防止对话框在单击时关闭，并且仅在internet可用时关闭

我也在尝试做同样的事情，因为我不希望对话框在互联网连接之前关闭。

这是我的代码：

AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this); builder.setTitle("Internet Not Connected");
    if(ifConnected()){

        Toast.makeText(this, "Connected or not", Toast.LENGTH_LONG).show();
    }
    else{
        builder.setPositiveButton("Retry", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
               if(!ifConnected())
               {
                   builder.show();
               }
            }
        }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                finish();
            }
        });
        builder.show();

    }

这是我的连接管理器代码：

 private boolean ifConnected()
{
    ConnectivityManager connectivityManager= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo();
   return networkInfo!=null && networkInfo.isConnected();
}

我编写了一个简单的类（AlertDialogBuilder），您可以使用它在按下对话框按钮时禁用自动关闭功能。

它还与Android 1.6兼容，因此它不使用OnShowListener（仅API>=8可用）。

因此，您可以使用此CustomAlertDialogBuilder，而不是使用AlertDialogBuilder。最重要的部分是不应该调用create（），而应该只调用show（）方法。我添加了setCanceledOnTouchOutside（）和setOnDismissListener等方法，这样您仍然可以直接在生成器上设置它们。

我在Android 1.6、2.x、3.x和4.x上测试了它，所以它应该工作得很好。如果你发现一些问题，请在这里评论。

package com.droidahead.lib.utils;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.View;
import android.view.View.OnClickListener;

public class CustomAlertDialogBuilder extends AlertDialog.Builder {
    /**
     * Click listeners
     */
    private DialogInterface.OnClickListener mPositiveButtonListener = null;
    private DialogInterface.OnClickListener mNegativeButtonListener = null;
    private DialogInterface.OnClickListener mNeutralButtonListener = null;

    /**
     * Buttons text
     */
    private CharSequence mPositiveButtonText = null;
    private CharSequence mNegativeButtonText = null;
    private CharSequence mNeutralButtonText = null;

    private DialogInterface.OnDismissListener mOnDismissListener = null;

    private Boolean mCancelOnTouchOutside = null;

    public CustomAlertDialogBuilder(Context context) {
        super(context);
    }

    public CustomAlertDialogBuilder setOnDismissListener (DialogInterface.OnDismissListener listener) {
        mOnDismissListener = listener;
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setNegativeButton(CharSequence text, DialogInterface.OnClickListener listener) {
        mNegativeButtonListener = listener;
        mNegativeButtonText = text;
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setNeutralButton(CharSequence text, DialogInterface.OnClickListener listener) {
        mNeutralButtonListener = listener;
        mNeutralButtonText = text;
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setPositiveButton(CharSequence text, DialogInterface.OnClickListener listener) {
        mPositiveButtonListener = listener;
        mPositiveButtonText = text;
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setNegativeButton(int textId, DialogInterface.OnClickListener listener) {
        setNegativeButton(getContext().getString(textId), listener);
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setNeutralButton(int textId, DialogInterface.OnClickListener listener) {
        setNeutralButton(getContext().getString(textId), listener);
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setPositiveButton(int textId, DialogInterface.OnClickListener listener) {
        setPositiveButton(getContext().getString(textId), listener);
        return this;
    }

    public CustomAlertDialogBuilder setCanceledOnTouchOutside (boolean cancelOnTouchOutside) {
        mCancelOnTouchOutside = cancelOnTouchOutside;
        return this;
    }



    @Override
    public AlertDialog create() {
        throw new UnsupportedOperationException("CustomAlertDialogBuilder.create(): use show() instead..");
    }

    @Override
    public AlertDialog show() {
        final AlertDialog alertDialog = super.create();

        DialogInterface.OnClickListener emptyOnClickListener = new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) { }
        };


        // Enable buttons (needed for Android 1.6) - otherwise later getButton() returns null
        if (mPositiveButtonText != null) {
            alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, mPositiveButtonText, emptyOnClickListener);
        }

        if (mNegativeButtonText != null) {
            alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, mNegativeButtonText, emptyOnClickListener);
        }

        if (mNeutralButtonText != null) {
            alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, mNeutralButtonText, emptyOnClickListener);
        }

        // Set OnDismissListener if available
        if (mOnDismissListener != null) {
            alertDialog.setOnDismissListener(mOnDismissListener);
        }

        if (mCancelOnTouchOutside != null) {
            alertDialog.setCanceledOnTouchOutside(mCancelOnTouchOutside);
        }

        alertDialog.show();

