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Ich erstellen Multilevel erweiterbare Listenansicht mit Listenansicht. So will ich Indikator der Listenansicht geändert, wenn ich darauf klicke. Ich habe zwei PNG-Bilder im Zeichnungsordner. Das Klickereignis funktioniert nicht richtig. Wenn ich auf das Minuszeichen klicke, komme ich nicht. Ich meine this. meine HaupttätigkeitProblem mit erweiterbaren Listview Indikator
public class MainActivity extends Activity {
List<NLevelItem> lists;
ListView listView;
RequestQueue requestQueue1, requestQueue2;
int[] firstcatid = null,secondcatid = null;
String firsttitle[] = null,secondtitle[] = null;
int j = 0;
//ArrayList<Group> list,list2,list3;
NLevelItem parent;
Boolean b=false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView1);
lists = new ArrayList<NLevelItem>();
// Random rng = new Random();
final LayoutInflater inflater = LayoutInflater.from(this);
requestQueue1= Volley.newRequestQueue(this);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, "http://www.fasr.com/cntrldata/ezproductfristcategory.php",
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
//list = new ArrayList<Group>();
JSONArray ja = response.getJSONArray("hi");
JSONArray ja2 = response.getJSONArray("hi2");
JSONArray ja3 = response.getJSONArray("hi3");
firsttitle = new String[ja.length()];
firstcatid = new int[ja.length()];
JSONObject jsonObject2 = null, jsonObject3 = null, jsonObject;
for (int i = 0; i < ja.length(); i++) {
jsonObject = ja.getJSONObject(i);
// Log.e("hie",jsonObject2.getInt("second_category_id")+"");
//jsonObject3 = ja3.getJSONObject(i);
firstcatid[i] = jsonObject.getInt("first_category_id");
firsttitle[i] = jsonObject.getString("first_category_name");
}
secondcatid = new int[ja2.length()];
for (int i = 0; i < ja2.length(); i++) {
jsonObject2 = ja2.getJSONObject(i);
secondcatid[i] = jsonObject2.getInt("second_category_id");
}
for (int i = 0; i < ja.length(); i++) {
final NLevelItem grandParent = new NLevelItem(new SomeObject(firsttitle[i]), null, new NLevelView() {
@Override
public View getView(NLevelItem item) {
final View view = inflater.inflate(R.layout.list_item, null);
TextView tv = (TextView) view.findViewById(R.id.textView);
final ImageView iv=(ImageView)view.findViewById(R.id.imageView);
//tv.setBackgroundColor(Color.GREEN);
iv.setVisibility(View.VISIBLE);
/*
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"hello",Toast.LENGTH_SHORT).show();
if(!b){
iv.setBackgroundResource(R.drawable.ic_action_minus);
b=true;
}else {
b=false;
iv.setBackgroundResource(R.drawable.ic_action_add);
}
}
});*/
String name = (String) ((SomeObject) item.getWrappedObject()).getName();
tv.setText(name);
return view;
}
});
lists.add(grandParent);
//int numChildren = rng.nextInt(4) + 1;
for (int j = 0; j < ja2.length(); j++) {
jsonObject2 = ja2.getJSONObject(j);
if (firstcatid[i] == jsonObject2.getInt("first_category_id")) {
parent = new NLevelItem(new SomeObject(jsonObject2.getString("second_category_name")), grandParent, new NLevelView() {
@Override
public View getView(NLevelItem item) {
View view = inflater.inflate(R.layout.list_item, null);
TextView tv = (TextView) view.findViewById(R.id.textView);
//tv.setBackgroundColor(Color.YELLOW);
tv.setPadding(20,0,0,0);
String name = (String) ((SomeObject) item.getWrappedObject()).getName();
tv.setText(name);
return view;
}
});
lists.add(parent); } // int grandChildren = rng.nextInt(5) + 1;
for (int k = 0; k < ja3.length(); k++) {
jsonObject3 = ja3.getJSONObject(k);
if (secondcatid[j] == jsonObject3.getInt("second_category_id")) {
NLevelItem child = new NLevelItem(new SomeObject(jsonObject3.getString("third_category_name")), parent, new NLevelView() {
@Override
public View getView(NLevelItem item) {
View view = inflater.inflate(R.layout.list_item, null);
TextView tv = (TextView) view.findViewById(R.id.textView);
//tv.setBackgroundColor(Color.GRAY);
tv.setPadding(40,0,0,0);
String name = (String) ((SomeObject) item.getWrappedObject()).getName();
tv.setText(name);
return view;
}
});
lists.add(child);}
}
}
}
NLevelAdapter adapter = new NLevelAdapter(lists);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
((NLevelAdapter) listView.getAdapter()).toggle(arg2);
((NLevelAdapter) listView.getAdapter()).getFilter().filter();
}
});
// Toast.makeText(getApplicationContext(),url[2],Toast.LENGTH_SHORT).show();
//output.setText(data);
//ExpListItems = list;
// ExpAdapter = new ExpandListAdapter(getApplicationContext(), ExpListItems);
// ExpandList.setAdapter(ExpAdapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", error.toString());
}
}
);
requestQueue1.add(jsonObjectRequest);
}
class SomeObject {
public String name;
public SomeObject(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
mein listitem xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listItemContainer">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textSize="15sp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:textColor="#020202" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView"
android:visibility="invisible"
android:layout_gravity="right"
android:layout_marginLeft="5dp"
android:src="@drawable/ic_action_add"
android:layout_alignParentEnd="false"
android:layout_alignParentRight="true" />
</RelativeLayout>
my pic ist 
Ich tat das früher, aber keine Verwendung.Anyway thanks –