问题是，当我点击我的自定义微调器时，自定义对话框出现在列表视图单选按钮和底部的按钮，但默认情况下没有选择任何项目，即使我选择任何选择应用程序因为nullpointerexception而崩溃在SpinnerDialog中 - ＆gt; onItemClick - ＆gt; onItemSelectedListener.onItemSelected（文本）
我从here获取示例代码并使用alertdialog而不是dialog
我的客户微调班级
public class SpinnerCustomDialog extends Spinner implements DialogInterface.OnClickListener {
protected OnAddListener mListener = null;
public SpinnerCustomDialog(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public SpinnerCustomDialog(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public SpinnerCustomDialog(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public interface OnAddListener {
void onAdd(Spinner inSpinner);
}
@Override
public boolean performClick() {
//boolean handled = super.performClick(); //TODO how to avoid this skip ?
boolean handled = false;
if (!handled) {
handled = true;
Context context = getContext();
Log.w(SpinnerCustomDialog.class.getName(), "checlk1");
AccountDS datasource;
datasource = new AccountDS(context);
datasource.open();
List<Accounts> values = datasource.getAllAccountList();
Log.w(BalanceActivity.class.getName(), "List Size " + values.size());
datasource.close();
ArrayAdapter<Accounts> adapter = new ArrayAdapter<Accounts>(context, android.R.layout.simple_list_item_single_choice, values);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//SpinnerDialog lDialog = new SpinnerDialog(context, getSelectedItemPosition(), adapter, this);
SpinnerDialog lDialog = new SpinnerDialog(context, 1, adapter, this);
lDialog.setTitle("select category");
lDialog.show();
}
return handled;
}
@Override
public void onClick(DialogInterface dialog, int which)
{
Log.w(SpinnerCustomDialog.class.getName(), "onClick");
setSelection(which);
dialog.dismiss();
}
}
我的客户微调器对话框代码
public class SpinnerDialog extends AlertDialog implements OnItemClickListener, View.OnClickListener {
DialogInterface.OnClickListener mListener;
View promptsView;
OnItemSelectedListener onItemSelectedListener;
public Context mContext;
public interface OnItemSelectedListener
{
public void onItemSelected(String itemValue);
}
protected SpinnerDialog(Context context, int inPosition, ListAdapter inSpinnerAdapter, DialogInterface.OnClickListener inListener) {
super(context);
// TODO Auto-generated constructor stub
//this.setContentView(com.abdulwasie.mybalance.R.layout.activity_spinner_dialog);
promptsView = getLayoutInflater().inflate(R.layout.activity_spinner_dialog, null);
this.setView(promptsView);
mListener = inListener;
mContext = context;
Log.w(SpinnerDialog.class.getName(), "inside spinner dialog 1");
ListView lList = (ListView)promptsView.findViewById(R.id.listCategory);
lList.setAdapter(inSpinnerAdapter);
lList.setOnItemClickListener(this);
lList.setChoiceMode(ListView.CHOICE_MODE_SINGLE );
lList.setSelection(1);
Log.w(SpinnerDialog.class.getName(), "inside spinner dialog 2");
setButton(DialogInterface.BUTTON_POSITIVE, "Positive",
new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// This is replaced later
Log.w(SpinnerDialog.class.getName(), "button clicked");
}
});
Log.w(SpinnerDialog.class.getName(), "inside spinner dialog 3");
}
@Override
public void onClick(View v)
{
if(mListener != null)
mListener.onClick(this, DialogInterface.BUTTON_POSITIVE);
}
@Override
public void onItemClick(AdapterView parent, View view, int position, long id)
{
if(mListener != null)
mListener.onClick(SpinnerDialog.this, position);
String text = parent.getItemAtPosition(position).toString();
Log.w(SpinnerDialog.class.getName(), "onItemClick " + text);
onItemSelectedListener.onItemSelected(text);
}
}
和我的活动课
public class RegisterActivity extends Activity {
static final int DATE_DIALOG_ID = 1;
private int mYear;
private int mMonth;
private int mDay;
private EditText pickDate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
pickDate = (EditText) findViewById(R.id.pickdate);
pickDate.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
showDialog(DATE_DIALOG_ID);
}
return false;
}
});
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
updateDate();
//SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
//String currentDateandTime = sdf.format(new Date());
//pickDate.setText(mDay + "/" + mMonth + "/" + mYear);
