Android EditText doesn't show the Keyboard

Question

I have a screen with three EditText's, and one of then, the first one, in the top of the screen doesn't call the keyboard when I click on it. I'm not using an AVD, I'm using my own device, and tested in others devices and same result.

I'll put the screen here and the xml codes... there is nothing diferent between the EditTexts, just position. To make an input in that EditText I need to select one of the EditText above, and then the keyboard shows up. At least it doesn't hide when I select the first EditText again. I've already try the setFocus(true) and it doesn't solve my problem. please, help me!

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:background="@drawable/background"
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=".SaldoCadastro" >

<TextView
    android:id="@+id/tvTituloReg"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:text="Saldo Banco"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView
    android:id="@+id/tvErroSenha1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/tvTituloReg"
    android:layout_marginTop="17dp"
    android:text="Insert on the field below how much you have in your bank." />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/tvErroSenha1"
    android:layout_below="@+id/tvErroSenha1"
    android:layout_marginTop="41dp"
    android:text="Insert on the field below how much is your credit card limit." />

<EditText
    android:id="@+id/etSaldo"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/tvErroSenha1"
    android:ems="10"
    android:inputType="numberDecimal" >

    <requestFocus />
</EditText>

<EditText
    android:id="@+id/etCartaoLimite"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView2"
    android:layout_below="@+id/textView2"
    android:ems="10"
    android:inputType="numberDecimal" />

<TextView
    android:id="@+id/textView3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/etCartaoLimite"
    android:layout_below="@+id/etCartaoLimite"
    android:text="About your credt card how much you&apos;ve spent already." />

<EditText
    android:id="@+id/etCartao"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView3"
    android:layout_below="@+id/textView3"
    android:ems="10"
    android:inputType="numberDecimal" />

<Button
    android:id="@+id/btRegisterSaldo"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/etCartao"
    android:layout_below="@+id/etCartao"
    android:layout_marginLeft="14dp"
    android:text="Register" />

Answer 1

Please add attribute android:windowSoftInputMode="adjustResize" in AndroidManifest.xml

<activity
    ......
    android:windowSoftInputMode="adjustResize">

    ...
</activity>

Answer 2

Check your layout.xml if your layout implement android:descendantFocusability="blocksDescendants" remove it