Now, modern Android phones and tablets are coming with built-in lock functionality to protect your phone from unauthorized use. In this digital era, everyone is taking advantage of the phone's built-in lock feature and protecting them with fingerprint, PIN, pattern, or face-lock (or all of them). However, sometimes you may need to add extra protection to your apps that hold and access credentials (sensitive) and private information. It helps you protect your data from unauthorized use if other persons (kids, friends, or partners) use your Android phone for any reason.
Some of the phone apps come with a built-in lock feature, and for some apps, you need to install a third-party app on your device to apply a lock on them. In addition, the processes to apply lock apps are different based on the phone operating system you are using (Android or iOS) and the phone model (version).
For Android 10 and Android 9.0 Pie (using built-in device feature)
May 10, 2017 Hi, I am trying to change the lock screen background image but I cannot figure out how to view this in the android studio emulator. When the emulator first loads up it shows the lock screen for a second then it goes straight to the home screen then finally my app. I click the on/off button twice but it goes to the camera instead. To verify emulator connectivity, use the following steps: Launch the emulator from the Android Device Manager (select your virtual device and click Start ). Open a command prompt and go to the folder where adb is installed. If the Android SDK is installed at its default location, adb is located at C: Program Files (x86) Android android-sdk. Certain custom ROMs such as the security-focused Copperhead OS allow you to set a separate encryption and lock screen. Shell terminal emulator. If you are on a version of Android prior to 5.0.
Apply lock on the app screen to keep it un-access until you unlock.
- Launch the Settings app and Security or Biometrics (Fingerprint, face, or password).
- Scroll down to the bottom of the Settings screen, look for the App lock, and tap on it.
- It will ask you to set a privacy password to use App lock. Click on Set password.
- Now, enter and set the password for the app you want to lock. Then, once again, please enter the same password and verify it.
- If it asks for any security question, enter any one of them and tap on the Done option.
- Now select the apps on which you want to apply your lock to protect from unauthorized use.
- Click on the Lock button.
Now, the lock app is successfully installed on your device. Therefore, you can lock your app with a password, and no one can access that particular app without entering the same password on the app's lock screen. If you want to change your password or want to turn off the app lock, click on the Settings > Biometrics (Fingerprint, face, or password) > Privacy password > enter your password and tap on Change password or Turn off password.
For Android 8.0 Oreo and 7.0 Nougat
If you are using some older version of an Android smartphone, the process and steps to lock apps on them are a bit different.
- Launch the device Settings app and then click on the Lock screen and security.
- Now, look for the Other security settings option and tap on it.
- Enable the Pin windows toggle button to enable screen pinning.
- Enable the Use screen lock type to unpin the toggle button.
- Now, select the Overview option and then hover over the app window which you want to lock.
- Tap on the thumbtack icon available at the lower-right of the screen and then click on Start.
- Select and hold the Back and Overview icons to unpin the window.
- Finally, enter your pin, pattern, password, or scan your biometric security option to unpin the app.
Locking Apps using third-party apps on Android
Several third-party mobile tools and security master lock apps are available that protect your apps and files from unauthorized use. If you want to protect your personal data, you need to download and install it from the Google Play Store and set it up on your smartphone. you can protect any by implementing a password, pin, pattern, or even using biometric security. When you try to open your locked or protected apps, you have to go through your password, and unless you enter the correct password, the app can't get launched.
However, keep in mind that these apps ask to allow some permission and system privileges while installation to get function. So it is suggested to use only trusted apps.
Norton App Lock
Norton App Lock is a trusted tool for protecting apps and other private files stored on your smartphone. The app is free to download and use from Google Play Store. The app facilitates you to lock your apps with either passcode or pattern drowns lock on the screen. Once you install and set up the Norton App Lock on your smartphone, you can easily protect your apps. Just launch the Norton App Lock and draw an unlock pattern, or you can also use a passcode to unlock the app. Unfortunately, if you forget your pattern or passcode, there is also an option to reset them using your Google account linked with your Android phone.
