Java ButterKnife onclick 不起作用

ButterKnife onclick is not working

提问by malli

I injected views perfectly using butterknife library. But when I try to implement listeners, for example onclickI'm not able to implement them. Following java code will help you to understand my problem.

我使用黄油刀库完美地注入了视图。但是当我尝试实现侦听器时，例如onclick我无法实现它们。以下java代码将帮助您了解我的问题。

Java code:

爪哇代码：

public class LoginActivity extends ActionBarActivity{
    @InjectView(R.id.toolbar) Toolbar toolbar;
    @InjectView(R.id.btn_login) Button login;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
        ButterKnife.inject(this);

        initialize();
        //initListeners();

        @OnClick(R.id.btn_login)
        public void submit(View view) {
          // TODO submit data to server...
        }
    }

    /*private void initListeners() {
        @OnClick(R.id.btn_login)
        public void login(){

        }
    }*/

    private void initialize() {
        setSupportActionBar(toolbar);
        getSupportActionBar().setIcon(R.drawable.toolbar_icon);
        getSupportActionBar().setTitle(null);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }
}

Tell me why it is happening. Anything wrong in code? I've already configured the IDE which is compatible with ButterKnife by using following URL.

告诉我为什么会这样。代码有什么问题吗？我已经使用以下 URL 配置了与 ButterKnife 兼容的 IDE。

http://stackoverflow.com/questions/27754811/onclick-is-not-working-in-implementation-of-butterknife-library

http://stackoverflow.com/questions/27754811/onclick-is-not-working-in-implementation-of-butterknife-library

Please give me any suggestions regarding this issue. Thanks in Advance..

请就这个问题给我任何建议。提前致谢..

采纳答案by vinay Maneti

MainActivity.java

主活动.java

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import butterknife.ButterKnife;
import butterknife.InjectView;
import butterknife.OnClick;


public class MainActivity extends ActionBarActivity {


    @InjectView(R.id.button)
    Button login;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.inject(this);


    }


    @OnClick(R.id.button)
    void submitButton(View view) {
            Toast.makeText(this, "Click", Toast.LENGTH_SHORT).show();
    }
}

and the activity_main.xml part

和 activity_main.xml 部分

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">


    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginLeft="59dp"
        android:layout_marginStart="59dp"
        android:layout_marginTop="132dp"
        />
</RelativeLayout>

in build.gradle file(app)

在 build.gradle 文件（应用程序）

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.0.0'
    compile 'com.jakewharton:butterknife:6.1.0'
}

回答by Moonbloom

You have to move your @OnClickout of the onCreatemethod, as i did below in the code snippet.

你必须把你@OnClick的onCreate方法移出，就像我在下面的代码片段中所做的那样。

The code i posted below should work as it's supposed to (I also use ButterKnife).

我在下面发布的代码应该可以正常工作（我也使用ButterKnife）。

public class LoginActivity extends ActionBarActivity{
    @InjectView(R.id.toolbar) Toolbar toolbar;
    @InjectView(R.id.btn_login) Button login;

    @OnClick(R.id.btn_login)
    public void submit(View view) {
       // TODO submit data to server...
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
        ButterKnife.inject(this);

        initialize();
    }

    private void initialize() {
        setSupportActionBar(toolbar);
        getSupportActionBar().setIcon(R.drawable.toolbar_icon);
        getSupportActionBar().setTitle(null);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }
}

回答by David Hackro

In my case this is my solution

就我而言，这是我的解决方案

add classpathin gradle(Project)

在gradle（项目）中添加类路径

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
    }
}

and gradle(Module) add applyand apt

和 gradle( Module) 添加apply和apt

apply plugin: 'com.neenbedankt.android-apt'
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'   
    compile 'com.jakewharton:butterknife:8.2.1'
    apt 'com.jakewharton:butterknife-compiler:8.2.1'
}

file java

文件 java

@OnClick(R.id.btn_login)
public void submit(View view) {
  // TODO submit data to server...
}

回答by Zeinab Abdelmawla

make sure you add all required dependencies

确保添加所有必需的依赖项

dependencies {
compile 'com.jakewharton:butterknife:8.4.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'
}

回答by Fahry Mohammed

You should've to bind butterKnife before you use the annotations.

在使用注释之前，您应该绑定 butterKnife。

Add these dependencies to gradle.build

将这些依赖添加到 gradle.build

compile 'com.jakewharton:butterknife:8.4.0' annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'

compile 'com.jakewharton:butterknife:8.4.0' annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'

Then add bind to onCreate ButterKnife.bind(this);

然后将绑定添加到 onCreate ButterKnife.bind(this);

Now do the code to Button. The method should be public and in butterKnife, you not required to add the onClick in XML. And method also should be outside of onCreate It'll automatically get button which you assign using the annotation given at above the method,

现在对 Button 执行代码。该方法应该是公共的，并且在 butterKnife 中，您不需要在 XML 中添加 onClick。并且方法也应该在 onCreate 之外它会自动获取您使用方法上方给出的注释分配的按钮，

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ButterKnife.bind(this);

}
@OnClick(R.id.btn_login)
public void submit(View view){ 

   //Do your code here. 

}