Can't use getLayoutInflater() in Android

Question

If my code extends AppCompatActivity:

View uploadProgressView = getLayoutInflater().inflate(R.layout.view_upload_progress, null);
UploadProgressViewHolder viewHolder = new UploadProgressViewHolder(uploadProgressView, filename);

I can use getLayoutInflater() but when I change to extends Services it is not working.

I was research on Stackoverflow from this post and receive answer and change to:

LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
View uploadProgressView = inflater.inflate(R.layout.view_upload_progress, null);
UploadProgressViewHolder viewHolder = new UploadProgressViewHolder(uploadProgressView, filename);

But it is not working, how to use getLayoutInflater()?

This throw exception: java.lang.NullPointerException

CallRecordService.addUploadToList(CallRecordService.java:167) Error at first line LayoutInflater inflater = ......

Context context;
private void addUploadToList(String uploadID, String filename) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
    View uploadProgressView = inflater.inflate(R.layout.view_upload_progress, null);
    UploadProgressViewHolder viewHolder = new UploadProgressViewHolder(uploadProgressView, filename);
    viewHolder.uploadId = uploadID;
    container.addView(viewHolder.itemView, 0);
    uploadProgressHolders.put(uploadID, viewHolder);
}

What do you mean by "But it is not working"? Is it a compile error? Or you are getting null reference? — Green goblin, Mar 15 '16 at 09:33
*I change to extends Services it is not working*, that's the expected behaviour. Service has not UI — Blackbelt, Mar 15 '16 at 09:33
Your context is not initialized. Does this code resides in a class that extends Service? — 0xDEADC0DE, Mar 15 '16 at 09:38
I can't initialize with: `Context context = new Context();` How to initialized context? — leo.Ren, Mar 15 '16 at 09:41
@leo.Ren is this code written in a `Service`? If yes, you can directly use `getSystemService()` without a context. — K Neeraj Lal, Mar 15 '16 at 09:42
@KNeerajLal , I write services to record all call. I changed my code to: `View uploadProgressView = getSystemService().inflate(R.layout.view_upload_progress, null);` but seem don't have inflate in getSystemServices() and is not working. — leo.Ren, Mar 15 '16 at 09:45
@KNeerajLal : I receive error from logcat: `error: no suitable method found for getSystemService() method ContextWrapper.getSystemService(String) is not applicable (actual and formal argument lists differ in length) method Context.getSystemService(String) is not applicable (actual and formal argument lists differ in length)` — leo.Ren, Mar 15 '16 at 09:47

K Neeraj Lal · Accepted Answer · 2016-03-15T09:53:10.403

1

Change the following line,

LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );

to

LayoutInflater inflater = (LayoutInflater) getSystemService( Context.LAYOUT_INFLATER_SERVICE );

This is because, Service is a Context. Service extends ContextWrapper which extends Context. You can also use 'this' keyword in the service.

edited Mar 15 '16 at 09:53

answered Mar 15 '16 at 09:47

K Neeraj Lal

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Thanks. It pass line inflater but throw exception in this rows: `container.addView(viewHolder.itemView, 0);` error like this: `CallRecordService.addUploadToList(CallRecordService.java:173)` – leo.Ren Mar 15 '16 at 09:55

score 0 · Answer 2 · edited Mar 15 '16 at 10:11

0

You need to add Layout to WindowManager after inflating view using LayoutManager.

windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
windowManager.addView(view, getLayoutParams());

edited Mar 15 '16 at 10:11

K Neeraj Lal

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answered Mar 15 '16 at 09:35

maveroid

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score 0 · Answer 3 · answered Mar 15 '16 at 09:39

0

If your in a class that extends Service you can use

LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

or

LayoutInflater inflater = LayoutInflater.from(this);

Both are valid because a Service is a Context

answered Mar 15 '16 at 09:39

0xDEADC0DE

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Can't use getLayoutInflater() in Android

3 Answers3