apk文件不包含java文件 [英] apk file does not contain the java file

问题描述

  E / AndroidRuntime（3069）：java.lang.RuntimeException：无法实例化活动ComponentInfo {fun.n.games/fun.n.games.HelloActivity}：java.lang.ClassNotFoundException：未在路径中找到类fun.n.games.HelloActivity：DexPathList [[zip文件/ data / app / fun.n.games-1 / base.apk]，nativeLibraryDirectories = [/ vendor / lib64，/ system / lib64]] 
  

当我尝试执行我的AVD上安装的Android应用程序时，显示此错误。

我的AVD运行如下：

  $ emulator -avd Nexus_S_API_22 
  

存在HelloActivity的代码。

  package fun.n.games; 
 
导入android.app.Activity; 
导入android.os.Bundle; 
导入android.widget.TextView; 
 
 public class HelloActivity extends Activity {
 
 @Override 
 public void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.hello_layout）; 
} 
 
 @Override 
 public void onStart（）{
 super.onStart（）; 
 TextView textView =（TextView）findViewById（R.id.text_view）; 
 textView.setText（Hello world！）; 
} 
 
} 
  

以下清单文件。

 <？xml version =1.0encoding =utf-8？> 
< manifest xmlns：android =http://schemas.android.com/apk/res/android
 package =fun.n.games
 android：versionCode = 1
 android：versionName =1.0.0> 
 
 
< application android：label =@ string / app_name> 
< activity 
 android：name =fun.n.games.HelloActivity
 android：label =@ string / app_name> 
< intent-filter> 
 < category android：name =android.intent.category.LAUNCHER/> 
< / intent-filter> 
< / activity> 
< / application> 
 
< / manifest> 
  

这是由一个build.gradle构建的

  buildscript {
 
 //使用jcenter存储库下载依赖关系
存储库{
 jcenter（）
 } 
 
依赖关系{
 classpath'com.android.tools.build:gradle:2.2.3'
} 
} 
 
 
 apply plugin：'com.android.application'
 
 android {
 compileSdkVersion 25 
 buildToolsVersion25.0.2
} 
  code> 

我在命令提示符下使用gradle来构建和安装



  $ gradle installDebug 
  

除了在开始时的错误发布时，当我搜索build文件夹时，我没有看到我期待的HelloActivity.class。



如何获取java类以添加到apk文件中？ c> with android：name =。HelloActivity

Am getting the following error

E/AndroidRuntime( 3069): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{fun.n.games/fun.n.games.HelloActivity}: java.lang.ClassNotFoundException: Didn't find class "fun.n.games.HelloActivity" on path: DexPathList[[zip file "/data/app/fun.n.games-1/base.apk"],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]]

This error shows up when I try to execute my android app that I have installed on my AVD.

My AVD is running as follows

$ emulator -avd Nexus_S_API_22

The code for the HelloActivity is present.

package fun.n.games;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class HelloActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.hello_layout);
    }

    @Override
    public void onStart() {
        super.onStart();
        TextView textView = (TextView) findViewById(R.id.text_view);
        textView.setText("Hello world!");
    }

}

It is being pulled together by the following manifest file.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="fun.n.games"
    android:versionCode="1"
    android:versionName="1.0.0" >


<application android:label="@string/app_name" >
        <activity
            android:name="fun.n.games.HelloActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

This is being built by a single build.gradle

buildscript {

// use the jcenter repository to download the dependencies
    repositories {
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.3'
    }
}


apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
}

And I am using gradle from command prompt to build and install

$ gradle installDebug

Apart from the error at the beginning of the post, when I search through the build folder, I don't see the HelloActivity.class that I was expecting there.

How do I get the java class to get added to the apk file?

解决方案

Replace android:name="fun.n.games.HelloActivity" with android:name=".HelloActivity"

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