Android 我应该如何更正代码以消除这些“错误”；“未使用的值”；警告？
这些是我收到的错误信息，请告知 未使用字段LocationListActivity.adapter的值Android 我应该如何更正代码以消除这些“错误”；“未使用的值”；警告？,android,eclipse,location,Android,Eclipse,Location,这些是我收到的错误信息，请告知 未使用字段LocationListActivity.adapter的值 public class LocationListActivity extends ExpandableListActivity { private ArrayAdapter<String> adapter = null; private String name; private ArrayList<List<LocationData>> location
public class LocationListActivity extends ExpandableListActivity {
private ArrayAdapter<String> adapter = null;
private String name;
private ArrayList<List<LocationData>> locations; //Array list of all locations
private ArrayList<LocationData> locationList; // locations for each group
private ListView lv1;
private ArrayList<String> locationSection = new ArrayList<String>();
private ArrayList<String> sectionLocations = new ArrayList<String>();
private ArrayList<ArrayList<String>> allLocations = new ArrayList<ArrayList<String>>();
private String titleString;
private ExpandableListAdapter mAdapter;
private Button search;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location_list_activity);
search = (Button)findViewById(R.id.search_button);
search.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(LocationListActivity.this, LocationListSearchActivity.class));
}
});
//PARSE locations.xml
try {
this.locations = new ArrayList<List<LocationData>>();
this.locationList = new ArrayList<LocationData>();
XmlResourceParser xrp = this.getResources().getXml(R.xml.locations);
LocationData currentLocation = null;
while(xrp.getEventType() != XmlResourceParser.END_DOCUMENT) {
currentLocation = new LocationData();
if(xrp.getEventType() == XmlResourceParser.START_TAG) {
if(xrp.getName().equals("section")) {
locationSection.add(xrp.getAttributeValue(null, "title"));
}
else if(xrp.getName().equals("location")) {
currentLocation.setBuilding((xrp.getAttributeValue(null, "building")));
name = xrp.getAttributeValue(null, "name");
sectionLocations.add(name);
currentLocation.setName(name);
currentLocation.setDetailName((xrp.getAttributeValue(null, "detailName")));
currentLocation.setLat(Double.parseDouble(xrp.getAttributeValue(null, "lat")));
currentLocation.setLng(Double.parseDouble(xrp.getAttributeValue(null, "lng")));
currentLocation.setPhone(xrp.getAttributeValue(null, "phone"));
locationList.add(currentLocation);
}
}
else if(xrp.getEventType() == XmlResourceParser.END_TAG) {
if(xrp.getName().equals("section")) {
allLocations.add(new ArrayList<String>(sectionLocations));
sectionLocations.clear();
locations.add(new ArrayList<LocationData>(locationList));
locationList.clear();
}
}
xrp.next();
}
xrp.close();}
catch (XmlPullParserException xppe) {}
catch (IOException e) {}
// Set up our adapter
mAdapter = new MyExpandableListAdapter();
setListAdapter(mAdapter);
}
public class MyExpandableListAdapter extends BaseExpandableListAdapter {
public Object getChild(int groupPosition, int childPosition) {
return allLocations.get(groupPosition).get(childPosition);
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
return allLocations.get(groupPosition).size();
}
public TextView getGenericView() {
// Layout parameters for the ExpandableListView
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 80);
TextView textView = new TextView(LocationListActivity.this);
textView.setLayoutParams(lp);
// Center the text vertically
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
// Set the text starting position
textView.setBackgroundResource(R.drawable.button_click);
textView.setTypeface(null, android.graphics.Typeface.BOLD);
textView.setTextColor(0xFF000000);
textView.setPadding(55, 0, 0, 0);
return textView;
}
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
View convertView, ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getChild(groupPosition, childPosition).toString());
