Alertdialog Show = New Alertdialog.builder(this) Is Undefined

The app intercepts sms messages and displays a Dialog of the message. However I am unable to get my Dialog error resolved in my Test class. What am I doing wrong? (I've also inclu

Solution 1:

Do this:

AlertDialog.Builderbuilder=newAlertDialog.Builder(context);
builder.setTitle("Message")
    .setMessage(str)
    .setNeutralButton("OK", null);

AlertDialogdialog= builder.create();
dialog.show();

Instead of:

AlertDialogshow=newAlertDialog.Builder(this)
    .setTitle("Message")
    .setMessage(str)
    .setNeutralButton("OK", null)
    .show();

You have to create an instance of an AlertDialog.Builder first. Then you can build the Dialog with builder.create(). Then you can show the Dialog with .show().

Solution 2:

I'm new to android but found that sometimes you cant create an alert inside a class that is not an activity. you should then get the context directly and create the alert.

publicvoidshowAlert(String message){
    AlertDialog.Builderbuilder=newAlertDialog.Builder(this.getContext());
    builder.setTitle("Here is a message message from my activity")
        .setMessage(message)
        .setNeutralButton("OK", null);
    AlertDialogdialog= builder.create();
    dialog.show();
}

Solution 3:

You can't use dialog on BroadcastReceiver, so instead you better call an activity for the dialog box from the BroadcastReceiver,

add this code in your onReceive function :

@OverridepublicvoidonReceive(Context context, Intent intent) 
{
    Intenti=newIntent(context, {CLASSNAME}.class); 
    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
    context.startActivity(i);
}

fill the {CLASSNAME} with the dialog activity, heres my dialog activity :

package com.example.mbanking;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;


// ALERT DIALOG// Sources : http://techblogon.com/alert-dialog-with-edittext-in-android-example-with-source-code/publicclassAlertDialogActivityextendsActivity 
{

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);

    AlertDialog.Builderbuilder=newAlertDialog.Builder(this);
    builder
        .setTitle("Test")
        .setMessage("Are you sure you want to exit?")
        .setCancelable(false)
        .setPositiveButton("Yes", newDialogInterface.OnClickListener() 
        {
            publicvoidonClick(DialogInterface dialog, int id) 
            {
                dialog.cancel();
            }
        })
        .setNegativeButton("No", newDialogInterface.OnClickListener() 
        {
            publicvoidonClick(DialogInterface dialog, int id) 
            {
                dialog.cancel();
            }
        });
    AlertDialogalert= builder.create();
    alert.show();
}
}

where I got the answer ?, here : How do you use an alert dialog box in a broadcast receiver in android? thanks to Femi !!, I just spread the news :D,

greetings from Indonesia.

Solution 4:

Write this code instead. I tested it.

protectedvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);



    Button btn=(Button)findViewById(R.id.btnLogin);
    btn.setOnClickListener(newView.OnClickListener() {
        @OverridepublicvoidonClick(View view) {
            ShowMessage();
        }
    });
}

protectedvoidShowMessage(){
    AlertDialogshow=newAlertDialog.Builder(this)
            .setTitle("Message")
            .setMessage("khguh")
            .setNeutralButton("OK", null)
            .show();
}