Android Butterknife 8.4.0 使用方法总结
转载请标明出处:http://www.cnblogs.com/zhaoyanjun/p/6016341.html
本文出自【赵彦军的博客】
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'
}
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
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。
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。