        // Set the OnClickListener directly on the Button object, avoiding the auto-dismiss feature
        // IMPORTANT: this must be after alert.show(), otherwise the button doesn't exist..
        // If the listeners are null don't do anything so that they will still dismiss the dialog when clicked
        if (mPositiveButtonListener != null) {
            alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    mPositiveButtonListener.onClick(alertDialog, AlertDialog.BUTTON_POSITIVE);
                }
            });
        }

        if (mNegativeButtonListener != null) {
            alertDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    mNegativeButtonListener.onClick(alertDialog, AlertDialog.BUTTON_NEGATIVE);
                }
            });
        }

        if (mNeutralButtonListener != null) {
            alertDialog.getButton(AlertDialog.BUTTON_NEUTRAL).setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    mNeutralButtonListener.onClick(alertDialog, AlertDialog.BUTTON_NEUTRAL);
                }
            });
        }

        return alertDialog;
    }   
}

EDIT下面是一个关于如何使用CustomAlertDialogBuilder的小示例：

// Create the CustomAlertDialogBuilder
CustomAlertDialogBuilder dialogBuilder = new CustomAlertDialogBuilder(context);

// Set the usual data, as you would do with AlertDialog.Builder
dialogBuilder.setIcon(R.drawable.icon);
dialogBuilder.setTitle("Dialog title");
dialogBuilder.setMessage("Some text..");

// Set your buttons OnClickListeners
dialogBuilder.setPositiveButton ("Button 1", new DialogInterface.OnClickListener() {
    public void onClick (DialogInterface dialog, int which) {
        // Do something...

        // Dialog will not dismiss when the button is clicked
        // call dialog.dismiss() to actually dismiss it.
    }
});

// By passing null as the OnClickListener the dialog will dismiss when the button is clicked.               
dialogBuilder.setNegativeButton ("Close", null);

// Set the OnDismissListener (if you need it)       
dialogBuilder.setOnDismissListener(new DialogInterface.OnDismissListener() {
    public void onDismiss(DialogInterface dialog) {
        // dialog was just dismissed..
    }
});

// (optional) set whether to dismiss dialog when touching outside
dialogBuilder.setCanceledOnTouchOutside(false);

// Show the dialog
dialogBuilder.show();

干杯

Yuvi

如果您正在使用DialogFragment，这是处理Dialog的推荐方法。

AlertDialog的setButton（）方法（我认为AlertDialogBuilder的setPositiveButton（（）和setNegativeButton（）也是如此）所发生的事情是，您使用它设置的按钮（例如AlertDialog.button_POSITIVE）在按下时实际上会触发两个不同的OnClickListener对象。

第一个是DialogInterface.OnClickListener，它是setButton（）、setPositiveButton（（）和setNegativeButton（）的参数。

另一个是View.OnClickListener，它将被设置为在按下任何按钮时自动关闭AlertDialog，并且由AlertDialog自身设置。

您可以做的是使用带有null的setButton（）作为DialogInterface.OnClickListener来创建按钮，然后在View.OnClick Listener中调用自定义操作方法。例如，

@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
    AlertDialog alertDialog = new AlertDialog(getActivity());
    // set more items...
    alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "OK", null);

    return alertDialog;
}

然后，您可以在DialogFragment的onResume（）方法中重写默认AlertDialog的按钮View.OnClickListener（否则将关闭对话框）：

@Override
public void onResume()
{
    super.onResume();
    AlertDialog alertDialog = (AlertDialog) getDialog();
    Button okButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
    okButton.setOnClickListener(new View.OnClickListener() { 
        @Override
        public void onClick(View v)
        {
            performOkButtonAction();
        }
    });
}

private void performOkButtonAction() {
    // Do your stuff here
}

您需要在onResume（）方法中设置此值，因为getButton（）将返回null，直到显示对话框！

这将导致您的自定义操作方法只被调用一次，默认情况下对话框不会被关闭。

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
                }
            }
        });
    }
}

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.

    }

});

以下是针对所有类型对话框的一些解决方案，包括AlertDialog.Builder的解决方案，该解决方案可以在所有API级别上工作（低于API 8，而这里的另一个答案则不适用）。有使用AlertDialog.Builder、DialogFragment和DialogPreference的AlertDialog解决方案。

