Auto create view instance in activity and fragment, with the annotation @FindView.

First of all, you must comply with the ViewNamingRule.

The layout file name of XxxActivity must be activity_xxx.xml. Likewise, XxxXxxxActivity -> activity_xxx_xxxx.xml, XxxFragment -> fragment_xxx.xml.

View ids in layout must comply with the ViewNamingRule equally.

You need to create a xml file(view_naming_rule.xml) in directory assets. Some content of this file:

<containers>
	<container name="Activity" />
	<container name="Fragment" />
</containers>
<views>
	<view name="TextView" abbrev="tv" />
	<view name="Button" abbrev="btn" />
	<view name="EditText" abbrev="edt" />
 </views>

Well, view id in layout must be named in format abbrev_pagename_logicname.

There is a Button(text:'login') in LoginActivity, its id in layout should be 'btn_login_login', and its variable name should be loginButton. A TextView(used for showing username) in MainActivity, its id in layout should be 'tv_main_username', and its variable name should be usernameTextView. More examples in the demo.

The annotaion that annotates view fields in an activity or a fragment.

public class MainActivity extends BaseActivity {  
    @FindView  
    private TextView textView;  
}  

With the annotation @FindView, you don't need to use findViewById at all.

To use @FindView correctly, you should use the annotation @SetLayout first.

The annotaion that annotates activities and fragments.

@SetLayout
public abstract class BaseActivity extends AppCompatActivity {
}

With the annotaton @SetLayout, you don't need to use setContentView at all. And, if you annotate @SetLayout to an activity(e.g. BaseActivity), all the activity that extends BaseActivity would be annotated by @SetLayout automatically. Also, if you don't want some activities to be annotated automatically, you can do it this way:

@SetLayout(false)
public class SomeActivity extends BaseActivity {
}

You should initialize ViewNamingRule in method onCreate() in your Application(extends android.app.Application).

public class MyApplication extends Application{
    @Override
    public void onCreate() {
        super.onCreate();
        ViewNamingRuleInit.getInstance().loadViewNamingRule(this);
    }
}

MIT LICENSE.