textView.setTypeface(null, android.graphics.Typeface.NORMAL);
return textView;
}
public Object getGroup(int groupPosition) {
return locationSection.get(groupPosition);
}
public int getGroupCount() {
return locationSection.size();
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getGroup(groupPosition).toString());
return textView;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
}
public boolean onChildClick (ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Intent i = new Intent( LocationListActivity.this, LocationInfoActivity.class );
i.putExtra("name", locations.get(groupPosition).get(childPosition).getName());
i.putExtra("building", locations.get(groupPosition).get(childPosition).getBuilding());
i.putExtra("detailName", locations.get(groupPosition).get(childPosition).getDetailName());
i.putExtra("lat", locations.get(groupPosition).get(childPosition).getLat());
i.putExtra("lng", locations.get(groupPosition).get(childPosition).getLng());
i.putExtra("phone", locations.get(groupPosition).get(childPosition).getPhone());
startActivity(i);
return false;
}
@Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = this.getMenuInflater();
inflater.inflate(R.menu.menu_home, menu);
return true;
}
//Called when user selects a menu item;
@Override
public boolean onOptionsItemSelected( MenuItem item ){
switch(item.getItemId()) {
case R.id.menu_search:
startActivity(new Intent(this, LocationListSearchActivity.class));
finish();
break;
case R.id.menu_about:
startActivity(new Intent(this, AboutActivity.class));
finish();
break;
}
return true;
}
public class LocationListActivity extends ExpandableListActivity {
private ArrayAdapter<String> adapter = null;
private String name;
private ArrayList<List<LocationData>> locations; //Array list of all locations
private ArrayList<LocationData> locationList; // locations for each group
private ListView lv1;
private ArrayList<String> locationSection = new ArrayList<String>();
private ArrayList<String> sectionLocations = new ArrayList<String>();
private ArrayList<ArrayList<String>> allLocations = new ArrayList<ArrayList<String>>();
private String titleString;
private ExpandableListAdapter mAdapter;
private Button search;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location_list_activity);
search = (Button)findViewById(R.id.search_button);
search.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(LocationListActivity.this, LocationListSearchActivity.class));
}
});
//PARSE locations.xml
try {
this.locations = new ArrayList<List<LocationData>>();
this.locationList = new ArrayList<LocationData>();
XmlResourceParser xrp = this.getResources().getXml(R.xml.locations);
LocationData currentLocation = null;
while(xrp.getEventType() != XmlResourceParser.END_DOCUMENT) {
currentLocation = new LocationData();
if(xrp.getEventType() == XmlResourceParser.START_TAG) {
if(xrp.getName().equals("section")) {
locationSection.add(xrp.getAttributeValue(null, "title"));
}
else if(xrp.getName().equals("location")) {
currentLocation.setBuilding((xrp.getAttributeValue(null, "building")));
name = xrp.getAttributeValue(null, "name");
sectionLocations.add(name);
currentLocation.setName(name);
currentLocation.setDetailName((xrp.getAttributeValue(null, "detailName")));
currentLocation.setLat(Double.parseDouble(xrp.getAttributeValue(null, "lat")));
currentLocation.setLng(Double.parseDouble(xrp.getAttributeValue(null, "lng")));
currentLocation.setPhone(xrp.getAttributeValue(null, "phone"));
locationList.add(currentLocation);
}
}
else if(xrp.getEventType() == XmlResourceParser.END_TAG) {
if(xrp.getName().equals("section")) {
allLocations.add(new ArrayList<String>(sectionLocations));
sectionLocations.clear();
locations.add(new ArrayList<LocationData>(locationList));
locationList.clear();
}
}
xrp.next();
}
xrp.close();}
