标签：fragments group state ids 事件处理 factory att protected markdown
平时，我们的那一系列findById是一个“浩大的project”样比例如以下
这是以前一个项目的一个填童虎数据表单的一个Activity，这是一系列的声明
public class UserInfoActivity extends Activity implements OnClickListener {
TextView userNameTxt;
RelativeLayout sexLayout;
TextView sexTxt;
RelativeLayout birthdayLayout;
TextView birthdayTxt;
RelativeLayout provinceLayout;
TextView provinceTxt;
RelativeLayout cityLayout;
TextView cityTxt;
RelativeLayout hasCarCardLayout;
TextView hasCarCardTxt;
RelativeLayout hasCarLayout;
TextView hasCarTxt;
RelativeLayout buyCarTimeLayout;
TextView buyCarTimeTxt;
RelativeLayout carBrandLayout;
TextView carBrandTxt;
RelativeLayout carTypeLayout;
TextView carTypeTxt;
RelativeLayout carPriceLayout;
TextView carPriceTxt;
RelativeLayout carCardNumLayout;
TextView carCardNumTxt;
RelativeLayout carNumLayout;
TextView carNumTxt;
RelativeLayout familyIncomeLayout;
TextView familyIncomeTxt;
RelativeLayout carCarImgLayout;
ImageView carCarImg;
RelativeLayout drivingLicenseLayout;
ImageView drivingLicenseImg;
LinearLayout backLin;
LinearLayout saveBtn;
RelativeLayout userNameLayout;
LinearLayout sexLinLayout;
LinearLayout birthdayLinLayout;
LinearLayout provinceLinLayout;
LinearLayout cityLinLayout;
LinearLayout carCarLinLayout;
LinearLayout hasCarLinLayout;
LinearLayout buyCarTimeLinLayout;
LinearLayout carBrandLinLayout;
LinearLayout carTypeLinLayout;
LinearLayout carPriceLinLayout;
LinearLayout carCardNumLinLayout;
LinearLayout carNumLinLayout;
LinearLayout familiIncomeLinLayout;
LinearLayout carCardImageLinLayout;
LinearLayout drivindLicenseLinLayout;
LinearLayout professionLinLayout;
LinearLayout carInfoLayout;
TextView professionTv;这是一大堆的findById
backLin = (LinearLayout) titleView.findViewById(R.id.backLin);
saveBtn = (LinearLayout) titleView.findViewById(R.id.saveBtn);
userNameLayout = (RelativeLayout) contentView
.findViewById(R.id.userNameLayout);
userNameTxt = (TextView) contentView.findViewById(R.id.userNameTxt);
sexLayout = (RelativeLayout) contentView.findViewById(R.id.sexLayout);
sexTxt = (TextView) contentView.findViewById(R.id.sexTxt);
birthdayLayout = (RelativeLayout) contentView
.findViewById(R.id.birthdayLayout);
birthdayTxt = (TextView) contentView.findViewById(R.id.birthdayTxt);
provinceLayout = (RelativeLayout) contentView
.findViewById(R.id.provinceLayout);
provinceTxt = (TextView) contentView.findViewById(R.id.provinceTxt);
cityLayout = (RelativeLayout) contentView.findViewById(R.id.cityLayout);
cityTxt = (TextView) contentView.findViewById(R.id.cityTxt);
hasCarCardLayout = (RelativeLayout) contentView
.findViewById(R.id.carCardLayout);
hasCarCardTxt = (TextView) contentView.findViewById(R.id.carCardTxt);
hasCarLayout = (RelativeLayout) contentView
.findViewById(R.id.hasCarLayout);
hasCarTxt = (TextView) contentView.findViewById(R.id.hasCarTxt);
buyCarTimeLayout = (RelativeLayout) contentView
.findViewById(R.id.buyCarTimeLayout);
buyCarTimeTxt = (TextView) contentView.findViewById(R.id.buyCarTimeTxt);
carBrandLayout = (RelativeLayout) contentView
.findViewById(R.id.carBrandLayout);
carBrandTxt = (TextView) contentView.findViewById(R.id.carBrandTxt);
carTypeLayout = (RelativeLayout) contentView
.findViewById(R.id.carTypeLayout);
carTypeTxt = (TextView) contentView.findViewById(R.id.carTypeTxt);
carPriceLayout = (RelativeLayout) contentView
