具有构建工具的Android 4.1 28在奇怪的地方导致NoClassDefFoundError

时间:2019-02-08 13:09:13

标签: android noclassdeffounderror android-sdk-build-tools

在这里我有一个奇怪的情况,我使用构建工具28,目标是SDK版本28,但最低级别为16。

当我使用目标级别10时,下面的代码运行良好(至少在Android 8上如此)

在最终版本的Android 6,7,8,9代码上有效,但在android 4.1上无效(未在Android 5上进行测试)

这是个例外(示例中的代码行有些偏离,因为我不得不删除一些注释):

E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: com.some.appname.ConfigurationLoader$1
    at com.some.appname.ConfigurationLoader.load(ConfigurationLoader.java:46)
    at com.some.appname.SomeApplication.onCreate(SomeApplication.java:80)
    at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:999)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4151)
    at android.app.ActivityThread.access$1300(ActivityThread.java:130)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1255)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4745)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)

有问题的代码部分是这一段:

StartElementListener ol = new StartElementListener() {

    @Override
    public void start(Attributes attributes) {
        int nameIndex = attributes.getIndex("name");
        int valueIndex = attributes.getIndex("value");

        String name = attributes.getValue(nameIndex);
        String value = attributes.getValue(valueIndex);

        configuration.put(name, value);
    }
};

这是整个班级:

package com.some.appname;

import java.io.IOException;
import java.io.InputStream;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

import android.content.Context;
import android.sax.Element;
import android.sax.RootElement;
import android.sax.StartElementListener;
import android.util.Log;
import android.util.Xml;

/* package */class ConfigurationLoader {

    private static final String TAG = "ConfigurationLoader";

    /**
     * Loads options from xml file
     * 
     * @param context
     *            Context in which file is stored
     * @return Loaded configuration
     * @throws IOException
     *             If io errors occurs
     * @throws SAXException
     *             If config.xml is invalid
     */
    /* package */static Configuration load(Context context) throws IOException,
            SAXException {
        Log.i(TAG, "Loading configuration");

        final Configuration configuration = Configuration.getConfiguration();

        RootElement root = new RootElement("configuration");
        Element option = root.getChild("option");

        StartElementListener ol = new StartElementListener() {

            @Override
            public void start(Attributes attributes) {
                int nameIndex = attributes.getIndex("name");
                int valueIndex = attributes.getIndex("value");

                String name = attributes.getValue(nameIndex);
                String value = attributes.getValue(valueIndex);

                configuration.put(name, value);
            }
        };

        option.setStartElementListener(ol);

        InputStream in = context.getResources().openRawResource(R.raw.config);
        Xml.parse(in, Xml.Encoding.UTF_8, root.getContentHandler());

        return configuration;
    }
}

0 个答案:

没有答案