android - Google Android "HelloFormStuff"教程的 Java 错误

Question

我是一个Java新手。我遵循了 http://developer.android.com/resources/tutorials/views/hello-formstuff.html 上的教程通过将教程代码复制到我的代码中来添加按钮和 OnClick 处理程序:

public class FormStuff extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final ImageButton button = (ImageButton) findViewById(R.id.android_button);
        button.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                // Perform action on clicks
                Toast.makeText(FormStuff.this, "Beep Bop", Toast.LENGTH_SHORT).show();
            }
        });
        }
}

在 Eclipse 中这会产生两个错误

Description Resource    Path    Location    Type
The method setOnClickListener(View.OnClickListener) in the type View is not applicable for the arguments (new DialogInterface.OnClickListener(){})  FormStuff.java  /FormStuffExample/src/com/example/formstuffexample  line 17 Java Problem
The type new DialogInterface.OnClickListener(){} must implement the inherited abstract method DialogInterface.OnClickListener.onClick(DialogInterface, int) FormStuff.java  /FormStuffExample/src/com/example/formstuffexample  line 17 Java Problem

我做错了什么？谢谢!

Answer 1

完全基于错误信息...

您正在(隐含地)使用错误的 OnClickListener 接口(interface)/类。看起来有两个，View.OnClickListener 和 DialogInterface.OnClickListener。

解决方案是完全限定您的匿名 OnClickListener。

button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on clicks
                Toast.makeText(FormStuff.this, "Beep Bop", Toast.LENGTH_SHORT).show();
            }
        });