मैं विस्तार ListView उदाहरण शुद्धjava.lang.UnsupportedOperationException: addView (देखें, LayoutParams) AdapterView
गतिविधि पर पाया उपयोग कर रहा हूँ:
public class ExpandableListViewActivity extends ExpandableListActivity {
/**
* strings for group elements
*/
static final String arrGroupelements[] = { "India", "Australia", "England",
"South Africa" };
/**
* strings for child elements
*/
static final String arrChildelements[][] = {
{ "Sachin Tendulkar", "Raina", "Dhoni", "Yuvi" },
{ "Ponting", "Adam Gilchrist", "Michael Clarke" },
{ "Andrew Strauss", "kevin Peterson", "Nasser Hussain" },
{ "Graeme Smith", "AB de villiers", "Jacques Kallis" } };
DisplayMetrics metrics;
int width;
ExpandableListView expList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
expList = getExpandableListView();
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
width = metrics.widthPixels;
// this code for adjusting the group indicator into right side of the
// view
expList.setIndicatorBounds(width - GetDipsFromPixel(50), width
- GetDipsFromPixel(10));
expList.setAdapter(new ExpAdapter(this));
expList.setOnGroupExpandListener(new OnGroupExpandListener() {
public void onGroupExpand(int groupPosition) {
Log.e("onGroupExpand", "OK");
}
});
expList.setOnGroupCollapseListener(new OnGroupCollapseListener() {
public void onGroupCollapse(int groupPosition) {
Log.e("onGroupCollapse", "OK");
}
});
expList.setOnChildClickListener(new OnChildClickListener() {
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Log.e("OnChildClickListener", "OK");
return false;
}
});
}
public int GetDipsFromPixel(float pixels) {
// Get the screen's density scale
final float scale = getResources().getDisplayMetrics().density;
// Convert the dps to pixels, based on density scale
return (int) (pixels * scale + 0.5f);
}
}
एडाप्टर:
public class ExpAdapter extends BaseExpandableListAdapter {
private Context myContext;
public ExpAdapter(Context context) {
myContext = context;
}
public Object getChild(int groupPosition, int childPosition) {
return null;
}
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.child_row, null);
}
TextView tvPlayerName = (TextView) convertView
.findViewById(R.id.tvPlayerName);
tvPlayerName
.setText(ExpandableListViewActivity.arrChildelements[groupPosition][childPosition]);
return convertView;
}
public int getChildrenCount(int groupPosition) {
return ExpandableListViewActivity.arrChildelements[groupPosition].length;
}
public Object getGroup(int groupPosition) {
return null;
}
public int getGroupCount() {
return ExpandableListViewActivity.arrGroupelements.length;
}
public long getGroupId(int groupPosition) {
return 0;
}
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.group_row, null);
}
TextView tvGroupName = (TextView) convertView
.findViewById(R.id.tvGroupName);
tvGroupName
.setText(ExpandableListViewActivity.arrGroupelements[groupPosition]);
return convertView;
}
public boolean hasStableIds() {
return false;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
main.xml:
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ExpandableListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:groupIndicator="@drawable/group_indicator" >
<TextView
android:id="@+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="No Items" >
</TextView>
</ExpandableListView>
</LinearLayout>
मैं इस समाधान की कोशिश की है, लेकिन काम नहीं किया :(
Android: Custom ListAdapter extending BaseAdapter crashes on application launch
इसके अशक्त inflater.inflate (R.layout.group_row, "गलत" पर एक तिहाई पैरामीटर जोड़ने के लिए, कहा, झूठे); एक XML लेआउट में AdapterView
बच्चों (जैसे ExpandableListView
) नहीं हो सकता है की
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ExpandableListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:groupIndicator="@drawable/group_indicator" >
</ExpandableListView>
<TextView
android:id="@+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="No Items" >
</TextView>
</LinearLayout>
उपवर्गों (जैसे आप अपने लेआउट में किया था):
क्या यह गतिविधि उस सभी कोड में है? दूसरे प्रश्न का कोड 'inflater.inflate (R.layout.group_row, parent, false) है;' – Luksprog
क्षमा करें, मैंने आपकी टिप्पणी नहीं समझा .... लेकिन जब मैं लॉग का उपयोग करके डीबगिंग कर रहा था, तो त्रुटि setContentView (R के साथ है .layout.main) गतिविधि में ... इसलिए मैंने प्रश्न में main.xml चिपकाया ... क्या आप मदद कर सकते हैं? –