Android: Display/update clock in textview

I want to display and update a clock in my app. The time to be displayed is taken via a webservice.

Now how do I update the textview each second/minute? And also how do I keep the time synchroniz开发者_JAVA百科ed?

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Since your time is already taken from a webservice, you should keep taking it at a fixed rate (like every second, minute, etc.) using a Timer with a Service or an AsyncTask implementation.

You can update your TextView's content by

((TextView)findViewById(R.id.myTextView)).setText(formattedTime);

Where

• R.id.myTextView refers to the id of your TextView defined in your layout xml, and
• formattedTime is the time that you've got from the web service, and formatted it to be readable.

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You could have a thread running and have it sleep the required number of minutes/seconds (after being converted from ms). And then update this text through the thread via a handler that updates it for you. However; one thing you can potentially use is the system clock to do this for you (If they are the same).