ButterKnife用法详解

前言

ButterKnife 简介

ButterKnife 优势

如何添加依赖

在项目的project 的build.gredle 文件中的dependencies标签下添加。

例如：

buildscript {

    repositories {

        jcenter()

    }

    dependencies {

        classpath 'com.android.tools.build:gradle:2.2.2'

        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

    }

}

allprojects {

    repositories {

        jcenter()

    }

}

task clean(type: Delete) {

    delete rootProject.buildDir

}

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

例如

apply plugin: 'com.android.application'

apply plugin: 'android-apt'

android {

    compileSdkVersion 24

    buildToolsVersion "24.0.3"

    defaultConfig {

        applicationId "com.zyj.wifi"

        minSdkVersion 14

        targetSdkVersion 24

        versionCode 1

        versionName "1.0"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}

dependencies {

    compile fileTree(dir: 'libs', include: ['*.jar'])

    compile 'com.jakewharton:butterknife:8.4.0'

    apt 'com.jakewharton:butterknife-compiler: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
插件的安装

ButterKnife用法详解-LMLPHP

插件的使用

ButterKnife用法详解-LMLPHP

这里需要注意的是在勾选控件的界面上，有一个CreateViewHolder , 很明显这个是专门为ListView或者RecyclerView的适配器专门提供的。

ButterKnife

ButterKnife用法详解

前言

如何添加依赖

如何使用

插件的安装

插件的使用