在设置我的列表视图时，我将OverlayItems的Arraylist设置为listview的适配器，因为当我点击列表中的项目时，我想访问Overlayitems附带的地理选择。
然而，这个解决方案给出了一个相当难看的列表视图，因为它没有显示Overlayitems的不同标题，而是像OverlayItem@jiozl26那样。
有没有人知道解决这个问题最简单的方法（既显示标题，又能访问地理位置？）我想我应该使用自定义列表视图执行此操作，但我不确定这是最简单/最有效的方式。
adapter = new ArrayAdapter<OverlayItem>(this, android.R.layout.simple_list_item_1, custom.pinpoints);
listView.setAdapter(adapter);
==>整个代码：
public class Main extends MapActivity implements OnTabChangeListener{
/** Called when the activity is first created. */
private static final String LIST_TAB_TAG = "List";
private static final String MAP_TAB_TAG = "Map";
MapView map;
ListView listView;
TabHost tabHost;
long start;
long stop;
int x, y;
MyLocationOverlay compass;
MyLocationOverlay MyLoc;
MapController controller;
GeoPoint touchedPoint;
Drawable d;
List<Overlay> overlayList;
CustomPinpoint custom;
static Context context;
ArrayAdapter<OverlayItem> adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
tabHost = (TabHost) findViewById(android.R.id.tabhost);
tabHost.setup();
context = getApplicationContext();
listView = (ListView) findViewById(R.id.list);
listView.setEmptyView((TextView) findViewById(R.id.empty));
d = getResources().getDrawable(R.drawable.ic_launcher);
custom = new CustomPinpoint(d,Main.this);
listView.setLongClickable(true);
adapter = new ArrayAdapter<OverlayItem>(this, android.R.layout.simple_list_item_1, custom.pinpoints);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
GeoPoint geoPoint = ((OverlayItem) listView.getAdapter().getItem(position)).getPoint();
if(geoPoint != null) {
map.getController().animateTo(geoPoint);
tabHost.setCurrentTab(1);
}
}
});
listView.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
final AlertDialog alert3 = new AlertDialog.Builder(Main.this).create();
alert3.setTitle("Pick an option.");
alert3.setButton(DialogInterface.BUTTON_POSITIVE,"Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
alert3.setButton(DialogInterface.BUTTON_NEUTRAL,"Modify", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
LayoutInflater factory = LayoutInflater.from(context);
View promptsView = factory.inflate(R.layout.prompts, null);
final AlertDialog alert4 = new AlertDialog.Builder(Main.this).create();
alert4.setView(promptsView);
final EditText userInput1 = (EditText) promptsView.findViewById(R.id.editTextInput1);
final EditText userInput2 = (EditText) promptsView.findViewById(R.id.editTextInput2);
userInput1.setInputType(InputType.TYPE_CLASS_TEXT);
userInput1.setCursorVisible(true);
userInput2.setInputType(InputType.TYPE_CLASS_TEXT);
userInput2.setCursorVisible(true);
alert4.setButton (DialogInterface.BUTTON_NEGATIVE,"Save", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
custom.modifyPinpoint(userInput1.getText().toString(), userInput2.getText().toString(),position);
map.postInvalidate();
}
});
alert4.setButton(DialogInterface.BUTTON_POSITIVE, "Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
});
alert4.show();
}
});
alert3.setButton(DialogInterface.BUTTON_NEGATIVE,"Delete", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
custom.deletePinpoint(position);
adapter.notifyDataSetChanged();
}
});
alert3.show();
return true;
}
});
map = (MapView) findViewById(R.id.mapview);
map.setBuiltInZoomControls(true);
map.postInvalidate();
Touch t = new Touch();
overlayList = map.getOverlays();
overlayList.add(t);
compass = new MyLocationOverlay(Main.this, map);
overlayList.add(compass);
controller = map.getController();
MyLoc = new MyLocationOverlay(Main.this, map);
overlayList.add(MyLoc);
map.postInvalidate();
MyLoc.runOnFirstFix(new Runnable() {
public void run() {
map.getController().animateTo(MyLoc.getMyLocation());
}
});
tabHost.addTab(tabHost.newTabSpec(LIST_TAB_TAG).setIndicator("List").setContent(new TabContentFactory() {
public View createTabContent(String arg0) {
return listView;
}
}));
tabHost.addTab(tabHost.newTabSpec(MAP_TAB_TAG).setIndicator("Map").setContent(new TabContentFactory() {
