Butter Knife学习总结

官网：http://jakewharton.github.io/butterknife/

1.NON-ACTIVITY BINDING

You can also perform binding on arbitrary objects by supplying your own view root.

 1 class ExampleActivity extends Activity {
 2   @BindView(R.id.title) TextView title;
 3   @BindView(R.id.subtitle) TextView subtitle;
 4   @BindView(R.id.footer) TextView footer;
 5 
 6   @Override public void onCreate(Bundle savedInstanceState) {
 7     super.onCreate(savedInstanceState);
 8     setContentView(R.layout.simple_activity);
 9     ButterKnife.bind(this);
10     // TODO Use fields...
11   }
12 }

2.NON-ACTIVITY BINDING

You can also perform binding on arbitrary objects by supplying your own view root.

Bind pre-defined resources with @BindBool, @BindColor, @BindDimen, @BindDrawable,@BindInt, @BindString, which binds an R.bool ID (or your specified type) to its corresponding field.

1 class ExampleActivity extends Activity {
2   @BindString(R.string.title) String title;
3   @BindDrawable(R.drawable.graphic) Drawable graphic;
4   @BindColor(R.color.red) int red; // int or ColorStateList field
5   @BindDimen(R.dimen.spacer) Float spacer; // int (for pixel size) or float (for exact value) field
6   // ...
7 }

3.NON-ACTIVITY BINDING

You can also perform binding on arbitrary objects by supplying your own view root.

 1 public class FancyFragment extends Fragment {
 2   @BindView(R.id.button1) Button button1;
 3   @BindView(R.id.button2) Button button2;
 4 
 5   @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 6     View view = inflater.inflate(R.layout.fancy_fragment, container, false);
 7     ButterKnife.bind(this, view);
 8     // TODO Use fields...
 9     return view;
10   }
11 }

4.Another use is simplifying the view holder pattern inside of a list adapter.

 1 public class MyAdapter extends BaseAdapter {
 2   @Override public View getView(int position, View view, ViewGroup parent) {
 3     ViewHolder holder;
 4     if (view != null) {
 5       holder = (ViewHolder) view.getTag();
 6     } else {
 7       view = inflater.inflate(R.layout.whatever, parent, false);
 8       holder = new ViewHolder(view);
 9       view.setTag(holder);
10     }
11 
12     holder.name.setText("John Doe");
13     // etc...
14 
15     return view;
16   }
17 
18   static class ViewHolder {
19     @BindView(R.id.title) TextView name;
20     @BindView(R.id.job_title) TextView jobTitle;
21 
22     public ViewHolder(View view) {
23       ButterKnife.bind(this, view);
24     }
25   }
26 }