.findViewById(R.id.carPriceLayout);
carPriceTxt = (TextView) contentView.findViewById(R.id.carPriceTxt);
carCardNumLayout = (RelativeLayout) contentView
.findViewById(R.id.carCardNumLayout);
carCardNumTxt = (TextView) contentView.findViewById(R.id.carCardNumTxt);
carNumLayout = (RelativeLayout) contentView
.findViewById(R.id.carNumLayout);
carNumTxt = (TextView) contentView.findViewById(R.id.carNumTxt);
familyIncomeLayout = (RelativeLayout) contentView
.findViewById(R.id.familyIncomeLayout);
familyIncomeTxt = (TextView) contentView
.findViewById(R.id.familyIncomeTxt);
carCarImgLayout = (RelativeLayout) contentView
.findViewById(R.id.carCarImgLayout);
carCarImg = (ImageView) contentView.findViewById(R.id.carCarImg);
drivingLicenseLayout = (RelativeLayout) contentView
.findViewById(R.id.drivingLicenseLayout);
drivingLicenseImg = (ImageView) contentView
.findViewById(R.id.drivingLicenseImg);
sexLinLayout = (LinearLayout) contentView
.findViewById(R.id.sexLinLayout);
birthdayLinLayout = (LinearLayout) contentView
.findViewById(R.id.birthdayLinLayout);
provinceLinLayout = (LinearLayout) contentView
.findViewById(R.id.provinceLinLayout);
cityLinLayout = (LinearLayout) contentView
.findViewById(R.id.cityLinLayout);
carCarLinLayout = (LinearLayout) contentView
.findViewById(R.id.carCarLinLayout);
hasCarLinLayout = (LinearLayout) contentView
.findViewById(R.id.hasCarLinLayout);
buyCarTimeLinLayout = (LinearLayout) contentView
.findViewById(R.id.buyCarTimeLinLayout);
carBrandLinLayout = (LinearLayout) contentView
.findViewById(R.id.carBrandLinLayout);
carTypeLinLayout = (LinearLayout) contentView
.findViewById(R.id.carTypeLinLayout);
carPriceLinLayout = (LinearLayout) contentView
.findViewById(R.id.carPriceLinLayout);
carCardNumLinLayout = (LinearLayout) contentView
.findViewById(R.id.carCardNumLinLayout);
carNumLinLayout = (LinearLayout) contentView
.findViewById(R.id.carNumLinLayout);
familiIncomeLinLayout = (LinearLayout) contentView
.findViewById(R.id.familiIncomeLinLayout);
drivindLicenseLinLayout = (LinearLayout) contentView
.findViewById(R.id.drivindLicenseLinLayout);
carCardImageLinLayout = (LinearLayout) contentView
.findViewById(R.id.carCardImageLinLayout);
professionLinLayout = (LinearLayout) contentView
.findViewById(R.id.professionLinLayout);
carInfoLayout = (LinearLayout) contentView
.findViewById(R.id.carInfoLayout);
professionTv = (TextView) contentView.findViewById(R.id.professionTv);看着看着蛋都碎了，简直不能忍。所以今天推荐一个简单易用的库，效果如图
不试试非常快非常猛？轻轻点两下，这一大堆玩意都能解决！
来来来，JAR包下载：butterknife-7.0.1
Maven:
<groupId>com.jakewharton</groupId>
<artifactId>butterknife</artifactId>
<version>7.0.1</version>
</dependency>Gradle:
compile ‘com.jakewharton:butterknife:7.0.1‘项目包下载地址：点击下载
Gif的功能仅仅能在AndroidStudio使用，Eclipse的小伙伴仅仅能手打了。。
操作方法：
Android Studio: go to Preferences → Plugins → Browse repositories and search for ButterKnife Zelezny
跟我们用图片做背景图一样，下载一个插件就好。
好。废话不多，開始拆作者的例子（楼主小学英文大致的理解讲述下）：
Annotate fields with @Bind and a view ID for Butter Knife to find and automatically cast the corresponding view in your layout.
凝视字段“绑定”和“ Butter Knife”的视图标识。并自己主动在布局中查看对应的视图。
class ExampleActivity extends Activity {
@Bind(R.id.title) TextView title;
@Bind(R.id.subtitle) TextView subtitle;
@Bind(R.id.footer) TextView footer;
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.simple_activity);
ButterKnife.bind(this);
// TODO Use fields...
