IllegalStateException:无法在父级或祖先上下文类 android.support.v7.widget.AppCompatButton 中找到方法 insert(View) [英] IllegalStateException: Could not find method insert(View) in a parent or ancestor Context class android.support.v7.widget.AppCompatButton

问题描述

我已在单个项目中启动了该程序，该程序运行正常.

I have launched the program in single project which work properly.

但是，当我复制并粘贴到一个更大的项目中时，它在 logcat 中出现了以下错误.

However, when I have copied and pasted into a bigger project, it gives me bellow error in logcat.

 FATAL EXCEPTION: main Process: com.example.alan.mainactivity, PID: 11545 java.lang.IllegalStateException: Could not find method insert(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatButton with id 'button' at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:307) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:266)
  at android.view.View.performClick(View.java:5198)
  at android.view.View$PerformClick.run(View.java:21147)
 at android.os.Handler.handleCallback(Handler.java:739)
 at android.os.Handler.dispatchMessage(Handler.java:95)
  at android.os.Looper.loop(Looper.java:148)
 at android.app.ActivityThread.main(ActivityThread.java:5417)
 at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

推荐答案

我发现了错误.

在布局 second_layout.xml 中，您使用 android:onClick="insert"

In layout second_layout.xml, you defined Button with android:onClick="insert"

此布局包含在 activity_user_profile.xml

这个activity_user_profile.xml用于Main2Activity.java

所以，这就是问题所在:

So, that is the issue:

插入按钮"正在Main2Activity.java 中使用.但是，该类没有任何方法 public void insert(View view)

"Insert Button" is being used in Main2Activity.java. However, that class does not have any method public void insert(View view)

因此，将其添加到您的 Main2Activity.java:

So, add this to your Main2Activity.java:

public void insert(View view){
    // Add the code that you want
    // Or do nothing if you want
}

记住

如果您在布局文件 (xml) 中设置任何 onClick 事件，则必须在将使用该布局的父活动中创建方法.

If you set any onClick event in a layout file (xml), you have to create the method in the parent activity that will use that layout.

这篇关于IllegalStateException:无法在父级或祖先上下文类 android.support.v7.widget.AppCompatButton 中找到方法 insert(View)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！