我有以下代码，我的搜索栏因nullpoint exeption而崩溃。 在我的上一个问题Why is my dialog seekbar crashing中，我找不到解决问题的信息。
此处代码：
dialog_context_mark_edit：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/edit_mark_dialog"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:id="@+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Name" />
<EditText
android:id="@+id/edit_mark_name"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/lololol"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"/>
<SeekBar
android:id="@+id/seek_edit_gewicht"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/TextView02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Note" />
<EditText
android:id="@+id/edit_mark_note"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Datum" />
<DatePicker
android:id="@+id/date_maturity_mark_edit"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dip"
android:orientation="horizontal" >
<Button
android:id="@+id/cmd_save_mark"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Updaten" />
<Button
android:id="@+id/cmd_close_mark"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/close" />
</LinearLayout>
</LinearLayout>
班级标记：
SeekBar seekBar_wertung, seek_edit_gewicht, seek_gewicht, seek_gewichtt;
TextView gewicht, gewicht_test;
OnSeekBarChangeListener yourSeekBarListener = new OnSeekBarChangeListener() {
public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {
// TODO Auto-generated method stub
// change progress text label with current seekbar value
gewicht_test.setText(progress+"%");
// change action text label to changing
}
public void onStartTrackingTouch(SeekBar seekBar) {
}
public void onStopTrackingTouch(SeekBar seekBar) {
seekBar.setSecondaryProgress(seekBar.getProgress());
}
};
对话框：
@Override
protected Dialog onCreateDialog(int id) {
Dialog dialog = null;;
switch(id) {
case ADD_MARK_DIALOG:
dialog = new Dialog(mark.this);
dialog.setContentView(R.layout.dialog_context_mark);
dialog.setTitle("Note hinzufügen");
insert_markname = (EditText)dialog.findViewById(R.id.insert_markname);
insert_note = (EditText)dialog.findViewById(R.id.insert_mark);
cmd_add_mark = (Button)dialog.findViewById(R.id.cmd_add_mark);
cmd_close_popup = (Button)dialog.findViewById(R.id.cmd_close_popup);
date_pick = (DatePicker)dialog.findViewById(R.id.date_maturity_mark);
seek_gewicht = (SeekBar)dialog.findViewById(R.id.seekBar_wertung);
seek_gewicht.setOnSeekBarChangeListener(yourSeekBarListener);
gewicht = (TextView)dialog.findViewById(R.id.txt_weight_change);
cmd_add_mark.setOnClickListener(add_mark);
cmd_close_popup.setOnClickListener(close_popup);
break;
case EDIT_MARK_DIALOG:
dialog = new Dialog(mark.this);
dialog.setContentView(R.layout.dialog_context_hw_edit);
dialog.setTitle("Note bearbeiten");
edit_mark_name = (EditText)dialog.findViewById(R.id.edit_mark_name);
edit_mark_mark = (EditText)dialog.findViewById(R.id.edit_mark_note);
cmd_save_mark = (Button)dialog.findViewById(R.id.cmd_save_mark);
cmd_close_mark = (Button)dialog.findViewById(R.id.cmd_close_mark);
date_pick_edit = (DatePicker)dialog.findViewById(R.id.date_maturity_mark_edit);
seek_gewichtt = (SeekBar)dialog.findViewById(R.id.seek_edit_gewicht);
seek_gewichtt.setOnSeekBarChangeListener(yourSeekBarListener);
edit_mark_name.setText(name);
edit_mark_mark.setText(mark);
seek_gewichtt.setProgress(gewicht_mark_int);
gewicht_test = (TextView)dialog.findViewById(R.id.lololol);
cmd_save_mark.setOnClickListener(save_mark);
cmd_close_mark.setOnClickListener(close_popup_mark);
break;
}
return dialog;
}
LogCat：第339行是seek_gewichtt.setOnSeekBarChangeListener（yourSeekBarListener）;
