java一直使用ListView和适配器
嗯，我试着做一个屏幕，需要几个字段，然后，它将信息发送到我的服务器。代码可以工作，我可以插入，但现在，我正试图用一个复选框选择器为我的应用程序的类组完成屏幕
问题是，我在不同的课程中有不同数量的小组，所以我必须动态地做
我工作的班级是这个。意见之间的代码是失败的地方
public class NuevaTarea extends Activity {
EditText nombretarea;
DatePicker fechainicio, fechafin;
ExpandableListView listagrupos;
Button crear;
TimePicker horainicio, horafin;
ProgressDialog pDialog;
Httppostaux post;
CheckBox op1, op2, op3, op4, op5;
JSONArray Grupos;
ArrayList<PostData> data;
PostAdapter adapter;
ListView lista;
@SuppressWarnings("null")
public void onCreate(Bundle savedInstanceState) { {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_insertatarea);
nombretarea = (EditText) findViewById(R.id.editText1);
fechainicio = (DatePicker) findViewById(R.id.datePicker1);
fechafin = (DatePicker) findViewById(R.id.datePicker2);
listagrupos = (ExpandableListView) findViewById(R.id.expandableListView1);
crear = (Button) findViewById(R.id.buttoncrear);
horainicio = (TimePicker) findViewById(R.id.timePicker1);
horafin = (TimePicker) findViewById(R.id.timePicker2);
op1 = (CheckBox) findViewById(R.id.checkBox1);
op2 = (CheckBox) findViewById(R.id.checkBox2);
op3 = (CheckBox) findViewById(R.id.checkBox3);
op4 = (CheckBox) findViewById(R.id.checkBox4);
op5 = (CheckBox) findViewById(R.id.checkBox5);
//////////////// Grupos
Log.d("Grupos", "Previo Inicio");
if ( savedInstanceState == null) {
Log.d("Grupos", "SavedInstance == NULL");
Log.d("Todos los Grupos", "ARRAY GRUPOS = " + Constantes.cargainfogrupos);
//new asynccargagrupos().execute();
Log.d("Todos los Grupos", "ARRAY GRUPOS = " + Constantes.cargainfogrupos);
data = new ArrayList<PostData>();
if ( Constantes.cargainfogrupos != null) {
Log.d("Grupos", "Grupos != NULL");
Log.d("Grupos", "Dentro del WHILE");
String tex;
try {
Log.d("Grupos", "Dentro del Try");
for ( int i = 0; i < Constantes.cargainfogrupos.length(); i++){
Log.d("Grupos", "Dentro del For");
JSONObject jsonObject = Constantes.cargainfogrupos.getJSONObject(i);
tex = jsonObject.getString("nombregrupo");
data.add(new PostData(tex, false));
Log.d("Grupos", "Primera Vista a data" + data);
}
Log.d("Grupos", "Version de Data que paso a Adapter" + data);
adapter = new PostAdapter(NuevaTarea.this, data);
}
catch (Exception e){
}
}
}else {
Log.d("Grupos", "ELSE");
data = savedInstanceState.getParcelableArrayList("saveddata");
adapter = new PostAdapter(NuevaTarea.this, data);
}
ListView lv = (ListView) findViewById(安卓.R.id.list);
lv.setAdapter(adapter);
/////////////////// GRUPOS
我的XML文件是
<ScrollView
安卓:layout_width="match_parent"
安卓:layout_height="match_parent" >
<LinearLayout
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:orientation="vertical">
<TextView
安卓:id="@+id/textView1"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Nombre Tarea" />
<EditText
安卓:id="@+id/editText1"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:ems="10" >
</EditText>
<TextView
安卓:id="@+id/textView4"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Tipo de Tarea" />
<CheckBox
安卓:id="@+id/checkBox1"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Examen Práctico Parcial" />
<CheckBox
安卓:id="@+id/checkBox2"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Examen Práctico Final" />
<CheckBox
安卓:id="@+id/checkBox3"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Examen Teórico Parcial" />
<CheckBox
安卓:id="@+id/checkBox4"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Exament Teórico Final" />
<CheckBox
安卓:id="@+id/checkBox5"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Entregable" />
<TextView
安卓:id="@+id/textView2"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Fecha de Inicio" />
<TimePicker
安卓:id="@+id/timePicker1"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content" />
<DatePicker
安卓:id="@+id/datePicker1"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content" />
<TextView
安卓:id="@+id/FechaFinalizacion"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="TextView" />
<TimePicker
安卓:id="@+id/timePicker2"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content" />
<DatePicker
安卓:id="@+id/datePicker2"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content" />
<TextView
安卓:id="@+id/textView3"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Grupo" />
<ExpandableListView
安卓:id="@+id/expandableListView1"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content" >
</ExpandableListView>
<!-- CHECKBOXs -->
<RelativeLayout
安卓:id="@+id/LinearLayout1"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:background="#999999"
安卓:padding="2dp" >
<CheckBox
安卓:id="@+id/leido"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:layout_centerVertical="true"
安卓:focusable="false" />
<TextView
安卓:id="@+id/tvTitulo"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:layout_centerVertical="true"
