Question

我是android编程的新手。这是我尝试运行的简单程序。如果发布位置不正确，请随时忽略。该程序取自here

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class AppleFragment extends Fragment {

    public AppleFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_apple, container, false);
    }




}

Iam使用android compileSdkVersion 29和buildToolsVersion“ 29.0.2”。这是我的buid.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.abhiandroid.viewpagerexample.myapplication"
        minSdkVersion 15
        targetSdkVersion 29
        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'])
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.androidx.support', module: 'support-annotations'
    })

    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'junit:junit:4.12'
}

我正在使用

dependencies {
        classpath 'com.android.tools.build:gradle:3.5.2'.

请帮助我为什么我会收到这些错误

错误：找不到符号类片段
错误：找不到符号类片段
错误：方法未覆盖或从超类型实现方法
错误：找不到符号变量super
错误：方法未从超类型

覆盖或实现方法

“找不到符号类片段”是我得到的错误

0 个答案: