Shulou(Shulou.com)05/31 Report--

This article mainly introduces the relevant knowledge of "how to achieve keyboard operation in Android". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "how to achieve keyboard operation in Android" can help you solve the problem.

Generally speaking, there are three functions for Android keyboard operation:

OnKeyDown, onKeyUp, on, onKeyMultiple

See the following Android keyboard operation code:

Import android.app.Activity

Import android.app.ProgressDialog

Import android.os.Bundle

Import android.view.KeyEvent

Import android.view.Menu

Import android.view.MenuItem

Import android.widget.TextView

Public class TestProgress extends Activity {

Private ProgressDialog progress = null

@ Override

Public void onCreate (Bundle savedInstanceState) {

Super.onCreate (savedInstanceState)

SetContentView (R.layout.main)

}

@ Override

Public boolean onCreateOptionsMenu (Menu menu) {

Super.onCreateOptionsMenu (menu)

Menu.add (0, Menu.FIRST+1, 1, "Open Progress")

Menu.add (0, Menu.FIRST+2, 2, "Exit")

Return true

}

@ Override

Public boolean onOptionsItemSelected (MenuItem item) {

Super.onOptionsItemSelected (item)

Switch (item.getItemId ())

{

Case Menu.FIRST + 1:

{

Progress = new ProgressDialog (this)

Progress.setTitle ("Progressgiving!")

Progress.setMessage ("Please wait for the operation...")

Progress.setCancelable (true)

Progress.show ()

/ / progress = ProgressDialog.show (this, "Progress!"

"Please wait for operation...")

Break

}

Case Menu.FIRST + 2:

{

Finish ()

Break

}

}

Return true

}

@ Override

Public boolean onKeyDown (int keyCode, KeyEvent event) {

/ / TODO Auto-generated method stub

Super.onKeyDown (keyCode, event)

SetTitle ("you pressed key:" + String.valueOf (keyCode))

Return true

}

@ Override

Public boolean onKeyMultiple (int keyCode, int repeatCount

KeyEvent event) {

/ / TODO Auto-generated method stub

Super.onKeyMultiple (keyCode, repeatCount, event)

TextView tv = (TextView) this.findViewById (R.id.mainview)

Tv.setText ("you have press key: [" + String.valueOf (keyCode) + "]

For: "+ String.valueOf (repeatCount) +" Times! ")

Return true

}

@ Override

Public boolean onKeyUp (int keyCode, KeyEvent event) {

/ / TODO Auto-generated method stub

Super.onKeyUp (keyCode, event)

SetTitle ("you release key:" + String.valueOf (keyCode))

Return true

}

}

This is the end of the introduction on "how to operate the keyboard in Android". Thank you for your reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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