Hi every one I’m stuck with doing a simple call to a function. This

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Asked: June 4, 20262026-06-04T06:21:36+00:00 2026-06-04T06:21:36+00:00

Hi every one I’m stuck with doing a simple call to a function. This

0

Hi every one I’m stuck with doing a simple call to a function. This is my first android app I’m from iPhone. Each time I’m doing something in the onCreate() my app crash.. I’m sure the problem is very simple

public class AndroidReaderActivity extends Activity {

    public void test(){
        File dir=new File("/assets");
        String[] listefichiers;
        int i;
        listefichiers = dir.list();
        for (i = 0; i < listefichiers.length; i++) {
            System.out.println(listefichiers[i]);
        }
    }
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        test();        
    }
}

Thanks you for your help.

Edit:
Here are the Cat LOG

05-15 19:52:55.710: E/AndroidRuntime(1956): FATAL EXCEPTION: main
05-15 19:52:55.710: E/AndroidRuntime(1956): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.infotel/com.infotel.AndroidReaderActivity}: java.lang.NullPointerException
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.os.Looper.loop(Looper.java:137)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.ActivityThread.main(ActivityThread.java:4424)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at java.lang.reflect.Method.invokeNative(Native Method)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at java.lang.reflect.Method.invoke(Method.java:511)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at dalvik.system.NativeStart.main(Native Method)
05-15 19:52:55.710: E/AndroidRuntime(1956): Caused by: java.lang.NullPointerException
05-15 19:52:55.710: E/AndroidRuntime(1956):     at com.infotel.AndroidReaderActivity.test(AndroidReaderActivity.java:14)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at com.infotel.AndroidReaderActivity.onCreate(AndroidReaderActivity.java:23)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.Activity.performCreate(Activity.java:4465)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-15 19:52:55.710: E/AndroidRuntime(1956):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
05-15 19:52:55.710: E/AndroidRuntime(1956):     ... 11 more