Develop Reference

How to set On back option for Navigation and Current activity

I have a created a app with List view when i click back button from home page it will toast a message and ask to exit or not. after i have implement a Navigation drawer and set open and close. but when i click back button from navigation go back and popup the toast which i set to hoe page.
#Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else{
super.onBackPressed();
}
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to Exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
AdminHome.super.onBackPressed();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
how to stop the toast message when i click back from navigation bar and set toast from home page.

hi You can change your code like this
#Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to Exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
AdminHome.super.onBackPressed();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
}

Put the AlertDialog code in else block.

Put your alertdialog inside else of your condition
#Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to Exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
super.onBackPressed();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
}

Why crash my android app without any exception on showing an alert dialog?

I'm currently developing an android app. In this app should an alert dialog ask for an username and a password. The problem is, that the show-method causes a crash of the app. So I have tried to show a simple alert dialog; but there was the same problem. The wired this is, that the app closes without any exception.
Here is the code of the showLoginWindow:
public class MainScreen extends AppCompatActivity {
// other code
private void showLoginWindow(boolean falseLogin){
LayoutInflater layoutInflater = LayoutInflater.from(this);
View promptView = layoutInflater.inflate(R.layout.login, null);
TextView tv = (TextView) promptView.findViewById(R.id.Message3);
if(falseLogin) tv.setText("Falscher Benutzername oder falsches Passwort. Bitte wiederholen.");
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
alertDialogBuilder.setView(promptView);
final EditText uName = (EditText) promptView.findViewById(R.id.username);
final EditText password = (EditText) promptView.findViewById(R.id.password);
// setup a dialog window
alertDialogBuilder.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
login(uName.getText().toString(), password.getText().toString());
}
});
// create an alert dialog
AlertDialog alert = alertDialogBuilder.create();
alert.show();
}
}
And here is the code of the simple dialog (also in MainScreen):
private void testIt(){
AlertDialog.Builder builder;
builder = new AlertDialog.Builder(this, android.R.style.Theme_Material_Dialog_Alert);
builder.setTitle("test")
.setMessage("test dialog")
.setPositiveButton("yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
})
.setNegativeButton("no", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
I hope you can help me and sorry for my bad language.

submit EditText and display result in AlertDialog TextView

I am very new to Java and I'm trying to keep things simple. Why doesn't this work? I have an XML layout with a EditText field and a Submit Button. I want to press it, an AlertDialog to pop up with the TextView of what I inputted into the EditText. What I tried keeps crashing:
//CustomAlertDialogPopUp
public void submitButton(View v) {
LayoutInflater inflater = getLayoutInflater();
View alertLayout = inflater.inflate(R.layout.alertXML, null);
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Alert");
alert.setView(alertLayout);
AlertDialog dialog = alert.create();
dialog.show();
EditText text1 = (EditText)findViewById(R.id.inputText);
TextView text2 = (TextView)findViewById(R.id.alertText);
String result = text1.getText().toString();
text2.setText(result);
}
Sorry if I sound stupid! Like I say, super new.

If you want to keep it simple, this will work:
For custom AlertDialog view you can refer to this question
public void submitButton(View v){
new AlertDialog.Builder(this)
.setTitle("Message")
.setMessage(text1.getText().toString())
.setPositiveButton("Dismiss", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
})
.show();
}

Hyperlinking the Phone number in AlertDialog of Android

I have an AlertDialog having the text "For more information, Please Call 1-800-200-1000".
Here is my Code for the Alert Dialog Display while clicking on the ListView Item :
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
final SpannableString s = new SpannableString("1-800-200-1000");
Linkify.addLinks(s, Linkify.ALL);
ListView.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
builder.setMessage("For more information, Please Call "+s)
.setCancelable(true)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
}});
Here i wish to hyperlink the "1-800-200-1000" and while clicking on this, another dialog for call function should be implemented.
Here is my AlertDialog for Call Function:
final Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Do you want to Call?");
builder.setCancelable(false);
builder.setPositiveButton("Call", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent dial = new Intent();
dial.setAction("android.intent.action.DIAL");dial.setData(Uri.parse("tel:"+ Phone));
startActivity(dial);
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Toast.makeText(getApplicationContext(),"Activity will continue",Toast.LENGTH_LONG).show();
dialog.cancel();
}
});
AlertDialog dialog = builder.create();
dialog.show();
Please help me in two problems:
1.How to hyperlink the Phone number in the First Dialog?
2.how to embed the Call AlertDialog while clicking the Hyperlinked Phone Number?
Thanks in advance.

try this one:
Spannable spans = (Spannable) text;
ClickableSpan clickSpan = new ClickableSpan() {
#Override
public void onClick(View widget) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://"+ url));
}
public void updateDrawState(TextPaint ds) {
//override link-centric text appearance
}
};
int index = (text.toString()).indexOf(url);
spans.setSpan(clickSpan, index, url.length() + index,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

How to Set icon(image) in DialogBox While Click in Button Event

I created a Button,While i Click that Button a new Dialog Box is Displayed.In that dialog Box i have set icon and text.text is Displayed but icon(image) is not displayed in dialog Box.
Here my Coding
Button btnteam_westernbulldogs=new Button(this);
btnteam_westernbulldogs.setId(team_westernbulldogsid);
btnteam_westernbulldogs.setBackgroundResource(R.drawable.team_westernbulldogs);
public void onClick(View v){
createbtnteam_westernbulldogs();
}
});
public void createbtnteam_westernbulldogs()
{
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setIcon(R.drawable.team_westernbulldogs);
alertDialog.setMessage("What kind of Banner do you Want to Create?");
alertDialog.setButton("Text", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
createText();
}
alertDialog.setIcon(R.drawable.icon);
alertDialog.show();
} });

Try this..
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to exit?")
.setIcon(R.drawable.icon)
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
MyActivity.this.finish();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
dialog.cancel();
}
});
AlertDialog alert = builder.create();

public void createbtnteam_westernbulldogs()
{
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setIcon(R.drawable.team_westernbulldogs);
alertDialog.setTitle("What kind of Banner do you Want to Create?");
alertDialog.setButton("Text", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
createText();
}
alertDialog.setIcon(R.drawable.icon);
alertDialog.show();
} });

You must call setTitle with non-empty string!
Icon is displayed only if there's also title.