问题描述

在下面的代码中，如何关闭警报框?我不想造成内存泄漏.我在alertDialog上尝试了.dismiss()，但是没有用...谢谢

In the following code below, how do I dismiss the alert box? I don't want to cause a memory leak. I tried the .dismiss() on alertDialog, but that didn't work... Thanks

// User pressed the stop button
public void StopMsg_button_action(View view){
    final EditText password_input = new EditText(this); // create an text input field
    password_input.setHint("Enter Password"); // put a hint in it
    password_input.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD); // change it to password type

    AlertDialog.Builder alertDialog = new Builder(this); // create an alert box
    alertDialog.setTitle("Enter Password"); // set the title
    alertDialog.setView(password_input);  // insert the password text field in the alert box
    alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() { // define the 'OK' button
        public void onClick(DialogInterface dialog, int which) {
             String entered_password = password_input.getText().toString();
             if (entered_password.equals(my_password)) {
                locManager.removeUpdates(locListener); // stop listening for GPS coordinates
                startActivity(new Intent(Emergency_1Activity.this,Main_MenuActivity.class)); // go to main menu
             } else {
                 alert("Incorrect Password");
             }
        } 
    });
    alertDialog.setNeutralButton("Cancel", new DialogInterface.OnClickListener() { // define the 'Cancel' button
        public void onClick(DialogInterface dialog, int which) {

        } 
    });
    alertDialog.show(); // show the alert box
}

推荐答案

dismiss() 有什么问题?

What didn't work about dismiss()?

您应该可以使用 Dialog.dismiss()，或 Dialog.cancel()

You should be able to use either Dialog.dismiss(), or Dialog.cancel()

alertDialog.setNeutralButton("Cancel", new DialogInterface.OnClickListener() { // define the 'Cancel' button
    public void onClick(DialogInterface dialog, int which) {
        //Either of the following two lines should work.
        dialog.cancel();
        //dialog.dismiss();
    } 
});

这篇关于如何关闭 AlertDialog.Builder?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！