Android 在片段中使用自定义视图改变方向时的奇怪行为

我有一个FragmentActivity其中显示了一个Fragment默认情况下。该片段由一个EditText, a TextView和一个自定义下拉菜单，通过扩展AutoCompleteTextView。 如果我的习惯AutoCompleteTextView已获得焦点或下拉列表已打开，并且我更改了设备的方向。我收到以下异常：

查找窗口失败
java.lang.IllegalArgumentException：请求的窗口 null 不存在

如果自定义的话它可以工作AutoCompleteTextView未处于聚焦状态。 我尝试过将焦点移开onSaveInstanceState()通过使其他布局获得焦点requestFocus()我在网上搜索了两天多，似乎没有人遇到过这样的问题自定义视图在碎片和方向变化的背景下。

这是我的 FragmentActivity：

public class Balance_Inquiry extends FragmentActivity implements OnTouchListener, EventCallbackListener, DataCallBack,CustomResultReceiver.Receiver  {

LinearLayout balInquiryLayout;
FragmentTransaction fragmentTransaction;
FragmentManager fm;
Fragment fr;

//SQLiteDatabase sql;
//ConDb db;

public final static int ACTIVITY_ID = 2;
private Bundle orientationData;



protected void onCreate(Bundle savedInstanceState){

    try{
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
    DisplayMetrics metrics = getResources().getDisplayMetrics();
    int screenWidth = (int) (metrics.widthPixels * 0.90);

    setContentView(R.layout.common_blank_dialog);
    //Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler(this));
    Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler(App.context()));

    getWindow().setLayout(screenWidth, LayoutParams.WRAP_CONTENT);

    balInquiryLayout = (LinearLayout) findViewById(R.id.dialogtoplayout);
    orientationData = savedInstanceState;
    if(savedInstanceState == null){
        fr = new Balance_Main_Fragment();
         fm = getSupportFragmentManager();
         fragmentTransaction = fm.beginTransaction();
         fragmentTransaction.setCustomAnimations(R.anim.zoom_enter, R.anim.zoom_exit);
         fragmentTransaction.add(R.id.dialogtoplayout, fr,"tag1");
         fragmentTransaction.commit();
    }
    else{
         fr = getSupportFragmentManager().findFragmentByTag("tag1");
    }


    balInquiryLayout.setOnTouchListener(this);
    }
    catch(Exception e){
        e.printStackTrace();
    }

}

@Override
public boolean onTouch(View v, MotionEvent event) {

    balInquiryLayout.requestFocus();
    DisableKeyboard.hideKB(v, getApplicationContext());
    return false;
}




private AccountBean ab_;
private ValuesBean resp_;




public void show_result(){
    try{
      fr = new Balance_Result_Fragment();
         fm = getSupportFragmentManager();
         fragmentTransaction = fm.beginTransaction();
         fragmentTransaction.setCustomAnimations(R.anim.zoom_enter, R.anim.zoom_exit);
         fragmentTransaction.add(R.id.dialogtoplayout, fr, "tag2");
         fragmentTransaction.commit();
    }

    catch(Exception e){
        e.printStackTrace();
    }
}


public void hideResult(){


      fr = new Balance_Result_Fragment();
         fm = getSupportFragmentManager();
    fragmentTransaction = fm.beginTransaction();
    fragmentTransaction.setCustomAnimations(R.anim.zoom_exit,R.anim.zoom_enter);
    fragmentTransaction.remove(fr).commit();


    //new Balance_Main_Fragment().clearAll();

}



@Override
public void onButtonClicked(int a) {


    switch(a){

            case 0:
                {


                    hideResult();

                    try{


                          fm = getSupportFragmentManager();
                          Balance_Main_Fragment fre=(Balance_Main_Fragment)getSupportFragmentManager().findFragmentByTag("tag1");
                             fre.clearAll();

                         fre.enableButtons();
                         }
                         catch(Exception e){
                             e.printStackTrace();
                         }

                    break;
                }

            case 1:
            {
                show_result();
                break;
            }


    }

}







@Override
public void passData(String... a) {


}







@Override
public void passData(Object... a) {
    try{
     this.ab_=(AccountBean) a[0];
     this.resp_ = (ValuesBean) a[1];     
     }
    catch(ClassCastException e){
        e.printStackTrace();
    }


}







@Override
public Object[] getData() {
    // TODO Auto-generated method stub
    return new Object[]{this.ab_,this.resp_};
}

@Override
public void onBackPressed(){
    if(MainExpandActivity.backApprove== true){
        if(ParserMain.isMyServiceRunning(MessengerService.class, this)){
        NetworkThread.stopServiceNow(Balance_Inquiry.this);
        NetworkThread.unBindServicePlz(Balance_Inquiry.this);
        }
        super.onBackPressed();
    }
    else{
        // do nothing here hehehehe
    }

}

@Override
public void onReceiveResult(int resultCode, final Bundle resultData) {
    Log.e("activity", "activties onRecieveresul is called");
}

public void onDestroy(){
    //NetworkThread.unBindServicePlz(Balance_Inquiry.this);
    super.onDestroy();
    Log.e("onDestory()", "onDestory() is called");
    if(isFinishing()){
        NetworkThread.unBindServicePlz(this.getApplicationContext());
        NetworkThread.stopServiceNow(this.getApplicationContext());
        Log.e("onDestory()", "isFinishing() block");
    }

}

public void onWindowFocusChanged(boolean hasFocus) {

    super.onWindowFocusChanged(hasFocus);

  if(hasFocus) 
     Toast.makeText(Balance_Inquiry.this, "focus gained", Toast.LENGTH_LONG).show();

  else
      Toast.makeText(Balance_Inquiry.this, "focus lost", Toast.LENGTH_LONG).show();
}



public void onPause(){
    Log.e("onPause()", "pause called");
    balInquiryLayout.requestFocus();

    super.onPause();

    }

}

以下是我的 Fragment 类，仅发布其中的相关片段：

InstantAutoComplete accounts;  // custom View
LinearLayout balInq2ndLayout;
@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);

    setRetainInstance(true);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    main_view = inflater.inflate(R.layout.fragment_balance1, container,false);
    sub = (Button) main_view.findViewById(R.id.sub_bal);

    cancel = (Button) main_view.findViewById(R.id.cancel_bal);

    accounts = (InstantAutoComplete) main_view.findViewById(R.id.bal_accounts);

    mHat = new Handler();
    balInq2ndLayout = (LinearLayout) main_view.findViewById(R.id.balInq2ndLayout);
    balInq2ndLayout_2 = (LinearLayout) main_view.findViewById(R.id.balInq2ndLayout_2);


    macBalance = (TextView) main_view.findViewById(R.id.macbal_balinq);

    macBalance.setText(SessionInfo.getBalanceString()+SessionInfo.getMacBalance());
    bal_prog = (TextView) main_view.findViewById(R.id.bal_status);

    pb = (ProgressBar) main_view.findViewById(R.id.progressBarBalance);
    pb.setVisibility(View.GONE);
    balInq2ndLayout.requestFocus();
    balInq2ndLayout.setOnTouchListener(this);
    balInq2ndLayout_2.setOnTouchListener(this);

    pin_no = (EditText) main_view.findViewById(R.id.bal_pin);

    bal_accountLocked = (EditText) main_view.findViewById(R.id.bal_accountlocked);

    bal_accountLocked.setEnabled(false);
    bal_accountLocked.setFocusable(false);
    bal_accountLocked.setVisibility(View.GONE);


    myData = new Bundle();

    if(savedInstanceState==null){

    bal_accountLocked.setVisibility(View.GONE);


    }
    else{

        pin_no.setText(savedInstanceState.getString("pin"));

        if(savedInstanceState.getBoolean("key")){
            bal_accountLocked.setVisibility(View.VISIBLE);
            bal_accountLocked.setText(savedInstanceState.getString("locked"));
        }


        if(accounts.getText().toString().length()!=0){
            ab = savedInstanceState.getParcelable("ab");
        }

        if(savedInstanceState.getBoolean("progress")){

            pb.setVisibility(View.VISIBLE);
            disableButtons();
        }

        accounts.setText(savedInstanceState.getString("account"));

    }




    Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler(App.context()));

    final ArrayAdapter adapter = new ArrayAdapter(getActivity(), android.R.layout.select_dialog_item, ObjectsHolder.ab);
    accounts.setAdapter(adapter);

    accounts.setOnFocusChangeListener(new OnFocusChangeListener() {

        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            if(!hasFocus){
                if(accounts.getText().length()==0){
                //Toast.makeText(getActivity(), "focus lost", Toast.LENGTH_LONG).show();
                accounts.setText(saved1);
                DisableKeyboard.disableSoftInputFromAppearing(accounts, getActivity());

                    }
                }
            else if(hasFocus){
                DisableKeyboard.disableSoftInputFromAppearing(accounts, getActivity());
            }

