错误：程序类型已存在：android.support.v4.graphics.drawable.IconCompatParcelizer

Question

我正在尝试在家学习Android Studio，今天我正在学习null，并跟随了一个剪辑，但在该剪辑的末尾它起作用了，但对我来说却不是，我遇到以下错误：< / strong>

  

错误：程序类型已存在：       android.support.v4.graphics.drawable.IconCompatParcelizer

我的build.gradle

ocr

我的activity_main.xml

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.android.imagetotextmobileload"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner 
 "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 
 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:cardview-v7:28.0.0'

    implementation 'com.android.support:customtabs:28.0.0'
    implementation 'com.android.support:support-vector-drawable:28.0.0'
    implementation 'com.android.support:support-media-compat:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'

    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'


    //image crop library
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.8.0'

    //image to text google library
    implementation 'com.google.android.gms:play-services-vision:17.0.2'
 }

和我的MainActivity.java文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    tools:context=".MainActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <android.support.v7.widget.CardView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:cardBackgroundColor="#fff"
                app:cardUseCompatPadding="true"
                app:cardCornerRadius="3dp"
                app:cardElevation="3dp">
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"
                    android:padding="5dp">
                    <TextView
                        android:text="Result"
                        android:textColor="@color/colorPrimary"
                        android:textSize="20sp"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content" />
                    <!--The scanned text from image will display here-->
                    <EditText
                        android:id="@+id/resultEt"
                        android:hint="Click + button to insert Image"
                        android:autoLink="all"
                        android:background="@null"
                        android:padding="5dp"
                        android:textColor="#000"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content" />
                </LinearLayout>
            </android.support.v7.widget.CardView>
            <android.support.v7.widget.CardView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:cardBackgroundColor="#fff"
                app:cardUseCompatPadding="true"
                app:cardCornerRadius="3dp"
                app:cardElevation="3dp">
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"
                    android:padding="5dp">
                    <TextView
                        android:text="Image Preview"
                        android:textColor="@color/colorPrimary"
                        android:textSize="20sp"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content" />
                    <!--The image taken will be displayed here-->
                    <ImageView
                        android:id="@+id/imageIv"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:maxHeight="250dp"/>
                </LinearLayout>
            </android.support.v7.widget.CardView>

        </LinearLayout>
    </ScrollView>

</RelativeLayout>