Here we will create a simple app which displays a flash screen with a ProgressBar for 3 seconds before moving to MainActivity.
Step 1: Create a new project with name ProgressBar and package name com.apktutor.progressbar. Select File -> New -> New Project. Fill the forms and click “Finish” button.
Step 2: Open res -> layout -> xml (or) main.xml and add codes for layouts and widgets you want on main page.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical"> <TextView android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_width="wrap_content" android:text="You are on main page now"/> </LinearLayout>
Step 3: Add a new layout flash.xml and add following codes. This code shows a ProgressBar of Large style.
<?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" android:gravity="center_vertical|center_horizontal"> <ProgressBar style="?android:attr/progressBarStyleLarge" android:layout_height="wrap_content" android:layout_width="wrap_content"/> </LinearLayout>
Step 4: Open app -> java -> package and open MainActivity.java. Add following code in it. Here in onCreate we use Intent to move to FlashActivity.
package com.apktutor.progressbar;
import android.app.*;
import android.os.*;
import android.content.*;
public class MainActivity extends Activity
{
private Intent intent = new Intent();
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
intent.setClass(getApplicationContext(), FlashActivity.class);
startActivity(intent);
}
}
Step 5: Create a new java page FlashActivity.java. Here we use a TimerTask, and finish Activity after 3 seconds.
package com.apktutor.progressbar;
import android.app.*;
import android.os.*;
import java.util.*;
public class FlashActivity extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.flash);
Timer _timer = new Timer();
TimerTask timer = new TimerTask() {
@Override
public void run() {
finish();
}
};
_timer.schedule(timer, 3000);
}
}
Step 6: In AndroidManifest.xml, declare the FlashActivity.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.apktutor.progressbar" >
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:resizeableActivity = "true">
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".FlashActivity"
android:label="@string/app_name" >
</activity>
</application>
</manifest>
Output:
Now run the app. The flash screen with ProgressBar will show for 3 seconds before the main screen.