为什么我在 Android Studio 3.0 中遇到 'com.jakewharton:butterknife:7.0.1' 的问题？

Question

我在运行“应用”（Android Studio 模拟器）时遇到以下问题：

Error:Execution failed for task ':app:javaPreCompileDebug'.
> Annotation processors must be explicitly declared now.  The following dependencies on the compile classpath are found to contain annotation processor.  Please add them to the annotationProcessor configuration.
    - butterknife-7.0.1.jar (com.jakewharton:butterknife:7.0.1)
  Alternatively, set android.defaultConfig.javaCompileOptions.annotationProcessorOptions.includeCompileClasspath = true to continue with previous behavior.  Note that this option is deprecated and will be removed in the future.
  See https://developer.android.com/r/tools/annotation-processor-error-message.html for more details.

我的 Gradle 应用级别：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion '26.0.2'

    defaultConfig {
        applicationId "com.hhhhh.android"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {

    implementation 'com.google.firebase:firebase-database:11.0.4'
    implementation 'com.google.firebase:firebase-auth:11.0.4'
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:25.2.0'
    compile 'com.android.support:design:25.0.1'
    compile 'com.jakewharton:butterknife:7.0.1'

}

apply plugin: 'com.google.gms.google-services'

---

切换到版本后错误消失：

compile 'com.jakewharton:butterknife:8.7.0'

但它会在我的 LogginActivity 中产生更多问题：

package com.sourcey.materiallogindemo;

import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import android.content.Intent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import butterknife.ButterKnife;
import butterknife.Bind;

public class LoginActivity extends AppCompatActivity {
    private static final String TAG = "LoginActivity";
    private static final int REQUEST_SIGNUP = 0;

    @Bind(R.id.input_email) EditText _emailText;
    @Bind(R.id.input_password) EditText _passwordText;
    @Bind(R.id.btn_login) Button _loginButton;
    @Bind(R.id.link_signup) TextView _signupLink;

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

        _loginButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                login();
            }
        });

        _signupLink.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // Start the Signup activity
                Intent intent = new Intent(getApplicationContext(), SignupActivity.class);
                startActivityForResult(intent, REQUEST_SIGNUP);
                finish();
                overridePendingTransition(R.anim.push_left_in, R.anim.push_left_out);
            }
        });
    }

    public void login() {
        Log.d(TAG, "Login");

        if (!validate()) {
            onLoginFailed();
            return;
        }

        _loginButton.setEnabled(false);

        final ProgressDialog progressDialog = new ProgressDialog(LoginActivity.this,
                R.style.AppTheme_Dark_Dialog);
        progressDialog.setIndeterminate(true);
        progressDialog.setMessage("Authenticating...");
        progressDialog.show();

        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();

        // TODO: Implement your own authentication logic here.

        new android.os.Handler().postDelayed(
                new Runnable() {
                    public void run() {
                        // On complete call either onLoginSuccess or onLoginFailed
                        onLoginSuccess();
                        // onLoginFailed();
                        progressDialog.dismiss();
                    }
                }, 3000);
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_SIGNUP) {
            if (resultCode == RESULT_OK) {

                // TODO: Implement successful signup logic here
                // By default we just finish the Activity and log them in automatically
                this.finish();
            }
        }
    }

    @Override
    public void onBackPressed() {
        // Disable going back to the MainActivity
        moveTaskToBack(true);
    }

    public void onLoginSuccess() {
        _loginButton.setEnabled(true);
        finish();
    }

    public void onLoginFailed() {
        Toast.makeText(getBaseContext(), "Login failed", Toast.LENGTH_LONG).show();

        _loginButton.setEnabled(true);
    }

    public boolean validate() {
        boolean valid = true;

        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();

        if (email.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            _emailText.setError("enter a valid email address");
            valid = false;
        } else {
            _emailText.setError(null);
        }

        if (password.isEmpty() || password.length() < 4 || password.length() > 10) {
            _passwordText.setError("between 4 and 10 alphanumeric characters");
            valid = false;
        } else {
            _passwordText.setError(null);
        }

        return valid;
    }
}

使用 8.7.0：

Answer 1

现在必须显式声明注释处理器

照他说的做

添加第二行

compile 'com.jakewharton:butterknife:8.7.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'

使用 8.7.0 ...它会在我的 LogginActivity 中产生更多问题：

您正在导入错误的类...

使用@BindView 注释字段

That changed at Version 8.0

查看网站以了解使用情况和最新版本。 http://jakewharton.github.io/butterknife/

import butterknife.BindView;

..

@BindView(R.id...)

Answer 2

您只需将其添加到您的应用级 gradle 文件即可解决此问题

android{
....
    defaultConfig{
....
    javaCompileOptions {
        annotationProcessorOptions {
            includeCompileClasspath true
        }
    }
}

希望成功

Answer 3

只需添加这一行：

annotationProcessor 'com.jakewharton:butterknife-compiler:7.0.1'

在您的依赖项中，例如：

dependencies {
    //...
    compile 'com.jakewharton:butterknife:7.0.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:7.0.1'
}

查看this 了解更多详情。

Answer 4

你可以试试：

// butter knife
compile 'com.jakewharton:butterknife:8.8.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

否则你可以试试

https://github.com/avast/android-butterknife-zelezny

从黄油刀自动生成代码。

希望对你的问题有帮助！

Answer 5

试试这个，你需要在 ButterKnife 库中添加注解..

黄油刀库

 compile 'com.jakewharton:butterknife:8.8.1'

butterknife 的注释

annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'