To lock any apps, launch the Norton App Lock and select the lock next to the app you want to password-protect. Once the app gets locked, only the password that you created earlier will allow it to access.
When we tried it out after locking the app, we navigated to the home screen and started one of the locked apps. The lock appears over the app and prevents it from open. Therefore, an unknown person cannot open and access it without PIN, pattern, or biometrics. You can only unlock the app by providing the correct PIN or pattern.
App Lock from Keepsafe
Keepsafe's App Lock app doesn't allow taking any screenshots while using it. So, all we explain in the text that we observe while using it. When you download and install it, the setup wizard asks you about the type of locks such as PIN, pattern, or fingerprint. If you are already using your fingerprint to unlock your phone, you don't need to register it again to protect or lock any app available on your smartphone. It is because the app uses the fingerprint already stored in your device. It builds trust while using it as the Keepsafe's App Lock can't send your fingerprint to the app creator.
The App Lock asks you about your email address for security, but you can even skip this option if you want. The app takes you to the system settings, where you have to grant access to the data usage. Return to App Lock and select the app you want to lock and protect from unauthorized access.
Create a user or guest account
If you do not want to use any third-party app locker apps from Play Store or any other source to lock apps, there is an alternate option known as the device operating system. Create a second user or a guest account on your smartphone. In this way, you can also be able to protect your apps. The second user or guest account user is the temporary user, and they can't use your main profile. They can't be able to make phone calls, send SMS messages, or access any data present on your phone, including your apps. They are only allowed to install apps and store their data on their phones. You can create it via a button located above the quick settings on the top. If you set it up as a user and not as a guest account, you can even pass the phone to another person to store their data on it.
Locking Apps on iOS
Apple doesn't allow and concession any third-party apps to install on iOS as Google does for Android. So you couldn't find any standard locking tools in the App Store. Instead, you have to trust and work on individual apps themselves. However, many apps on iOS which can store any sensitive information offer an additional protection option to you.
Along with the security that WhatsApp has, it also protects your messages from exposure to unknown people. For this, you have to go to the main screen and click on Settings app. After that, go to Accounts > Privacy & Screen Lock and activate Touch ID or Face ID to prevent your conversations from being accessed.
One other example is Apple's Notes app for its iPhone. It allows you to lock each note by clicking the Share button (present inside the note) or long-pressing on a note and choosing Lock Note. In addition, you can use your PIN code, Touch ID, or Face ID to lock Notes. You can set it via Notes in the iOS Settings app.
I am a complete nOOb to Android programming and trying my hands at it for the first time by going through the tutorials. The problem is that I have created multiple emulators using android 4.4.2 API and none of them show anything but blank screen..I tried an AVD with Google API 19..thats not working either..Can anyone please guide me figuring out what’s wrong with it..Thanks in advance
I had the same problem, running on a Mac Book Pro bought in 2011.
I solved it by selecting “Use Host GPU” as the emulation option at the bottom of the “Create…” screen.
Answer：
Mac Users: Unfortunately, if you have an older Mac (late 2009 for example) and are using Yosemite, you cannot use HAXM for 64 bit architecture. According to the release notes on HAXM:
HAXM driver does not support emulating a 64 bit system image on Intel systems based on Core microarchitecture (Core, Core2 Duo etc.). All systems based on Nehalem and beyond are supported. (Corei3, Core i5 and Core i7 machines).
I spent a day trying to figure this problem out when I came upon this quote. The only thing that works is to use the non-x86 version of the latest OS (e.g. Lollipop Android 5.0.1 armeabi-v7a) in your AVD
Answer：
I had the same problem in win10 64bit, too.
After a lot of searching, I found this solution.(If you’re using an intel system(CPU, GPU, Motherboard, etc.))
Hope it work for you, too.
step 1: Make sure virtualization is enabled on your device:
Reboot your computer and then press F2 for BIOS setup.
You should find Virtualization tag and make sure it is marked as enabled.
