按钮onClick错误...找不到方法 [英] Button onClick error...Could not find a method

问题描述

我似乎无法从Button开始新的Activity，我在这里搜索了答案，但似乎无法解决问题.我希望有人有一个简单的解决方案.提前谢谢.

I can't seem to start a new Activity from my Button, I have searched here for answers, but can't seem to resolve the problem. I hope someone has an easy solution. Thanks In advance.

这是错误:

E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.IllegalStateException: Could not find a method openSearch(View) in the 
activity class dk.mathias.splitcab.MainActivity 
for onClick handler on view class android.widget.Button with id 'btnStartSearch'

MainActivity.java

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

}

public void openSearch(){
    Intent openSearchIntent = new Intent(MainActivity.this, StartSearch.class);
    startActivity(openSearchIntent);
}

AndroidManifest.xml

AndroidManifest.xml

    <activity
        android:name=".StartSearch"
        android:label="@string/title_activity_start_search" >
        <intent-filter>
            <action android:name="dk.mathias.splitcab.STARTSEARCH" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

activity_main.xml

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/StartSearch"
    android:id="@+id/btnStartSearch"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_alignRight="@+id/tvWelcome"
    android:layout_alignEnd="@+id/tvWelcome"
    android:onClick="openSearch"

    />

StartSearch.java

public class StartSearch extends Activity {

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

推荐答案

问题出在您的方法签名中

The problem is in your method signature

public void openSearch(){

它应该只有一个参数，并且是一个View.

it should have one, and only one param, which is a View.

将其更改为

public void openSearch(View v){

v显然可以是您想要的任何东西，但是您应该使它有意义，例如v，view等...

v obviously can be anything you want it to be but you should make it something meaningful like v, view, etc...

从文档中

为此，该方法必须是公共的，并且必须将View作为其唯一参数.

In order for this to work, the method must be public and accept a View as its only parameter.

查看此答案有关添加Buttons和OnClick

这篇关于按钮onClick错误...找不到方法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！