错误：（28）错误：此类应提供默认的构造函数（不带参数的公共构造函数）（myclassname.HelpDialog）[Instantiatable] [英] Error:(28) Error: This class should provide a default constructor (a public constructor with no arguments) (myclassname.HelpDialog) [Instantiatable]

问题描述

在调试模式下编译时一切都很好。但是在Release配置中编译时，发生以下错误：

Everything went fine while compiling in debug mode. But while compiling in Release configuration, following error occurs :

错误：（28）错误：此类应提供默认的构造函数（公共没有参数的构造函数）（myclassname.HelpDialog）[可实例化]

Error:(28) Error: This class should provide a default constructor (a public constructor with no arguments) (myclassname.HelpDialog) [Instantiatable]

这是代码

public class HelpDialog extends Dialog {

    Activity mActivity;
    Button btn_go_back;   

    public HelpDialog(Activity mactivity) {
        super();
        this.mActivity = mactivity;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.dialog_help);   

        btn_go_back = (Button)findViewById(R.id.btn_help_go_back);

        btn_go_back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dismiss();
            }
        });
    }
}

推荐答案

添加此兄弟：

public HelpDialog( ){ 
  super(null);
}

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