Android, can't see my app background image

Question

I have a problem with the background image of my app, I have set it with android:background="@drawable/image_name" and, on the preview of android studio, works fine, but, when i'm running the app, I can't see the image but only a white background, someone can help me?

here's my 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/splash"
tools:context="com.example.ivan.posteggiaTI.LoginActivity">

<com.facebook.login.widget.LoginButton
    android:id="@+id/login_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_above="@+id/editTextLoginEmail"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="48dp" />

<EditText
    android:id="@+id/editTextLoginEmail"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/login_edit_text"
    android:hint="Email"
    android:inputType="textEmailAddress"
    android:paddingBottom="0dp"
    android:paddingLeft="15dp"
    android:paddingRight="10dp"
    android:paddingTop="0dp"
    android:textColor="#000000"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginBottom="22dp"
    android:layout_above="@+id/editTextLoginPassword"
    android:layout_alignParentStart="true" />

<EditText
    android:id="@+id/editTextLoginPassword"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/login_edit_text"
    android:hint="Password"
    android:inputType="textPassword"
    android:paddingBottom="0dp"
    android:paddingLeft="15dp"
    android:paddingRight="15dp"
    android:paddingTop="0dp"
    android:textColor="#000000"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_above="@+id/textViewRegister"
    android:layout_alignParentStart="true"
    android:layout_marginBottom="34dp" />

<TextView
    android:id="@+id/textViewRegister"
    android:layout_width="160dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:background="@drawable/button_blue_login"
    android:gravity="center_vertical|center_horizontal"
    android:text="Registrati"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textColor="#ffffff"
    android:layout_alignTop="@+id/textViewLogin"
    android:layout_toStartOf="@+id/textViewLogin" />

<TextView
    android:id="@+id/textViewLogin"
    android:layout_width="160dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:background="@drawable/button_blue_login"
    android:gravity="center_vertical|center_horizontal"
    android:text="Login"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textColor="#ffffff"
    android:layout_marginBottom="27dp"
    android:layout_alignParentBottom="true"
    android:layout_alignParentEnd="true" /></RelativeLayout>

Try to change background from code programmatically like here http://stackoverflow.com/questions/12523005/how-set-background-drawable-programmatically-in-android — DavidBalas, Aug 31 '15 at 15:34
@DavidBalas i tryed in this way `RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.relativeLayoutLogin); relativeLayout.setBackground(getResources().getDrawable(R.drawable.splash));` but doesn't work — Ivan Notarstefano, Aug 31 '15 at 15:42
it didn't work because you didn't name your RelativeLayout id as relativeLayoutLogin, you need to add id attribute.. — DavidBalas, Aug 31 '15 at 15:44
Can you tell me the size of splash image and in which drawable folder you kept it? — Priya Singhal, Aug 31 '15 at 16:39
Yes, the image is available in all drawable folder, the dimesion of the images are the same 752x1336 502x829 377x669 252x447 @DavidBalas I have add the id attribute on the relative layout before try — Ivan Notarstefano, Sep 01 '15 at 10:59

score 3 · Accepted Answer · answered Aug 31 '15 at 17:37

Sometimes android studio doesnt install the new apk while running. It bring the previous activity to front.

Follow the steps.

Make sure you have the image in drawable folder.
Rebuild the application. Build->Rebuild application
Uninstall the application from the emulator or phone(Testing device).
Run the application.

When you put your image in drawable folder. Aptly choose for which screen density you want which picture.

As there are drawable-ldpi,drawable-mdpi,drawable-hdpi etc... and a normal drawable folder. If android studio cant find a image in these qualifier drawable folder then it will look up in the normal drawable folder.

score 0 · Answer 2 · answered Aug 31 '15 at 16:05

0

Use an ImageView as the first element in your RelativeLayout. Then, set your drawable to src of the ImageView and set scaleType to fitXY so that your background is shown properly.

answered Aug 31 '15 at 16:05

Buddy

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Android, can't see my app background image

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