Android 获取其他活动中的项目位置时出错

嗨，我有一个listview，我想占据litview的位置，但我得到了下一个错误：

FATAL EXCEPTION: main
    Process: com.amordeltarot.horoscopo.horoscoposdiarios, PID: 3465
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.amordeltarot.horoscopo.horoscoposdiarios/com.amordeltarot.horoscopo.horoscoposdiarios.horosocopovista}: 
    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.Intent.getIntExtra(java.lang.String, int)' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2327)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
    at android.app.ActivityThread.-wrap11(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5417)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.Intent.getIntExtra(java.lang.String, int)' on a null object reference
    at com.amordeltarot.horoscopo.horoscoposdiarios.horosocopovista.<init>(horosocopovista.java:14)
    at java.lang.Class.newInstance(Native Method)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1067)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2317)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
    at android.app.ActivityThread.-wrap11(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:5417) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

这是android清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.amordeltarot.horoscopo.horoscoposdiarios">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".horosocopovista"
            android:label="@string/title_activity_horosocopovista"
            android:parentActivityName=".MainActivity"
            android:theme="@style/AppTheme.NoActionBar">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.amordeltarot.horoscopo.horoscoposdiarios.MainActivity" />
        </activity>
    </application>

</manifest>

我希望你能帮助我，因为我不知道我做错了什么

int prePosition = getIntent().getIntExtra("position", 0);

调用

super.onCreate（savedInstanceState）后，内部
onCreate
，效果更好
尝试编写

int prePosition = getIntent().getIntExtra("position", 0);

调用
super.onCreate（savedInstanceState）后，内部
onCreate
，效果更好

int prePosition = getIntent().getIntExtra("position", 0);