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Android Build a Weather App (2015) Building the Weather UI Starting at the Center

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,252 Points
Posted by Jonathan Grieve
Jonathan Grieve
Treehouse Moderator 91,252 Points

[SOLVED] I seem to be having trouble getting the background colour to appear on the emulator

Hi all,

I'm having some trouble getting the background colour on the main activity file to appear on the emulator. I use the default Android Studio Emulator and I'm not sure what's happening.

It appears fine in Android preview but as Ben says you can't always trust that. My version of Android Studio doesn't have the colour picker built in. You can pick from a certain set of options or of course, paste the hexadecimal code into text view. Neither method seems to work.

Here's my XML

activity_main.xml 
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/activity_main"
    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="uk.co.jonniegrieve.stormy.MainActivity"
    tools:background="?android:attr/colorMultiSelectHighlight">

    <TextView
        android:text="100"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/temperatureLabel"
        android:textColor="@android:color/white"
        android:textSize="150sp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"/>

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:srcCompat="@drawable/degree"
        android:layout_alignTop="@+id/temperatureLabel"
        android:layout_toRightOf="@+id/temperatureLabel"
        android:layout_toEndOf="@+id/temperatureLabel"
        android:id="@+id/imageView"
        android:layout_marginTop="50dp"/>
</RelativeLayout>

and my log data. 

02/23 17:42:34: Launching app
$ adb shell am start -n "uk.co.jonniegrieve.stormy/uk.co.jonniegrieve.stormy.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Client not ready yet..Waiting for process to come online
Connected to process 3018 on device emulator-5554
W/System: ClassLoader referenced unknown path: /data/app/uk.co.jonniegrieve.stormy-1/lib/x86
D/MainActivity: Main UI code is running!
D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true

                  [ 02-23 17:42:35.884  3018: 3018 D/         ]
                  HostConnection::get() New Host Connection established 0xa9f5f180, tid 3018


                  [ 02-23 17:42:35.885  3018: 3018 W/         ]
                  Process pipe failed

                  [ 02-23 17:42:35.909  3018: 3037 D/         ]
                  HostConnection::get() New Host Connection established 0xa9f5f4c0, tid 3037
I/OpenGLRenderer: Initialized EGL, version 1.4
E/EGL_emulation: tid 3037: eglSurfaceAttrib(1165): error 0x3009 (EGL_BAD_MATCH)
**W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xaaa8c580, error=EGL_BAD_MATCH**
V/MainActivity: {json data.... json data....},{"time":1487875200,"p
I/MainActivity: FROM JSON: America/Los_Angeles
D/MainActivity: 9:43 AM

Where I think it is going wrong is this line. Any idea how to fix?

W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xaaa8c580, error=EGL_BAD_MATCH**

1 Answer

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,252 Points
Jonathan Grieve
Jonathan Grieve
Treehouse Moderator 91,252 Points

I was able to solve this two-fold.

First, I set the following 

    tools:background="#fffc9708"

to

    android:background="#fffc9708"

in the activity_main.xml file.

Also there appears to be a bit of a quirk in the current version of Android Studio (2.2.3). When you add an image view, to add the degree image the source picker automatically comes up. But I kept finding that the image would not appear in the default emulator. To fix this I had to manually add the image from the property inspector and go through the source that way. So, if you find the picker automatically comes up, try cancelling that and run it through the image view properties. :)