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ButterKnife 简介
ButterKnife是一个专注于Android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:
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
在项目的project 的build.gredle 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.gredle 文件中添加
apply plugin: ‘android-apt’
在module的build.gredle 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.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'}
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 "); }}
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
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 ; }}
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 ); }}
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] ); }} WiFi管家 - 厦门市
- 福州市
- 泉州市
- 漳州市
- 龙岩市
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 ); }}
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 ); }}
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 ) ; }}
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。
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。