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我想獲取一個位置的地址。但該應用程序不顯示任何內容，只有黑屏。安卓谷歌地圖錯誤/地理編碼器類給錯誤
我檢查了我的Key，Android Manifest文件。一切就位。
package in.isuru.maps;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.Overlay;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.MotionEvent;
import android.widget.Toast;
public class Main extends MapActivity {
MapView map;
long start;
long stop;
MyLocationOverlay compass;
MapController controller;
GeoPoint touchPoint;
int x, y;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
map = (MapView)findViewById(R.id.map_view_main);
map.setBuiltInZoomControls(true);
Touchy t = new Touchy();
List<Overlay> overlayList = map.getOverlays();
overlayList.add(t);
compass = new MyLocationOverlay(Main.this, map);
overlayList.add(compass);
//controller = map.getController();
//GeoPoint point = new GeoPoint(7865444, 79819940);
//controller.animateTo(point);
//controller.setZoom(6);
}
@Override
protected void onPause() {
compass.disableCompass();
super.onPause();
}
@Override
protected void onResume() {
compass.enableCompass();
super.onResume();
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
class Touchy 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();
touchPoint = map.getProjection().fromPixels(x, y);
}
if(e.getAction() == MotionEvent.ACTION_UP){
stop = e.getEventTime();
}
if(stop - start > 1500){
AlertDialog alert = new AlertDialog.Builder(Main.this).create();
alert.setTitle("Pick an Option");
alert.setMessage("Set the Place");
alert.setButton("Place a Pin", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
alert.setButton2("Get Address", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
Geocoder geocoder = new Geocoder(getBaseContext(), Locale.getDefault());
try{
List<Address> address = geocoder.getFromLocation(touchPoint.getLatitudeE6()/1E6, touchPoint.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 t = Toast.makeText(getBaseContext(), display, Toast.LENGTH_LONG);
t.show();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
}
}
});
alert.setButton3("Place a Pin", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
alert.show();
return true;
}
return false;
}
}
}
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="in.isuru.maps"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<uses-library android:name="com.google.android.maps" android:required="true"/>
<activity
android:name=".Main"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我試圖通過仿真器控件添加假的經度和緯度，但它並沒有顯示出任何東西。