Android Butterknife使用方法总结

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/butterknifeButterKnife 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项目的project 的build.gradle 文件中的dependencies标签下添加。classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'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.gradle 文件中添加apply plugin: 'android-apt'在module的build.gradle 文件中的dependencies标签中添加compile 'com.jakewharton:butterknife:8.4.0'apt 'com.jakewharton:butterknife-compiler:8.4.0'例如apply plugin: 'com.android.application'apply plugin: 'android-apt'android {    compileSdkVersion 24    buildToolsVersion "24.0.3"    defaultConfig {        applicationId "com.example.franksight"        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.example.franksight;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.example.franksight.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.example.franksight;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.example.franksight;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.example.franksight;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">城市列表</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.example.franksight;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.example.franksight;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.example.franksight;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.example.franksight;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

插件的使用

安装完成插件后，会提示重启AS，重启完后，可以写一个布局并且新建一个代码类测试下。测试的过程中要注意的是，需要将光标移到setContentView(R.layout.acty_login)，将光标放到R.layout.acty_login，然后右键Generate就有了。要注意一定要将光标放在R.layout.acty_login上面。