I've just created a prototype of interface for my android app and tried to run it. Unfortunately I get an error that my app has stopped unexpectedly (my reputation doesn't allow me to post images so follow my links): screenshot of error message This is layout mode of editing. Everything looks as I want so there shouldn't be errors: mobileka.freehostia.com/3.png (I can post only one hyperlink...) This is my main.xml code: <code> <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:gravity="top" android:background="@drawable/back" > <TextView android:id="@+id/score" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text = "@string/scoreT" android:textColor="@string/scoreColor" android:gravity = "left" android:typeface="serif" android:textStyle="bold|italic" android:textSize="16sp" android:paddingLeft = "10px" android:paddingTop="4px"/ <TextView android:id = "@+id/scoreTxt" android:layout_toRightOf="@+id/score" android:textSize="16sp" android:paddingTop = "5px" android:paddingLeft="4px" android:typeface="serif" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" 0" android:textColor="@string/scoreTextColor" android:gravity = "left"/> <TextView android:id = "@+id/scoreSeparator" android:layout_toRightOf="@+id/scoreTxt" android:textSize="16sp" android:paddingTop = "3px" android:paddingLeft="4px" android:typeface="serif" android:textStyle="bold" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="|" android:textColor="@string/scoreColor" android:gravity = "left"/> <TextView android:id = "@+id/timerTxt" android:layout_alignParentRight="true" android:textSize="16sp" android:paddingRight="10px" android:paddingTop="4px" android:typeface="serif" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@string/scoreTextColor" android:gravity = "right" android:text="00:00" /> <TextView android:id = "@+id/timer" android:layout_toLeftOf="@+id/timerTxt" android:textColor="@string/scoreColor" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="16sp" android:padding = "3px" android:typeface="serif" android:textStyle="bold|italic" android:text="@string/timerT" android:gravity = "left"/> <TextView android:id = "@+id/timerSeparator" android:layout_toLeftOf="@+id/timer" android:textSize="16sp" android:paddingTop = "3px" android:paddingLeft="4px" android:typeface="serif" android:textStyle="bold" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="|" android:textColor="@string/scoreColor" android:gravity = "left"/> <ImageButton android:id="@+id/buttonOne" android:layout_below="@+id/score" android:layout_marginTop="40px" android:layout_marginLeft="14px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:clickable="true" android:src="@drawable/inactive"/> <ImageButton android:id="@+id/buttonTwo" android:layout_toRightOf="@+id/buttonOne" android:layout_marginTop="63px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonThree" android:layout_toRightOf="@+id/buttonTwo" android:layout_marginTop="63px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonFour" android:layout_toRightOf="@+id/buttonThree" android:layout_marginTop="63px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonFive" android:layout_below="@+id/buttonOne" android:layout_marginTop="40px" android:layout_marginLeft="14px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonSix" android:layout_toRightOf="@+id/buttonFive" android:layout_marginTop="164px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonSeven" android:layout_toRightOf="@+id/buttonSix" android:layout_marginTop="164px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonEight" android:layout_toRightOf="@+id/buttonSeven" android:layout_marginTop="164px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonNine" android:layout_below="@+id/buttonEight" android:layout_marginTop="40px" android:layout_marginLeft="14px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonTen" android:layout_toRightOf="@+id/buttonNine" android:layout_marginTop="264px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonEleven" android:layout_toRightOf="@+id/buttonTen" android:layout_marginTop="264px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> <ImageButton android:id="@+id/buttonTwelve" android:layout_toRightOf="@+id/buttonEleven" android:layout_marginTop="264px" android:layout_marginLeft="10px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/inactive" /> And this is my logcat errors (p.s. line #12 is the first TextView in main.xml): 03-26 22:59:31.670: WARN/dalvikvm(185): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 03-26 22:59:31.727: ERROR/AndroidRuntime(185): Uncaught handler: thread main exiting due to uncaught exception 03-26 22:59:31.784: ERROR/AndroidRuntime(185): java.lang.RuntimeException: Unable to start activity ComponentInfo{kz.androidmarket.www.randomtest1/kz.androidmarket.www.randomtest1.randomTest1}: android.view.InflateException: Binary XML file line #12: Error inflating class 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.os.Handler.dispatchMessage(Handler.java:99) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.os.Looper.loop(Looper.java:123) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.ActivityThread.main(ActivityThread.java:4363) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at java.lang.reflect.Method.invokeNative(Native Method) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at java.lang.reflect.Method.invoke(Method.java:521) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at dalvik.system.NativeStart.main(Native Method) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): Caused by: android.view.InflateException: Binary XML file line #12: Error inflating class 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.view.LayoutInflater.createView(LayoutInflater.java:513) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.view.LayoutInflater.inflate(LayoutInflater.java:407) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.Activity.setContentView(Activity.java:1622) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at kz.androidmarket.www.randomtest1.randomTest1.onCreate(randomTest1.java:11) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): ... 11 more 03-26 22:59:31.784: ERROR/AndroidRuntime(185): Caused by: java.lang.reflect.InvocationTargetException 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.widget.TextView.(TextView.java:320) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at java.lang.reflect.Constructor.constructNative(Native Method) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at java.lang.reflect.Constructor.newInstance(Constructor.java:446) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.view.LayoutInflater.createView(LayoutInflater.java:500) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): ... 22 more 03-26 22:59:31.784: ERROR/AndroidRuntime(185): Caused by: android.content.res.Resources$NotFoundException: File #ffff9900 from drawable resource ID #0x7f040002: .xml extension required 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.content.res.Resources.loadColorStateList(Resources.java:1820) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.content.res.TypedArray.getColorStateList(TypedArray.java:289) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): at android.widget.TextView.(TextView.java:627) 03-26 22:59:31.784: ERROR/AndroidRuntime(185): ... 26 more Could anybody help me?