If it’s not enabled, no virtual devices can run on your device.
step 2: Install/Update Intel Hardware Accelerated Execution Manager(Intel HAXM) on your device:
This software should be installed or updated for any AVDs to run.
You can download the latest version by googling “HAXM”.
After download, install .exe file and reboot your computer.
Answer：
Android emulator response time is very slow so you can try some alternative like
https://cloud.genymotion.com/page/launchpad/download/
Android Emulator Lock Screen Pc
or
both are very good option for testing application on development phase.
Answer：
I managed to fix this problem by manually re-installing HAXM. I think Android Studio screwed the install up. You can run the installer(.DMG) from this directory inside your Android SDK directory:
Answer：
I have recently the same issue in emulator, Nexus 5 (Android O). I have go to Android Virtual Device Manager and Wipe User Data and it solved my Problem.
Lock Screen Wallpaper
Answer：
The AVD is just booting up. Wait a bit and you’ll see a flashing android and after that it will show you the lock screen.
use the intel AVD if you want it to be a bit faster.
Answer：
I had this problem with a emulator running Android with API Level 14. I solved it by reducing the memory, the emulator uses. At the beginning it was set to about 1 GB and when I set it to 256MB everything was fine.
Answer：
I had the same problem on Macbook pro mid 2012 model with 4 GB RAM and intel core i5 processor, deleted the AVD and created new AVD.
While creating new AVD in the advanced options –>hardware configurations set memory as 512 MB and selected Use Host GPU option.
On launching AVD received the error with some package, was prompted for auto update of this package and worked for me with charm after that.
Answer：
I think your problem is that your application emulator doesn’t start because of your RAM storage, maybe you need to create a device with very low resolution.
Android Emulator Lock Screen Windows 10
Answer：
Tried all of the above. What eventually worked, was a combination of using software based graphics rendering, in combination of ‘older’ device images (nexus 7 works, nexus 10 doesn’t). Go figure.
And yeah, it’s very slow.
Answer：
If you got it to run the first time after installation but couldn’t get it to run again it might be because you have virtualization disabled. Go into your BIOS and enable it. This is also on the FAQS of andyroid on installation.
Answer：
I just started with android development recently and I had the problem with emulator showing black screen even when I was using software GPU acceleration.
On executing the following command in tools folder in Sdk folder of Android
The output which is given below showed that KVM was installed correctly and was usable.
So I installed the following packages
As I use Manjaro I didn’t find all the packages in software repo. I was able to find only the following packages
- qemu
- libvirt
- bridge-utils
Installing these helped me run AVD in both software and hardware GPU accleration.
Source: – https://developer.android.com/studio/run/emulator-acceleration.html
Answer：
Sounds like there are many possible solutions so here’s how I solved my black emulator screen after something (Gradle?) updated in Android Studio:
Android Emulator Lock Screen Pc
Change the AVD’s Graphics setting to “Software – GLES 2.0”
Link to my full answer of a related question with a screenshot: https://stackoverflow.com/a/48287265/6343114
Update: so far, this isn’t working on Play Store-enabled devices, because the Graphics setting can’t be changed
Lock Screen On Ipad
Answer：
I had the Problem with black screen plus audio fail messages with a newly installed Android Studio 3.4.1 on a fairly new amd machine. so i installed arm based virtual devices, used the Nexus 4 API 15 on targed 4.0.3 (Google API) as recommended for a first start.
I changed windows settings -> privacy -> microphone-> let other apps
use it to fix the failing audio messages.
for the black screen all the above suggestions didnt work for me, until i changed the settings on extended controls once the black screened virtual device comes up:
went to settings -> advanced and changed both “OpenGL ES renderer” and
“OpenGL ES API level” to “Desktop native OpenGL” and “Compatibility”
respectively.
a word of caution, the devices seem to be very fragile and get corrupted when changing stuff back and forth in avd manager, especially when changing system image.
Answer：
First Solution
Go to your source project file and remove these files and folders
Then close and reopen your project. After that try to build and run.
Second solution
Tools -> AVD Manager -> select your virtual device -> right click -> Wipe data
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