我创建了一个自定义对话框，我想开始一个新的活动被点击时确定。我怎样才能获得的上下文将其设置为我的意图构造的第一个参数？

我可以创建使用的getContext（）的意图，但我不能叫 startActivity 。难道我通过活动呼吁对话，以对话的构造？它是通常的方式通过单击对话框启动活动？

 公共类CustomDialog扩展对话框实现OnClickListener {
    按钮okButton，cancelButton;

    公共CustomDialog（上下文的背景下）{
        超（上下文）;
        的setContentView（R.layout.custom_dialog）;
        okButton =（按钮）findViewById（R.id.button_ok）;
        okButton.setOnClickListener（本）;
        cancelButton =（按钮）findViewById（R.id.button_cancel）;
        cancelButton.setOnClickListener（本）;
    }

    @覆盖
    公共无效的onClick（视图v）{
        如果（V == cancelButton）
            解雇（）;
        其他 {
            意图I =新的意图（的getContext（），ItemSelection.class）;
            startActivity（ⅰ）; //该方法startActivity（意向）是未定义CustomDialog类型
        }
    }
}
 

解决方案

 公共类CustomDialog扩展对话框实现OnClickListener {
  按钮okButton，cancelButton;
  活动mActivity;

  公共CustomDialog（活动活动）{
    超（活动）;
    mActivity =活动;
    的setContentView（R.layout.custom_dialog）;
    okButton =（按钮）findViewById（R.id.button_ok）;
    okButton.setOnClickListener（本）;
    cancelButton =（按钮）findViewById（R.id.button_cancel）;
    cancelButton.setOnClickListener（本）;
  }

  @覆盖
  公共无效的onClick（视图v）{
    如果（V == cancelButton）
        解雇（）;
    其他 {
        意图I =新的意图（mActivity，ItemSelection.class）;
        mActivity.startActivity（ⅰ）;
    }
  }
}
 

I created a custom dialog and I'd like to start a new activity when OK is clicked. How can I get the context to set it as first argument of my Intent constructor?

I can create the intent using getContext(), but I can't call startActivity. Shall I pass the activity calling the dialog to the dialog's constructor? Is it the usual way to start an activity by clicking a dialog?

public class CustomDialog extends Dialog implements OnClickListener {
    Button okButton, cancelButton;

    public CustomDialog(Context context) {      
        super(context);     
        setContentView(R.layout.custom_dialog);
        okButton = (Button) findViewById(R.id.button_ok);
        okButton.setOnClickListener(this);
        cancelButton = (Button) findViewById(R.id.button_cancel);
        cancelButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {       
        if (v == cancelButton)
            dismiss();
        else {
            Intent i = new Intent(getContext(), ItemSelection.class);
            startActivity(i); //The method startActivity(Intent) is undefined for the type CustomDialog
        }
    }
}

public class CustomDialog extends Dialog implements OnClickListener {
  Button okButton, cancelButton;
  Activity mActivity;

  public CustomDialog(Activity activity) {      
    super(activity);
    mActivity = activity;
    setContentView(R.layout.custom_dialog);
    okButton = (Button) findViewById(R.id.button_ok);
    okButton.setOnClickListener(this);
    cancelButton = (Button) findViewById(R.id.button_cancel);
    cancelButton.setOnClickListener(this);
  }

  @Override
  public void onClick(View v) {       
    if (v == cancelButton)
        dismiss();
    else {
        Intent i = new Intent(mActivity, ItemSelection.class);
        mActivity.startActivity(i);
    }
  }
}