Butterknife: Add ButterKnife.inject(this); in BaseActivity instance of each child activity.

[sanjaykakadiya]

Hi,

I want to Add ButterKnife.inject(this); in BaseActivity like this.

public class BaseActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ButterKnife.inject(this);
}
}

and use it in child activity like

public class TestActivity extends BaseActivity {

@InjectView(R.id.lv_bom)
ListView lvTest;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bomconfiguration_list);

    lvTest.setAdapter(adpter);
}

}

How can I use ButterKnife in this case.
I don't want add ButterKnife.inject(this); in all activity.

[JakeWharton]

This works. if it doesn't work, file a specific bug.

[artem-zinnatullin]

I think author of the issue means the problem of calling ButterKnife
inject() in super.onCreate(), which will be called before setContentView()
in child class.
29 мая 2015 г. 12:18 PM пользователь "Jake Wharton" <
[email protected]> написал:

This works. if it doesn't work, file a specific bug.

—
Reply to this email directly or view it on GitHub
https://github.com/JakeWharton/butterknife/issues/268#issuecomment-106753508
.

[JakeWharton]

Gotcha. Butter Knife is not magical and is actually a very boring, stupid, and predicable library. If you call Butter Knife before setContentView you'll get 0 views.

[artem-zinnatullin]

To the author of the issue: if you really want to call ButterKnife#inject()
only from Base class, take a look at Activity#onPostCreate() or override
Activity#setContentView(), call super.setContentView() and then
ButterKnife#inject().

For Fragments you can use Fragment#onViewCreated().

Personally, I don't think that view binding in Base class is good idea.
29 мая 2015 г. 12:27 PM пользователь "Jake Wharton" <
[email protected]> написал:

Gotcha. Butter Knife is not magical and is actually a very boring, stupid,
and predicable library. If you call Butter Knife before setContentView
you'll get 0 views.

—
Reply to this email directly or view it on GitHub
https://github.com/JakeWharton/butterknife/issues/268#issuecomment-106756557
.

[JakeWharton]

The library was designed to be called in a base class and will no-op if the
implementing class has no injections.

On Fri, May 29, 2015 at 2:39 AM Artem Zinnatullin [email protected]
wrote:

To the author of the issue: if you really want to call ButterKnife#inject()
only from Base class, take a look at Activity#onPostCreate() or override
Activity#setContentView(), call super.setContentView() and then
ButterKnife#inject().

For Fragments you can use Fragment#onViewCreated().

Personally, I don't think that view binding in Base class is good idea.
29 мая 2015 г. 12:27 PM пользователь "Jake Wharton" <
[email protected]> написал:

Gotcha. Butter Knife is not magical and is actually a very boring,
stupid,
and predicable library. If you call Butter Knife before setContentView
you'll get 0 views.

—
Reply to this email directly or view it on GitHub
<
https://github.com/JakeWharton/butterknife/issues/268#issuecomment-106756557

.

—
Reply to this email directly or view it on GitHub
https://github.com/JakeWharton/butterknife/issues/268#issuecomment-106759165
.

[sanjaykakadiya]

Got it. How can use as I describe above.

Thanks for your help.
Thank you.

[ytRino]

overriding setContentView(int) and setContentView(View) then call inject works fine.
(might needs some care if you call setContentView multiple times)

[jemshit]

Is there any problem if i inject it on BaseActivity like
ButterKnife.bind(BaseActivity.this);
and inject in ChildActivity which extends BaseActivity too like
ButterKnife.bind(ChildActivity.this);

? Or just injecting in Base is enough?

[JakeWharton]

That will do the same injection twice since both of those this's refer to the same instance.

[rakshith-ravi]

Hey there! I know this is really old but I just wanted to leave this here for anyone who gets here through Google like I did. I had the same issue. For my scenario, in my BaseActivity class, I used the onContentChanged() function to bind the activity to the current content. For my BaseFragment class, I used the onViewCreated() function to bind my view so that I never have to bind in my sub classes and I can use binding without worrying about anything. Peace :v:

[HassanAlizadehDevlab]

Hi,

I implement "ButterKnife.bind(this, view!!)" in "onViewStateRestored" method in BaseFragment. But extended Fragment buttons are still null. Why?

[bios90]

Found a Solution for binding views in child Activities from BaseActivity

put this custom setContentView in BaseActivity

```
public void customSetContentView(int res_id, AppCompatActivity activity)
{
super.setContentView(res_id);
ButterKnife.bind(activity);
}

And now call this `customSetContentView` instead of default ` setContentView`  method from any BaseActivity child, the only difference is that you have to pass child activity as a parameter BaseActivity customSetContetnView method.

@BindView(R.id.tv_test)
TextView tv_test;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    customSetContentView(R.layout.activity_main, this);
    tv_test.setText("It ok, i'am binded");
}

```