所以，这是我的代码，它转到外部数据库并在半径范围内检索前25个标记（我不记得它是100或200公里）。
问题是，地图大约需要1.5分钟才能完全加载。
有什么办法可以减少这个加载时间吗？在我看来，这是不可接受的。
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMarkerClickListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapasActivity extends ActionBarActivity {
GoogleMap googleMap;
SharedPreferences pref;
String sLatitude;
String sLongitude;
String sLinguagem;
LocationManager locationManager;
Location location;
ProgressDialog pDialog;
String sLat;
String sLng;
String sTipo;
String id;
TextView tvNome;
TextView tvNext;
RelativeLayout layoutClickable;
LatLng markerLatLng;
Typeface tf;
Typeface tf2;
Marker marker;
MarkerOptions markerOptions;
Drawable d;
String sTransition;
Double dLatitude;
Double dLongitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mapa);
sTransition = "b"; // até contrário ao clickar em algo faz o efeito b
tf = Typeface.createFromAsset(this.getAssets(), "fonts/Lobster.ttf");
tf2 = Typeface.createFromAsset(this.getAssets(),
"fonts/Cabin-Italic.otf");
// TESTEEEEE
d = getResources().getDrawable(R.drawable.ab_background);
getActionBar().setBackgroundDrawable(d);
getActionBar().setLogo(
getResources().getDrawable(R.drawable.logo_degradee));
int actionBarTitle = Resources.getSystem().getIdentifier(
"action_bar_title", "id", "android");
TextView actionBarTitleView = (TextView) getWindow().findViewById(
actionBarTitle);
actionBarTitleView.setTypeface(tf);
getActionBar().setTitle("Mapactivity");
/*********************************************************************************
* INTENTS E PREFS
*********************************************************************************/
pref = getApplicationContext().getSharedPreferences("MyPref",
MODE_PRIVATE);
sLinguagem = pref.getString("LINGUAGEM", null);
sLatitude = pref.getString("LATITUDE", "0");
sLongitude = pref.getString("LONGITUDE", "0");
sTipo = getIntent().getExtras().getString("TIPO");
dLatitude = Double.parseDouble(sLatitude);
dLongitude = Double.parseDouble(sLongitude);
// ******************************************************************************
// TESTES
// ******************************************************************************
id = " Finder";
layoutClickable = (RelativeLayout) findViewById(R.id.layout_mapa_botton);
tvNome = (TextView) findViewById(R.id.tvNomeDoEstabelecimento);
tvNext = (TextView) findViewById(R.id.tvNext);
tvNome.setText(id);
tvNome.setTypeface(tf);
tvNext.setTypeface(tf2);
tvNext.setVisibility(View.INVISIBLE);
/*********************************************************************************
* GOOGLE PLAY
********************************************************************************/
// Getting Google Play availability status
int status = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(getBaseContext());
// Showing status
if (status != ConnectionResult.SUCCESS) {
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this,
requestCode);
dialog.show();
} else {
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
/*********************************************************************************************************************
* PORMENORES PARA O MAPA
***************************************************************************************************************/
googleMap = fm.getMap();
googleMap.setMyLocationEnabled(true);
googleMap.setBuildingsEnabled(true);
googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
googleMap.getUiSettings().setZoomControlsEnabled(true);
// cOISAS PARA TESTES
// ********************************************************
LatLng latLng = new LatLng(dLatitude, dLongitude);
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, 12);
googleMap.animateCamera(cameraUpdate);
googleMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {
@Override
public View getInfoWindow(Marker arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public View getInfoContents(Marker marker) {
View v = getLayoutInflater().inflate(
R.layout.marker_custom_marker_info, null);
TextView tvNomeInfo = (TextView) v
.findViewById(R.id.tvMarkerNome);
TextView tvIdInfo = (TextView) v
.findViewById(R.id.tvMarkerId);
// LatLng llMarker = marker.getPosition();
tvNomeInfo.setText(marker.getTitle());
tvNomeInfo.setTypeface(tf);
tvIdInfo.setText(marker.getSnippet());
tvIdInfo.setVisibility(View.INVISIBLE);
return v;
}
});
// ***************************************************************************
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
/******************************************************************************
* EVENTO DO LAYOUT
*****************************************************************************/
layoutClickable.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (id != "Finder") {
sTransition = "a";
Intent intent = new Intent(MapasActivity.this,
SingleItemView.class);
intent.putExtra("KEY_ID", id);
startActivity(intent);
}
}
});
}
new getAllCustomerstask().execute(new ApiConnectorMapas());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.map_actions, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_search:
sTransition = "c";
Intent i1 = new Intent(this, ServicosListActivity.class);
startActivity(i1);
return true;
case R.id.action_listView:
sTransition = "b";
