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Android 简单图像listview NullPointerException错误_Android_Android Listview - Fatal编程技术网

Android 简单图像listview NullPointerException错误

Android 简单图像listview NullPointerException错误,android,android-listview,Android,Android Listview,我试图创建一个简单的listview,它使用字符串数组中的自定义图像和字符串,但是当我运行它时,它会给出一个null指针异常,即storage=null。我不知道发生了什么,我已经三次检查了所有的图像拼写等。。。找不到任何东西可能是代码中的原因 对于图片,我在res文件夹中创建了一个名为drawable的新目录,并将它们放在那里,为了安全起见,我还将它们添加到其他drawable文件夹中 这里是错误 java.lang.RuntimeException: Unable to start acti

我试图创建一个简单的listview,它使用字符串数组中的自定义图像和字符串,但是当我运行它时,它会给出一个null指针异常,即storage=null。我不知道发生了什么,我已经三次检查了所有的图像拼写等。。。找不到任何东西可能是代码中的原因

对于图片,我在res文件夹中创建了一个名为drawable的新目录,并将它们放在那里,为了安全起见,我还将它们添加到其他drawable文件夹中

这里是错误

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.whosaidthat.endos.customimagelistview/com.whosaidthat.endos.customimagelistview.MyActivity}: java.lang.NullPointerException: storage == null
这里是主要活动

   package com.whosaidthat.endos.customimagelistview;

import android.content.Context;
import android.content.res.Resources;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;


public class MyActivity extends ActionBarActivity {
    ListView list;
    String[] memeTitles;
    String[] memeDescriptions;
    int[] memeImages = {R.drawable.meme1, R.drawable.meme2, R.drawable.meme3, R.drawable.meme4, R.drawable.meme5, R.drawable.meme6, R.drawable.meme7, R.drawable.meme8, R.drawable.meme9, R.drawable.meme10,R.drawable.meme1, R.drawable.meme2, R.drawable.meme3, R.drawable.meme4, R.drawable.meme5, R.drawable.meme6, R.drawable.meme7, R.drawable.meme8, R.drawable.meme9, R.drawable.meme10};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        Resources res = getResources();
        res.getStringArray(R.array.titles);
        res.getStringArray(R.array.descriptions);

        list = (ListView) findViewById(R.id.listView);

        lvAdapter adapter = new lvAdapter(this, memeTitles, memeImages, memeDescriptions);
        list.setAdapter(adapter);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.my, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

class lvAdapter extends ArrayAdapter<String>{
    int size=1;
    Context context;
    int[] images;
    String[] titleArray;
    String[] descriptionArray;
    lvAdapter(Context c, String[] titles, int imgs[], String[] descriptions){

        super(c, R.layout.single_row, R.id.textView, titles);
        this.context = c;
        this.images=imgs;
        this.titleArray = titles;
        this.descriptionArray = descriptions;

    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        //Converts the xml based single row into a java based view that we can manipulate and use
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View row = inflater.inflate(R.layout.single_row, parent, false);
        ImageView myImage = (ImageView) row.findViewById(R.id.imageView);
        myImage.setImageResource(images[position]);
        TextView myTitle = (TextView) row.findViewById(R.id.textView);
        myTitle.setText(titleArray[position]);
        TextView myDescription = (TextView) row.findViewById(R.id.textView2);
        myDescription.setText(descriptionArray[position]);





