Alert Dialog Tutorial With Example In Android Studio
Alert Dialog in an android UI prompts a little window to
settle on choice on versatile screen. Once in a while before making a choice it
is required to give an alert to the client without moving to next action. To
take care of this issue alert dialog came into training. For example you have
seen this sort of alert when you endeavor to leave the App and App request that
you confirm exiting.
AlertDialog.Builder Components Used In Alert Dialog |
AlertDialog.Builder is utilized to make an interface for
Alert Dialog in Android for setting like alert title, message, image, button,
button onclick usefulness and so on.
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AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
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1.setTitle(CharSequence title) – This segment is utilized to set the title of
the alert dialog. It is optional part.
// Setting Alert Dialog Title alertDialogBuilder.setTitle("Confirm Exit..!!!"); |
2. setIcon(Drawable symbol) – This part include symbol before the title. You
should spare image in drawable symbol.
// Icon Of Alert Dialog
alertDialogBuilder.setIcon(R.drawable.question); |
3. setMessage(CharSequence message) – This part shows the required message in the alert
dialog.
// Setting Alert Dialog Message
alertDialogBuilder.setMessage("Are you sure,You want to exit"); |
4. setCancelable(boolean cancelable) – This segment has boolean esteem i.e
genuine/false. Whenever set to false it permits to drop the dialog box by
clicking on territory outside the dialog else it permits.
alertDialogBuilder.setCancelable(false); |
5. setPositiveButton(CharSequence content,
DialogInterface.OnClickListener audience)
– This segment include positive button and further with this client
confirm he needs the alert dialog question to occur.
alertDialogBuilder.setPositiveButton("yes", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface arg0, int arg1) { finish(); } }); |
6. setNegativeButton(CharSequence content,
DialogInterface.OnClickListener audience) – This segment include
negative button and further with this client confirm he doesn't need the alert
dialog question to occur.
alertDialogBuilder.setNegativeButton("No", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this,"You clicked over No",Toast.LENGTH_SHORT).show(); } }); |
7. setNeutralButton(CharSequence content,
DialogInterface.OnClickListener audience)
– This segment basically include another button and this button engineer
can set some other onclick usefulness like drop button on alert dialog.
alertDialogBuilder.setNeutralButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(getApplicationContext(),"You clicked on Cancel",Toast.LENGTH_SHORT).show(); } }); |
Alert Dialog Example In Android Studio |
The following is the example of Alert Dialog in which the
usefulness of Alert Dialog is defined over button click. In this example we
have utilized a straightforward button and on that button tap the alert dialog
window will show up.
Beneath you can download code, see final yield and well
ordered clarification of Alert Dialog example in Android Studio.
Stage 1: Create
another venture and name it AlertDialogExample.
Stage 2: Open
res - > layout - > activity_main.xml (or) main.xml and include following
code:
Here we include the button UI snap of which alert dialog
will show up. We likewise utilized textview for asking client to tap on button.
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.alertdialogexample.MainActivity">
<Button android:text="@string/exit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/button" android:onClick="exit" android:textStyle="normal|bold" style="@style/Widget.AppCompat.Button.Colored" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="131dp"/>
<TextView android:text="@string/click_over_button_to_exit" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="68dp" android:id="@+id/textView2" android:layout_above="@+id/button" android:layout_centerHorizontal="true" android:textSize="18sp" android:textStyle="normal|bold" android:gravity="center" /> </RelativeLayout>
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Stage 3 : Now
open application - > java - > package - > MainActivity.java and
include the underneath code.
In this progression right off the bat AlertDialog.Builder is
utilized to make an interface like setting alert title, message, image, button,
button onclick usefulness and so forth.
Important Note:
Add an image to the drawable organizer before setting the alert dialog
symbol.
package com.example.alertdialogexample;
import android.content.DialogInterface; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void exit(View view){ AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this); // Setting Alert Dialog Title alertDialogBuilder.setTitle("Confirm Exit..!!!"); // Icon Of Alert Dialog alertDialogBuilder.setIcon(R.drawable.question); // Setting Alert Dialog Message alertDialogBuilder.setMessage("Are you sure,You want to exit"); alertDialogBuilder.setCancelable(false);
alertDialogBuilder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface arg0, int arg1) { finish(); } });
alertDialogBuilder.setNegativeButton("No", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this,"You clicked over No",Toast.LENGTH_SHORT).show(); } }); alertDialogBuilder.setNeutralButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(getApplicationContext(),"You clicked on Cancel",Toast.LENGTH_SHORT).show(); } });
AlertDialog alertDialog = alertDialogBuilder.create(); alertDialog.show(); } }
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OutPut :-
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