使用黄油刀库视图注射

Question

我在做什么 ::

1. 我试图运行黄油刀库对于我的简单项目
2. 我已经按照文档中的所有步骤进行操作,但仍然遇到日志错误
3. 我怎么能解决这个问题,我错过了任何一步
4. 我还在libs文件夹中添加了jar

---

MainActivity.java

package com.example.butterknife;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import butterknife.ButterKnife;
import butterknife.InjectView;

public class MainActivity extends Activity {

    @InjectView(R.id.txtID) TextView title;

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

        ButterKnife.inject(this);
        title.setText("Hello Everyone !!");

    }
}

记录 ::

04-15 11:50:57.845: E/AndroidRuntime(913): FATAL EXCEPTION: main
04-15 11:50:57.845: E/AndroidRuntime(913): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.butterknife/com.example.butterknife.MainActivity}: java.lang.NullPointerException
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.ActivityThread.access$600(ActivityThread.java:122)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.os.Handler.dispatchMessage(Handler.java:99)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.os.Looper.loop(Looper.java:137)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.ActivityThread.main(ActivityThread.java:4340)
04-15 11:50:57.845: E/AndroidRuntime(913):  at java.lang.reflect.Method.invokeNative(Native Method)
04-15 11:50:57.845: E/AndroidRuntime(913):  at java.lang.reflect.Method.invoke(Method.java:511)
04-15 11:50:57.845: E/AndroidRuntime(913):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-15 11:50:57.845: E/AndroidRuntime(913):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-15 11:50:57.845: E/AndroidRuntime(913):  at dalvik.system.NativeStart.main(Native Method)
04-15 11:50:57.845: E/AndroidRuntime(913): Caused by: java.lang.NullPointerException
04-15 11:50:57.845: E/AndroidRuntime(913):  at com.example.butterknife.MainActivity.onCreate(MainActivity.java:19)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.Activity.performCreate(Activity.java:4465)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-15 11:50:57.845: E/AndroidRuntime(913):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
04-15 11:50:57.845: E/AndroidRuntime(913):  ... 11 more
04-15 11:51:06.722: I/Process(913): Sending signal. PID: 913 SIG: 9

Answer 1

按照以下步骤[进入Eclipse IDE]:

1)右键点击你的项目中的Package Explorer.得到Java Compiler- > Annotation Processing并检查Enable project specific settings.

2)展开Annotation Processing部分并选择Factory Path.选中Enable project specific settings然后单击Add JARs导航到项目的libs /文件夹并选择ButterKnifejar.

3)单击Ok以保存新设置.Eclipse会问你要重建你的项目,你应该点击Yes.

注意:确保该.apt_generated/文件夹位于项目根目录中.它应该包含像YOURACTIVITY$$ViewInjector.java.如果这些文件不存在触发一个干净的构建通过选择项目→清洁.此文件夹和文件不应该签入到版本控制.

参考 - > 设置为ButterKnife注释手动配置