Android setdrawable from another class

[HBK.TEAM]

Here's my code. I am trying to set background of a linear layout. But this xml (rowback) is not my main activity content, so gives errors. how can I set some XML from the class which doesn't have that XML in its content?\[code\]setContentView(R.layout.activity_quick_search_products);...rowb = (LinearLayout)findViewById(R.id.rowback);...final Drawable d = getResources().getDrawable(R.drawable.denemebut3);d.setAlpha(100);rowb.setBackgroundDrawable(d);\[/code\]Logcat:\[code\]03-30 02:52:50.822: D/AndroidRuntime(14677): Shutting down VM03-30 02:52:50.822: W/dalvikvm(14677): threadid=1: thread exiting with uncaught exception (group=0x40c841f8)03-30 02:52:50.822: E/AndroidRuntime(14677): FATAL EXCEPTION: main03-30 02:52:50.822: E/AndroidRuntime(14677): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.vitrinn/com.vitrinn.QuickSearchProducts}: java.lang.NullPointerException03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1968)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1993)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.ActivityThread.access$600(ActivityThread.java:127)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1159)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.os.Handler.dispatchMessage(Handler.java:99)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.os.Looper.loop(Looper.java:137)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.ActivityThread.main(ActivityThread.java:4507)03-30 02:52:50.822: E/AndroidRuntime(14677): at java.lang.reflect.Method.invokeNative(Native Method)03-30 02:52:50.822: E/AndroidRuntime(14677): at java.lang.reflect.Method.invoke(Method.java:511)03-30 02:52:50.822: E/AndroidRuntime(14677): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:978)03-30 02:52:50.822: E/AndroidRuntime(14677): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)03-30 02:52:50.822: E/AndroidRuntime(14677): at dalvik.system.NativeStart.main(Native Method)03-30 02:52:50.822: E/AndroidRuntime(14677): Caused by: java.lang.NullPointerException03-30 02:52:50.822: E/AndroidRuntime(14677): at com.vitrinn.QuickSearchProducts.onCreate(QuickSearchProducts.java:69)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.Activity.performCreate(Activity.java:4469)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)03-30 02:52:50.822: E/AndroidRuntime(14677): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1932)03-30 02:52:50.822: E/AndroidRuntime(14677): ... 11 more\[/code\]