Android Examples: Android using Analog Clock and Digital Clock

An Android Analog and Digital Clock widgets are used to display Clock in Analog and Digital format. Since the DigitalClock package is deprecated we are going to use TextClock to display Digital Clock.

Creating Project:

Make sure you have properly setup the Android SDK, AVD for Testing the Application. Create a New project in Eclipse IDE with the package as “com.learn2crack.clock“. Create the Main Activity as “MainActivity” and the main Layout as “activity_main“.

Creating Layout:

The Main layout for our project is “activity_main” which has a Button widget to switch between AnalogClock and TextClock widgets.

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    tools:context=".MainActivity" >

     <TextView

        android:id="@+id/welcome"

        android:layout_gravity="center"

        android:textSize="20sp"

        android:text="Android Clock"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

     <Button

        android:id="@+id/btn"

        android:layout_gravity="center"

        android:textSize="20sp"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

    <TextClock

        android:id="@+id/clock"

        android:layout_gravity="center"

        android:textSize="40sp"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/hello_world" />

    <AnalogClock

        android:id="@+id/aclock"

        android:layout_gravity="center"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/hello_world" />

</LinearLayout>

Creating Activity:

First we are importing the TextClock and AnalogClock. When the button is pressed it hides one widget and enables other widget.

`MainActivity.java`

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextClock;

import android.widget.AnalogClock;

import android.app.Activity;

public class MainActivity extends Activity {

  TextClock clock;

  AnalogClock aclock;

  Button btn;

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    clock = (TextClock)findViewById(R.id.clock);

    aclock = (AnalogClock)findViewById(R.id.aclock);

    btn = (Button)findViewById(R.id.btn);

    btn.setText("Show Analog Clock");

    aclock.setVisibility(View.INVISIBLE);

      btn.setOnClickListener(new View.OnClickListener() {

    @Override

    public void onClick(View arg0) {

      // TODO Auto-generated method stub

      btn.setText("Show Digital Clock");

      aclock.setVisibility(View.VISIBLE);

      clock.setVisibility(View.INVISIBLE);

      btn.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View arg0) {

          // TODO Auto-generated method stub

        onCreate(null);

        }

      });

    }

  });

  }

}

`Creating Manifest:`

No other special Permissions are required for our project.

`AndroidManifest.xml`

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.learn2crack.clock"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="17"

        android:targetSdkVersion="18" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.learn2crack.clock.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>

    </application>

</manifest>