Develop Reference

Android Emulator Keyboard tab key navigation is not working

I'm using EclipseADT to develop apps. Now, the emulator keyboard works fine and I'm able to enter the values in EditTexts, but the tab navigation doesn't work and it's cumbersome to click through each EditText when there are many fields. I've already ensured that the hardware is enabled in my device configuration as suggested in this answer:
hw.keyboard=yes
From my observation, this has started occurring since I also installed AndroidStudio besides Eclipse just to test this IDE. But after installing AS, I'd also updated the AndroidSDK, so it might be caused due to that also.
UPDATE: New Day Entry Screen

This issue got resolved after I changed the layout xml of my activity as follows:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/newdayLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.prahladyeri.android.droidwells.NewDayActivity" >
<TextView
android:id="#+id/lblnewdaySiteName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Some very long site name"
android:textStyle="bold" />
<TextView
android:id="#+id/lblnewdayDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/lblnewdaySiteName"
android:text="01/01/2015" />
<Button
android:id="#+id/cmdnewdayEditDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/lblnewdayDate"
android:text="Edit Date" />
<Button
android:id="#+id/cmdnewdaySave"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:text="SAVE" />
<Button
android:id="#+id/cmdnewdayCancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/cmdnewdaySave"
android:layout_alignTop="#+id/cmdnewdaySave"
android:text="Cancel" />
<Button
android:id="#+id/cmdnewdayTanks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_toRightOf="#+id/cmdnewdayCancel"
android:layout_alignTop="#+id/cmdnewdayCancel"
android:text="Tanks" />
</RelativeLayout>

Software keyboard move editTexts for android

I'm trying to get the editTexts, and sign in button to move up when the software keyboard is out however I want the background to not be compressed(I'm going to add an image soon). I have the TextView(Login), two EditTexts(email and password) and signin button in a ScrollView because I thought that might help however I have not be able to figure anything out.
http://i.imgur.com/vlYifc6.png
http://i.imgur.com/vlYifc6.png
This is the xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/scrollView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" >
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:gravity="center"
android:id="#+id/textLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Login"
android:id="#+id/loginView"
android:textSize="22dp"
android:layout_above="#+id/textLayout"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/emailTextfield"
android:inputType="textEmailAddress"
android:background="#android:drawable/edit_text"
android:textColor="#android:color/primary_text_light"
android:text="andresc1305#yahoo.com"
android:hint="Email" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="Password"
android:text="Andres123"
android:background="#android:drawable/edit_text"
android:textColor="#android:color/primary_text_light"
android:ems="10"
android:id="#+id/passwordTextfield" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SIGN IN"
android:background="#android:color/transparent"
android:textSize="24dp"
android:id="#+id/signinButton"
android:layout_below="#+id/textLayout"
android:layout_centerHorizontal="true"
android:onClick="onSigninClick"/>
</LinearLayout>
</ScrollView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Forgot your password?"
android:background="#android:color/transparent"
android:textSize="14dp"
android:id="#+id/forgotButton"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:onClick="onPasswordRecoverClick"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Register"
android:background="#android:color/transparent"
android:textSize="14dp"
android:id="#+id/registerButton"
android:layout_alignTop="#+id/forgotButton"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:onClick="onRegisterClick"/>
</RelativeLayout>

Look at this answer. In short, your problem can most likely be solved by setting the following in your AndroidManifest.xml inside the relevant activity or application element:
android:windowSoftInputMode="adjustResize"

#PPartisan
This is without:
android:windowSoftInputMode="adjustResize"
http://i.imgur.com/tbNioU2.png
This is with:
http://i.imgur.com/7ZePHjS.png
Beside the compression you can see my "Forgot your password" and "Register" buttons but I have those outside my ScrollView in the XML. Is there a way to scroll the LinearLayout (which contains the Login(TextView, email(EditText), password(EditText), and Signin(button) up when the software keyboard comes up?
The answer by zmilojko seems like what I want to do but he only says to add the ScrollView and not what to do after that has been added. Is there something I can place in the to make it move up when the software keyboard comes up?

see this thread, i think it can help you
layout of the screen moves up when keyboard is displayed
or just try to put this in your xml:
android:windowSoftInputMode="adjustPan"
or this
android:windowSoftInputMode="adjustNothing"
Seems like it works different in each case.

Number picker in android not showing properly

I'm starting to build an app with android studio and right away I'm having a bit of an issue. Currently my number pickers look like this in the XML preview:
But when I run the app (on the emulator) it looks like this:
There is a text view that you can't see in the preview but appears when the app is run, that is why you see the text "Time's up" in the emulator screenshot. What I'm wondering is why are the number pickers so close to my textview and off to the left? I don't mind the change in style (in fact I welcome it) but I can't figure out why they moved. Any help is greatly appreciated! Here is my XML code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.skytbest.intervaltrainer.MainActivity">
<TextView
android:id="#+id/timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:paddingRight="10dip"
android:paddinBottom="50dip"
android:textSize="50dp"
/>
<Button
android:id="#+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:text="Start" />
<NumberPicker
android:id="#+id/numberPicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/timer"
android:layout_toLeftOf="#+id/timer"
android:paddingTop="50dp" />
<NumberPicker
android:id="#+id/numberPicker2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/numberPicker"
android:layout_toRightOf="#+id/numberPicker"
android:paddingTop="50dp" />
</RelativeLayout>

Here is a working layout using the suggestion in my comment. Note that it is helpful to put some text in the TextView to better enable the UI designer to show the layout. Even then it sometimes does not match what you see on screen, especially when you have invalid combinations of layout constraints.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.skytbest.intervaltrainer.MainActivity">
<TextView
android:id="#+id/timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentTop="true"
android:text="Label"
android:paddingBottom="50dp"
android:paddingTop="50dp"
android:textSize="50dp"
/>
<Button
android:id="#+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:text="Start"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_below="#id/timer">
<NumberPicker
android:id="#+id/numberPicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<NumberPicker
android:id="#+id/numberPicker2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>

You need to set setMinValue and setMaxValue otherwise it will get stack on 0.

Error when changing layout

I've created a simple layout with few buttons and text fields. I keep receiving errors when I change something using graphical layout editor. Sometimes I just move the button and get errors during compilation like this:
*R cannot be resolved to a variable MainActivity.java /USB_Host_test/src/gra/usb_host_test line 103
I have not deleted anything, so unresolved variables must not appear.
Sometimes problems appear at runtime like was described here. Cleaning the project doesn't help. Few times I've solved the problem by doing some minor changes to xml (adding/removing comments), but it's rather annoying. Is it a bug in an ADT or I'm doing something wrong?
I use ADT Build: v21.1.0-569685 from Android.com. Targe API level is 17, Min API level is 12.
Here is the xml code:
{
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="#+id/btEnumerate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minHeight="70dip"
android:text="Текст на отправку" />
<TextView
android:id="#+id/tbUSBRxData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/SendF"
android:layout_centerHorizontal="true"
android:text="Medium Text1"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/btOpen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/btEnumerate"
android:layout_below="#+id/btEnumerate"
android:layout_marginLeft="26dp"
android:layout_marginTop="31dp"
android:text="#string/Open" />
<Button
android:id="#+id/USBRead"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/btEnumerate"
android:layout_below="#+id/btOpen"
android:layout_marginTop="42dp"
android:text="USB Read" />
<Button
android:id="#+id/SendF"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/USBRead"
android:layout_below="#+id/tbUSBD"
android:text="USB Write" />
<TextView
android:id="#+id/tbUSBD"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/USBRead"
android:layout_centerHorizontal="true"
android:text="Получено от USB:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/btRead"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/SendF"
android:layout_below="#+id/SendF"
android:layout_marginTop="30dp"
android:text="Остновить службу" />
<EditText
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/btOpen"
android:layout_alignRight="#+id/tbUSBD"
android:layout_alignTop="#+id/btEnumerate"
android:layout_marginLeft="36dp"
android:layout_toRightOf="#+id/btEnumerate"
android:autoLink="none"
android:ems="10"
android:inputType="textMultiLine"
android:linksClickable="false"
android:maxLines="10"
android:minLines="4"
android:scrollbarStyle="outsideOverlay"
android:scrollbars="vertical"
android:selectAllOnFocus="true" >
<requestFocus />
</EditText>
</RelativeLayout>
}

Android Button text not centered when using API 17 for rendering

In the graphical view of layout, when I choose API 15 or lower from the button shown in the image below, the text in the encircled buttons looks fine.
When I choose API 17, the text is displaced even though the xml code is same. Changing the button padding does not help.
Is this just a problem with Eclipse or is it possible that new versions of android may see this displaced text?
What's the workaround to fix this?
XML code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HomeActivity" >
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_margin="3dp" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="100dp"
android:src="#drawable/label" />
</LinearLayout>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/linearLayout1"
android:layout_below="#+id/linearLayout1"
android:layout_marginTop="20dp"
android:text="#string/about_title"
android:textSize="20sp" />
<TextView
android:id="#+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView1"
android:layout_alignRight="#+id/linearLayout1"
android:layout_below="#+id/textView1"
android:layout_marginTop="5dp"
android:text="#string/temp" />
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView2"
android:layout_alignRight="#+id/textView2"
android:layout_below="#+id/textView2"
android:layout_marginTop="20dp"
android:baselineAligned="false" >
<Button
android:id="#+id/button1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/news" />
<Button
android:id="#+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/tournaments" />
<Button
android:id="#+id/button3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/results" />
</LinearLayout>

android:gravity="center" did not help
I restarted eclipse twice. Strangely it did not help in the first restart but it looked fine after the second one. Also, its working fine on device.
Apologies for the question, I must have waited before posting the question.

Not sure if the default style for Buttons changed in API17... possibly...
Anyway, adding android:gravity="center" should be fixing this for you.

i don't know i faced this problem check restart a eclipse.. and check..

adding android:gravity="center" should be fixing this for you