Java 为什么可以';我不能让我的听众去工作吗?为什么Eclipse中的这个代码片段会给出一个;是否应改为“ClassHeader”;?
您不能像这里所做的那样在类之外声明变量。相反,您应该在类或方法中声明它:Java 为什么可以';我不能让我的听众去工作吗?为什么Eclipse中的这个代码片段会给出一个;是否应改为“ClassHeader”;?,java,android,Java,Android,您不能像这里所做的那样在类之外声明变量。相反,您应该在类或方法中声明它: package com.example.helloandroid; import android.app.Activity; import android.os.Bundle; import android.widget.Button; import android.view.View; import android.view.View.OnClickListener; //Create an anonymous i
package com.example.helloandroid;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
//Create an anonymous implementation of OnClickListener
private OnClickListener buttonPress = new OnClickListener() {
public void onClick(View v) {
// do something when the button is clicked
// setContentView(R.layout.panic);
}
}
public class HelloAndroid extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Button myPanicButton = (Button)findViewById(R.id.PanicButton);
setContentView(R.layout.main);
myPanicButton.setOnClickListener(buttonPress);
}
};
或
你太棒了。谢谢。成功了。我发誓我的课本显示了我的错误方式。吓人的!
public class HelloAndroid extends Activity {
//Create an anonymous implementation of OnClickListener
private OnClickListener buttonPress = new OnClickListener() {
public void onClick(View v) {
// do something when the button is clicked
// setContentView(R.layout.panic);
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Button myPanicButton = (Button)findViewById(R.id.PanicButton);
setContentView(R.layout.main);
myPanicButton.setOnClickListener(buttonPress);
}
};
public class HelloAndroid extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Button myPanicButton = (Button)findViewById(R.id.PanicButton);
setContentView(R.layout.main);
//Create an anonymous implementation of OnClickListener
OnClickListener buttonPress = new OnClickListener() {
public void onClick(View v) {
// do something when the button is clicked
// setContentView(R.layout.panic);
}
}
myPanicButton.setOnClickListener(buttonPress);
}
};