Failed to find Platform SDK with path: platforms;android-P

问题

Error:FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring project ':app'.

Failed to find Platform SDK with path: platforms;android-P

apply plugin: 'com.android.application'

    android {
        compileSdkVersion 'android-P'
        defaultConfig {
            applicationId "com.google.codelabs.mdc.java.shrine"
            minSdkVersion 15
            targetSdkVersion 28
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
            vectorDrawables.useSupportLibrary = true
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
     }

    dependencies {
        api 'com.android.support:design:28.0.0-alpha1'
        implementation 'com.android.support:support-v4:28.0.0-alpha1'
        implementation 'com.android.volley:volley:1.1.0'
        implementation 'com.google.code.gson:gson:2.8.2'
        testImplementation 'junit:junit:4.12'
        androidTestImplementation 'com.android.support.test:runner:1.0.1'
        androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    }

回答1:

Step 1: Open Preferences or Settings in Android studio. Select Android SDK options and Install Android API 28 as selected below.

Step 2: There's a problem with compileSdkVersion as you have to change it from 'android-P' to 28.

compileSdkVersion 28

And Build project. That's it.

回答2:

To fully test your app's compatibility with Android P and begin using new APIs, open your module-level build.gradle file and update the compileSdkVersion and targetSdkVersion as shown here:

android {
    compileSdkVersion 28

    defaultConfig {
        targetSdkVersion 28
    }
    ...
}

Set Up the Android P SDK

来源：https://stackoverflow.com/questions/51183581/failed-to-find-platform-sdk-with-path-platformsandroid-p