我显示的对话框有两个 Spinner,对于其中一个我想设置选定的项目(要选择的项目通过 setArguments()/getArguments() 从主活动传递)
问题是我无法获得微调器,而是在
Spinner spinner = (Spinner) view.findViewById(R.id.ssd_weeksSelectSpinner);
DialogFragment 代码:
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");
}
}
}
根据要求,对话框的布局(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>
日志猫:
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)