Error Gradle Project Sync Failed Please Fix Your Project and Try Again

My start Android project was a music player, which was congenital on Android Studio and every bit a beginner and then, ane knows that it gets very very difficult to solve some of the Android errors especially in case of a sync mistake or a Gradle error.
Here in this article we volition become through the height 5 most common Android Gradle errors which you might face up while working on an Android project and then we will also analyze the problems and endeavour to solve them. And then let's starting time dive in to find what exactly is Gradle.

What is Gradle?

Gradle is a build automation tool oftentimes used for JVM languages such as Java, Groovy or Scala.

One absurd thing nigh gradle is that it is a plugin-based organisation. Gradle can be configured to run Tasks which do things like compile jars, run tests, create documentation and much more than.

Similarly for Android, the build system automatic and compiles the source code and then is used to package to deploy and distribute or to brand its APK. Android studio uses Gradle to automated the build process while at the same time also allowing custom build configs. Each build configuration can define its own set of code and resources, while reusing the parts common to all versions of your app. The Android plugin for Gradle works with the build toolkit to provide processes and configurable settings that are specific to building and testing Android applications.

Fig – The default projection structure for an Android app module

For more than information almost the build configuration, check this page on the official Android Studio site.

1) How to update gradle in android studio?

After updating Android Studio, information technology is possible that the Gradle is not up to date with the latest version of Android Studio and this gives an error that looks similar this-

Projection is using an old version of the Android Gradle plug- in . The minimum supported version is 0.v.0 . Please update the version of the dependency 'com.android.tools.build:gradle'

After the latest release version of Android Studio, it will automatically show a popup to upgrade the version of your Gradle if needed, but you lot tin can do that manually also.

For manually changing the Gradle version, but go to the top-level(projection-level) build.gradle file and in the dependencies change the class.

// Acme-level build file where y'all tin add configuration
// options common to all sub-projects/modules.

 buildscript
{
    repositories
    {
        google()
            jcenter()
    }
    dependencies
    {
        classpath 'com.android.tools.build:gradle:3.0.1'
        // change the gradle version as required
    }
}
allprojects
{
    repositories
    {
        google()
            jcenter()
    }
}

 task make clean(blazon
          : Delete)
{
    delete rootProject.buildDir
}

two) Error running android: Gradle projection sync failed

In Android Studio sometimes due to any issue or unsaved changes, some of the Gradle files may get deleted unexpectedly. And then when you will start building your apps you will go to see an error in Android studio every bit 'Error running android: Gradle project sync failed. The error looks like this-

Mistake running android: Gradle project sync failed. Delight prepare your project and try again.

We can solve the error simply past restarting your project using the Invalidate Caches and Restart option. You can find that selection hither:

Android Studio makes a lot of files every bit build and Gradle cache files and does not delete them. This can crusade trouble when there is a demand to make new files or some files are inverse, so immigration caches will clear the former cache and make Android Studio faster.

3) Gradle DSL method not found

Beneath is an example of a build.gradle file lawmaking in a project.

use plugin: 'android'

android {
    compileSdkVersion 21
    buildToolsVersion '20.0.0'

    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/detect.txt'
        exclude 'META-INF/ASL2.0'
    }

    defaultConfig {
        applicationId 'com.thirty.axxx'
        minSdkVersion xiv
        targetSdkVersion 19
        versionCode half-dozen
        versionName 'i.0'
    }
    buildTypes {
        release {
            runProguard faux
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:19.+'
    compile files('libs/commons-codec-one.8.jar')
    compile files('libs/asmack-android-eight-4.0.iv.jar')
    compile 'com.android.back up:support-v4:21.0.0'
    compile 'com.google.lawmaking.gson:gson:ii.2.4'
    compile 'com.jakewharton:butterknife:5.one.1'
}

This build.gradle file gives an fault every bit stated below-

Error: Gradle DSL method non institute: 'runProguard()'

To set up this problem you simply have to replace "runProguard" with "minifyEnabled".

If y'all are using version 0.14.0 or higher of the gradle plugin, you should supersede "runProguard" with "minifyEnabled" in your build.gradle files.

runProguard was renamed to minifyEnabled in version 0.14.0. For more info, Encounter Android Build System.

iv) Failed to resolve: com.android.back up:cardview- android

Generally such errors announced when yous are working with Android Studio 3 or below. This happens due to using incorrect dependencies.

Fault message –

Failed to resolve: com.android.support:cardview- android

To resolve all such bug :

If you are using Android Studio 3.0 or above brand certain your project build.gradle should accept content similar to-

buildscript {
    repositories {
        google()  // add google() earlier jcenter()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:iii.0.1'

    }
}

allprojects {
    repositories {
        google()  // add google() before jcenter()
        jcenter()
    }
}

And for below Android Studio iii.0 and starting from support libraries 26.+ your projection build.gradle must expect like this-

allprojects {
    repositories {
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
}

5) Cannot resolve symbol HttpClient

package com.mysite.myapp;

import org.apache.http.client.HttpClient;

public course Whatever {
    public void headBangingAgainstTheWallExample () {
        HttpClient client = new DefaultHttpClient();
    }
}

If you are using android SDK 23 or higher, and want to apply HTTP client yous will confront an fault which looks similar this

Mistake: Cannot resolve symbol HttpClient

HttpClient is not supported anymore in sdk 23. Y'all have to use URLConnection or downgrade to SDK 22 (compile 'com.android.support:appcompat-v7:22.2.0')

But even if you demand sdk 23, add this to your gradle:

android {
    useLibrary 'org.apache.http.legacy'
}

Conclusion

At that place are other tons of specific Gradle errors which y'all can face up while working on a project, but in this commodity I have stated the most common android gradle build errors
We went through the common errors and as well solved them while discussing what may have caused the fault to occur.
The world of android app evolution is total of possibilities and enough errors too, only information technology'due south e'er meliorate to non just solve the mistake but know the cause as well.
If yous have any doubts or feedback, please leave a annotate beneath and I will exist more than happy to aid.

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Source: https://www.applozic.com/blog/top-android-gradle-errors-and-how-to-resolve-them/