Create an Android Lock Screen app.

Question

How to create a screen lock application that acts as a lock for an Android mobile phone. I found one, but it was poorly designed code, and if I pressed the physical home key, it would unlock, making the application pointless.

I came across a forum that says that in Android 4.x some method of blocking the function of the "Home" button was deleted.

However, I have a terrific idea to lock the screen, but there is no reason to start. If anyone has any knowledge on this, I would love to hear that.

Thanks to everyone :-)

Answer 1

Yes it is possible. This is a simple lock screen. Source code from GitHub

Creating an application that works like a lock does not make much difference, but as you said, for the problem with the Home key, I would suggest that you continue and develop the application as much as you need, and the only final area that you are stuck is therefore, we will try to find some difficult way to gain control of the home key and make it as an application for your lock application. It is not very difficult, but curiously difficult. I will send you a message if I find the source codes for accessing the home key.

PS:

Here is a tutorial to access your home key

I found somewhere that the house key has been redefined. Add these lines to the application manifest.

The next two lines will do the magic

<action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.HOME" /> <category android:name="android.intent.category.DEFAULT" /> 

and override this method in your activity

 @Override public void onAttachedToWindow() { super.onAttachedToWindow(); this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if(keyCode == KeyEvent.KEYCODE_HOME) { Log.i("Home Button","Clicked"); } if(keyCode==KeyEvent.KEYCODE_BACK) { finish(); } return false; } 

Keep in mind that I did not test these codes or methods, just tried to help you (you may find some flaws).

PS: based on the votes, which I can guarantee that my proposal works, and you can develop such an application using the above help :)