按钮onClick错误...找不到方法

Question

我似乎无法Activity从我开始新的Button,我在这里寻找答案,但似乎无法解决问题.我希望有人有一个简单的解决方案.提前致谢.

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中

    <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中

<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);
    }
}

Answer 1

问题出在您的方法签名中

public void openSearch(){

它应该有一个,只有一个参数,这是一个View.

将其更改为

public void openSearch(View v){

v显然可以是你希望它是什么,但你应该让一些有意义的事情一样v,view等...

来自Docs

为了使其工作,该方法必须是公共的并接受View作为其唯一参数.

有关添加Buttons和的更详细说明,请参阅此答案OnClick