catch (XmlPullParserException xppe) {}
catch (IOException e) {}
// Set up our adapter
mAdapter = new MyExpandableListAdapter();
setListAdapter(mAdapter);
}
public class MyExpandableListAdapter extends BaseExpandableListAdapter {
public Object getChild(int groupPosition, int childPosition) {
return allLocations.get(groupPosition).get(childPosition);
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
return allLocations.get(groupPosition).size();
}
public TextView getGenericView() {
// Layout parameters for the ExpandableListView
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 80);
TextView textView = new TextView(LocationListActivity.this);
textView.setLayoutParams(lp);
// Center the text vertically
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
// Set the text starting position
textView.setBackgroundResource(R.drawable.button_click);
textView.setTypeface(null, android.graphics.Typeface.BOLD);
textView.setTextColor(0xFF000000);
textView.setPadding(55, 0, 0, 0);
return textView;
}
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
View convertView, ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getChild(groupPosition, childPosition).toString());
textView.setTypeface(null, android.graphics.Typeface.NORMAL);
return textView;
}
public Object getGroup(int groupPosition) {
return locationSection.get(groupPosition);
}
public int getGroupCount() {
return locationSection.size();
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getGroup(groupPosition).toString());
return textView;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
}
public boolean onChildClick (ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Intent i = new Intent( LocationListActivity.this, LocationInfoActivity.class );
i.putExtra("name", locations.get(groupPosition).get(childPosition).getName());
i.putExtra("building", locations.get(groupPosition).get(childPosition).getBuilding());
i.putExtra("detailName", locations.get(groupPosition).get(childPosition).getDetailName());
i.putExtra("lat", locations.get(groupPosition).get(childPosition).getLat());
i.putExtra("lng", locations.get(groupPosition).get(childPosition).getLng());
i.putExtra("phone", locations.get(groupPosition).get(childPosition).getPhone());
startActivity(i);
return false;
}
@Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = this.getMenuInflater();
inflater.inflate(R.menu.menu_home, menu);
return true;
}
//Called when user selects a menu item;
@Override
public boolean onOptionsItemSelected( MenuItem item ){
switch(item.getItemId()) {
case R.id.menu_search:
startActivity(new Intent(this, LocationListSearchActivity.class));
finish();
break;
case R.id.menu_about:
startActivity(new Intent(this, AboutActivity.class));
finish();
break;
}
return true;
}
public class LocationListActivity extends ExpandableListActivity {
private ArrayAdapter<String> adapter = null;
private String name;
private ArrayList<List<LocationData>> locations; //Array list of all locations
private ArrayList<LocationData> locationList; // locations for each group
private ListView lv1;
private ArrayList<String> locationSection = new ArrayList<String>();
private ArrayList<String> sectionLocations = new ArrayList<String>();
private ArrayList<ArrayList<String>> allLocations = new ArrayList<ArrayList<String>>();
private String titleString;
private ExpandableListAdapter mAdapter;
private Button search;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location_list_activity);
search = (Button)findViewById(R.id.search_button);
search.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(LocationListActivity.this, LocationListSearchActivity.class));
}
});
//PARSE locations.xml
try {
this.locations = new ArrayList<List<LocationData>>();
this.locationList = new ArrayList<LocationData>();
XmlResourceParser xrp = this.getResources().getXml(R.xml.locations);
