Android prompt user input dialog example

In this tutorial, we will enchance the previous AlertDialog example, to make it able to accept user input, just like aPromptDialog. More specific, this is a custom AlertDialog example.

See following steps :

1. Create a prompt dialog layout (XML file).
2. Attach the prompt dialog layout to AlertDialog.Builder.
3. Attach the AlertDialog.Builder to AlertDialog.
4. Done.

1 Android Layout Files

Two XML files, one for main screen, one for prompt dialog.

File : res/layout/main.xml

Markup

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
 
    <Button
        android:id="@+id/buttonPrompt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show Prompt Dialog" />

    <EditText
        android:id="@+id/editTextResult"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

    </EditText>
            
</LinearLayout>

File : res/layout/prompts.xml

Markup

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_root"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="10dp" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Type Your Message : "
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <EditText
        android:id="@+id/editTextDialogUserInput"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <requestFocus />

    </EditText>

</LinearLayout>

2. Activity

Read the comment and demo in next step, it should be self-explorary.

File : MainActivity.java

Java

package com.mkyong.android;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {

 final Context context = this;
 private Button button;
 private EditText result;

 public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  // components from main.xml
  button = (Button) findViewById(R.id.buttonPrompt);
  result = (EditText) findViewById(R.id.editTextResult);

  // add button listener
  button.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View arg0) {

    // get prompts.xml view
    LayoutInflater li = LayoutInflater.from(context);
    View promptsView = li.inflate(R.layout.prompts, null);

    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
      context);

    // set prompts.xml to alertdialog builder
    alertDialogBuilder.setView(promptsView);

    final EditText userInput = (EditText) promptsView
      .findViewById(R.id.editTextDialogUserInput);

    // set dialog message
    alertDialogBuilder
     .setCancelable(false)
     .setPositiveButton("OK",
       new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface dialog,int id) {
      // get user input and set it to result
      // edit text
      result.setText(userInput.getText());
         }
       })
     .setNegativeButton("Cancel",
       new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface dialog,int id) {
      dialog.cancel();
         }
       });

    // create alert dialog
    AlertDialog alertDialog = alertDialogBuilder.create();

    // show it
    alertDialog.show();

   }
  });
 }
}

3. Demo

Start it, the “main.xml” layout is display a button and edittext (result).

Click on the button, display a prompt dialog “prompts.xml” layout, type message “mkyong“, and click on the “OK” button.

User input “mkyong” will pass to the “main.xml” layout, edittext (result), and display it.

Source: http://www.mkyong.com/