Android Butterknife view注入框架使用

前言
ButterKnife 简介

ButterKnife是一个专注于Android系统的View注入框架,可以减少大量的findViewById以及setOnClickListener代码，可视化一键生成。

项目github地址：

https://github.com/JakeWharton/butterknife

ButterKnife 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

如何添加依赖

在module的build.gredle 文件中的dependencies标签中添加

compile 'com.jakewharton:butterknife:8.4.0'

如何使用
控件id 注解： @BindView（）

package com.zyj.wifi;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Button;import butterknife.BindView;import butterknife.ButterKnife;public class ButterknifeActivity extends AppCompatActivity {    @BindView( R.id.button1 )    public Button button1 ;    // 注意：button 的修饰类型不能是：private 或者 static 。 否则会报错：错误: @BindView fields must not be private or static. (com.zyj.wifi.ButterknifeActivity.button1)    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_butterknife);        //绑定activity        ButterKnife.bind( this ) ;        button1.setText( "I am a button ");    }}

多个控件id 注解： @BindViews（）

package com.zyj.wifi;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Button;import java.util.List;import butterknife.BindViews;import butterknife.ButterKnife;public class Main2Activity extends AppCompatActivity {    @BindViews({ R.id.button1  , R.id.button2 ,  R.id.button3 })    public List<Button> buttonList ;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);        ButterKnife.bind(this);        buttonList.get( 0 ).setText( "hello 1 ");        buttonList.get( 1 ).setText( "hello 2 ");        buttonList.get( 2 ).setText( "hello 3 ");    }}

fragment 使用

package com.zyj.wifi;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.Button;import butterknife.BindView;import butterknife.ButterKnife;public class ButterknifeFragment extends Fragment {    @BindView( R.id.button1 )    public Button button1 ;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.fragment_butterknife, container, false);        //绑定fragment        ButterKnife.bind( this , view ) ;        button1.setText( "I am a button ");        return view ;    }}

@BindString() ：绑定string 字符串

package com.zyj.wifi;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.Button;import butterknife.BindString;import butterknife.BindView;import butterknife.ButterKnife;public class ButterknifeActivity extends AppCompatActivity {    @BindView( R.id.button1 ) //绑定button 控件    public Button button1 ;    @BindString( R.string.app_name )  //绑定string 字符串    String meg;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_butterknife);        //绑定activity        ButterKnife.bind( this ) ;        button1.setText( meg );    }}

@BindArray() : 绑定string里面array数组

<resources>    <string name="app_name">WiFi管家</string>    <string-array name="city">        <item>厦门市</item>        <item>福州市</item>        <item>泉州市</item>        <item>漳州市</item>        <item>龙岩市</item>    </string-array></resources>

package com.zyj.wifi;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.Button;import butterknife.BindArray;import butterknife.BindView;import butterknife.ButterKnife;public class ButterknifeActivity extends AppCompatActivity {    @BindView( R.id.button1 ) //绑定button 控件    public Button button1 ;    @BindArray(R.array.city )  //绑定string里面array数组    String [] citys ;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_butterknife);        //绑定activity        ButterKnife.bind( this ) ;        button1.setText( citys[0] );    }}

@BindBitmap( ) : 绑定Bitmap 资源

package com.zyj.wifi;import android.graphics.Bitmap;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.ImageView;import butterknife.BindBitmap;import butterknife.BindView;import butterknife.ButterKnife;public class ButterknifeActivity extends AppCompatActivity {    @BindView( R.id.imageView ) //绑定ImageView 控件    public ImageView imageView ;    @BindBitmap( R.mipmap.wifi )  //绑定Bitmap 资源    public Bitmap wifi_bitmap ;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_butterknife);        //绑定activity        ButterKnife.bind( this ) ;        imageView.setImageBitmap( wifi_bitmap );    }}

@BindColor( ) : 绑定一个颜色值

package com.zyj.wifi;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.Button;import butterknife.BindColor;import butterknife.BindView;import butterknife.ButterKnife;public class ButterknifeActivity extends AppCompatActivity {    @BindView( R.id.button1 )  //绑定一个控件    public Button button1 ;    @BindColor( R.color.colorAccent ) int black ;  //绑定一个颜色值    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_butterknife);        //绑定activity        ButterKnife.bind( this ) ;        button1.setTextColor(  black );    }}

@OnClick( ) : 绑定控件点击事件
@OnLongClick( ) ： 绑定控件长按事件

package com.zyj.wifi;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.Toast;import butterknife.ButterKnife;import butterknife.OnClick;import butterknife.OnLongClick;public class ButterknifeActivity extends AppCompatActivity {    @OnClick(R.id.button1 )   //给 button1 设置一个点击事件    public void showToast(){        Toast.makeText(this, "is a click", Toast.LENGTH_SHORT).show();    }    @OnLongClick( R.id.button1 )    //给 button1 设置一个长按事件    public boolean showToast2(){        Toast.makeText(this, "is a long click", Toast.LENGTH_SHORT).show();        return true  ;    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_butterknife);        //绑定activity        ButterKnife.bind( this ) ;    }}

zelezny : Butterknife插件的使用
可以在Androidstudio中安装zelezny插件可视化view注入。