IllegalStateException異常：android.widget.ListView是不是可以通過這個SimpleAdapter

Question

得到一個IllegalStateException異常SimpleAdapter.java:195和...界限時表示，從簡單的適配器 東西列表視圖中，你可以在這裏得到我的源代碼https://github.com/Wifin/WifinApp視圖

代碼段1

public class MainActivity extends Activity 
{ 

    TextView txtlocation; 
    TextView txtstatus; 
    TextView txtinstant; 
    Button btn_loc; 
    Button btn_ser; 
    Button bnt_aploc; 
    ListView wifi_lv; 
    myLocation mlocal; 
    myWifi mwifi; 
    WifiReceiver mreceiver; 
    SimpleAdapter adapter; 
    ArrayList<HashMap<String, String>> arraylist; 
    String ITEM_KEY; 


    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 

     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     arraylist = new ArrayList<HashMap<String, String>>(); 
     ITEM_KEY = "key"; 

     adapter = new SimpleAdapter(
       this, 
       arraylist, 
       R.layout.activity_main, 
       new String[] { ITEM_KEY }, 
       new int[] { R.id.listView_wifi }); 

     txtlocation= (TextView) findViewById(R.id.locView); 
     btn_loc = (Button) this.findViewById(R.id.button_location); 
     btn_ser = (Button) this.findViewById(R.id.button_services); 
     bnt_aploc = (Button) this.findViewById(R.id.button_aploc); 
     wifi_lv =(ListView)findViewById(R.id.listView_wifi); 
     mlocal = new myLocation(); 
     mwifi =new myWifi(); 
     mreceiver =new WifiReceiver(); 

     mlocal.checkGoogleplay(this);  
     wifi_lv.setAdapter(adapter); 

     //mwifi.scanWifi(this.getApplicationContext()); 

     mwifi.wifi= (WifiManager) getSystemService(Context.WIFI_SERVICE); 


      btn_loc.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
        // TODO Auto-generated method stub 
       arraylist.clear(); 
        mlocal.getlocation(); 
        mwifi.scanWifi(); 
        mreceiver.getwifilist(MainActivity.this); 
       adapter.notifyDataSetChanged(); 
      } 
     }); 

代碼段2

package com.example.Wifin; 

import java.util.HashMap; 
import java.util.List; 

import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.net.wifi.ScanResult; 
import android.net.wifi.WifiManager; 

public class WifiReceiver extends BroadcastReceiver 
{ 

    List<ScanResult> wifilist; 
    int size=0; 
    double ap_rssi; 
    double ap_feq; 
    double distance; 
    String ssid; 


    @Override 
    public void onReceive(Context c, Intent i) { 
     // TODO Auto-generated method stub 
     System.out.println("111"); 
     if (i.getAction().equals(
       WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); 
     wifilist = ((WifiManager) c.getSystemService(Context.WIFI_SERVICE)).getScanResults(); 

    } 

    public void getwifilist (MainActivity ma) 
    { 
     if (wifilist!=null) 
     { 

     try { 
      size =wifilist.size()-1; 
      while (size >= 0) 
      {     
       ap_rssi = Double.valueOf(wifilist.get(size).level); 
       ap_feq = Double.valueOf(wifilist.get(size).frequency); 
       ssid = String.valueOf(wifilist.get(size).SSID); 

       distance=Math.pow(10, (Math.abs(ap_rssi)-20*Math.log10(ap_feq)-32.44)/20)*1000; 

       System.out.println("distance:"+(Math.round(distance*100))/100.0); 

       HashMap<String, String> item = new HashMap<String, String>(); 
       item.put(ma.ITEM_KEY, ssid +""+String.valueOf((Math.round(distance*100))/100.0)); 
       ma.arraylist.add(item); 
       size--; 
       } 
      } 
      catch (Exception e) { 

      } 
     } 
    } 

} 

目錄下載

08-25 01:25:55.427: E/AndroidRuntime(5009): FATAL EXCEPTION: main 
08-25 01:25:55.427: E/AndroidRuntime(5009): java.lang.IllegalStateException: android.widget.ListView is not a view that can be bounds by this SimpleAdapter 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.SimpleAdapter.bindView(SimpleAdapter.java:195) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.SimpleAdapter.createViewFromResource(SimpleAdapter.java:126) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.SimpleAdapter.getView(SimpleAdapter.java:114) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.AbsListView.obtainView(AbsListView.java:2177) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.ListView.measureHeightOfChildren(ListView.java:1247) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.ListView.onMeasure(ListView.java:1159) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.View.measure(View.java:15848) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.RelativeLayout.measureChild(RelativeLayout.java:698) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:494) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.View.measure(View.java:15848) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.View.measure(View.java:15848) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:302) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.View.measure(View.java:15848) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2189) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.View.measure(View.java:15848) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1905) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1104) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1284) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.Choreographer.doCallbacks(Choreographer.java:562) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.Choreographer.doFrame(Choreographer.java:532) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.os.Handler.handleCallback(Handler.java:730) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.os.Handler.dispatchMessage(Handler.java:92) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.os.Looper.loop(Looper.java:137) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at android.app.ActivityThread.main(ActivityThread.java:5103) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at java.lang.reflect.Method.invokeNative(Native Method) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at java.lang.reflect.Method.invoke(Method.java:525) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
08-25 01:25:55.427: E/AndroidRuntime(5009):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

你傳遞作爲ListView的划動您使用的活動內容佈局（包含wifi ListView的佈局）以及to陣列中的ListView的編號（R.id.listView_wifi）。這將失敗，因爲適配器無法將數據直接綁定到ListView，並且您嘗試執行的操作不正確。

您想要在要綁定數據的SimpleAdapter中使用不同的佈局。一個簡單的解決方案，因爲你刨去一個String綁定到該行，就是用這樣的：

adapter = new SimpleAdapter(
       this, 
       arraylist, 
       android.R.layout.simple_list_item_1, 
       new String[] { ITEM_KEY }, 
       new int[] { android.R.id.text1 }); 

Answer 2

從SimpleAdapter文檔

實現可選中的圖（例如複選框）。期望的綁定值是一個布爾值。

TextView。期望的綁定值是一個字符串，並調用setViewText（TextView，String）。

ImageView。期望的綁定值是資源ID或字符串，並調用setViewImage（ImageView，int）或setViewImage（ImageView，String）。

看起來傳遞Object作爲映射對象與SimpleAdapter不兼容。更改對象類型，或者創建自定義適配器（我建議以後）

而且也試試這個鏈接

Android, ListView IllegalStateException: "The content of the adapter has changed but ListView did not receive a notification"

list view java.lang.IllegalStateException even after calling notifyDataSetCanged();