我有一个对话框与EditText进行输入。当我单击对话框上的“是”按钮时,它将验证输入,然后关闭对话框。但是,如果输入错误,我希望保持在同一对话框中。每次无论输入是什么,当我单击“否”按钮时,对话框都会自动关闭。如何禁用此功能?顺便说一句,我在对话框中使用了PositiveButton和NegativeButton。


当前回答

使用此代码,您可以防止单击肯定按钮时对话框关闭。此外,您还可以使用否定按钮实现相同的功能。

    final AlertDialog alertDialog = alertDialogBuilder
            .setCancelable(false)
            .setTitle("TITLE");
            .setPositiveButton("OK", null)
            .setNegativeButton("CANCEL",
                    (dialog, id) -> {
                        dialog.cancel();
                    })
            .show();
    Button positiveButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
    positiveButton.setOnClickListener(v -> {
         // check whatever you want
         if(checkMyCondition())
             dialog.cancel();
    })

其他回答

受汤姆的回答启发,我认为这里的想法是:

在创建对话框期间将onClickListener设置为null然后在显示对话框后设置onClickListener。

您可以像Tom一样重写onShowListener。或者,您可以

调用AlertDialog的show()后获取按钮按如下方式设置按钮的onClickListener(我认为稍微可读一些)。

代码:

AlertDialog.Builder builder = new AlertDialog.Builder(context);
// ...
final AlertDialog dialog = builder.create();
dialog.show();
// now you can override the default onClickListener
Button b = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
b.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Log.i(TAG, "ok button is clicked");
        handleClick(dialog);
    }
});

对于API 8之前的版本,如果editText的内容不正确,我使用一个布尔标志、一个关闭监听器并再次调用dialog.show来解决这个问题。这样地:

case ADD_CLIENT:
        LayoutInflater factoryClient = LayoutInflater.from(this);
        final View EntryViewClient = factoryClient.inflate(
                R.layout.alert_dialog_add_client, null);

        EditText ClientText = (EditText) EntryViewClient
                .findViewById(R.id.client_edit);

        AlertDialog.Builder builderClient = new AlertDialog.Builder(this);
        builderClient
                .setTitle(R.string.alert_dialog_client)
                .setCancelable(false)
                .setView(EntryViewClient)
                .setPositiveButton("Save",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int whichButton) {
                                EditText newClient = (EditText) EntryViewClient
                                        .findViewById(R.id.client_edit);
                                String newClientString = newClient
                                        .getText().toString();
                                if (checkForEmptyFields(newClientString)) {
                                    //If field is empty show toast and set error flag to true;
                                    Toast.makeText(getApplicationContext(),
                                            "Fields cant be empty",
                                            Toast.LENGTH_SHORT).show();
                                    add_client_error = true;
                                } else {
                                    //Here save the info and set the error flag to false
                                    add_client_error = false;
                                }
                            }
                        })
                .setNegativeButton("Cancel",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int id) {
                                add_client_error = false;
                                dialog.cancel();
                            }
                        });
        final AlertDialog alertClient = builderClient.create();
        alertClient.show();

        alertClient
                .setOnDismissListener(new DialogInterface.OnDismissListener() {

                    @Override
                    public void onDismiss(DialogInterface dialog) {
                        //If the error flag was set to true then show the dialog again
                        if (add_client_error == true) {
                            alertClient.show();
                        } else {
                            return;
                        }

                    }
                });
        return true;

对于ProgressDialogs

要防止对话框自动关闭,必须在显示ProgressDialog后设置OnClickListener,如下所示:

connectingDialog = new ProgressDialog(this);

connectingDialog.setCancelable(false);
connectingDialog.setCanceledOnTouchOutside(false);

// Create the button but set the listener to a null object.
connectingDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", 
        (DialogInterface.OnClickListener) null )

// Show the dialog so we can then get the button from the view.
connectingDialog.show();

// Get the button from the view.
Button dialogButton = connectingDialog.getButton( DialogInterface.BUTTON_NEGATIVE);

// Set the onClickListener here, in the view.
dialogButton.setOnClickListener( new View.OnClickListener() {

    @Override
    public void onClick ( View v ) {

        // Dialog will not get dismissed until you call dismiss() explicitly.

    }

});

超简单的Kotlin方法

 with(AlertDialog.Builder(this)) {
        setTitle("Title")
        setView(R.layout.dialog_name)
        setPositiveButton("Ok", null)
        setNegativeButton("Cancel") { _, _ -> }
        create().apply {
            setOnShowListener {
                getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
                    //Validate and dismiss
                    dismiss()
                }
            }
        }
    }.show()

这段代码对你有用,因为我有一个类似的问题,这对我有用。:)

1-重写片段对话框类中的Onstart()方法。

@Override
public void onStart() {
    super.onStart();
    final AlertDialog D = (AlertDialog) getDialog();
    if (D != null) {
        Button positive = (Button) D.getButton(Dialog.BUTTON_POSITIVE);
        positive.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                if (edittext.equals("")) {
   Toast.makeText(getActivity(), "EditText empty",Toast.LENGTH_SHORT).show();
                } else {
                D.dismiss(); //dissmiss dialog
                }
            }
        });
    }
}