For detailed tutorial and alternate methods to flash the TWRP recovery, click here. If not, proceed below. Unlocking the bootloader is the first step towards rooting any Android device. The procedure is simple and same for most of the Android devices like Nexus. Step 3: Reboot your Android device into the bootloader or Fastboot mode. To do so, issue the following command:. Step 4: Now issue the following command in the command prompt to check your device connectivity.
Step 5: Now issue the following command to get the bootloader unlock status on your device. Note 2: Check the bootloader status. This will reset your device and you will lose all data and apps.
Magisk has become quite popular rooting method lately. ConnectionCallbacks, GoogleApiClient. Fix in Settings. Builder context. Ketan Ramani Ketan Ramani 3, 27 27 silver badges 37 37 bronze badges. SahilChoudhary You are most welcome : — Ketan Ramani.
KetanRamani We need some clarification about these causes. Android OS sometime kill the background service, So how to get repetition location details? This is not called when your application is first installed. I hope this one will help to you :. Pei And this is all?
I have try to my code and got success try this package com. MukeshThakur MukeshThakur 4 4 silver badges 14 14 bronze badges.
Save me hours of coding. Cheers mate! In Android O background service are not working much more , so, However get the user location. This can be added into a background service which updates the Activity when onLocationChanged callbacks The background service will keep running as long as the application exists in the memory and sticks to the notification drawer.
Builder this. Jayakrishnan Jayakrishnan 3, 26 26 silver badges 27 27 bronze badges. This is excellent, thanks for posting! Works perfectly in my app that needs location across multiple Activities. It might be worth adding the check for whether Location is enabled on the device. Permissions are one thing, whether Location is actually on is another - developers. GeomagneticField; import android. Settings; import android. Please Enable it? Coldfin Lab Coldfin Lab 3 3 silver badges 8 8 bronze badges.
Using a LocationManager is cruelty towards user's phone battery. Services import android. Service import android. Context import android. Intent import android. Location import android.
LocationManager import android. Bundle import android. IBinder import android. And my app is for getting driver location. OK, so the user can't be affected for the requests and the service running in background, you only program the alarm every minute to launch a Intent to the Serbice, and the service take care of get and send the location.
Your button only register and unregister the pending intent on your alarm manager. Ali Akram Ali Akram 3, 2 2 gold badges 20 20 silver badges 30 30 bronze badges. Kishore Reddy Kishore Reddy 2, 17 17 silver badges 15 15 bronze badges.
Please include all relevant code in your post and don't just include a link to github. Your post should stand alone from any other resource; consider what would happen if github went down in the future!
If this error message is displayed, see Hardware acceleration issues below for steps you can take to verify and enable hardware acceleration. Acceleration is enabled but the emulator runs too slowly A common cause for this problem is not using an xbased image in your virtual device AVD. You can verify that hardware acceleration is enabled and which acceleration method the emulator is using by opening a command prompt and entering the following command:.
Hardware acceleration not available If Hyper-V is available, a message like the following example will be returned from the emulator-check. If hardware acceleration is not available, a message like the following example will be displayed the emulator looks for HAXM if it is unable to find Hyper-V :. If hardware acceleration is not available, see Accelerating with Hyper-V to learn how to enable hardware acceleration on your computer.
Incorrect BIOS settings If the BIOS has not been configured properly to support hardware acceleration, a message similar to the following example will be displayed when you run the emulator-check. To correct this problem, reboot into your computer's BIOS and enable the following options: Virtualization Technology may have a different label depending on motherboard manufacturer.
To verify that Hyper-V is enabled, use the following steps: 1. Enter powershell in the Windows search box. Right-click Windows PowerShell in the search results and select Run as administrator. In the PowerShell console, enter the following command:.
If Hyper-V is not enabled, a message similar to the following example will be displayed to indicate that the state of Hyper-V is Disabled:. If the Hypervisor is not enabled, a message similar to the following example will be displayed to indicate that the state of HypervisorPlatform is Disabled:. After these commands complete, reboot. Antivirus Software — If you are running antivirus software that uses hardware-assisted virtualization such as Avast , disable or uninstall this software, reboot, and retry the Android emulator.
You can disable Hyper-V from the Control Panel by following these steps: 1. Restart the computer. In some cases, using the above steps will not succeed in disabling Hyper-V if Device Guard and Credential Guard are enabled. This situation is often a problem for domain-joined machines that are configured and controlled by an owning organization. On Windows 10, use the following steps to see if Device Guard is running: 1. Enter System info in the Windows search box and select System Information in the search results.
In the System Summary, look to see if Device Guard Virtualization based security is present and is in the Running state:. If Device Guard is enabled, use the following steps to disable it: 1. Ensure that Hyper-V is disabled under Turn Windows Features on or off as described in the previous section. In the Windows Search Box, enter gpedit and select the Edit group policy search result. These steps launch the Local Group Policy Editor. In the Windows Search Box, enter cmd.
Copy and paste the following commands into the command prompt window if drive Z: is in use, pick an unused drive letter to use instead :. Restart your computer. On the boot screen, you should see a prompt similar to the following message: Do you want to disable Credential Guard? Press the indicated key to disable Credential Guard as prompted. After the computer reboots, check again to ensure that Hyper-V is disabled as described in the previous steps. If Hyper-V is still not disabled, the policies of your domain-joined computer may prevent you from disabling Device Guard or Credential Guard.
In this case, you can request an exemption from your domain administrator to allow you to opt out of Credential Guard. Alternately, you can use a computer that is not domain-joined if you must use HAXM. Additional troubleshooting tips The following suggestions are often helpful in diagnosing Android emulator issues. Starting the emulator from the command line If the emulator is not already running, you can start it from the command line rather than from within Visual Studio to view its output.
When you run this command, it will produce many lines of output while the emulator starts up. In particular, lines such as the following example will be printed if hardware acceleration is enabled and working properly in this example, HAXM is used for hardware acceleration :.
Viewing Device Manager logs Often you can diagnose emulator problems by viewing the Device Manager logs. The following example log entry indicates that HAXM was not found on the computer:. Deployment issues on macOS Some error messages may be displayed by the emulator when you deploy your app.
The most common errors and solutions are explained below. To verify connectivity, use the following steps: 1. Missing Google Play Services If the virtual device you are running in the emulator does not have Google Play Services or Google Play Store installed, this condition is usually caused by creating a virtual device without including these packages.
If you are not certain whether hardware acceleration is enabled on your computer or you would like to know which technology is providing the acceleration , see Hardware acceleration issues below for steps you can take to verify and enable hardware acceleration.
Acceleration is enabled but the emulator runs too slowly A common cause for this problem is not using an xbased image in your virtual device. When you create virtual device see Managing Virtual Devices with the Android Device Manager , be sure to select an xbased system image:.
Hardware acceleration issues Whether you are using the Hypervisor Framework or HAXM for hardware acceleration of the emulator, you may run into problems caused by installation issues or an out-of-date version of macOS. The following sections can help you resolve this issue. Hypervisor Framework issues If you are using macOS However, some older Macs or Macs running a version of macOS earlier than To determine whether or not your Mac supports the Hypervisor Framework, open a Terminal and enter the following command:.
If your Mac supports the Hypervisor Framework, the above command will return the following result:. HAXM issues are often the result of conflicts with other virtualization technologies, incorrect settings, or an out-of-date HAXM driver.
Starting the emulator from the command line If the emulator is not already running, you can start it from the command line rather than from within Visual Studio for Mac to view its output.
In particular, lines such as the following example will be printed if hardware acceleration is enabled and working properly in this example, Hypervisor Framework is used for hardware acceleration :. Framework OS X Version The following example log entry indicates that HAXM was not found:. This article explains how to setup an Android device and connect it to a computer so that the device may be used to run and debug Xamarin. After testing on an Android emulator, you will want to see and test your apps running on an Android device.
Here are the steps involved with connecting a device to a computer for debugging: 1. Enable Debugging on the Device - By default, it will not be possible to debug applications on a Android device. Windows computers may require the installation of USB drivers.
Each of these steps will be covered in more detail in the sections below. Enable Debugging on the Device It is possible to use any Android device to test an Android application. However the device must be properly configured before debugging can occur. The steps involved are slightly different, depending on the version of Android running on the device.
Android 4. Go to the Settings screen. Select Developer options. Check off the USB debugging option. This screenshot shows the Developer options screen on a device running Android 4.
It may be necessary to install some extra drivers before a Windows computer will recognize an Android device connected by USB. Steps for your specific device may vary, but will follow a similar pattern. Search the internet for your device if you have trouble.
Run the android. By default, the Xamarin. The driver for the Galaxy Nexus is distributed by Samsung. All other Android devices should use the USB driver from their respective manufacturer. The default path for a Xamarin. To install the drivers on Windows 7: 1. Connect your device to the computer with a USB cable. Right-click on the Computer from your desktop or Windows Explorer, and select Manage.
Select Devices in the left pane. Locate and expand Other Devices in the right pane. Right-click the device name and select Update Driver Software.
This will launch the Hardware Update Wizard. Select Browse my computer for driver software and click Next. Click Next to install the driver. Installing Unverified Drivers in Windows 8 Extra steps may be required to install an unverified driver in Windows 8. The following steps describe how to install the drivers for a Galaxy Nexus: 1. Start up a command line prompt and reboot the computer by using the following command:.
Connect the device - Connect the device to the computer 3. Start Device Manager - Run devmgmt. Install the Device Drivers - Install the device drivers as described above. Connect the Device to the Computer The final step is to connect the device to the computer.
There are two ways to do so: USB cable - This is the easiest and most common way. Just plug the USB cable into the device and then into the computer.
This technique requires a bit more effort but could be useful when the device is too far from the computer to remain constantly plugged-in via cable.
Connecting via WiFi will be covered in the next section. To do this, both the device and the computer must be on the same WiFi network. To setup your environment to debug over WiFi issue these steps from the command line: 1. Determine the IP address of your Android device. Connect your Android device to your computer via USB. From a command prompt, type the following command:.
After this command is issued, your computer will not be able to listen to devices that are connected via USB. Disconnect the USB cable connecting your device to your computer. Configure ADB so that it will connect to your Android device on the port that was specified in step 1 above:. Once this command finished the Android device is connected to the computer via WiFi.
It is possible to ask ADB to list the devices that are connected to the computer. Regardless of how the devices are connected, you can issue the following command at the command prompt to see what is connected:. Summary This article discussed how to configure an Android device for development by enabling debugging on the device. This guide describes the steps for switching to an internal distribution of OpenJDK.
This distribution is intended for mobile development. Overview Beginning with Visual Studio This is a required migration as Oracle is ending support for commercial distribution of JDK 8 in , and JDK 8 is a required dependency for all Android development.
Reduced download size and footprint. No more issues with 3rd party servers and installers. The setup process is described below, and you can revert back to the Oracle JDK at any time. For existing Visual Studio for Mac users, you will be prompted to install it as part of your update. You can follow the status of the issues here.
In this two -part guide, you will build your first Xamarin. Android application using Visual Studio for Mac or Visual Studio and develop an understanding of the fundamentals of Android application development with Xamarin. Along the way, the tools, concepts, and steps required to build and deploy a Xamarin.
Android application will be introduced. Part 1: Quickstart In the first part of this guide you'll create an application that translates an alphanumeric phone number entered by the user into a numeric phone number, and then calls that number. Part 2: Deep Dive In the second part of this document, you'll review what was built and develop a fundamental understanding of how Android applications work.
Android application with Visual Studio and develop an understanding of the fundamentals of Android application development with Xamarin. Download the sample You will create an application that translates an alphanumeric phone number entered by the user into a numeric phone number and display the numeric phone number to the user.
The final application looks like this:. Windows requirements To follow along with this walkthrough, you will need the following: Windows Visual Studio or Visual Studio version This walkthrough assumes that the latest version of Xamarin. Android is installed and running on your platform of choice. For a guide to installing Xamarin. Android, refer to the Xamarin. Android Installation guides. Configuring emulators If you are using the Android emulator, we recommend that you configure the emulator to use hardware acceleration.
Instructions for configuring hardware acceleration are available in Hardware Acceleration for Emulator Performance. Create the project Start Visual Studio. In the New Project dialog, click the Android App template. Name the new project Phoneword and click OK:. After the new project is created, expand the Resources folder and then the layout folder in the Solution Explorer. The default layout will be a RelativeLayout. From the Toolbox the area on the left , enter text into the search field and drag a Text Large widget onto the design surface the area in the center :.
Placement of the widget will not occur until you move the mouse pointer to a place in the layout that can accept the widget. In the screenshots below, the widget cannot be placed as seen on the left until the mouse pointer is moved just below the previous TextView as shown on the right :. When the Plain Text an EditText widget is placed correctly, it will appear as illustrated in the following screenshot:. Drag a Button from the Toolbox to the design surface and place it underneath the Plain Text widget:.
Drag a TextView from the Toolbox to the design surface and place it under the Button widget. Write some code The next step is to add some code to translate phone numbers from alphanumeric to numeric. This creates a new empty C class. ToUpperInvariant ;.
Contains c return 2; else if "DEF". Contains c return 3; else if "GHI". Contains c return 4; else if "JKL". Contains c return 5; else if "MNO". Contains c return 6; else if "PQRS". Contains c return 7; else if "TUV". Contains c return 8; else if "WXYZ".
Save the changes to the PhoneTranslator. Wire up the user interface The next step is to add code to wire up the user interface by inserting backing code into the MainActivity class. Begin by wiring up the Translate button. In the MainActivity class, find the OnCreate method.