}
}分析：使用 @Bind 就能够对控件进行声明，已经findViewById的操作，然后在onCreate（）方法中调用 ButterKnife.bind(this);使之生效，假设你认为有必要的话能够在onDestory()方法中再调用ButterKnife.unbind(this);进行解绑操作
You can also perform binding on arbitrary objects by supplying your own view root.
能够通过提供您自己的视图根试图来运行随意对象的绑定。我们能够用在fragment等用到inflater的地方。
public class FancyFragment extends Fragment {
@Bind(R.id.button1) Button button1;
@Bind(R.id.button2) Button button2;
@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fancy_fragment, container, false);
ButterKnife.bind(this, view);
// TODO Use fields...
return view;
}
}分析：这边与Activity的区别仅仅是在调用的方法中须要传入被绑定的那个根试图而已。
Another use is simplifying the view holder pattern inside of a list adapter.
在ListView或者其它一些用到 ViewHolder形式的地方都能够用
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 {
@Bind(R.id.title) TextView name;
@Bind(R.id.job_title) TextView jobTitle;
public ViewHolder(View view) {
ButterKnife.bind(this, view);
}
}
}You can group multiple views into a List or array
能够把一些控件放进一个集合或者数组中
@Bind({ R.id.first_name, R.id.middle_name, R.id.last_name })
List<EditText> nameViews;Listeners can also automatically be configured onto methods.
也能够自己主动将侦听器配置为方法。
@OnClick(R.id.submit)
public void submit(View view) {
// TODO submit data to server...
}All arguments to the listener method are optional.
全部參数的侦听器方法是可选的。
@OnClick(R.id.submit)
public void submit() {
// TODO submit data to server...
}Define a specific type and it will automatically be cast.
定义一个特定类型，它将自己主动被转换。
@OnClick(R.id.submit)
public void sayHi(Button button) {
button.setText("Hello!");
}Specify multiple IDs in a single binding for common event handling.
指定多个身ID在一个单一的绑定事件处理。
@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();
}
}自己也写了一个Demo大致内容也和范例差点儿相同。只是比較直观，能够看一下
MainActivity
public class MainActivity extends AppCompatActivity implements TestFragment.OnFragmentInteractionListener{
@Bind(R.id.textView)
TextView textview;
@Bind(R.id.button1)
Button button1;
@Bind(R.id.button2)
Button button2;
@Bind(R.id.button3)
Button button3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@OnClick(R.id.button1)
public void button1click(Button btn){
btn.setText("BTN1");
}
@OnClick({R.id.button1, R.id.button2, R.id.button3 })
public void click(View v) {
switch (v.getId()){
case R.id.button1:
Toast.makeText(this, "button1", Toast.LENGTH_SHORT).show();
break;
case R.id.button2:
Toast.makeText(this, "button2",Toast.LENGTH_SHORT).show();
break;
case R.id.button3:
Toast.makeText(this, "button3",Toast.LENGTH_SHORT).show();
break;
}
}
@Override
public void onFragmentInteraction(Uri uri) {
}
}
内部的fragment
public class TestFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
@Bind(R.id.fbtn)
Button fbtn;
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment TestFragment.
*/
// TODO: Rename and change types and number of parameters
public static TestFragment newInstance(String param1, String param2) {
TestFragment fragment = new TestFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
public TestFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_test, container, false);
ButterKnife.bind(this, view);
return view;
}
@Override
public void onDestroyView() {
super.onDestroyView();
ButterKnife.unbind(this);
}
@OnClick(R.id.fbtn)
void fbtnClick() {
Toast.makeText(getActivity(), "Fragment", Toast.LENGTH_SHORT).show();
fbtn.setText("呵呵哒");
getView().setBackgroundColor(Color.RED);
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mListener = (OnFragmentInteractionListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p/>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
public void onFragmentInteraction(Uri uri);
}
}
主Activity的布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="button1"
android:id="@+id/button1"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="button2"
android:id="@+id/button2"
android:layout_below="@+id/button1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="button3"
android:id="@+id/button3"
android:layout_below="@+id/button2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<fragment
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:name="test.butterknife.com.testdemo.TestFragment"
android:id="@+id/fragment"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_below="@+id/button3"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true" />
</RelativeLayout>
有意參与一些开源项目。easy上手的Team能够找我聊聊。看看能够造福社会不。哈哈哈
安卓开发懒鬼最爱之ButterKnife，依赖注入第三方是库，进一步加速开发速度
标签：fragments group state ids 事件处理 factory att protected markdown
原文地址：http://www.cnblogs.com/cxchanpin/p/7204028.html
