gravity="right"
android:layout_toLeftOf="#id/logo"/>
</RelativeLayout>
The problem is that android:gravity works on some Android models and on others don't.
To be more specific, I've tested the app on many 2.3.3 android devices and the Arabic text is aligned right. However on other 2.3.3 devices the Arabic text is aligned left (which is wrong).
When I changed android:gravity="right" to android:gravity="left" the problem shifted from the second group of devices to the first.
So my question is how can I solve this issue especially that as far as I know there aren't a way to localize layouts based on a device model number.
Thanks in advance for any guidance because am totally lost. :(
UPDATE:
I searched about "How to align Arabic correctly on all Android versions?" but found nothing working on all my testing devices. Any suggestions please? I am sure there is a best practice approach for aligning Arabic text on Android.
UPDATE 2:
I tried to use a WebView instead of a TextView to align Arabic correctly using CSS styles. However, the Arabic text is showing in the WebView as strange characters.
Here is the Code:
mWebView.loadData("<html dir=\"rtl\">الأسم<body></body></html>", "text/html", "UTF-8");
The strange thing is that Arabic websites text is displayed correctly. So, what's the problem? :(

This is an expected behaviour. You may not use gravity="right", but gravity="end" instead, the same idea you apply to gravity="left" which you may use gravity="start", as well as layout_marginStart instead of layout_marginLeft
This way, Android will put the text to the "start" orientation, depending on the location. (for us, americans, we start to write from the left and we end on the right, but arabians start from the right and end on the left).
You can get the layout/text directions with the method getLayoutDirectionFromLocale(null), this will return View.LAYOUT_DIRECTION_LTR (left-to-right) or View.LAYOUT_DIRECTION_RTL (right-to-left, like arabic).
More info you can check here

change your textveiw in the layout to this....
<TextView android:id="#+id/title"
change your layout_width to "fill_parent"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#000000"
android:layout_gravity="center_vertical|right"
android:gravity="right"
android:layout_toLeftOf="#id/logo"
/>
You can change the thing in another way also....You can make changes in the activity class..as follows...let your TextView with id title is mapped in the activity class with a TextView object named "tv" the you can make it right aligned by writing this.
tv.setGravity(Gravity.RIGHT);
but in both the cases the width layout width should be "fill_parent"..
If you do not do this and keep it "wrap_content" then there is no space for the text to move... all the alignments (center,left,right...)remain the same.....
If both of these donot work out... then I would prefer you to use table layout and keep the text view in it....

try putting your textview inside a separate LinearLayout ,and set that layouts properties likethis:
android:layout_gravity="center_vertical" and android:orientation="vertical"
android:gravity="right"
note: dont specify layout_gravity of the textview.
hope this helps! it worked fine for me.
also you can try the solution provided here: Android Arabic text aligment

Another solution to achieve such behavior:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layoutDirection="ltr"
android:layout_weight="1"
android:gravity="end"
android:padding="16dp"
android:text="#string/locale_switch_btn" />
</LinearLayout>
Note that, for correct gravity="end" alignment, in rtl locales you should set property:
android:layoutDirection="ltr"

Customize position of handle of sliding drawer

I had researched many sources and tried but still cannot move the position of handle from center to right.
<SlidingDrawer
content >
<ImageButton <-- this is handle
android:id="#+id/handle" <-- i want to customize position
android:layout_width="50px"
android:layout_height="60px"
android:background="#drawable/icon_other" />
<LinearLayout
android:id="#+id/content"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#drawable/background_others"
android:orientation="vertical" >
//content
</LinearLayout>
</SlidingDrawer>
So what to do to customize the position?
Please give opinion. Thanks

Use a TableLayout. This works similar to a HTML Table concept, allowing you to define rows and columns where to place buttons and other components.
If you don't want to use a table layout for the entire screen, you should be able to nest the layout within another....