public View createTabContent(String arg0) {
return map;
}
}));
tabHost.setCurrentTab(1);
tabHost.setCurrentTab(0);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
compass.disableCompass();
super.onPause();
MyLoc.disableMyLocation();
finish();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
compass.enableCompass();
super.onResume();
MyLoc.enableMyLocation();
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
class Touch extends Overlay {
public boolean onTouchEvent(MotionEvent e, MapView m) {
if (e.getAction() == MotionEvent.ACTION_DOWN) {
start = e.getEventTime();
x = (int) e.getX();
y = (int) e.getY();
touchedPoint = map.getProjection().fromPixels(x, y);
}
if (e.getAction() == MotionEvent.ACTION_UP) {
stop = e.getEventTime();
}
if (stop - start > 1200) {
final AlertDialog alert = new AlertDialog.Builder(Main.this).create();
alert.setTitle("Pick an option.");
alert.setButton(DialogInterface.BUTTON_POSITIVE,"Place a pinpoint.", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
LayoutInflater factory = LayoutInflater.from(context);
View promptsView = factory.inflate(R.layout.prompts, null);
final AlertDialog alert2 = new AlertDialog.Builder(Main.this).create();
alert2.setView(promptsView);
final EditText userInput1 = (EditText) promptsView.findViewById(R.id.editTextInput1);
final EditText userInput2 = (EditText) promptsView.findViewById(R.id.editTextInput2);
userInput1.setInputType(InputType.TYPE_CLASS_TEXT);
userInput1.setCursorVisible(true);
userInput2.setInputType(InputType.TYPE_CLASS_TEXT);
userInput2.setCursorVisible(true);
alert2.setButton (DialogInterface.BUTTON_NEGATIVE,"Save", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
OverlayItem overlayItem = new OverlayItem(touchedPoint, userInput1.getText().toString(), userInput2.getText().toString());
custom.insertPinpoint(overlayItem);
overlayList.add(custom);
map.postInvalidate();
}
});
alert2.setButton(DialogInterface.BUTTON_POSITIVE, "Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
});
alert2.show();
}
});
alert.setButton(DialogInterface.BUTTON_NEUTRAL,"Get address.",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
// TODO Auto-generated method stub
Geocoder geocoder = new Geocoder(getBaseContext(), Locale.getDefault());
try{
List<Address> address = geocoder.getFromLocation(touchedPoint.getLatitudeE6() /1E6, touchedPoint.getLongitudeE6()/1E6, 1);
if (address.size() > 0){
String display = "";
for (int i = 0; i < address.get(0).getMaxAddressLineIndex(); i++){
display += address.get(0).getAddressLine(i) + "\n";
}
Toast t3 = Toast.makeText(getBaseContext(), display, Toast.LENGTH_LONG);
t3.show();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
}
}
});
alert.setButton(DialogInterface.BUTTON_NEGATIVE,"Toggle View", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
if (map.isSatellite()){
map.setSatellite(false);
}else{
map.setSatellite(true);
}
}
});
alert.show();
return true;
}
return false;
}
}
public void gpsCurrentLocation()
{
tabHost.setCurrentTab(1);
GeoPoint p = MyLoc.getMyLocation();
if (p == null){
Toast.makeText(Main.this, "Your location wasn't found.", Toast.LENGTH_SHORT).show();
}
else{
map.getController().animateTo(p);
}
}
// Menu XML file (menu.xml)
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.map_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.my_location:
Toast.makeText(Main.this, "Moving To Current location", Toast.LENGTH_SHORT).show();
gpsCurrentLocation();
return true;
case R.id.menu_clear:
custom.clearPinpoint();
adapter.notifyDataSetChanged();
}
return false;
}
public void onTabChanged(String tabId) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分：2)
使用扩展ArrayAdapter<OverlayItem>的自定义数组适配器。您可以使用覆盖getView()方法定义项目视图，以便更好地控制显示内容和方式。有很多关于如何创建自定义数组适配器的教程。例如，请参阅https://devtut.wordpress.com/2011/06/09/custom-arrayadapter-for-a-listview-android/
您看到OverlayItem@jiozl26，因为ArrayAdapter的默认行为是显示数组中每个对象的toString()。
答案 1 :(得分：2)
只需覆盖toString()子类的OverlayItem方法，即可返回此对象的标题。