Question

It’s only a one line file.

When I call .size() with something else (like appending it to a string of spaces), it spits out something, so why would it would crash when I call the function alone?

int pos =0;
List<List<String>> mine = new ArrayList<List<String>>();
while((nextLine = csvReader.readLine()) != null) {
    mine.add(pos,new ArrayList <String>());
    for (String token : nextLine.split(",")) {

        //get next token and store it in the list
        mine.get(pos).add(token); 
        //Toast.makeText(MainActivity.this,mine.size() + " " + mine.get(pos).size(), Toast.LENGTH_SHORT).show();
    }

    //Toast.makeText(MainActivity.this, " " + mine.get(pos).size(), Toast.LENGTH_SHORT).show(); //doesn't crash here

    //  mine_end= mine.get(pos).size(); //crash here

    pos ++;
}

Here is the latest stack trace of errors:

07-17 15:52:44.987: E/wpa_supplicant(29035): Ongoing Scan action…
07-17 15:52:46.989: E/wpa_supplicant(29035): Ongoing Scan action…
07-17 15:52:48.991: E/wpa_supplicant(29035): Ongoing Scan action…
07-17 15:52:49.061: E/AndroidRuntime(1249): FATAL EXCEPTION: main
07-17 15:52:49.061: E/AndroidRuntime(1249): android.content.res.Resources$NotFoundException: String resource ID #0x1
07-17 15:52:49.061: E/AndroidRuntime(1249): at android.content.res.Resources.getText(Resources.java:221)
07-17 15:52:49.061: E/AndroidRuntime(1249): at android.widget.Toast.makeText(Toast.java:284)
07-17 15:52:49.061: E/AndroidRuntime(1249): at com.jimmyc.summer.wificollection.MainActivity.match(MainActivity.java:137)
07-17 15:52:49.061: E/AndroidRuntime(1249): at com.jimmyc.summer.wificollection.MainActivity.access$2(MainActivity.java:91)
07-17 15:52:49.061: E/AndroidRuntime(1249): at com.jimmyc.summer.wificollection.MainActivity$2$1$1.run(MainActivity.java:383)
07-17 15:52:49.061: E/AndroidRuntime(1249): at android.os.Handler.handleCallback(Handler.java:587)
07-17 15:52:49.061: E/AndroidRuntime(1249): at android.os.Handler.dispatchMessage(Handler.java:92)
07-17 15:52:49.061: E/AndroidRuntime(1249): at android.os.Looper.loop(Looper.java:130)
07-17 15:52:49.061: E/AndroidRuntime(1249): at android.app.ActivityThread.main(ActivityThread.java:3691)
07-17 15:52:49.061: E/AndroidRuntime(1249): at java.lang.reflect.Method.invokeNative(Native Method)
07-17 15:52:49.061: E/AndroidRuntime(1249): at java.lang.reflect.Method.invoke(Method.java:507)
07-17 15:52:49.061: E/AndroidRuntime(1249): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
07-17 15:52:49.061: E/AndroidRuntime(1249): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
07-17 15:52:49.061: E/AndroidRuntime(1249): at dalvik.system.NativeStart.main(Native Method)
07-17 15:52:49.071: E/(306): Dumpstate > /data/log/dumpstate_app_error

Answer 1

The error was something completely unrelated. I guess I shouldn’t use Toast messages to debug. In this case, it affected the timing and led me to believe that the .size() was causing the error.