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ERR_CLEARTEXT_NOT_PERMITTED in Android

/api/users/login net::ERR_CLEARTEXT_NOT_PERMITTED

I am getting ERR_CLEARTEXT_NOT_PERMITTED error in android application using ionic.



To allow network connections of type http, https in Android , enable

cleartextTrafficPermitted="true"

create a file  in this path  res/xml/network_security_config.xml

network_security_config.xml:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true">
        <trust-anchors>
            <certificates src="system" />
        </trust-anchors>
    </base-config>
</network-security-config>

for unit converter, currency converter, please visit https://thewebtoolspro.com

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ionic build issue Cannot read property 'Keyboard' of undefined

 Uncaught TypeError: Cannot read property 'Keyboard' of undefined

solution:

ionic cordova plugin add cordova-plugin-ionic-keyboard

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Could not find iPhone 6 simulator React Native

When running react-native run-ios

getting "Could not find iPhone 6 simulator "


solution:

node_modules/react-native/local-cli/runIOS/findMatchingSimulator.js

replace
if (version.indexOf('iOS') !== 0)
with
if (version.indexOf('com.apple.CoreSimulator.SimRuntime.iOS') !== 0)

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platforms/android/gradlew: Command failed with exit code EACCES

srinivas$ ionic cordova plugin add cordova-plugin-x-toast
> cordova plugin add cordova-plugin-x-toast --save
Installing "cordova-plugin-x-toast" for android
ANDROID_HOME=/Users/srinivas/Library/Android/sdk/
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home
Subproject Path: CordovaLib
Failed to install 'cordova-plugin-x-toast': Error: /Users/srinivas/v1/platforms/android/gradlew: Command failed with exit code EACCES
    at ChildProcess.whenDone (/Users/srinivas/Documents/v1/platforms/android/cordova/node_modules/cordova-common/src/superspawn.js:169:23)
    at ChildProcess.emit (events.js:182:13)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:235:12)
    at onErrorNT (internal/child_process.js:406:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
Error: /Users/srinivas/Documents/v1/platforms/android/gradlew: Command failed with exit code EACCES
[ERROR] An error occurred while running subprocess cordova.
       
        cordova plugin add cordova-plugin-x-toast --save exited with exit code
        1.
       
        Re-running this command with the --verbose flag may provide more
        information.
Srinivass$ cd ..

solution: 

Provide necessary rights to the  project folder.
Srinivass$ chmod -R 777  v1/

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React Native -iOS - Print: Entry, ":CFBundleIdentifier", Does Not Exist

Installing build/Build/Products/Debug-iphonesimulator/silent_auction.app

An error was encountered processing the command (domain=NSPOSIXErrorDomain, code=22):

Failed to install the requested application

The bundle identifier of the application could not be determined.

Ensure that the application's Info.plist contains a value for CFBundleIdentifier.

Print: Entry, ":CFBundleIdentifier", Does Not Exist

Command failed: /usr/libexec/PlistBuddy -c Print:CFBundleIdentifier build/Build/Products/Debug-iphonesimulator/silent_auction.app/Info.plist

Print: Entry, ":CFBundleIdentifier", Does Not Exist

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com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException: INSTALL_FAILED_UPDATE_INCOMPATIBLE

com.android.ddmlib.InstallException: INSTALL_FAILED_UPDATE_INCOMPATIBLE

        at com.android.ddmlib.Device.installRemotePackage(Device.java:1004)

        at com.android.ddmlib.Device.installPackage(Device.java:911)

        at com.android.builder.testing.ConnectedDevice.installPackage(ConnectedDevice.java:122)

        at com.android.build.gradle.internal.tasks.InstallVariantTask.install(InstallVariantTask.java:171)

        at com.android.build.gradle.internal.tasks.InstallVariantTask.install(InstallVariantTask.java:105)

        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)

        at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.doExecute(DefaultTaskClassInfoStore.java:141)

        at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:134)

        at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:121)

        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:731)

        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:705)

        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:122)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)

        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:111)

        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:92)

        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)

        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:63)

        at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)

        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)

        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:88)

        at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)

        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)

        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)

        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)

        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)

        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)

        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)

        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)

        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)

        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:124)

        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:80)

        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:105)

        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:99)

        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)

        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:580)

        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:99)

        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)

        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)

        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':app:installRelease'.

> com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException: INSTALL_FAILED_UPDATE_INCOMPATIBLE

* Try:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org

BUILD FAILED in 11s

65 actionable tasks: 3 executed, 62 up-to-date

Could not install the app on the device, read the error above for details.

Make sure you have an Android emulator running or a device connected and have

set up your Android development environment:

https://facebook.github.io/react-native/docs/android-setup.html

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