LocationData currentLocation = null;
while(xrp.getEventType() != XmlResourceParser.END_DOCUMENT) {
currentLocation = new LocationData();
if(xrp.getEventType() == XmlResourceParser.START_TAG) {
if(xrp.getName().equals("section")) {
locationSection.add(xrp.getAttributeValue(null, "title"));
}
else if(xrp.getName().equals("location")) {
currentLocation.setBuilding((xrp.getAttributeValue(null, "building")));
name = xrp.getAttributeValue(null, "name");
sectionLocations.add(name);
currentLocation.setName(name);
currentLocation.setDetailName((xrp.getAttributeValue(null, "detailName")));
currentLocation.setLat(Double.parseDouble(xrp.getAttributeValue(null, "lat")));
currentLocation.setLng(Double.parseDouble(xrp.getAttributeValue(null, "lng")));
currentLocation.setPhone(xrp.getAttributeValue(null, "phone"));
locationList.add(currentLocation);
}
}
else if(xrp.getEventType() == XmlResourceParser.END_TAG) {
if(xrp.getName().equals("section")) {
allLocations.add(new ArrayList<String>(sectionLocations));
sectionLocations.clear();
locations.add(new ArrayList<LocationData>(locationList));
locationList.clear();
}
}
xrp.next();
}
xrp.close();}
catch (XmlPullParserException xppe) {}
catch (IOException e) {}
// Set up our adapter
mAdapter = new MyExpandableListAdapter();
setListAdapter(mAdapter);
}
public class MyExpandableListAdapter extends BaseExpandableListAdapter {
public Object getChild(int groupPosition, int childPosition) {
return allLocations.get(groupPosition).get(childPosition);
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
return allLocations.get(groupPosition).size();
}
public TextView getGenericView() {
// Layout parameters for the ExpandableListView
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 80);
TextView textView = new TextView(LocationListActivity.this);
textView.setLayoutParams(lp);
// Center the text vertically
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
// Set the text starting position
textView.setBackgroundResource(R.drawable.button_click);
textView.setTypeface(null, android.graphics.Typeface.BOLD);
textView.setTextColor(0xFF000000);
textView.setPadding(55, 0, 0, 0);
return textView;
}
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
View convertView, ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getChild(groupPosition, childPosition).toString());
textView.setTypeface(null, android.graphics.Typeface.NORMAL);
return textView;
}
public Object getGroup(int groupPosition) {
return locationSection.get(groupPosition);
}
public int getGroupCount() {
return locationSection.size();
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getGroup(groupPosition).toString());
return textView;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
}
public boolean onChildClick (ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Intent i = new Intent( LocationListActivity.this, LocationInfoActivity.class );
i.putExtra("name", locations.get(groupPosition).get(childPosition).getName());
i.putExtra("building", locations.get(groupPosition).get(childPosition).getBuilding());
i.putExtra("detailName", locations.get(groupPosition).get(childPosition).getDetailName());
i.putExtra("lat", locations.get(groupPosition).get(childPosition).getLat());
i.putExtra("lng", locations.get(groupPosition).get(childPosition).getLng());
i.putExtra("phone", locations.get(groupPosition).get(childPosition).getPhone());
startActivity(i);
return false;
}
@Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = this.getMenuInflater();
inflater.inflate(R.menu.menu_home, menu);
return true;
}
//Called when user selects a menu item;
@Override
public boolean onOptionsItemSelected( MenuItem item ){
switch(item.getItemId()) {
case R.id.menu_search:
startActivity(new Intent(this, LocationListSearchActivity.class));
finish();
break;
case R.id.menu_about:
