Hello, this is Chris talking, your fellow Time Keeper (yeah, I was nicknamed) and this is my tutorial on how to build a simple, lightweight analog clock!
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This guide assumes that you have successfully set up the Android SDK, ADT, Eclipse, some basic Java knowledge and image editing skills.
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Let's start!
Go to the menu bar and click File > New > Android Project
Give your project a name, such as "XDA Devs Clock". Anything you prefer. This isn't going to affect the final app.
Next, select Android 1.6 as the build target. Analog clocks don't require anything special.
Now it's time to create the package name. I usually make mine like "com.xda.clock.chris".
Untick the "Create Activity" checkbox.
Info: We don't need to create an Activity because we are making a widget. Widgets don't have Activities, otherwise, they would be shown in the app drawer.
Click Finish and Eclipse will set up the project.
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Next up, you need to make 3 images for the clock:
Use your incredible Photoshop/GIMP/Illustrator skills to make your awesome clock!
Few tips:
All lower case. It is extremely important or else you will get an error!
Also, create an app icon. You need to make 3 different ones for every screen size.
Save them with the name "ic_launcher.png" and overwrite the images that are already in the project's respective folders.
________________________________________________________________
Following, we gotta put them to our app.
So, first, right-click res > New > New folder and name it "drawable".
Drag your images you created previously into there.
Now, let's make the layout of the clock.
Go to res > layout > main.xml
Go to the main.xml tab (at the bottom) and delete the TextView block. Next, change the layout from Linear to Relative.
Now, we will add the clock's code.
So, what did we do there?
The final xml is this:
_______________________________________________________________
Next, we need to tell Android that what we are actually doing is a widget.
Right click res and create a folder named "xml".
Right clock xml > New > Android XML file
Change the Resource Type to AppWidgetProvider and give it a name such as "widget_config.xml". Lower case!
Delete everything and paste this in:
There we set how many rows the widget will take. The calculation method is
74 * [number of rows] - 4
We want the widget to be 2*2 so the width is 146dip and the height is also 146dip. But we'll change it to 140 to make it a little bigger.
Then we set an update period... which actually doesn't work below 30 minutes. It's a bug in Android and last, we gave it a layout, which we made previously (main.xml).
____________________________________________________________
Now, we must declare the widget in the manifest.xml with a <receiver> element.
Open the manifest xml and delete the <activity> block. As said previously, we won't have any activity.
Inside the <application> add this piece of code:
The android:name is the class we are going to create in a few minutes.
The label is the name that will be shown in the widget picker of your homescreen. Then we specified the update and linked the widget_config.xml
The final xml is:
_______________________________________________________________
Now it's time to create the Clock_Actions class.
Right click the package > New > Class
Give it the above name.
Delete everything and paste this in:
Change the package name to your own after pasting.
So here, we set up the update, the remote views and the pending intent which redirects you to the Desk Clock app. Because different phones have different Desk Clock package names, we set up a method to handle that.
Many thanks to sndytime. Got the code from his post here.
____________________________________________________________
Next up...nothing! Our clock is done! We just have to export it.
Right click the project > Android tools > Export signed application
Choose next, select Create new keystore > click browse and give it a name.
Create a password and click next.
In alias put whatever you want. I usually put "chris95x8"
Enter your password again and put, like, 100 year for validity. You get the rest.
Click Next, browse and enter a name for the apk.
Click Finish and congrats on your first analog clock! Yay!
If you have done everything right it should work. Otherwise, comment here on the thread.
*Sorry for big images
______________________________________________________________
I hope to see some clock on the Themes & Apps section soon. Good luck everyone!
______________________________________________________________
This guide assumes that you have successfully set up the Android SDK, ADT, Eclipse, some basic Java knowledge and image editing skills.
_______________________________________________________________
Let's start!
Go to the menu bar and click File > New > Android Project
Give your project a name, such as "XDA Devs Clock". Anything you prefer. This isn't going to affect the final app.
Next, select Android 1.6 as the build target. Analog clocks don't require anything special.
Now it's time to create the package name. I usually make mine like "com.xda.clock.chris".
Untick the "Create Activity" checkbox.
Info: We don't need to create an Activity because we are making a widget. Widgets don't have Activities, otherwise, they would be shown in the app drawer.
Click Finish and Eclipse will set up the project.
________________________________________________________________
Next up, you need to make 3 images for the clock:
- The dial (which is the clock's background)
- The hour's hand
- The minute's hand
Use your incredible Photoshop/GIMP/Illustrator skills to make your awesome clock!
Few tips:
- Make the canvas 300*300 pixels
- Make the dial with 10% padding
- To easily make the hands, keep the dial background and draw the hour's and minute's hand as they were at position zero (Hour at 12 o'clock and minute at zero). Erase the dial and save each hand image
- hand_dial.png
- hand_minute.png
- hand_hour.png
All lower case. It is extremely important or else you will get an error!
Also, create an app icon. You need to make 3 different ones for every screen size.
- HDPI - 72*72 px
- MDPI - 48*48 px
- LDPI - 36*36 px
Save them with the name "ic_launcher.png" and overwrite the images that are already in the project's respective folders.
________________________________________________________________
Following, we gotta put them to our app.
So, first, right-click res > New > New folder and name it "drawable".
Drag your images you created previously into there.
Now, let's make the layout of the clock.
Go to res > layout > main.xml
Go to the main.xml tab (at the bottom) and delete the TextView block. Next, change the layout from Linear to Relative.
Now, we will add the clock's code.
