【发布时间】：2015-04-18 14:51:25
【问题描述】：
我最近开始在 android 中进行开发，目前卡在我需要从对话框接收值的地方。我有一个扩展 fragmentActivity 和一个 AlertDialog 类的 mainActivity。
1）我在 AlertDialog 类中创建了一个静态方法 showDefalutDialog，并从 mainActivity 按钮单击侦听器调用它，并将参数传递给 alertDialog。
2) 在 showDefalutDialog 静态方法中，我分别创建了带有 Yes/No DialogInterface 的 .setPositivebutton 和 .setNegativeButton。
现在这就是我想要做的。
1)当点击界面上的yes按钮时，它应该返回一个值给mainActivity 所以我可以在 if 语句中实现它来执行某个功能。
从 windows c# 编程这样做不是问题，但我只是不知道如何在 android 中实现它下面是相关的代码片段
private void sendSms()
{
SharedPreferences pref = getApplicationContext().getSharedPreferences("Sms_MyPref", 0);
mail = pref.getString("email", null); // getting String
tel = pref.getString("receiver_tel", null); // getting String
layout = (LinearLayout)findViewById(R.id.linearLayout1);
from_dateEdit = (EditText) findViewById(R.id.date_edit);
to_dateEdit = (EditText) findViewById(R.id.date_edit_to);
snButton = (Button)findViewById(R.id.form_send_button);
from = (Button)findViewById(R.id.from);
to = (Button)findViewById(R.id.to);
spn = (Spinner)findViewById(R.id.form_spinner);
spn.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
Object item = parent.getItemAtPosition(pos);
spinnerV = (String) item;
if(pos == 0)
{
layout.setVisibility( pos == 0 ? View.VISIBLE : View.VISIBLE);
from_dateEdit.setText(DatePickerFragment.getYesteesDate());
from.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
showDatePicker();
}
});
to_dateEdit.setText(DatePickerFragment.getTodaysDate());
to.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
showDatePicker2();
}
});
new1 = null;
new2 = null;
from_dateEdit.setText(new1);
to_dateEdit.setText(new2);
}
else if(pos == 1)
{
layout.setVisibility( pos == 1 ? View.GONE : View.VISIBLE);
new1 = null;
new2 = null;
new1 = "a";
new2 = "b";
}
else if(pos == 2)
{
layout.setVisibility( pos == 2 ? View.GONE : View.VISIBLE);
new1 = null;
new2 = null;
new1 = "a";
new2 = "b";
}
else if(pos == 3)
{
layout.setVisibility( pos == 3 ? View.GONE : View.VISIBLE);
new1 = null;
new2 = null;
new1 = "a";
new2 = "b";
}
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
snButton.setOnClickListener(new OnClickListener() {
public void onClick(View view)
{
if(new1 == null && new2 == null)
{
alert.showAlertDialog(MainActivity.this, "Error..", "Please specify a date range", false);
}
else if(new1 != null && new2 == null)
{
alert.showAlertDialog(MainActivity.this, "Error..", "Please specify a date TO", false);
}
else if(new1 == null && new2 != null)
{
alert.showAlertDialog(MainActivity.this, "Error..", "Please specify a date FROM", false);
}
else
{
gen = new1.toString()+","+new2.toString();
alert();
//i want to return a value from dialog yes/no click
if(/*dialog yes is clicked*/)
{
sms();
}
else if(/*dialog No is clicked*/)
{
return;
}
}
}
});
}
private void alert()
{
AlertDialogManager.showDefalutDialog(getApplicationContext(), spinnerV, mail, new1,new2);
}
public void sms()
{
String both = "{"+ spinnerV.toString() + ","+gen.toString()+","+ mail.toString()+"}";
sendSMS(tel,both);
}
和来自 AlertDialog 类的 showDefaultDialog 静态方法
@SuppressLint("InflateParams")
public static void showDefalutDialog(final Context context, String order, final String mail, String fromD, String toD) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
// set title
alertDialogBuilder.setTitle(R.string.finalmsg);
LayoutInflater li = LayoutInflater.from(context);
View view = li.inflate(R.layout.data_summary_view, null);
EditText EMAIL = (EditText)view.findViewById(R.id.Email);
EditText Selectedorder = (EditText)view.findViewById(R.id.order);
EditText Dfrom = (EditText)view.findViewById(R.id.edit_from);
EditText Dto= (EditText)view.findViewById(R.id.edit_to);
LinearLayout ll = (LinearLayout) view.findViewById(R.id.datelayout);
LinearLayout l2 = (LinearLayout) view.findViewById(R.id.datelayout2);
Selectedorder.setText(order);
EMAIL.setText(mail);
if(fromD.toString() != "a" && toD.toString() != "b")
{
ll.setVisibility(View.VISIBLE);
l2.setVisibility(View.VISIBLE);
Dfrom.setText(fromD);
Dto.setText(toD);
}
else if(fromD.toString() == "a" && toD.toString() == "b")
{
ll.setVisibility(View.GONE);
l2.setVisibility(View.GONE);
}
// set dialog message
alertDialogBuilder.setView(view);
//int msdt = data.toString().toCharArray().length;
//Toast.makeText(context, "MsData char count : " + msdt , Toast.LENGTH_SHORT).show();;
alertDialogBuilder
.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
try {
Intent main = new Intent(context, MainActivity.class);
main.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP|Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(main);
} catch (Exception e) {
Log.d(TAG, "Error while starting Main activity from Dialog ! ");
}
}
})
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
Toast.makeText(context,"Your Order will be sent to "+ mail +" please check your inbox for comfirmation." , Toast.LENGTH_SHORT).show();
dialog.cancel();
}
})
.setNegativeButton("No",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
dialog.dismiss();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
【问题讨论】：
标签： android