android eclipse 没有Annotation Processin ButterKnife在Eclipse的配置
因为要使用开源 androidannotations 注解,发现eclipse没有Annotation Processin
解决办法:
需要配置插件:http://download.eclipse.org/releases/juno
Annotation Processin
http://blog.csdn.net/vurtne_ye/article/details/38850529
工程中添加butterknife.jar后, 在执行代码时,发现注解不成功.
查阅相关文档后, 发现需要在eclipse中对butterknife进行相关的配置.
再次运行后,成功解决问题.
记录配置流程如下:
配置流程
Java代码 收藏代码
工程项目
-> 右键
-> 选择 properties
-> 选中 java Complier
-> 选中 Annotation Processing
-> 勾选 Enable project specific settings (勾选后,其他选项自动被勾选)
-> 选中 Factory Path
-> 勾选 Enable project specific settings
-> 点击 Add JARs
-> 添加 butterknife.jar
butterknife
让我们从繁琐的 findViewById
中解救出来。下面直接是使用方法
Activity
class ExampleActivity extends Activity {
@InjectView(R.id.title) TextView title;
@InjectView(R.id.subtitle) TextView subtitle;
@InjectView(R.id.footer) TextView footer;
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.simple_activity);
ButterKnife.inject(this);
// TODO Use "injected" views...
}
}
Fragment 销毁的时候掉用 ButterKnife . reset ( this );
public class FancyFragment extends Fragment {
@InjectView(R.id.button1) Button button1;
@InjectView(R.id.button2) Button button2;
@Override View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fancy_fragment, container, false);
ButterKnife.inject(this, view);
// TODO Use "injected" views...
return view;
}
}
adapter
public class MyAdapter extends BaseAdapter {
@Override
public View getView(int position, View view, ViewGroup parent) {
ViewHolder holder;
if (view != null) {
holder = (ViewHolder) view.getTag();
} else {
view = inflater.inflate(R.layout.whatever, parent, false);
holder = new ViewHolder(view);
view.setTag(holder);
}
holder.name.setText("John Doe");
// etc...
return view;
}
static class ViewHolder {
@InjectView(R.id.title) TextView name;
@InjectView(R.id.job_title) TextView jobTitle;
public ViewHolder(View view) {
ButterKnife.inject(this, view);
}
}
}
VIEW LISTS
@InjectViews({ R.id.first_name, R.id.middle_name, R.id.last_name }) List<EditText> nameViews;
CLICK LISTENER INJECTION
@OnClick(R.id.submit)
public void submit() {
// TODO submit data to server...
}
@OnClick(R.id.submit)
public void sayHi(Button button) {
button.setText("Hello!");
}
还可以绑定多控件id@OnClick({ R.id.door1, R.id.door2, R.id.door3 })
public void pickDoor(DoorView door) {
if (door.hasPrizeBehind()) {
Toast.makeText(this, "You win!", LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Try again", LENGTH_SHORT).show();
}
}
INJECTION RESET 销毁
ButterKnife.reset(this);
默认情况下 @InjectView
and @OnClick
找到控件都是不允许为空的,否则会抛异常。
可以添加@Optional
允许为空
@Optional @InjectView(R.id.might_not_be_there) TextView mightNotBeThere;
@Optional @OnClick(R.id.maybe_missing) void onMaybeMissingClicked() {
// TODO ...
}
http://www.tuicool.com/articles/VRruAfA
http://www.it165.net/pro/html/201404/12375.html
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