Question

我无法像大多数教程中那样创建新的自定义对话框。

public class MyDialog extends DialogFragment {

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        return new AlertDialog.Builder(getActivity())
                .setTitle("hi")
                .setMessage("hello")
                .setNeutralButton("ok", null)
                .create();
    }
}

现在我正在尝试创建一个新对象：

DialogFragment dialog = new MyDialog();

Android Studio向我展示：

需要DialogFragment，找到MyDialog

如何修复？

Answer 1

我用它来创建一个真正的自定义对话框。

这需要称为 alert_dialog_view

的布局

AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);
View alertView = getLayoutInflater().inflate(R.layout.alert_dialog_view, null);

//Set the view
alert.setView(alertView);
//Show alert
final AlertDialog alertDialog = alert.show();
//OPTIONAL Can not close the alert by touching outside.
alertDialog.setCancelable(false);
alertDialog.setCanceledOnTouchOutside(false);
alertDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

要创建标准对话框，您可以执行此操作...

public class DialogFragment extends DialogFragment {
   @Override
   public Dialog onCreateDialog(Bundle savedInstanceState) {
      // Use the Builder class for convenient dialog construction
      AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
      builder.setPositiveButton(R.string.fire, new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface dialog, int id) {
            toast.makeText(this,"enter a text here",Toast.LENTH_SHORT).show();
         }
      })
      .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface dialog, int id) {
            finish();
         });
         // Create the AlertDialog object and return it
         return builder.create();
      }
   }
}

Answer 2

我尝试如下创建自定义对话框：

在文件夹dialog.xml中创建XML文件layout，以设置对话框布局的布局和视图

在您的活动文件中：

 Dialog dialog = new Dialog(YourActivity.this);
 dialog.setTitle("Your dialog title");
 dialog.setContentView(R.layout.dialog);
 dialog.show();

单击以设置对话框内的视图，例如：

 Button btn = dialog.findViewById(R.id.btn_id);
 btn.setOnClickListener(new View.OnClickListener() {
   public void onClick(View view) 
   {
     //Insert your code here
   }
 });

无法创建新的自定义对话框

2 个答案: