响应listview事件，程序停止运行

[wangxiaofeiwuqiao]

一个小程序，点击listview行，实现画面跳转，模拟器一点击行响应事件程序就停止运行了，下面是响应代码和错误代码，哪位大神帮看看

 @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id)
    {
        Map<String,Object> map= (Map<String,Object>) adapter.getItem(position);
        String _id=map.get("imageid").toString();
        String name=map.get("titleid").toString();
        String time=map.get("txv").toString();
        Intent it=new Intent(MainActivity.this,Edit.class);

        it.putExtra("标题",name);
        startActivityForResult(it,position);
    }

java.lang.RuntimeException: Unable to start activity ComponentInfo{tw.a05.com.flag.ch08_memo2/tw.a05.com.flag.ch08_memo2.Edit}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
at android.app.ActivityThread.access$600(ActivityThread.java:122)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4340)
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:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at tw.a05.com.flag.ch08_memo2.Edit.onCreate(Edit.java:22)
at android.app.Activity.performCreate(Activity.java:4465)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 
at android.app.ActivityThread.access$600(ActivityThread.java:122) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:4340) 
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:784) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
at dalvik.system.NativeStart.main(Native Method) 

[Birds2018]

Edit.java 22行 有对象为NULL

[香辣小龙人]

错误发生在Edit这个Activity中，检查一下OnCreate事件代码，确认在mainfest里面注册了Edit这个类

[wangxiaofeiwuqiao]

引用 1 楼 birdsaction 的回复:

Edit.java 22行 有对象为NULL

经检查，你说的是对的。谢谢。

[wangxiaofeiwuqiao]

引用 1 楼 birdsaction 的回复:

Edit.java 22行 有对象为NULL

请问下大神，你是看哪里知道是22行代码有对象为NULL 的呢？本人是新手。

[Birds2018]

Caused by: java.lang.NullPointerException at tw.a05.com.flag.ch08_memo2.Edit.onCreate(Edit.java:22) at android.app.Activity.performCreate(Activity.java:4465)