问题描述
我显示对话框有两个纱厂,并为其中的一个,我想设置所选项目(项目选择从主要活动通过与setArguments()/ getArguments())
问题是我不能得到的微调,而不是我在
得到一个NullPointerException异常 微调微调=(微调)view.findViewById(R.id.ssd_weeksSelectSpinner);
该DialogFragment code:
进口android.app.Activity;
进口android.app.AlertDialog;
进口android.app.Dialog;
进口android.content.DialogInterface;
进口android.os.Bundle;
进口android.support.v4.app.DialogFragment;
进口android.util.Log;
进口android.view.LayoutInflater;
进口android.view.View;
进口android.widget.Spinner;公共类属性同好会扩展DialogFragment
{
公共对话框onCreateDialog(捆绑savedInstanceState)
{
AlertDialog.Builder建设者=新AlertDialog.Builder(getActivity());
LayoutInflater吹气= getActivity()getLayoutInflater()。 builder.setView(inflater.inflate(R.layout.activity_schedule_select_dialog,NULL))
.setPositiveButton(R.string.ssd_select_positive,新DialogInterface.OnClickListener()
{
公共无效的onClick(DialogInterface对话,诠释其)
{
mListener.onDialogPositiveClick(DFrag.this);
}
})
.setNegativeButton(R.string.select_negative,新DialogInterface.OnClickListener()
{
@覆盖
公共无效的onClick(DialogInterface对话,诠释它){
mListener.onDialogNegativeClick(DFrag.this);
DFrag.this.getDialog()取消()。
}
}); builder.setInverseBackgroundForced(真); 返回builder.create();
}
公共无效onActivityCreated(捆绑savedInstanceState)
{
查看查看= getView(); 微调微调=(微调)view.findViewById(R.id.ssd_weeksSelectSpinner);
spinner.setSelection(getArguments()调用getInt(SelectWeek)。); super.onActivityCreated(savedInstanceState);
} 公共接口DFragListener
{
公共无效onDialogPositiveClick(DialogFragment对话);
公共无效onDialogNegativeClick(DialogFragment对话);
} DFragListener mListener;
@覆盖
公共无效onAttach(活动活动)
{
super.onAttach(活动);
尝试
{
mListener =(DFragListener)活性;
}
赶上(抛出ClassCastException E)
{
抛出新ClassCastException异常(activity.toString()+监听器没有实现);
}
}
}
根据要求,布局的对话框(activity_schedule_select_dialog.xml):
<?XML版本=1.0编码=UTF-8&GT?;
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:方向=垂直> <的TextView
机器人:ID =@ + ID / ssd_classLabel
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=@字符串/ select_class_label
机器人:layout_marginRight =4dip
机器人:layout_marginLeft =4dip/>
<微调
机器人:ID =@ + ID / ssd_classSelectSpinner
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:layout_marginBottom =4dip
机器人:项=@阵列/ urnikClasses/> <的TextView
机器人:ID =@ + ID / ssd_weekLabel
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=@字符串/ select_week_label
机器人:layout_marginRight =4dip
机器人:layout_marginLeft =4dip/>
<微调
机器人:ID =@ + ID / ssd_weeksSelectSpinner
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:项=@阵列/ weeksArray/> <复选框
机器人:ID =@ + ID / ssd_DefaultChkbox
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=@字符串/ ssd_DefaultChkBoxTxt/>
< / LinearLayout中>
logcat的:
05-12 13:16:16.288:E / AndroidRuntime(4310):致命异常:主要
05-12 13:16:16.288:E / AndroidRuntime(4310):显示java.lang.NullPointerException
05-12 13:16:16.288:E / AndroidRuntime(4310):在com.rogy.scks.urnik.DFrag.onActivityCreated(DFrag.java:91)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1468)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:931)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.support.v4.app.FragmentManagerImpl $ 1.run(FragmentManager.java:429)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.os.Handler.handleCallback(Handler.java:725)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.os.Handler.dispatchMessage(Handler.java:92)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.os.Looper.loop(Looper.java:137)
05-12 13:16:16.288:E / AndroidRuntime(4310):在android.app.ActivityThread.main(ActivityThread.java:5195)
05-12 13:16:16.288:E / AndroidRuntime(4310):在java.lang.reflect.Method.invokeNative(本机方法)
05-12 13:16:16.288:E / AndroidRuntime(4310):在java.lang.reflect.Method.invoke(Method.java:511)
05-12 13:16:16.288:E / AndroidRuntime(4310):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:795)
05-12 13:16:16.288:E / AndroidRuntime(4310):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-12 13:16:16.288:E / AndroidRuntime(4310):在dalvik.system.NativeStart.main(本机方法)
找到了解决办法,而不是试图找到onActivityCreated(捆绑savedInstanceState)公共无效
在公共对话框onCreateDialog(捆绑savedInstanceState)
我从
改变 AlertDialog.Builder建设者=新AlertDialog.Builder(getActivity());
LayoutInflater吹气= getActivity()getLayoutInflater()。 builder.setView(inflater.inflate(R.layout.activity_schedule_select_dialog,NULL))
.setPositiveButton(R.string.ssd_select_positive,新DialogInterface.OnClickListener()
{
公共无效的onClick(DialogInterface对话,诠释其)
{
mListener.onDialogPositiveClick(DFrag.this);
}
})
.setNegativeButton(R.string.select_negative,新DialogInterface.OnClickListener()
{
@覆盖
公共无效的onClick(DialogInterface对话,诠释它){
mListener.onDialogNegativeClick(DFrag.this);
DFrag.this.getDialog()取消()。
}
});
要
AlertDialog.Builder建设者=新AlertDialog.Builder(getActivity());
LayoutInflater吹气= getActivity()getLayoutInflater()。
查看查看= inflater.inflate(R.layout.activity_schedule_select_dialog,NULL); builder.setView(视图)
.setPositiveButton(R.string.ssd_select_positive,新DialogInterface.OnClickListener()
{
公共无效的onClick(DialogInterface对话,诠释其)
{
mListener.onDialogPositiveClick(DFrag.this);
}
})
.setNegativeButton(R.string.select_negative,新DialogInterface.OnClickListener()
{
@覆盖
公共无效的onClick(DialogInterface对话,诠释它){
mListener.onDialogNegativeClick(DFrag.this);
DFrag.this.getDialog()取消()。
}
});
和在末尾添加
微调微调=(微调)view.findViewById(R.id.ssd_weeksSelectSpinner);
spinner.setSelection(getArguments()调用getInt(SelectWeek)。);
The dialog I show has two Spinners, and for one of those I'd like to set the selected item (item to select is passed from the main activity with setArguments()/getArguments())
The problem is I can't get the spinner, instead I get a NullPointerException at
Spinner spinner = (Spinner) view.findViewById(R.id.ssd_weeksSelectSpinner);
The DialogFragment code:
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Spinner;
public class DFrag extends DialogFragment
{
public Dialog onCreateDialog(Bundle savedInstanceState)
{
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
builder.setView(inflater.inflate(R.layout.activity_schedule_select_dialog, null))
.setPositiveButton(R.string.ssd_select_positive, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
mListener.onDialogPositiveClick(DFrag.this);
}
})
.setNegativeButton(R.string.select_negative, new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which) {
mListener.onDialogNegativeClick(DFrag.this);
DFrag.this.getDialog().cancel();
}
});
builder.setInverseBackgroundForced(true);
return builder.create();
}
public void onActivityCreated(Bundle savedInstanceState)
{
View view = getView();
Spinner spinner = (Spinner) view.findViewById(R.id.ssd_weeksSelectSpinner);
spinner.setSelection(getArguments().getInt("SelectWeek"));
super.onActivityCreated(savedInstanceState);
}
public interface DFragListener
{
public void onDialogPositiveClick(DialogFragment dialog);
public void onDialogNegativeClick(DialogFragment dialog);
}
DFragListener mListener;
@Override
public void onAttach(Activity activity)
{
super.onAttach(activity);
try
{
mListener = (DFragListener) activity;
}
catch (ClassCastException e)
{
throw new ClassCastException(activity.toString() + " Listener not implemented");
}
}
}
As requested, layout for the dialog (activity_schedule_select_dialog.xml):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/ssd_classLabel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/select_class_label"
android:layout_marginRight="4dip"
android:layout_marginLeft="4dip"/>
<Spinner
android:id="@+id/ssd_classSelectSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="4dip"
android:entries="@array/urnikClasses"/>
<TextView
android:id="@+id/ssd_weekLabel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/select_week_label"
android:layout_marginRight="4dip"
android:layout_marginLeft="4dip"/>
<Spinner
android:id="@+id/ssd_weeksSelectSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:entries="@array/weeksArray"/>
<CheckBox
android:id="@+id/ssd_DefaultChkbox"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/ssd_DefaultChkBoxTxt"/>
</LinearLayout>
Logcat:
05-12 13:16:16.288: E/AndroidRuntime(4310): FATAL EXCEPTION: main
05-12 13:16:16.288: E/AndroidRuntime(4310): java.lang.NullPointerException
05-12 13:16:16.288: E/AndroidRuntime(4310): at com.rogy.scks.urnik.DFrag.onActivityCreated(DFrag.java:91)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1468)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:931)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:429)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.os.Handler.handleCallback(Handler.java:725)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.os.Handler.dispatchMessage(Handler.java:92)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.os.Looper.loop(Looper.java:137)
05-12 13:16:16.288: E/AndroidRuntime(4310): at android.app.ActivityThread.main(ActivityThread.java:5195)
05-12 13:16:16.288: E/AndroidRuntime(4310): at java.lang.reflect.Method.invokeNative(Native Method)
05-12 13:16:16.288: E/AndroidRuntime(4310): at java.lang.reflect.Method.invoke(Method.java:511)
05-12 13:16:16.288: E/AndroidRuntime(4310): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-12 13:16:16.288: E/AndroidRuntime(4310): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-12 13:16:16.288: E/AndroidRuntime(4310): at dalvik.system.NativeStart.main(Native Method)
Found the solution, instead of trying to find the view in public void onActivityCreated(Bundle savedInstanceState)
In public Dialog onCreateDialog(Bundle savedInstanceState)
I changed from
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
builder.setView(inflater.inflate(R.layout.activity_schedule_select_dialog, null))
.setPositiveButton(R.string.ssd_select_positive, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
mListener.onDialogPositiveClick(DFrag.this);
}
})
.setNegativeButton(R.string.select_negative, new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which) {
mListener.onDialogNegativeClick(DFrag.this);
DFrag.this.getDialog().cancel();
}
});
To
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
View view = inflater.inflate(R.layout.activity_schedule_select_dialog, null);
builder.setView(view)
.setPositiveButton(R.string.ssd_select_positive, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
mListener.onDialogPositiveClick(DFrag.this);
}
})
.setNegativeButton(R.string.select_negative, new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which) {
mListener.onDialogNegativeClick(DFrag.this);
DFrag.this.getDialog().cancel();
}
});
And at the end added
Spinner spinner = (Spinner) view.findViewById(R.id.ssd_weeksSelectSpinner);
spinner.setSelection(getArguments().getInt("SelectWeek"));
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