安卓:layout_toRightOf="@id/leido"
安卓:text="Titulo del post"
安卓:textAppearance="?安卓:attr/textAppearanceMedium" />
<ListView
安卓:id="@+id/listView1"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content" >
</ListView>
</RelativeLayout>
<!-- CHECKBOXs -->
<Button
安卓:id="@+id/buttoncrear"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:text="Crea Tarea" />
</LinearLayout>
</ScrollView>
</LinearLayout>
我使用了两个外部类，PostData和PostAdapter
public class PostData implements Parcelable{
private String titulo;
private boolean leido;
public PostData(String equip, boolean checked) {
this.titulo = equip;
this.leido = checked;
}
public PostData(Parcel in){
this.titulo= in.readString();
this.leido = in.readInt() == 1 ? true:false;
}
public void setChecked(boolean value) {
this.leido = value;
}
public boolean getChecked() {
return leido;
}
public String getEquipos() {
return titulo;
}
public void setEquipos(String equipos) {
this.titulo = equipos;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(getEquipos());
dest.writeInt(getChecked() ? 1 : 0);
}
public static final Parcelable.Creator<PostData> CREATOR = new Parcelable.Creator<PostData>() {
public PostData createFromParcel(Parcel in) {
return new PostData(in);
}
public PostData[] newArray(int size) {
return new PostData[size];
}
};
这是我班的PostAdapter
public class PostAdapter extends BaseAdapter {
static class ViewHolder
{
TextView tvFecha_pub;
TextView tvtitulo_post;
CheckBox cb;
}
private static final String TAG = "CustomAdapter";
private static int convertViewCounter = 0;
private ArrayList<PostData> data;
private LayoutInflater inflater = null;
public PostAdapter(Context c, ArrayList<PostData> d)
{
Log.v(TAG, "Constructing CustomAdapter");
this.data = d;
inflater = LayoutInflater.from(c);
}
@Override
public int getCount()
{
Log.v(TAG, "in getCount()");
return data.size();
}
@Override
public Object getItem(int position)
{
Log.v(TAG, "in getItem() for position " + position);
return data.get(position);
}
@Override
public long getItemId(int position)
{
Log.v(TAG, "in getItemId() for position " + position);
return position;
}
@Override
public int getViewTypeCount()
{
Log.v(TAG, "in getViewTypeCount()");
return 1;
}
@Override
public int getItemViewType(int position)
{
Log.v(TAG, "in getItemViewType() for position " + position);
return 0;
}
@Override
public void notifyDataSetChanged()
{
super.notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
Log.v(TAG, "in getView for position " + position + ", convertView is "
+ ((convertView == null) ? "null" : "being recycled"));
if (convertView == null)
{
convertView = inflater.inflate(R.layout.activity_insertatarea, null);
convertViewCounter++;
Log.v(TAG, convertViewCounter + " convertViews have been created");
holder = new ViewHolder();
holder.tvtitulo_post = (TextView) convertView
.findViewById(R.id.tvTitulo);
holder.cb = (CheckBox) convertView.findViewById(R.id.leido);
holder.cb.setOnClickListener(checkListener);
convertView.setTag(holder);
} else
holder = (ViewHolder) convertView.getTag();
// Para porde hacer click en el checkbox
PostData d = (PostData) getItem(position);
holder.cb.setTag(d);
// Setting all values in listview
holder.tvtitulo_post.setText(data.get(position).getEquipos());
holder.cb.setChecked(data.get(position).getChecked());
return convertView;
}
public void setCheck(int position)
{
PostData d = data.get(position);
d.setChecked(!d.getChecked());
notifyDataSetChanged();
}
public void checkAll(boolean state)
{
for (int i = 0; i < data.size(); i++)
data.get(i).setChecked(state);
}
public void cancelSelectedPost()
{
int i = 0;
while (i < getCount())
{
if (data.get(i).getChecked())
{
data.remove(data.indexOf(data.get(i)));
} else
i++;
}
notifyDataSetChanged();
}
public boolean haveSomethingSelected()
{
for (int i = 0; i < data.size(); i++)
if (data.get(i).getChecked())
return true;
return false;
}
/**
* Este método es para poder seleccionar una fila directamente con el
* checkbox en lugar de tener que pulsar en la liste en sí
*/
private OnClickListener checkListener = new OnClickListener()
{
@Override
public void onClick(View v)
{
PostData d = (PostData) v.getTag();
d.setChecked(!d.getChecked());
}
};
}
我被这个错误日志困住了
07-14 20:34:52.972: E/AndroidRuntime(5961): FATAL EXCEPTION: main
07-14 20:34:52.972: E/AndroidRuntime(5961): java.lang.ClassCastException: 安卓.widget.LinearLayout cannot be cast to 安卓.widget.CalendarView$WeekView
