[英]Search specific location in Google Maps Android
I have problem with search location in Google Map Android 我在Google Map Android中的搜索位置有问题
here is my code for cari.java 这是我的cari.java代码
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class cari extends com.google.android.maps.MapActivity {
TextView error,pt;
EditText cm;
String i,returnStringLancar,stat;
Geocoder geoCoder;
GeoPoint p;
MapController controller;
MapView map;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search);
pt=(TextView)findViewById(R.id.peta);
cm=(EditText)findViewById(R.id.cariMap);
}
public void clickHandler(View view){
Intent a = null;
switch (view.getId()){
case R.id.show:
geoCoder = new Geocoder(getApplicationContext(),
Locale.getDefault());
List<Address> addresses;
try {
addresses = geoCoder.getFromLocationName(cm.getText().toString(),5);
if(addresses.size() > 0)
{
p = new GeoPoint( (int) (addresses.get(0).getLatitude() * 1E6),
(int) (addresses.get(0).getLongitude() * 1E6));
controller.animateTo(p);
controller.setZoom(12);
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = map.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
map.invalidate();
cm.setText("");
}
else
{
AlertDialog.Builder adb = new AlertDialog.Builder(cari.this);
adb.setTitle("Google Map");
adb.setMessage("Please Provide the Proper Place");
adb.setPositiveButton("Close",null);
adb.show();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
}
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}
and this is my MapOverlay.java 这是我的MapOverlay.java
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.os.Bundle;
class MapOverlay extends com.google.android.maps.Overlay
{
Context context;
GeoPoint p;
public boolean draw(Canvas canvas, MapView mapView,
boolean shadow, long when)
{
super.draw(canvas, mapView, shadow);
//---translate the GeoPoint to screen pixels---
Point screenPts = new Point();
mapView.getProjection().toPixels(p, screenPts);
//---add the marker---
Bitmap bmp = BitmapFactory.decodeResource(
context.getResources(), R.drawable.icon);
canvas.drawBitmap(bmp, screenPts.x, screenPts.y-32, null);
return true;
}
}
the purpose of this program is for search location in Google Map by address (example: 5th Avenue). 该程序的目的是通过地址(例如:第五大道)在Google Map中搜索位置。
but when I deploy this, it show error like this: 但是当我部署它时,它显示如下错误:
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{udin.googlemap2/udin.googlemap2.GoogleMap2}: java.lang.RuntimeException:无法实例化活动ComponentInfo {udin.googlemap2 / udin.googlemap2.GoogleMap2}:
and this: 和这个:
java.lang.ClassNotFoundException: udin.googlemap2.GoogleMap2 in loader dalvik.system.PathClassLoader[/system/framework/com.google.android.maps.jar:/data/app/udin.googlemap2-1.apk] java.lang.ClassNotFoundException:加载程序dalvik.system.PathClassLoader [/system/framework/com.google.android.maps.jar:/data/app/udin.googlemap2-1.apk]中的udin.googlemap2.GoogleMap2]
检查是否在android manifest中给出了<uses-library android:name="com.google.android.maps" />
。没关系。
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