使用推送通知的错误，java.lang。IncompatibleClassChangeError:android.support.v4.content。ContextCompat错误

My app.gradle

我app.gradle

 apply plugin: 'com.android.application'
    apply plugin: 'android-apt'
    apply plugin: 'com.google.gms.google-services'
    android {
        compileSdkVersion 24
        buildToolsVersion "24.0.2"
        defaultConfig {
            applicationId "com.mss.plix"
            minSdkVersion 16
            targetSdkVersion 24
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
            multiDexEnabled true
        }
        //====================Add below two line=============
        dexOptions {
            javaMaxHeapSize "4g" //specify the heap size for the dex process
            preDexLibraries = false //delete the already predexed libraries
        }

        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    }

    ext {
        permissionsDispatcherVersion = '2.1.2'
    }
    dependencies {
        compile fileTree(include: ['*.jar'], dir: 'libs')
        androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
            exclude group: 'com.android.support', module: 'support-annotations'
        })
        compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha7'
        compile 'de.hdodenhof:circleimageview:2.0.0'
        compile 'com.jakewharton:butterknife:7.0.1'
        testCompile 'junit:junit:4.12'
        compile 'de.hdodenhof:circleimageview:2.0.0'
        compile 'com.isseiaoki:simplecropview:1.1.4'
        compile 'com.github.hotchemi:permissionsdispatcher:2.1.3'
        compile 'com.github.aakira:expandable-layout:1.4.1@aar'
        compile 'com.github.hotchemi:permissionsdispatcher:2.1.3'
        apt "com.github.hotchemi:permissionsdispatcher-processor:2.1.3"
        compile project(':library')
       compile 'com.android.support:appcompat-v7:24.2.0'
       compile 'com.android.support:design:24.2.0'
        compile 'com.android.support:recyclerview-v7:24.2.0'
        compile 'com.android.support:cardview-v7:24.2.0'
        compile 'com.google.code.gson:gson:2.6.2'
        compile 'com.squareup.retrofit2:retrofit:2.0.2'
        compile 'com.squareup.retrofit2:converter-gson:2.0.2'
        compile 'com.squareup.okhttp:okhttp:2.5.0'
        compile 'com.android.support:multidex:1.0.1'
        compile 'com.google.android.gms:play-services:9.0.0'
        compile 'com.android.support:support-v4:24.2.1'


    }



    repositories {
        jcenter()
    }
 apply plugin: '