捆绑savedIntanceStatem“错误”

Question

我的代码：

import android.app.Fragment; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.support.v7.app.ActionBarActivity; 
import android.view.KeyEvent; 
import android.widget.Button; 

public class KlassenActivity extends ActionBarActivity { 

    @Override 
     protected void onCreate(Bundle savedIntanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_5aklassen); 

      if(savedInstanceState == null) { 

      } else { 

      } 

    } 

我已经尝试了很多，但我找不到我做了什么错？

帮帮我！

误差在线路

super.onCreate(savedInstanceState); 

这个出现是错误：

"savedInstanceState cannot be resolved to a variable" 

整个代码（在陆侃：d）：

package com.example.hvt; 


import android.app.Fragment; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.support.v7.app.ActionBarActivity; 
import android.view.KeyEvent; 
import android.widget.Button; 

public class KlassenActivity extends ActionBarActivity { 

PlaceholderFragment taskFragement; 

@Override 
    protected void onCreate(Bundle savedIntanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_5aklassen); 

     if(savedInstanceState == null) { 
      taskFragement=new PlaceholderFragment(); 
      getSupportFragmentManager 

     } else { 

     } 

    } 

    public boolean onKeyDown (int keycode, KeyEvent event) { 
     if (keycode == KeyEvent.KEYCODE_BACK) { 
      setContentView(R.layout.activity_main); 
      startActivity(new Intent(KlassenActivity.this,MainActivity.class)); 
     } 
     return false; 
    } 

    public static class PlaceholderFragment extends Fragment { 

     public PlaceholderFragment() { 
     } 
     @Override 
     public void onActivityCreated(Bundle savedInstancesState) { 
      super.onActivityCreated(savedInstanceState); 
      setRetainInstance(true); 
     } 
    } 
    public static class TechCrunchTask extends AsyncTask<Void, Void, Void> { 

     @Override 
     protected Void doInBackground(Void...params) { 
      return null; 

     } 
    } 

} 

Answer 1

在功能声明，savedInstanceState拼写为savedIntanceState