startActivity(new Intent(this, AboutActivity.class));
finish();
break;
}
return true;
}
公共类LocationListActivity扩展了ExpandableListActivity{
专用ArrayAdapter适配器=null；
私有字符串名称；
私有ArrayList位置；//所有位置的数组列表
私有ArrayList locationList；//每个组的位置
私有ListView lv1；
private ArrayList locationSection=新建ArrayList（）；
private ArrayList sectionLocations=new ArrayList（）；
private ArrayList allLocations=new ArrayList（）；
私人字符串标题；
私有可扩展列表适配器mAdapter；
私人按钮搜索；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.location\u list\u活动）；
search=（按钮）findviewbyd（R.id.search_按钮）；
search.setOnClickListener（新的OnClickListener（）{
公共void onClick（视图v）{
startActivity（新意图（LocationListActivity.this、LocationListSearchActivity.class））；
}
});
//解析locations.xml
试试{
this.locations=新的ArrayList（）；
this.locationList=新的ArrayList（）；
XmlResourceParser xrp=this.getResources（）.getXml（R.xml.locations）；
LocationData currentLocation=null；
while（xrp.getEventType（）！=XmlResourceParser.END_文档）{
currentLocation=新位置数据（）；
if（xrp.getEventType（）==XmlResourceParser.START_标记）{
if（xrp.getName（）.equals（“节”））{
locationSection.add（xrp.getAttributeValue（null，“title”）；
}
else if（xrp.getName（）.equals（“位置”））{
currentLocation.setBuilding（（xrp.getAttributeValue（null，“building”））；
name=xrp.getAttributeValue（null，“name”）；
节位置。添加（名称）；
currentLocation.setName（名称）；
currentLocation.setDetailName（（xrp.getAttributeValue（null，“detailName”））；
currentLocation.setLat（Double.parseDouble（xrp.getAttributeValue（null，“lat”））；
currentLocation.setLng（Double.parseDouble（xrp.getAttributeValue（null，“lng”））；
currentLocation.setPhone（xrp.getAttributeValue（null，“phone”）；
locationList.add（当前位置）；
}
}
else if（xrp.getEventType（）==XmlResourceParser.END_标记）{
if（xrp.getName（）.equals（“节”））{
添加（新的ArrayList（sectionLocations））；
sectionLocations.clear（）；
添加（新的ArrayList（locationList））；
locationList.clear（）；
}
}
xrp.next（）；
}
xrp.close（）；}
catch（XmlPullParserException xppe）{}
捕获（IOE）{}
//设置适配器
mAdapter=新的MyExpandableListAdapter（）；
setListAdapter（mAdapter）；
}
公共类MyExpandableListAdapter扩展了BaseExpandableListAdapter{
公共对象getChild（int-groupPosition，int-childPosition）{
返回allLocations.get（groupPosition）.get（childPosition）；
}
公共长getChildId（int-groupPosition，int-childPosition）{
返回子位置；
}
公共整数getChildrenCount（整数组位置）{
返回allLocations.get（groupPosition.size（）；
}
公共文本视图getGenericView（）{
//ExpandableListView的布局参数
AbsListView.LayoutParams lp=新的AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_父对象，80）；
TextView TextView=新的TextView（LocationListActivity.this）；
textView.setLayoutParams（lp）；
//将文本垂直居中
textView.setGravity（Gravity.CENTER|u VERTICAL | Gravity.LEFT）；
//设置文本起始位置
textView.setBackgroundResource（R.drawable.button\u click）；
setTypeface（null，android.graphics.Typeface.BOLD）；
textView.setTextColor（0xFF000000）；
setPadding（55,0,0,0）；
返回文本视图；
}
公共视图getChildView（int-groupPosition、int-childPosition、boolean-isLastChild、，
视图（视图、视图组父级）{
TextView TextView=getGenericView（）；
setText（getChild（groupPosition，childPosition.toString（））；
setTypeface（null，android.graphics.Typeface.NORMAL）；
返回文本视图；
}
公共对象getGroup（int-groupPosition）{
返回位置section.get（groupPosition）；
}
public int getGroupCount（）{
返回位置section.size（）；
}
公共长getGroupId（int-groupPosition）{
返回组位置；
}
公共视图getGroupView（int-groupPosition、布尔值isExpanded、视图convertView、，
视图组（父级）{
TextView TextView=getGenericView（）；
setText（getGroup（groupPosition.toString（））；
返回文本视图；
}
公共布尔值isChildSelectable（int-groupPosition，int-childPosition）{
返回true；
}
公共布尔表ID（）{
返回true；
}
}
公共布尔onChildClick（ExpandableListView父视图、视图v、int-groupPosition、int-childPosition、长id）{
意图i=新意图（LocationListActivity.this，LocationInfoActivity.class）；
i、 putExtra（“name”，locations.get（groupPosition.get（childPosition.getName（））；
i、 putExtra（“building”，locations.get（groupPosition）.get（childPosition.getBuilding（））；
i、 putExtra（“detailName”，locations.get（groupPosition）.get（childPosition.getDetailName（））；