下面的代码示例显示了如何覆盖默认的公共按钮处理程序，并防止这些不同形式的对话框关闭对话框。所有示例都显示了如何防止肯定按钮关闭对话框。

注意：对于那些需要更多详细信息的人来说，下面的示例描述了基本android类的对话框关闭是如何在后台工作的，以及为什么选择以下方法

AlertDialog.Builder-显示后立即更改默认按钮处理程序（）

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("Test for preventing dialog close");
builder.setPositiveButton("Test", 
        new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                //Do nothing here because we override this button later to change the close behaviour. 
                //However, we still need this because on older versions of Android unless we 
                //pass a handler the button doesn't get instantiated
            }
        });
final AlertDialog dialog = builder.create();
dialog.show();
//Overriding the handler immediately after show is probably a better approach than OnShowListener as described below
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener()
      {            
          @Override
          public void onClick(View v)
          {
              Boolean wantToCloseDialog = false;
              //Do stuff, possibly set wantToCloseDialog to true then...
              if(wantToCloseDialog)
                  dialog.dismiss();
              //else dialog stays open. Make sure you have an obvious way to close the dialog especially if you set cancellable to false.
          }
      });
      

DialogFragment-重写onResume（）

@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setMessage("Test for preventing dialog close");
    builder.setPositiveButton("Test", 
        new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                //Do nothing here because we override this button later to change the close behaviour. 
                //However, we still need this because on older versions of Android unless we 
                //pass a handler the button doesn't get instantiated
            }
        });
    return builder.create();
}

//onStart() is where dialog.show() is actually called on 
//the underlying dialog, so we have to do it there or 
//later in the lifecycle.
//Doing it in onResume() makes sure that even if there is a config change 
//environment that skips onStart then the dialog will still be functioning
//properly after a rotation.
@Override
public void onResume()
{
    super.onResume();    
    final AlertDialog d = (AlertDialog)getDialog();
    if(d != null)
    {
        Button positiveButton = (Button) d.getButton(Dialog.BUTTON_POSITIVE);
        positiveButton.setOnClickListener(new View.OnClickListener()
                {
                    @Override
                    public void onClick(View v)
                    {
                        Boolean wantToCloseDialog = false;
                        //Do stuff, possibly set wantToCloseDialog to true then...
                        if(wantToCloseDialog)
                            d.dismiss();
                        //else dialog stays open. Make sure you have an obvious way to close the dialog especially if you set cancellable to false.
                    }
                });
    }
}

DialogPreference-覆盖showDialog（）

@Override
protected void onPrepareDialogBuilder(Builder builder)
{
    super.onPrepareDialogBuilder(builder);
    builder.setPositiveButton("Test", this);   //Set the button here so it gets created
}

@Override
protected void showDialog(Bundle state)
{       
    super.showDialog(state);    //Call show on default first so we can override the handlers

    final AlertDialog d = (AlertDialog) getDialog();
    d.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener()
            {            
                @Override
                public void onClick(View v)
                {
                    Boolean wantToCloseDialog = false;
                    //Do stuff, possibly set wantToCloseDialog to true then...
                    if(wantToCloseDialog)
                        d.dismiss();
                    //else dialog stays open. Make sure you have an obvious way to close the dialog especially if you set cancellable to false.
                }
            });
}

方法说明：

通过查看Android源代码，AlertDialog默认实现通过向OnCreate（）中的所有实际按钮注册公共按钮处理程序来工作。单击按钮时，通用按钮处理程序会将单击事件转发给您在setButton（）中传递的任何处理程序，然后调用该处理程序会关闭对话框。如果希望在按下其中一个按钮时阻止对话框关闭，则必须替换按钮实际视图的通用按钮处理程序。因为它是在OnCreate（）中分配的，所以必须在调用默认的OnCreate（（）实现后替换它。在show（）方法的过程中调用OnCreate。您可以创建一个自定义对话框类，并重写OnCreate（）以调用super.OnCreate（），然后重写按钮处理程序，但是如果您创建了自定义对话框，则无法免费获得Builder，在这种情况下，有什么意义？因此，按照对话框的设计方式使用对话框，但同时控制何时关闭对话框，一种方法是首先调用dialog.Show（），然后使用dialog.getButton（）获取对按钮的引用，以覆盖单击处理程序。另一种方法是使用setOnShowListener（）并实现查找按钮视图并替换OnShowListen中的处理程序。两者之间的功能差异“几乎”为零，这取决于最初创建对话框实例的线程。通过查看源代码，onShowListener被发送到创建该对话框的线程上运行的处理程序的消息调用。所以，由于OnShowListener是由发布在消息队列上的消息调用的，所以从技术上讲，调用侦听器可能会在显示完成后延迟一段时间。因此，我认为最安全的方法是首先调用show.Dialog（），然后立即在同一执行路径中替换按钮处理程序。由于调用show（）的代码将在主GUI线程上运行，这意味着在该线程上执行任何其他代码之前，都将先执行您跟随show（）执行的代码，而OnShowListener方法的计时取决于消息队列。