Yes, it is possible. This is a simple lock screen Source Code from GitHub Creating an app that works like a lock is no big deal but as you said for Home key issue, I would suggest you go on and develop the App as much as you need and the only final area you … Read more
It can be changed programmatically (change to SpringBoard), but it won’t make the way to the (official) AppStore. So if you want to build an app that can change something like the lock screen wallpaper or the ring tone which you usually need the Settings app for, you have to publish your application via Cydia, … Read more
I have found snippets somewhere on internet few months ago, I have made changes and recently uploaded the working demo on my github account, You can have a look at this Note: It will disable “hardware” home button. I hope it will be helpfull !! Screenshots: It provides lockscreen in API 8 or above. Initial … Read more
The problem is that you are not satisfying the requirements to become master of the lock screen and control center, as I explain in my book. You should be seeing the modern (iOS 8) equivalent of this: The fact that you are not seeing it suggests that you are omitting one or more of the … Read more
My question was close to the mark for the reason why, but not quite. After reading through blog after blog, tutorial after tutorial, I finally found one that gave off a hint of what might be happening. Locked home screens. The keychain tutorials always left the accessibility settings for the keychain blank, so it would … Read more
Check this class : com.android.internal.policy.impl.LockScreen Referenced from here: Can you lock screen from your app? Also check code for enabling and disabling lock Screen in Android. (Referenced from here) KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE); KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE); For locking the screen use, lock.reenableKeyguard(); and for disabling the lock use, lock.disableKeyguard()
Use this code in your App, it works for me: DevicePolicyManager devicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE); ComponentName demoDeviceAdmin = new ComponentName(this, name of activity); devicePolicyManager.setPasswordQuality( demoDeviceAdmin,DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED); devicePolicyManager.setPasswordMinimumLength(demoDeviceAdmin, 5); boolean result = devicePolicyManager.resetPassword(“123456”, DevicePolicyManager.RESET_PASSWORD_REQUIRE_ENTRY); Toast.makeText(this, “button_lock_password_device…”+result, Toast.LENGTH_LONG).show();
There is a Broadcast Receiver Action ACTION_USER_PRESENT here is the implementation of ACTION_USER_PRESENT and ACTION_SHUTDOWN add this to your application Manifests <receiver android:name=”.UserPresentBroadcastReceiver”> <intent-filter> <action android:name=”android.intent.action.USER_PRESENT” /> <action android:name=”android.intent.action.ACTION_SHUTDOWN” /> </intent-filter> </receiver> to receive the actions import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; public class UserPresentBroadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context arg0, Intent intent) … Read more
You can actually prevent the status bar from expanding, without rooting phone. See this link. This draws a window the height of the status bar and consumes all touch events. Call the following code just after onCreate(). public static void preventStatusBarExpansion(Context context) { WindowManager manager = ((WindowManager) context.getApplicationContext() .getSystemService(Context.WINDOW_SERVICE)); Activity activity = (Activity)context; WindowManager.LayoutParams localLayoutParams … Read more
Another way to develop a LockScreen App is by using Views, let me explain it. First of all you can “disable” in some devices the System lock screen by disabling the KEYGUARD: ((KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE)).newKeyguardLock(“IN”).disableKeyguard(); You should put this line of code in your Service. After that you can launch an activity every time the screen goes … Read more