android - Textview changes background color for no reason -

i have 2 textviews in activity, defined xml - both background color gray. in app, set 1 of textviews background color blue. works expected.

but : when turn device (rotate), or leave app , come again, other textview blue - same color 1 set intentionally...!?

when leave app , start again second textview stays blue. when stop app running (kill) , start again second textview gray. same problem appears rotate device or start app next time.

problem device running 4.1.1. - same app on 2.3.4 device runs no problem.

sdk tools 22.0.1, eclipse juno service release 2 32 bit , windows 7 64 bit

edit : same problem on sdk tools 14, eclipse indigo sr1 32 bit on windows 7 32 bit

i have no idea going on there. kind of undesired magic. please me?

below real source code no modification problem project.

mainactivity.java:

package com.example.test;  import android.app.activity; import android.os.bundle; import android.widget.textview;  public class mainactivity extends activity{      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          textview tv1 = (textview) findviewbyid(r.id.textview1);          tv1.setbackgroundcolor(0xff33b5e5);      }  } 

acitivity_main.xml:

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >      <textview         android:id="@+id/textview1"         android:layout_width="fill_parent"         android:layout_height="100dp"         android:background="#cccccc" />      <textview         android:id="@+id/textview2"         android:layout_width="fill_parent"         android:layout_height="100dp"         android:layout_margintop="20dp"         android:background="#cccccc" />  </linearlayout> 

androidmanifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.example.test"     android:versioncode="1"     android:versionname="1.0" >      <uses-sdk         android:minsdkversion="8"         android:targetsdkversion="17" />      <application         android:icon="@drawable/ic_launcher"         android:label="textview test" >         <activity android:name="com.example.test.mainactivity" >             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity>     </application>  </manifest> 

edit 2: make things stranger: if change color of textview2 i.e. #cdcdcd problem not come. in case both colors (textview1 , textview2) identical in xml.

i found solution problem - although not explanation. problem exists if initial colors of both textviews in xml identical. solution therefore give textviews different colors.

so, if have same problem, works me:

acitivity_main.xml: problem

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >      <textview         android:id="@+id/textview1"         android:layout_width="fill_parent"         android:layout_height="100dp"         android:background="#cccccc" />      <textview         android:id="@+id/textview2"         android:layout_width="fill_parent"         android:layout_height="100dp"         android:layout_margintop="20dp"         android:background="#cccccc" />  </linearlayout> 

acitivity_main.xml: without problem

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >      <textview         android:id="@+id/textview1"         android:layout_width="fill_parent"         android:layout_height="100dp"         android:background="#ffcccccc" />      <textview         android:id="@+id/textview2"         android:layout_width="fill_parent"         android:layout_height="100dp"         android:layout_margintop="20dp"         android:background="#fecccccc" />  </linearlayout> 

in other words have used different color (actually here different transparency) - , problem gone. not believe if told me.