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.CalendarView.onScroll(CalendarView.java:1183)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.CalendarView.access$900(CalendarView.java:76)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.CalendarView$2.onScroll(CalendarView.java:1075)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.AbsListView.invokeOnItemScrollListener(AbsListView.java:1340)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.ListView.layoutChildren(ListView.java:1762)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.AbsListView.onLayout(AbsListView.java:2012)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.onLayout(LinearLayout.java:1434)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.FrameLayout.onLayout(FrameLayout.java:448)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1660)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.onLayout(LinearLayout.java:1436)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.FrameLayout.onLayout(FrameLayout.java:448)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.onLayout(LinearLayout.java:1434)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.FrameLayout.onLayout(FrameLayout.java:448)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.ScrollView.onLayout(ScrollView.java:1459)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.LinearLayout.onLayout(LinearLayout.java:1434)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.FrameLayout.onLayout(FrameLayout.java:448)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at com.安卓.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:349)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.widget.FrameLayout.onLayout(FrameLayout.java:448)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.View.layout(View.java:14289)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewGroup.layout(ViewGroup.java:4562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewRootImpl.performLayout(ViewRootImpl.java:1976)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1730)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.Choreographer.doCallbacks(Choreographer.java:562)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.Choreographer.doFrame(Choreographer.java:532)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.os.Handler.handleCallback(Handler.java:730)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.os.Handler.dispatchMessage(Handler.java:92)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.os.Looper.loop(Looper.java:137)
07-14 20:34:52.972: E/AndroidRuntime(5961): at 安卓.app.ActivityThread.main(ActivityThread.java:5103)
07-14 20:34:52.972: E/AndroidRuntime(5961): at java.lang.reflect.Method.invokeNative(Native Method)
07-14 20:34:52.972: E/AndroidRuntime(5961): at java.lang.reflect.Method.invoke(Method.java:525)
07-14 20:34:52.972: E/AndroidRuntime(5961): at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
07-14 20:34:52.972: E/AndroidRuntime(5961): at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-14 20:34:52.972: E/AndroidRuntime(5961): at dalvik.system.NativeStart.main(Native Method)
07-14 20:39:55.014: E/AndroidRuntime(5993): FATAL EXCEPTION: main
07-14 20:39:55.014: E/AndroidRuntime(5993): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.PFC.pablo/com.PFC.pablo.Cursos}: java.lang.NullPointerException
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.ActivityThread.access$600(ActivityThread.java:141)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.os.Handler.dispatchMessage(Handler.java:99)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.os.Looper.loop(Looper.java:137)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.ActivityThread.main(ActivityThread.java:5103)
07-14 20:39:55.014: E/AndroidRuntime(5993): at java.lang.reflect.Method.invokeNative(Native Method)
07-14 20:39:55.014: E/AndroidRuntime(5993): at java.lang.reflect.Method.invoke(Method.java:525)
07-14 20:39:55.014: E/AndroidRuntime(5993): at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
07-14 20:39:55.014: E/AndroidRuntime(5993): at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-14 20:39:55.014: E/AndroidRuntime(5993): at dalvik.system.NativeStart.main(Native Method)
07-14 20:39:55.014: E/AndroidRuntime(5993): Caused by: java.lang.NullPointerException
07-14 20:39:55.014: E/AndroidRuntime(5993): at com.PFC.pablo.Cursos.agregarFilasTabla(Cursos.java:113)
07-14 20:39:55.014: E/AndroidRuntime(5993): at com.PFC.pablo.Cursos.onCreate(Cursos.java:74)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.Activity.performCreate(Activity.java:5133)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
07-14 20:39:55.014: E/AndroidRuntime(5993): at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
07-14 20:39:55.014: E/AndroidRuntime(5993): ... 11 more
当我尝试加载活动时，一切都正常，甚至可以很好地完成NuevaTarea。java for loop可以很好地获取数据，但这是不可靠的。具体来说，从这里到那里，它不会通过
Log.d("Grupos", "Version de Data que paso a Adapter" + data);
adapter = new PostAdapter(NuevaTarea.this, data);
知道吗
共 (0) 个答案