发送短信之前显示确认对话框

Question

我是Android的新手，已经完全绑定了我的应用程序，但是现在我希望对其进行更改。

当有人发送短信时，我想显示一个确认对话框，以发送短信询问是否发送短信。我必须为其编写一个源代码，并使其能够正常工作，但是如果用户未单击“是”或“取消”，该对话框将消失，但希望它仍将显示，直到用户未单击“是”或“我”为止，取消按钮。

如何解决？

public void send_SMS( final String message)
    { 
    try{


        AlertDialog.Builder dialog = new AlertDialog.Builder(ctx);
        dialog.setTitle("Send SMS");
        dialog.setMessage("Are U sure want to Send SMS");
        dialog.setCancelable(true);
        dialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                sentpi = PendingIntent.getBroadcast(ctx, 0, new Intent(SENT),0);
                delpi = PendingIntent.getBroadcast(ctx, 0, new Intent(DELIVERED), 0);//
                String id = message.substring(3, 4);
                int msgId = Integer.valueOf(id, 16).intValue();

                if(dba.IsConOpenOrClose()==false)
                    dba.Open();
                if(ConstantClass.SelectCord.equals("All")){
                    if(msgId == 3 || msgId == 9){   
                    devId = message.substring(4, 20);
                    ConstantClass.CurrentId = devId;
                    strSql = new String("SELECT * FROM "+ ConstantClass.dbName[2] + " WHERE " + DataBaseAdapter.Key_DevID + " = ?");
                    cur = dba.ExecuteSelect(strSql, devId);
                    if(cur!=null)
                        cur.moveToFirst();
                    int cordId = cur.getInt(cur.getColumnIndex(DataBaseAdapter.Key_DevCoordId));
                    phoneNumber = dba.getSendSmsMobileNo(cordId);
                    dba.prcUpdateOrClean(devId, 1);
                    cur.close();
                    }
                }else{
                    phoneNumber = dba.getSendSmsMobileNo(dba.CurrentWorkingCoordinator(DataBaseAdapter.Key_SendCoord, 1));
                /*********now getting the Field smsProcess Update for particular devices ********************/
                if(msgId == 3 || msgId == 9 || msgId == 7){
                    devId = message.substring(4, 20);
                    if(dba.IsConOpenOrClose()==false)
                        dba.Open();
                    ConstantClass.CurrentId = devId;
                    dba.prcUpdateOrClean(devId, 1);

                }else if(msgId == 15 || msgId == 13 || msgId == 11 || msgId == 1){
                    if (dba.IsConOpenOrClose()==false)
                        dba.Open();
                    phoneNumber = dba.getSendSmsMobileNo(dba.CurrentWorkingCoordinator(DataBaseAdapter.Key_SendCoord, 1));
                    if(phoneNumber.length()==11){
                        pdNo = phoneNumber.substring(1, 11);
                    }else{
                        pdNo = phoneNumber.substring(0, 10);
                    }
                    devId = "000000" + pdNo;
                    ConstantClass.CurrentId = devId;                
                    dba.prcUpdateOrClean(devId, 1);

                }
                }
                  SmsManager sms = SmsManager.getDefault();
                  if(phoneNumber!=null){
                      sms.sendTextMessage(phoneNumber, null, message.toUpperCase(), sentpi, delpi); 
                  }else{
                      throw new java.lang.NullPointerException() ;
                  }               
            }
        });
        dialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.cancel();
            }
        });
        AlertDialog dlg = dialog.create();
        dlg.show();       
    }catch(Throwable e){
        dlg = new ExceptionDialog(this.ctx,"Sending SMS",e.getMessage());
        dlg.show();
    }   
}
public BroadcastReceiver sms_send = new BroadcastReceiver(){
    @Override
    public void onReceive(Context context,Intent intent){
        String Info = "Send Info:";
        switch(getResultCode()){
        case Activity.RESULT_OK:
            Info += "Sms Send Successfull";
            break;
        case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
            Info += "Sms Sending faild : genric faliure";
            break;
        case SmsManager.RESULT_ERROR_NO_SERVICE:
            Info += "Sending failed due to no Service";
            break;
        case SmsManager.RESULT_ERROR_NULL_PDU:
            Info += "Send failed : Null PDU";
            break;
        case SmsManager.RESULT_ERROR_RADIO_OFF:
            Info += "Send failed: Radio Service OFF";
            break;
        }
         Toast.makeText(ctx, Info, Toast.LENGTH_SHORT).show();
    }
};
public BroadcastReceiver sms_delivered = new BroadcastReceiver(){
    @Override 
    public void onReceive(Context context, Intent intent){
        String Info = "SMS Delivered :";
        switch(getResultCode()){
        case Activity.RESULT_OK:
            Info += "Sms Deliverd";
            break;
        case Activity.RESULT_CANCELED:
            Info += "Sms not Delivered";
            break;
        }
        Toast.makeText(ctx, Info, Toast.LENGTH_SHORT).show();
    }
};
public IntentFilter getSentIntentFilter(){
    return new IntentFilter(SENT);      
}
public IntentFilter getDeliveredFilter(){
    return new IntentFilter(DELIVERED);
}
/*private void reThrow(MyException ex){
    if(ex.nullPointerException instanceof NullPointerException  ){

    }
}
private class MyException extends Exception{
    public Exception nullPointerException;
    public MyException (){}
    public MyException(Exception NullPointerException){
        this.nullPointerException = NullPointerException;       
    }
}*/
}

Answer 1

dialog.setCancelable(true); should be like  dialog.setCancelable(false);

当用户按下返回按钮时，它可以防止关闭警报对话框：)