        return row;
    }
}
package com.whosaidthat.endos.customimagelistview;
导入android.content.Context;
导入android.content.res.Resources;
导入android.support.v7.app.ActionBarActivity;
导入android.os.Bundle;
导入android.view.LayoutInflater;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.ArrayAdapter;
导入android.widget.ImageView;
导入android.widget.ListView;
导入android.widget.TextView;
公共类MyActivity扩展了ActionBarActivity{
列表视图列表;
字符串[]成员;
字符串[]memeDescriptions;
int[]memeImages={R.drawable.meme1,R.drawable.meme2,R.drawable.meme3,R.drawable.meme4,R.drawable.meme5,R.drawable.meme6,R.drawable.meme7,R.drawable.meme8,R.drawable.meme9,R.drawable.meme10,R.drawable.meme1,R.drawable.meme2,R.drawable.meme3,R.drawable.meme4,R.drawable.meme5,R.drawable.meme6,R.drawable.meme7,R.drawable.meme8,R.drawable表10};
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
Resources res=getResources();
res.getStringArray(R.array.titles);
res.getStringArray(R.array.descriptions);
list=(ListView)findViewById(R.id.ListView);
lvAdapter=新的lvAdapter(this、memetiles、memeImages、memeDescriptions);
list.setAdapter(适配器);
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(R.menu.my,menu);
返回true;
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
if(id==R.id.action\u设置){
返回true;
}
返回super.onOptionsItemSelected(项目);
}
}
类lvAdapter扩展了ArrayAdapter{
int size=1;
语境;
int[]图像;
字符串[]titleArray;
字符串[]描述数组;
lvAdapter(上下文c,字符串[]标题,int-imgs[],字符串[]说明){
super(c,R.layout.single_row,R.id.textView,titles);
this.context=c;
这个.images=imgs;
this.titleArray=标题;
this.descriptionArray=描述;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
//将基于xml的单行转换为我们可以操作和使用的基于java的视图
LayoutFlater充气器=(LayoutFlater)context.getSystemService(context.LAYOUT\u充气器\u服务);
视图行=充气机。充气(R.layout.single_row,parent,false);
ImageView myImage=(ImageView)row.findViewById(R.id.ImageView);
setImageResource(图像[位置]);
TextView myTitle=(TextView)row.findViewById(R.id.TextView);
myTitle.setText(titleArray[位置]);
TextView myDescription=(TextView)row.findViewById(R.id.textView2);
myDescription.setText(descriptionArray[位置]);
返回行;
}
}
如果你还需要什么,请告诉我

谢谢

编辑

这是异常的完整日志

    07-27 10:15:03.466    1261-1261/com.whosaidthat.endos.customimagelistview D/dalvikvm﹕ Late-enabling CheckJNI
07-27 10:15:04.056    1261-1261/com.whosaidthat.endos.customimagelistview D/AndroidRuntime﹕ Shutting down VM
07-27 10:15:04.056    1261-1261/com.whosaidthat.endos.customimagelistview W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x416e8ba8)
07-27 10:15:04.076    1261-1261/com.whosaidthat.endos.customimagelistview E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.whosaidthat.endos.customimagelistview, PID: 1261
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.whosaidthat.endos.customimagelistview/com.whosaidthat.endos.customimagelistview.MyActivity}: java.lang.NullPointerException: storage == null
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
            at android.app.ActivityThread.access$800(ActivityThread.java:135)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5001)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NullPointerException: storage == null
            at java.util.Arrays$ArrayList.<init>(Arrays.java:38)
            at java.util.Arrays.asList(Arrays.java:155)
            at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:141)
            at com.whosaidthat.endos.customimagelistview.lvAdapter.<init>(MyActivity.java:67)
            at com.whosaidthat.endos.customimagelistview.MyActivity.onCreate(MyActivity.java:34)
            at android.app.Activity.performCreate(Activity.java:5231)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
            at android.app.ActivityThread.access$800(ActivityThread.java:135)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5001)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)
07-27 10:15:10.186    1261-1261/com.whosaidthat.endos.customimagelistview I/Process﹕ Sending signal. PID: 1261 SIG: 9
07-27 10:15:03.466 1261-1261/com.whosaidthat.endos.customimagelistview D/dalvikvm﹕ 延迟启用CheckJNI
07-27 10:15:04.056 1261-1261/com.whosaidthat.endos.customimagelistview D/AndroidRuntime﹕ 关闭虚拟机
07-27 10:15:04.056 1261-1261/com.whosaidthat.endos.customimagelistview W/dalvikvm﹕ threadid=1:线程以未捕获异常退出(组=0x416e8ba8)
07-27 10:15:04.076 1261-1261/com.whosaidthat.endos.customimagelistview E/AndroidRuntime﹕ 致命异常:主
进程:com.whosaidthat.endos.customimagelistview,PID:1261
java.lang.RuntimeException:无法启动活动组件信息{com.whosaidthat.endos.customimagelistview/com.whosaidthat.endos.customimagelistview.MyActivity}:java.lang.NullPointerException:存储==null
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)上
位于android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
在android.app.ActivityThread.access$800(ActivityThread.java:135)
在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)上
位于android.os.Handler.dispatchMessage(Handler.java:102)
位于android.os.Looper.loop(Looper.java:136)
位于android.app.ActivityThread.main(ActivityThread.java:5001)
位于java.lang.reflect.Method.Invokenactive(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:515)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)上
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
在dalvik.system.NativeStart.main(本机方法)
原因:java.lang.NullPointerException:storage==null
位于java.util.Arrays$ArrayList。(Arrays.java:38)
位于java.util.Arrays.asList(Arrays.java:155)
String[] memeTitles;
String[] memeDescriptions;
String[] memeTitles = res.getStringArray(R.array.titles);
String[] memeDescriptions = res.getStringArray(R.array.descriptions);