02-07 14:52:15.718: D/dalvikvm(11876): GC_EXTERNAL_ALLOC freed 51K, 50% free 2695K/5379K, external 0K/0K, paused 33ms
02-07 14:52:15.761: D/dalvikvm(11876): GC_EXTERNAL_ALLOC freed 4K, 50% free 2698K/5379K, external 13K/523K, paused 32ms
02-07 14:52:20.097: D/dalvikvm(11876): GC_EXTERNAL_ALLOC freed 81K, 47% free 2891K/5447K, external 4220K/4230K, paused 19ms
02-07 14:52:20.113: D/AndroidRuntime(11876): Shutting down VM
02-07 14:52:20.117: W/dalvikvm(11876): threadid=1: thread exiting with uncaught exception (group=0x40235568)
02-07 14:52:20.121: E/AndroidRuntime(11876): FATAL EXCEPTION: main
02-07 14:52:20.121: E/AndroidRuntime(11876): java.lang.NullPointerException
02-07 14:52:20.121: E/AndroidRuntime(11876): at test.marco.notenha.mark.onCreateDialog(mark.java:339)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.app.Activity.onCreateDialog(Activity.java:2506)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.app.Activity.createDialog(Activity.java:885)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.app.Activity.showDialog(Activity.java:2581)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.app.Activity.showDialog(Activity.java:2548)
02-07 14:52:20.121: E/AndroidRuntime(11876): at test.marco.notenha.mark.onContextItemSelected(mark.java:255)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.app.Activity.onMenuItemSelected(Activity.java:2233)
02-07 14:52:20.121: E/AndroidRuntime(11876): at com.android.internal.policy.impl.PhoneWindow$ContextMenuCallback.onMenuItemSelected(PhoneWindow.java:2888)
02-07 14:52:20.121: E/AndroidRuntime(11876): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:143)
02-07 14:52:20.121: E/AndroidRuntime(11876): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:857)
02-07 14:52:20.121: E/AndroidRuntime(11876): at com.android.internal.view.menu.MenuDialogHelper.onClick(MenuDialogHelper.java:138)
02-07 14:52:20.121: E/AndroidRuntime(11876): at com.android.internal.app.AlertController$AlertParams$5.onItemClick(AlertController.java:928)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.widget.AdapterView.performItemClick(AdapterView.java:284)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.widget.ListView.performItemClick(ListView.java:3535)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.widget.AbsListView$PerformClick.run(AbsListView.java:1827)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.os.Handler.handleCallback(Handler.java:587)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.os.Handler.dispatchMessage(Handler.java:92)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.os.Looper.loop(Looper.java:130)
02-07 14:52:20.121: E/AndroidRuntime(11876): at android.app.ActivityThread.main(ActivityThread.java:3703)
02-07 14:52:20.121: E/AndroidRuntime(11876): at java.lang.reflect.Method.invokeNative(Native Method)
02-07 14:52:20.121: E/AndroidRuntime(11876): at java.lang.reflect.Method.invoke(Method.java:507)
02-07 14:52:20.121: E/AndroidRuntime(11876): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
02-07 14:52:20.121: E/AndroidRuntime(11876): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
02-07 14:52:20.121: E/AndroidRuntime(11876): at dalvik.system.NativeStart.main(Native Method)
02-07 14:52:21.484: I/Process(11876): Sending signal. PID: 11876 SIG: 9
答案 0 :(得分：1)
您的SeekBar使用了错误的ID。在您的XML中，它被定义为seek_edit_gewicht，但您正在寻找R.id.seekBar_wertung。试试这个：
seek_gewicht = (SeekBar)dialog.findViewById(R.id.seek_edit_gewicht);
答案 1 :(得分：1)
我不明白。您将显示dialog_context_mark_edit文件中定义的布局。
但是在对话框中，您使用R.layout.dialog_context_mark和R.layout.dialog_context_hw_edit。你能给我们提供文件dialog_context_mark和dialog_context_hw_edit吗？你能插入整个标记类代码吗？