Friday, April 20, 2012

I get a force close when I set a string array with ListView

I am making a list view, I would like it to show stuff from a String Array. Here is my Scanner class:



package com.rezoluz.planesim;

import java.util.ArrayList;

public class Scanner {

public ArrayList<String> gameList;
public String[] gameListFin;

public void getFiles() {
gameList.add("testo7r");
gameList.add("test5or");
gameList.add("te4stor");
gameList.add("tes3tor");
gameList.add("testo2r");
gameListFin = gameList.toArray(new String[gameList.size()]);
}

}


Here is my ShortcutListActivty class:



package com.rezoluz.planesim;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class ShortcutListActivity extends Activity {

Scanner scanner = new Scanner();

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.shortcuts_list);

scanner.getFiles();
ListView listView = (ListView)findViewById(R.id.shortcutsList);
listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, scanner.gameListFin));
}

}


But when I open ShortcutsListActivity up, it force closes, here is the logcat.



04-20 15:29:24.343: D/AndroidRuntime(17039): Shutting down VM 04-20
15:29:24.343: W/dalvikvm(17039): threadid=1: thread exiting with
uncaught exception (group=0x4001d7e8) 04-20 15:29:24.478:
E/AndroidRuntime(17039): FATAL EXCEPTION: main 04-20 15:29:24.478:
E/AndroidRuntime(17039): java.lang.RuntimeException: Unable to start
activity
ComponentInfo{com.rezoluz.planesim/com.rezoluz.planesim.ShortcutListActivity}:
java.lang.NullPointerException 04-20 15:29:24.478:
E/AndroidRuntime(17039): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
04-20 15:29:24.478: E/AndroidRuntime(17039): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-20 15:29:24.478: E/AndroidRuntime(17039): at
android.app.ActivityThread.access$2300(ActivityThread.java:125) 04-20
15:29:24.478: E/AndroidRuntime(17039): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-20 15:29:24.478: E/AndroidRuntime(17039): at
android.os.Handler.dispatchMessage(Handler.java:99) 04-20
15:29:24.478: E/AndroidRuntime(17039): at
android.os.Looper.loop(Looper.java:123) 04-20 15:29:24.478:
E/AndroidRuntime(17039): at
android.app.ActivityThread.main(ActivityThread.java:4627) 04-20
15:29:24.478: E/AndroidRuntime(17039): at
java.lang.reflect.Method.invokeNative(Native Method) 04-20
15:29:24.478: E/AndroidRuntime(17039): at
java.lang.reflect.Method.invoke(Method.java:521) 04-20 15:29:24.478:
E/AndroidRuntime(17039): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
04-20 15:29:24.478: E/AndroidRuntime(17039): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 04-20
15:29:24.478: E/AndroidRuntime(17039): at
dalvik.system.NativeStart.main(Native Method) 04-20 15:29:24.478:
E/AndroidRuntime(17039): Caused by: java.lang.NullPointerException
04-20 15:29:24.478: E/AndroidRuntime(17039): at
com.rezoluz.planesim.Scanner.getFiles(Scanner.java:11) 04-20
15:29:24.478: E/AndroidRuntime(17039): at
com.rezoluz.planesim.ShortcutListActivity.onCreate(ShortcutListActivity.java:19)
04-20 15:29:24.478: E/AndroidRuntime(17039): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-20 15:29:24.478: E/AndroidRuntime(17039): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
04-20 15:29:24.478: E/AndroidRuntime(17039): ... 11 more



I can see it is referencing to this: gameList.add("testo7r"); and this and this scanner.getFiles(); but I don't see the problem in there, please help! Thanks for your time and help, zeokila.





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