Intent i2 = new Intent(this, LOJASListActivity.class);
i2.putExtra("TIPO", sTipo);
startActivity(i2);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private class getAllCustomerstask extends
AsyncTask<ApiConnectorMapas, Long, JSONArray> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MapasActivity.this);
pDialog.setTitle(R.string.app_name);
pDialog.setMessage("A localizar lojas ao pé de si...");
pDialog.setCancelable(false);
pDialog.setButton(DialogInterface.BUTTON_NEGATIVE,
"Esconder esta mensagem",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
pDialog.show();
}
protected JSONArray doInBackground(ApiConnectorMapas... params) {
return params[0].GetAllCustomers(sLatitude, sLongitude, sTipo/*
* ,
* sLinguagem
*/);
}
// @SuppressWarnings("null")
@Override
protected void onPostExecute(JSONArray jsonArray) {
/*
* Códigos Para lista::
*
* id name address promotype distance lat lng tipo foto
*/
pDialog.dismiss();
/*
* if (jsonArray!= null){
*/
/**********************************************************************************************************************************
* LAYOUT MARKER
*/
View icon = ((LayoutInflater) getSystemService(MapasActivity.LAYOUT_INFLATER_SERVICE))
.inflate(R.layout.mapa_custom_marker_layout, null);
View iconPromo = ((LayoutInflater) getSystemService(MapasActivity.LAYOUT_INFLATER_SERVICE))
.inflate(R.layout.mapa_custom_promoted_marker_layout, null);
TextView numTxt = (TextView) icon.findViewById(R.id.tvInfoNome);
numTxt.setTypeface(tf2);
List<Marker> markers = new ArrayList<Marker>();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json = null;
try {
json = jsonArray.getJSONObject(i);
Double promotype = json.getDouble("promotype");
numTxt.setText(json.getString("distance") + " km");
if (promotype < 1) {
//numTxt.setText(json.getString("distance") + " km");
Marker marker;
marker = googleMap.addMarker(new MarkerOptions()
.title(json.getString("name"))
.snippet(json.getString("id"))
.position(
new LatLng(json.getDouble("lat"), json
.getDouble("lng")))
// .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE))
.icon(BitmapDescriptorFactory
.fromBitmap(createDrawableFromView(
MapasActivity.this, iconPromo)))
);
googleMap
.setOnMarkerClickListener(new OnMarkerClickListener() {
public boolean onMarkerClick(Marker marker) {
marker.showInfoWindow();
id = marker.getSnippet();
tvNome.setText(marker.getTitle());
tvNext.setVisibility(View.VISIBLE);
return true;
}
});
markers.add(marker);
} else {
//numTxt.setText(json.getString("distance") + " km");
//String sAlpha = "0.45";
//Float fAlpha = Float.parseFloat(sAlpha);
marker = googleMap.addMarker(new MarkerOptions()
.title(json.getString("name"))
.position(
new LatLng(json.getDouble("lat"), json
.getDouble("lng")))
/*
* .icon(BitmapDescriptorFactory.defaultMarker(
* BitmapDescriptorFactory.HUE_ROSE))
* /*.icon(BitmapDescriptorFactory
* .fromResource(R.drawable.pin))
*/
.icon(BitmapDescriptorFactory
.fromBitmap(createDrawableFromView(
MapasActivity.this, icon)))
/*.snippet(json.getString("id")).alpha(fAlpha)*/);
googleMap
.setOnMarkerClickListener(new OnMarkerClickListener() {
public boolean onMarkerClick(Marker marker) {
id = marker.getSnippet();
marker.showInfoWindow();
tvNome.setText(marker.getTitle());
tvNext.setVisibility(View.VISIBLE);
return true;
}
});
markers.add(marker);
}
} catch (JSONException e) {
e.printStackTrace();
}
/*
* } json = jsonArray.getJSONObject(i);
*
* listId.add(json.getString("id"));
* listName.add(json.getString("name"));
* listAddress.add(json.getString("address"));
* listPromo.add(json.getString("promotype"));
* listDistance.add(json.getString("distance"));
* listLat.add(json.getString("lat"));
* listLng.add(json.getString("lng"));
* listTipo.add(json.getString("tipo"));
* listFoto.add(json.getString("foto"));
* listRank.add(json.getString("ranking"));
* listIdd.add(json.getString("id"));
*/
}
}
}
/**********************************************************************************
* CLASS QUE VAI TRANSFORMAR O LAYOUT NUM BITMAP
*/
public static Bitmap createDrawableFromView(Context context, View view) {
DisplayMetrics displayMetrics = new DisplayMetrics();
((Activity) context).getWindowManager().getDefaultDisplay()
.getMetrics(displayMetrics);
view.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
view.measure(displayMetrics.widthPixels, displayMetrics.heightPixels);
view.layout(0, 0, displayMetrics.widthPixels,
displayMetrics.heightPixels);
view.buildDrawingCache();
Bitmap bitmap = Bitmap.createBitmap(view.getMeasuredWidth(),
view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);
return bitmap;
}
@Override
protected void onPause() {
super.onPause();
/*
* sTransition = a - single item- check sTransition = b - back ou
* listview - check sTransition = c - searchview - check
*/
if (sTransition.equals("a")) {
overridePendingTransition(R.anim.para_esq_baixo,
R.anim.para_esq_baixo);
}
if (sTransition.equals("b")) {
overridePendingTransition(R.anim.para_dir_cima,
R.anim.para_dir_baixo);
}// bottom to top
if (sTransition.equals("c")) {
overridePendingTransition(R.anim.from_bottom, R.anim.to_top);
}
}
答案 0 :(得分：0)
有些事情会浮现在脑海中：
您是在模拟器还是真实设备上运行应用程序？ （我希望在模拟器上这很慢）
您正在运行的查询是否正在撤回过多的数据，查询效率低下，或者只是在整个网络中显得很慢？
您可以在每种方法中添加Log语句，以查看您的应用花费最多的时间 - 这将指出您的瓶颈。