Code:
<AnalogClock
android:id="@+id/analogClock1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:dial="@drawable/hand_dial"
android:hand_minute="@drawable/hand_minute"
android:hand_hour="@drawable/hand_hour"/>So, what did we do there?
- We gave the item an id
- We put it in the middle of the screen
- We redirected the drawables to the respective hand and dial
The final xml is this:
Code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<AnalogClock
android:id="@+id/analogClock1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:dial="@drawable/hand_dial"
android:hand_minute="@drawable/hand_minute"
android:hand_hour="@drawable/hand_hour"/>
</RelativeLayout>_______________________________________________________________
Next, we need to tell Android that what we are actually doing is a widget.
Right click res and create a folder named "xml".
Right clock xml > New > Android XML file
Change the Resource Type to AppWidgetProvider and give it a name such as "widget_config.xml". Lower case!
Delete everything and paste this in:
Code:
<appwidget-provider
xmlns:android="http://schemas.android.com/apk/res/android"
android:minWidth="140dip"
android:minHeight="140dip"
android:updatePeriodMillis="0"
android:initialLayout="@layout/main"/>There we set how many rows the widget will take. The calculation method is
74 * [number of rows] - 4
We want the widget to be 2*2 so the width is 146dip and the height is also 146dip. But we'll change it to 140 to make it a little bigger.
Then we set an update period... which actually doesn't work below 30 minutes. It's a bug in Android and last, we gave it a layout, which we made previously (main.xml).
____________________________________________________________
Now, we must declare the widget in the manifest.xml with a <receiver> element.
Open the manifest xml and delete the <activity> block. As said previously, we won't have any activity.
Inside the <application> add this piece of code:
Code:
<receiver android:name=".Clock_Actions" android:label="XDA Analog Clock">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data android:name="android.appwidget.provider" android:resource="@xml/widget_config" />
</receiver>The android:name is the class we are going to create in a few minutes.
The label is the name that will be shown in the widget picker of your homescreen. Then we specified the update and linked the widget_config.xml
The final xml is:
Code:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.xda.clock.chris"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="4" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<receiver android:name=".Clock_Actions" android:label="XDA Analog Clock">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data android:name="android.appwidget.provider" android:resource="@xml/widget_config" />
</receiver>
</application>
</manifest>_______________________________________________________________
Now it's time to create the Clock_Actions class.
Right click the package > New > Class
Give it the above name.
Delete everything and paste this in:
Code:
package com.xda.clock.chris;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.widget.RemoteViews;
public class Clock_Actions extends AppWidgetProvider{
public void onReceive(Context context, Intent intent)
{
String action = intent.getAction();
PendingIntent pendingIntent;
if (AppWidgetManager.ACTION_APPWIDGET_UPDATE.equals(action))
{
RemoteViews views = new RemoteViews(context.getPackageName(),
R.layout.main);
pendingIntent = PendingIntent.getActivity(context, 0,getAlarmPackage(context), 0);
views.setOnClickPendingIntent(R.id.analogClock1, pendingIntent);
AppWidgetManager
.getInstance(context)
.updateAppWidget(
intent.getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS),
views);
}
}
public Intent getAlarmPackage(Context context)
{
PackageManager packageManager = context.getPackageManager();
Intent AlarmClockIntent = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_LAUNCHER);
String clockImpls[][] = {
{ "Standard Alarm", "com.android.alarmclock",
"com.android.alarmclock.AlarmClock" },
{ "HTC Alarm ClockDT", "com.htc.android.worldclock",
"com.htc.android.worldclock.WorldClockTabControl" },
{ "Standard Alarm ClockDT", "com.android.deskclock",
"com.android.deskclock.AlarmClock" },
{ "Froyo Nexus Alarm ClockDT",
"com.google.android.deskclock",
"com.android.deskclock.DeskClock" },
{ "Moto Blur Alarm ClockDT",
"com.motorola.blur.alarmclock",
"com.motorola.blur.alarmclock.AlarmClock" },
{ "Samsung Galaxy S", "com.sec.android.app.clockpackage",
"com.sec.android.app.clockpackage.ClockPackage" } };
boolean foundClockImpl = false;
for (int i = 0; i < clockImpls.length; i++)
{
String packageName = clockImpls[i][1];
String className = clockImpls[i][2];
try
{
ComponentName cn = new ComponentName(packageName, className);
packageManager.getActivityInfo(cn,PackageManager.GET_META_DATA);
AlarmClockIntent.setComponent(cn);
foundClockImpl = true;
} catch (NameNotFoundException nf)
{
}
}
if (foundClockImpl)
{
return AlarmClockIntent;
}
else
{
return null;
}
}
}Change the package name to your own after pasting.
So here, we set up the update, the remote views and the pending intent which redirects you to the Desk Clock app. Because different phones have different Desk Clock package names, we set up a method to handle that.
Many thanks to sndytime. Got the code from his post here.
____________________________________________________________
Next up...nothing! Our clock is done! We just have to export it.
Right click the project > Android tools > Export signed application
Choose next, select Create new keystore > click browse and give it a name.
Create a password and click next.
In alias put whatever you want. I usually put "chris95x8"
Enter your password again and put, like, 100 year for validity. You get the rest.
Click Next, browse and enter a name for the apk.
Click Finish and congrats on your first analog clock! Yay!
If you have done everything right it should work. Otherwise, comment here on the thread.
*Sorry for big images
______________________________________________________________
I hope to see some clock on the Themes & Apps section soon. Good luck everyone!
Last edited:
