How to get the this window in Android

I want to to show the current city & weather in screen like this

I don't have good knowledge in android widget.I want to do one app.Like below picture,.I have tried like this in manifest file :

<activity android:name=".WeatherActivity" android:theme="@android:style/Theme.Light.NoTitleBar">
</activity>

I really don't know what I want to do. I want to setup the开发者_StackOverflow社区 size. How we can do? Another thing I want to get the current city from phone?

I think this will answer all your questions about the widget and this will answer all your questions about getting a user's location.