Sliding menu Fragment getContext return null

Question

Im using sliding menu in android and I'm having a lot of trouble to get the context throught the Fragment. The Main Activity:

    slide = new SlidingMenu(this);
    slide.setMode(SlidingMenu.LEFT);
    slide.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
    slide.setFadeDegree(0.35f);
    slide.setBehindOffsetRes(R.dimen.slidingmenu_offset);
    slide.setShadowWidthRes(R.dimen.slidingmenu_shadow_width);
    slide.attachToActivity(this, SlidingMenu.SLIDING_CONTENT);
    slide.setMenu(R.layout.left_panel);

    getActionBar().setDisplayHomeAsUpEnabled(true);

    getFragmentManager().beginTransaction().replace(R.id.leftPanel, new LeftPanel()).commit();

I tried using:

Context context;

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    Log.d("Spread",activity.toString());
    context = activity;
}

and

   this.getActivity()

It always return null. Whats the matter here?

EDIT: Use of the Context:

        com.nostra13.universalimageloader.core.ImageLoader imageLoader =  com.nostra13.universalimageloader.core.ImageLoader.getInstance();                           \
   imageLoader.init(ImageLoaderConfiguration.createDefault(context));

    DisplayImageOptions conf = new DisplayImageOptions.Builder().cacheInMemory(true).cacheOnDisc(true).build();
        if (((ParseFile)user.get("profilePicture")).getUrl() != null) imageLoader.displayImage(((ParseFile)user.get("profilePicture")).getUrl(), profPic, conf, new ImageLoadingListener() {
            @Override
            public void onLoadingStarted(String imageUri, View view) {                  
            }
            @Override
            public void onLoadingCancelled(String imageUri, View view) {
            }
            @Override
            public void onLoadingFailed(String imageUri, View view,FailReason failReason) {

            }
            @Override
            public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {

            }
        });*/

Where in your fragment's code are you calling getActivity() or using context that it's crashing? — dymmeh, Oct 15 '13 at 20:32
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {} @dymmeh — Rafael Gonçalves, Oct 15 '13 at 21:30
This question is very undervalued. This happens all the time, and should be resolved by the Android team ASAP. — milosmns, Nov 23 '15 at 09:32

score 0 · Answer 1 · answered Oct 15 '13 at 20:23

0

It will depend on where you are trying to use the context. It is possible that the onAttach() hasn't fired before you actually try and use that context. Therefore, your Context context; ends up being null. It's hard to tell without some additional code, so that is the only assumption that I can make thus far.

answered Oct 15 '13 at 20:23

Jay Snayder

4,298
4
27
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I edited the question. The onAttach() is called and the activity is not null. but when i use it, it crashes and tell me that context is null. – Rafael Gonçalves Oct 15 '13 at 20:28

score 0 · Accepted Answer · answered Oct 16 '13 at 07:55

0

On your code change: getFragmentManager().beginTransaction().replace(R.id.leftPanel, new LeftPanel(MainActivity.this)).commit();

LeftPanel{

Context  context;

LeftPanel(Context c)
{
        this.context = c;
}

}

You will get the right context in this case, hope this helps

answered Oct 16 '13 at 07:55

rahstame

2,148
4
23
53

I thought we can't use constructor on fragments. But using the supress it's all ok! Thanks @lordzden – Rafael Gonçalves Oct 16 '13 at 17:01

Sliding menu Fragment getContext return null

2 Answers2