导语
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。由大神JakeWharton开源。ButterKnife 地址
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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'
}
ButterKnife 加库
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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 ) ;
}
}
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安装zelezny插件
ButterKnife Zelezny 安装
ButterKnife Zelezny 绑定范例
