Unable to start activity ComponentInfo in Android after crash

I don't know where this error comes from. It appears when I start the app and crashes!

Error message and stack trace:

09-16 17:57:32.022    2441-2441/com.example.tobias.uebung1 E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.tobias.uebung1, PID: 2441
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tobias.uebung1/com.example.tobias.uebung1.main}: android.content.res.Resources$NotFoundException: String resource ID #0xfffffffd
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
            at android.app.ActivityThread.-wrap11(ActivityThread.java)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:148)
            at android.app.ActivityThread.main(ActivityThread.java:5417)
            at java.lang.reflect.Method.invoke(Native Method)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
     Caused by: android.content.res.Resources$NotFoundException: String resource ID #0xfffffffd
            at android.content.res.Resources.getText(Resources.java:312)
            at android.widget.TextView.setText(TextView.java:4417)
            at com.example.tobias.uebung1.main.Main(main.java:483)
            at com.example.tobias.uebung1.main.onCreate(main.java:100)
            at android.app.Activity.performCreate(Activity.java:6237)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
            at android.app.ActivityThread.-wrap11(ActivityThread.java)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:148)
            at android.app.ActivityThread.main(ActivityThread.java:5417)
            at java.lang.reflect.Method.invoke(Native Method)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Thank you for your help!

Read A third Line

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tobias.uebung1/com.example.tobias.uebung1.main}: android.content.res.Resources$NotFoundException: String resource ID #0xfffffffd

android.content.res.Resources$NotFoundException : Means You add Your Activity In AndroidManifest.xml File..

Or check Java File Or XML File name...