First, modify the template code so that the OnCreate method resembles the following:. App; using Android. OS; using Android. Runtime; using Android. OnCreate savedInstanceState ;. Get a reference to the controls that were created in the layout file via the Android Designer. TranslateButton ;. Add code that responds to user presses of the Translate button. Add the following code to the OnCreate method after the lines added in the previous step :. ToNumber phoneNumberText. Text ; if string. If there are errors, go through the previous steps and correct any mistakes until the application builds successfully.
If you get a build error such as, Resource does not exist in the current context, verify that the namespace name in MainActivity. If you still get build errors, verify that you have installed the latest Visual Studio updates. Set the app name You should now have a working application — it's time to set the name of the app. Expand the values folder inside the Resources folder and open the file strings. Change the app name string to Phone Word as shown here:. Run the app Test the application by running it on an Android device or emulator.
To run the app on an Android device, see how to set up your device for development. Click New Project Click Next. In the Configure your Android app dialog, name the new app Phoneword and click Next. In the Configure your new Android App dialog, leave the Solution and Project names set to Phoneword and click Create to create the project.
After the new project is created, expand the Resources folder and then the layout folder in the Solution pad.
Double-click Main. Button on the design surface and press the Delete key to remove it. From the Toolbox the area on the right , enter text into the search field and drag a Text Large widget onto the design surface the area in the center :.
Notice that you can use the search field to help locate widgets by name:. Write some code Now, add some code to translate phone numbers from alphanumeric to numeric.
This creates a new empty C class for us. Ensure that there are no compile-time errors by rebuilding the solution. Wire up the user interface The next step is to add code to wire up the user interface by adding the backing code into the MainActivity class.
Double-click MainActivity. Begin by adding an event handler to the Translate button. Add the button code inside OnCreate , below the base. Main calls. Remove any existing button handling code i. Content; using Android. Views; using Android. Widget; using Android. OnCreate bundle ;.
Main ;. Next, a reference is needed to the controls that were created in the layout file with the Android Designer. Add code that responds to user presses of the Translate button by adding the following code to the OnCreate method after the lines added in the last step :. If you still get build errors, verify that you have installed the latest Xamarin. Android and Visual Studio for Mac updates.
Set the label and app icon Now that you have a working application, it's time to add the finishing touches! Start by editing the Label for MainActivity. The Label is what Android displays at the top of the screen to let users know where they are in the application.
Now it's time to set the application icon. By default, Visual Studio for Mac will provide a default icon for the project. Delete these files from the solution, and replace them with a different icon.
Expand the Resources folder in the Solution Pad. Notice that there are five folders that are prefixed with mipmap-, and that each of these folders contains a single Icon. Right click on each of Icon. Click on the Delete button in the dialog. Next, download and unzip Xamarin App Icons set. This zip file holds the icons for the application. Each icon is visually identical but at different resolutions it renders correctly on different devices with different screen densities.
The set of files must be copied into the Xamarin. Android project. Select Icon. Repeat these steps for each of the mipmap- folders until the contents of the mipmap- Xamarin App Icons folders are copied to their counterpart mipmap- folders in the Phoneword project.
After all the icons are copied to the Xamarin. Android project, open the Project Options dialog by right clicking on the project in the Solution Pad. Congratulations on completing your first Xamarin. Android application! Now it's time to dissect the tools and skills you have just learned.
Next up is the Hello, Android Deep Dive. In this two -part guide, you'll build your first Xamarin. Android application and develop an understanding of the fundamentals of Android application development with Xamarin.
Along the way, you will be introduced to the tools, concepts, and steps required to build and deploy a Xamarin. In the Hello, Android Quickstart, you built and ran your first Xamarin. Now it's time to develop a deeper understanding of how Android applications work so that you can build more sophisticated programs.
This guide reviews the steps that you took in the Hello, Android walkthrough so that you can understand what you did and begin to develop a fundamental understanding of Android application development. This guide will touch upon the following topics: Introduction to Visual Studio — Introduction to Visual Studio and creating a new Xamarin.
Anatomy of a Xamarin. Android Application - Tour of the essential parts of a Xamarin. Activities and the Activity Lifecycle — An introduction to the Activity Lifecycle and wiring up the user interface in code. Testing, Deployment, and Finishing Touches — Complete your application with advice on testing, deployment, generating artwork, and more. Android Application — Tour of the essential parts of a Xamarin.
This guide helps you develop the skills and knowledge required to build a single-screen Android application. After you work through it, you should understand the different parts of a Xamarin. Android application and how they fit together. Successfully reported this slideshow. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime. Nxp nfc pn porting on nexus 5 x for android oreo hands on ar00c0.
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