ButterKnife

ButterKnife

GitHub

https://github.com/JakeWharton/butterknife

1. 介绍

ButterKnife是一个专注于Android系统的View注入框架,以前总是要写很多findViewById来找到View对象，有了ButterKnife可以很轻松的省去这些步骤。

ButterKnife的优势：
1、强大的View绑定和Click事件处理功能，简化代码，提升开发效率
2、方便的处理Adapter里的ViewHolder绑定问题
3、运行时不会影响APP效率，使用配置方便
4、代码清晰，可读性强

2. 添加依赖

android {...// Butterknife requires Java 8.compileOptions {sourceCompatibility JavaVersion.VERSION_1_8targetCompatibility JavaVersion.VERSION_1_8}
}dependencies {implementation 'com.jakewharton:butterknife:10.2.1'annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1'
}

If you are using Kotlin, replace annotationProcessor with kapt.

如果你使用kotlin，将annotationProcessor 代替 kapt

Snapshots of the development version are available in Sonatype’s snapshots repository.

3. 如何使用

• 插件：Android ButterKnife Zelezny
• 使用：获取控件、事件点击处理

Activity使用：

    public class MainActivity extends AppCompatActivity {//获取控件@BindView(R.id.name)EditText name;@BindView(R.id.btn)Button btn;@BindView(R.id.txt)TextView txt;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//绑定处理ButterKnife.bind(this);}//按钮点击事件处理@OnClick(R.id.btn)public void onViewClicked() {if (TextUtils.isEmpty(name.getText().toString().trim())){return;}if (name.getText().toString().trim().length() < 6){return;}txt.setText(name.getText());}}

多个按钮点击事件处理方式如下：

@OnClick({R.id.imgv_base_title_back_id})
public void onViewClicked(View view) {switch (view.getId()) {case R.id.imgv_base_title_back_id:finish();break;}
}

Fragment使用：

    public class BlankFragment extends Fragment {@BindView(R.id.txt)TextView txt;@BindView(R.id.btn)Button btn;Unbinder unbinder;@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// Inflate the layout for this fragmentView inflate = inflater.inflate(R.layout.fragment_blank, container, false);unbinder = ButterKnife.bind(this, inflate);return inflate;}@Overridepublic void onDestroyView() {super.onDestroyView();unbinder.unbind();}@OnClick(R.id.btn)public void onViewClicked() {}}