Question

I have an android program. It has a button which when clicked is supposed to open up a listview of various strings.

But the problem is, as soon as I click on the button, the listview opens up, but my original android program crashes. ( ListView is in another class which now begins to run).

            public void onClick(View v) {
                Intent intent = new Intent(v.getContext(), MemoryReader.class);
                startActivityForResult(intent, 0);
            }

This is the code snippet. What am I doing wrong?

Also, the thing I want is that I click on the button, a checkbox list opens up, I select various things and then come back to the original screen.

The idea I had right now was to implement a listview with checkboxes ( I read somewhere, this is possible) and then use the getAllCheckedOptions() function to retrieve whatever was checked.

IF there is a simpler way to tackle my problem, please point me to there.

Any help is much appreciated.

Answer 1

You are starting for a result without the possiblility to tell where the result is coming from. It is not good. Change 0 for smth else better.

Here are some pieces of my working code that calls an activity for result:

————————————- PackVideo activity ————————————–

calling for ServerSetActivity

Intent serverSetIntent = new Intent();
serverSetIntent.setClass(this, ServerSetActivity.class);
startActivityForResult(serverSetIntent, CHANGE_IP);

constants setting and result catching:
(I have them together, because only here in catching both costants meet)

static public int CHANGE_IP = 1000;
static public int CHANGE_IP_DONE = 1001;

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // If the request was for CHANGE_IP and the request was CHANGE_IP
    if (resultCode == CHANGE_IP_DONE && requestCode == CHANGE_IP) {
        readBaseInfoFromServer(getApplicationContext());
        startVideoPlayerService(getApplicationContext());
        setCurrentChannelAndPlay(getApplicationContext(), 0);
    }
}

———————————– ServerSetActivity —————————————-

ending of the called activity

final Intent intent = new Intent();
setResult(PackVideo.CHANGE_IP_DONE, intent);
finish();

Put here “onCreate” and both layouts of MemoryReader, please.