//pickDate.setText(currentDateandTime);
AccountDS datasource;
datasource = new AccountDS(this);
datasource.open();
List<Accounts> values = datasource.getAllAccountList();
Log.w(BalanceActivity.class.getName(), "List Size " + values.size());
datasource.close();
ArrayAdapter<Accounts> adapter = new ArrayAdapter<Accounts>(this, android.R.layout.simple_list_item_1, values);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
final Spinner my_spin=(Spinner)findViewById(R.id.spinner1);
if (my_spin == null) {
Log.w(BalanceActivity.class.getName(), "my spin is null ");
}
my_spin.setAdapter(adapter);
SpinnerCustomDialog my_spin1 = (SpinnerCustomDialog)findViewById(R.id.spinner2);
my_spin1.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id)
{
Log.w(RegisterActivity.class.getName(), "onItemSelected");
}
@Override
public void onNothingSelected(AdapterView<?> parentView)
{
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_register, menu);
return true;
}
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
Log.w(BalanceActivity.class.getName(), mDay + " - " + mMonth + " - " + mYear );
return new DatePickerDialog(this, mDateSetListener, mYear, mMonth,
mDay);
}
return null;
}
protected void onPrepareDialog(int id, Dialog dialog) {
switch (id) {
case DATE_DIALOG_ID:
((DatePickerDialog) dialog).updateDate(mYear, mMonth, mDay);
break;
}
}
private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
mYear = year;
mMonth = view.getMonth();
mDay = dayOfMonth;
Log.w(BalanceActivity.class.getName(), "onDateSet: " + mDay + " - " + mMonth + " - " + mYear );
updateDate();
}
};
private void updateDate() {
try {
pickDate.setText(
new StringBuilder()
// Month is 0 based so add 1
.append(mDay).append("/")
.append(mMonth + 1).append("/")
.append(mYear));
} catch (Exception ex) {
}
}
}
和我的活动布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="70dp"
tools:context=".RegisterActivity" >
<EditText
android:id="@+id/pickdate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:clickable="true"
android:cursorVisible="false"
android:editable="false"
android:ems="7"
android:inputType="none"
android:singleLine="true" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/pickdate"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/pickdate"
android:layout_toRightOf="@+id/pickdate"
android:prompt="@+string/selectAccount"
android:ems="5" />
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/pickdate"
android:ems="10" >
</EditText>
<com.abdulwasie.mybalance.SpinnerCustomDialog
android:id="@+id/spinner2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editText2"
android:layout_toLeftOf="@+id/spinner1"
android:prompt="@+string/hello_world" />
</RelativeLayout>
日志：
12-08 09:11:04.278: E/AndroidRuntime(10993): FATAL EXCEPTION: main
12-08 09:11:04.278: E/AndroidRuntime(10993): java.lang.NullPointerException
12-08 09:11:04.278: E/AndroidRuntime(10993): at com.abdulwasie.mybalance.SpinnerDialog.onItemClick(SpinnerDialog.java:74)
12-08 09:11:04.278: E/AndroidRuntime(10993): at android.widget.AdapterView.performItemClick(AdapterView.java:284)
12-08 09:11:04.278: E/AndroidRuntime(10993): at android.widget.ListView.performItemClick(ListView.java:3569)
12-08 09:11:04.278: E/AndroidRuntime(10993): at android.widget.AbsListView$PerformClick.run(AbsListView.java:1831)
12-08 09:11:04.278: E/AndroidRuntime(10993): at android.os.Handler.handleCallback(Handler.java:587)
12-08 09:11:04.278: E/AndroidRuntime(10993): at android.os.Handler.dispatchMessage(Handler.java:92)
12-08 09:11:04.278: E/AndroidRuntime(10993): at android.os.Looper.loop(Looper.java:150)
12-08 09:11:04.278: E/AndroidRuntime(10993): at android.app.ActivityThread.main(ActivityThread.java:4385)
12-08 09:11:04.278: E/AndroidRuntime(10993): at java.lang.reflect.Method.invokeNative(Native Method)
12-08 09:11:04.278: E/AndroidRuntime(10993): at java.lang.reflect.Method.invoke(Method.java:507)
12-08 09:11:04.278: E/AndroidRuntime(10993): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
12-08 09:11:04.278: E/AndroidRuntime(10993): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
12-08 09:11:04.278: E/AndroidRuntime(10993): at dalvik.system.NativeStart.main(Native Method)