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 Listfragment 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。