Ändern der ImageView-Quelle beim Auffüllen einer ListView ⇐ Android

[Anonymous]

Es gibt bereits einige Fragen zu diesem Thema, aber ich kann nicht finden, was falsch ist. Ich habe eine ListView mit einer ImageView und einer TextView. Die Listenansicht verwendet item_layout.xlm, das beide Elemente enthält.
Ich kann die TextView in der ListView mit einem ArrayAdapter füllen, erhalte jedoch eine NullPointerException, wenn ich versuche, die Quelle der ImageView zu ändern.

Code: Select all

 private void populateListViewLongFronde() {

Cursor cursor = myDb.getAllDifEntries("long_fronde");
ListView myList = (ListView) findViewById(R.id.listView);

ArrayAdapter arrayAdapter = new ArrayAdapter(
this,
R.layout.item_layout,
R.id.textView3,
DBAdapter.AlResults );

myList.setAdapter(arrayAdapter);

ImageView myImage = (ImageView) findViewById(R.id.myImage);
myImage.setImageResource(R.drawable.deltoide);

}

Und das ist der Logcat:

Code: Select all

09-15 02:38:50.319    1769-1769/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gobtron.database_test/com.gobtron.database_test.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.gobtron.database_test.MainActivity.populateListViewLongFronde(MainActivity.java:119)
at com.gobtron.database_test.MainActivity.onCreate(MainActivity.java:44)
at android.app.Activity.performCreate(Activity.java:4466)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
            at android.app.ActivityThread.access$600(ActivityThread.java:123)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4424)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
            at dalvik.system.NativeStart.main(Native Method)