I would like to make it so, by a click of a button, there is a popup message.
Right now the popup comes as soon as I open the app.
BTW the button I want to trigger the popup is the about button in main.xml
Here is my main.xml (with the layout stuff):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#3DE400"
android:orientation="vertical" >
<!-- background originally #d78a00 -->
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="60dp"
android:fontFamily="sans-serif-condensed"
android:paddingLeft="10dp"
android:text="Sample App"
android:textColor="#FFF"
android:textSize="60sp" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-condensed"
android:paddingLeft="10dp"
android:text="@string/creator"
android:textColor="#FFF"
android:textSize="20dp" />
<Button
android:id="@+id/about"
android:layout_width="123dp"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
android:background="@android:color/transparent"
android:fontFamily="sans-serif-condensed"
android:gravity="left"
android:paddingLeft="10dp"
android:text="@string/about"
android:textColor="#FFF"
android:textSize="40dp"
android:onClick="show" />
</LinearLayout>
Here is my MainActivity.java:
package com.pranavsanghvi.sampleappv4;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.view.Menu;
import android.widget.Toast;
import android.content.DialogInterface;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);
alert.setTitle("About");
alert.setMessage("Sample About");
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick (DialogInterface dialog, int id) {
Toast.makeText (MainActivity.this, "Success", Toast.LENGTH_SHORT) .show();
}
});
alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Toast.makeText(MainActivity.this, "Fail", Toast.LENGTH_SHORT) .show();
}
});
alert.show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
If you want to show popup on about button click add the following in onCreate()
Button aboutButton = (Button) findViewById(R.id.about);
aboutButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
alert.show();
}
});
just remove alert.show();
from onCreate();
update :-
Are you getting alert can't be resolved ? If so then either make alert global ie declare it outside onCreate()
public class MainActivity extends Activity {
AlertDialog.Builder alert;
@Override
protected void onCreate(Bundle savedInstanceState) {
// code
alert = new AlertDialog.Builder(MainActivity.this);
// code
or make it final so that it is
final AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);
also remove alert.show();
which is in onCreate();
First, declare your alert and button in MainActivity:
public class Mainactivity extends Activity {
private AlertDialog.Builder alert;
private Button btAbout;
//rest of the code
}
Then, in onCreate(), create your alert as you did, except this line:
alert.show(); // <--- remove this line as not to show the alert immediately
Because you've declared global alert, remember to also remove AlertDialog.Builder here, so instead of:
AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);
alert.setTitle("About");
//rest of the code
you should have:
alert = new AlertDialog.Builder(MainActivity.this);
alert.setTitle("About");
//rest of the code
Next, get the handle to your about button:
btAbout = (Button) findViewById(R.id.about);
Set onClickListener to button:
btAbout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//when this button is clicked, show the alert
alert.show();
}
});
All of this is in onCreate(). Now when button is clicked, your alert will be displayed.
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