        }
    });

    accounts.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            DisableKeyboard.disableSoftInputFromAppearing(accounts, getActivity());
            saved1=DisableKeyboard.showAll(accounts);
            if(accounts.getText().toString().length()==0){
                bal_accountLocked.setText("");
                bal_accountLocked.setVisibility(View.GONE);
            }
            return false;
        }
    });



    accounts.setOnItemClickListener(new AdapterView.OnItemClickListener() {
          @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id){
                Log.e("inside setOnItemSelectedListener", "this is called normally");
                //Toast.makeText(arg0.getContext(), "On item click: "+arg0.getItemAtPosition(arg2), 1).show();
                ab= (AccountBean) adapter.getItem(position);

                //ab = (AccountBean) arg0.getItemAtPosition(arg2);
                if(ab==null){
                    Log.e("ab object", "is null :(");
                }
                else{
                    bal_accountLocked.setVisibility(View.VISIBLE);
                    bal_accountLocked.setText(ab.getAccountNumber());
                }
                //saved1 = (String) arg0.getItemAtPosition(arg2);
    }

    });

    return main_view;

}

@Override
public boolean onTouch(View v, MotionEvent event) {
    balInq2ndLayout.requestFocus();
    DisableKeyboard.hideKB(v, getActivity());
    return false;
}


    public void onSaveInstanceState(Bundle state){
      super.onSaveInstanceState(state);
      Log.e("onSaved", "onSaved is  called");
      balInq2ndLayout.requestFocus(); // setting request here to LinearLayout
      if(bal_accountLocked.isShown()){
      state.putString("locked", bal_accountLocked.getText().toString());
      state.putBoolean("key", true);
      }
      if(ab!=null){
        state.putParcelable("ab", ab);
      }
      state.putString("pin", pin_no.getText().toString());

      if(pb.getVisibility() == View.VISIBLE){
        state.putBoolean("progress", true);
        state.putBoolean("back", true);
      }

      if(accounts.getText().toString().length()!=0){
        state.putString("account", accounts.getText().toString());
      }

  }

最后这是我的自定义 AutoCompleteTextView

import android.content.Context;  
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.AutoCompleteTextView;


public class InstantAutoComplete extends AutoCompleteTextView {
String savedTexti2;

public InstantAutoComplete(Context context) {
    super(context);
}

public InstantAutoComplete(Context arg0, AttributeSet arg1) {
    super(arg0, arg1);
}

public InstantAutoComplete(Context arg0, AttributeSet arg1, int arg2) {
    super(arg0, arg1, arg2);
}

@Override
public boolean enoughToFilter() {
    return true;
}

@Override
protected void onFocusChanged(boolean focused, int direction,
        Rect previouslyFocusedRect) {
    super.onFocusChanged(focused, direction, previouslyFocusedRect);
    if (focused) {
        performFiltering(getText(), 0);
        showAll();
    }
    else{
        //Toast.makeText(getContext(), "works", 10).show();
        //restore();
    }

}


public void restore() {
    this.setText(savedTexti2);
}

public void showAll() {
    savedTexti2 = this.getText().toString();
    this.setText("");
    this.showDropDown();
    }





}

这是完整的 StackTrace：

查找窗口失败
java.lang.IllegalArgumentException：请求的窗口 null 不存在 在 com.android.server.WindowManagerService.windowForClientLocked(WindowManagerService.java:9293) 在 com.android.server.WindowManagerService.addWindow(WindowManagerService.java:1891) 在 com.android.server.WindowManagerService$Session.add(WindowManagerService.java:6771) 在 android.view.IWindowSession$Stub.onTransact(IWindowSession.java:66) 在 com.android.server.WindowManagerService$Session.onTransact(WindowManagerService.java:6743)
在 android.os.Binder.execTransact(Binder.java:288) 在dalvik.system.NativeStart.run（本机方法） 尝试添加带有非窗口标记的窗口：null。正在流产。

我尝试了很多不同的方法，例如从 AutoCompleteTextView 中移除焦点、切换焦点......但似乎没有任何效果。如果有人能帮助我，我将不胜感激，因为我已经访问了 stackoverflow 的每个角落，但没有运气。如果有人遇到过这个问题并成功解决了，请这里的兄弟帮忙。

--EDIT--

这个问题是在API 8的模拟器中产生的

在 JellyBean API 17 的模拟器上进行了测试，效果很好。没有例外。我想知道它是否只与较低的 API 有关。必须一一检查。叹