我的 android 应用程序使用 MapView，但在使用 MapView 开始活动后，我连续遇到三个错误：
找不到提供商信息 com.google.settings
然后
无法获取连接工厂客户端
我已经设置了所有权限和 Api 密钥。但显示网格图。
我在过去两周内解决了这个问题，但我没有解决..
有人知道如何解决这个问题？？
这是我的代码
public class AndroidGPSApplicationActivity extends MapActivity {
private MapView map=null;
private MyLocationOverlay me=null;
private ToggleButton toggle_button;
private TextView latitude=null;
public double value;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
map=(MapView)findViewById(R.id.mapview);
map.getController().setCenter(getPoint(34.0043,71.5448));
map.getController().setZoom(13);
map.setBuiltInZoomControls(true);
map.setTraffic(true);
Drawable marker=getResources().getDrawable(R.drawable.marker);
marker.setBounds(0, 0, marker.getIntrinsicWidth(), marker.getIntrinsicHeight());
map.getOverlays().add(new SitesOverlay(marker));
me=new MyLocationOverlay(this, map);
map.getOverlays().add(me);
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = map.getOverlays();
listOfOverlays.add(mapOverlay);
tabView();
latitude = (TextView)findViewById(R.id.latitude_value);
//latitude.setText(null);
toggle_button = (ToggleButton)findViewById(R.id.togglebutton);
toggle_button.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(toggle_button.isChecked())
{
enableGps();
Toast.makeText(getApplicationContext(), "The state of GPS is changed to on", Toast.LENGTH_LONG).show();
}
else
{
disableGps();
Toast.makeText(getApplicationContext(), "The state of GPS is changed to off", Toast.LENGTH_LONG).show();
}
}
});
} // end of onCreate(); function
@Override
public void onResume() {
super.onResume();
me.enableCompass();
}
@Override
public void onPause() {
super.onPause();
me.disableCompass();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_S) {
map.setSatellite(!map.isSatellite());
return(true);
}
else if (keyCode == KeyEvent.KEYCODE_Z) {
map.displayZoomControls(true);
return(true);
}
return(super.onKeyDown(keyCode, event));
}
private void tabView() { //setting two tabs ..for Map and Update
TabHost tabs = (TabHost)findViewById(R.id.TabHost01);
tabs.setup();
TabHost.TabSpec spec1 = tabs.newTabSpec("tag1");
spec1.setContent(R.id.setting);
spec1.setIndicator("Setting");
tabs.addTab(spec1);
//TabHost tabs = (TabHost)findViewById(R.id.TabHost01);
//tabs.setup();
TabHost.TabSpec spec2 = tabs.newTabSpec("tag2");
spec2.setContent(R.id.layout1);
spec2.setIndicator("Map");
tabs.addTab(spec2);
TabHost.TabSpec spec3 = tabs.newTabSpec("tag3");
spec3.setContent(R.id.layout2);
spec3.setIndicator("Stastistics");
tabs.addTab(spec3);
}
protected void disableGps() {
Intent intent=new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", false);
sendBroadcast(intent);
}
protected void enableGps()
{
Intent intent=new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", true);
sendBroadcast(intent);
}
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
private GeoPoint getPoint(double lat, double lon) {
return(new GeoPoint((int)(lat*1000000.0), (int)(lon*1000000.0)));
}
/*
* This is an inner class .
* for puting an image on specified location..
*/
private class SitesOverlay extends ItemizedOverlay<OverlayItem> {
private List<OverlayItem> items=new ArrayList<OverlayItem>();
private Drawable marker=null;
public SitesOverlay(Drawable marker) {
super(marker);
this.marker=marker;
items.add(new OverlayItem(getPoint(34.0043, 71.5448),"PK", "PTCL Office Cantt"));
items.add(new OverlayItem(getPoint(34.004124555, 71.4859698), "Lincoln Center", "Department of Computer Science"));
items.add(new OverlayItem(getPoint(34.03484758, 71.54653569), "Carnegie Hall", "Where you go with practice, practice, practice"));
items.add(new OverlayItem(getPoint(34.07492254, 71.5464754), "The Downtown Club", "Original home of the Heisman Trophy"));
populate();
}
@Override
protected OverlayItem createItem(int i) {
return(items.get(i));
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
boundCenterBottom(marker);
}
@Override
protected boolean onTap(int i) {
Toast.makeText(AndroidGPSApplicationActivity.this, items.get(i).getSnippet(),
Toast.LENGTH_SHORT).show();
return(true);
}
@Override
public int size() {
return(items.size());
}
}
private class MapOverlay extends Overlay
{
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
//---when user lifts his finger---
if (event.getAction() == 1) {
GeoPoint p = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Toast.makeText(getBaseContext(),
"Location: "+
p.getLatitudeE6() / 1E6 + "," +
p.getLongitudeE6() /1E6 ,
Toast.LENGTH_SHORT).show();
value= p.getLatitudeE6() / 1E6 ;
String str_value = Double.toString(value);
latitude.setText(str_value);
}
return false;
}
}
}
xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TabHost
android:id="@+id/TabHost01"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="90dp"
>
<TextView
android:id="@+id/setting"
android:text="@string/setting_tab"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<RelativeLayout
android:id="@+id/layout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<com.google.android.maps.MapView
android:id="@+id/mapview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:apiKey="Api Key"
android:clickable="true"
/>
<ToggleButton
android:id="@+id/togglebutton"
android:layout_width="50dp"
android:layout_height="50dp"
android:textOn="ON"
android:textOff="OFF"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
<LinearLayout
android:id="@+id/layout2"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/latitude_lbl"
android:text="@string/latitude"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/latitude_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/longitude_lbl"
android:text="@string/longitude"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</FrameLayout>
</TabHost>
</LinearLayout>
清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="android.gps.welcome"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="4" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<uses-library android:name="com.google.android.maps"/>
<activity
android:name=".AndroidGPSApplicationActivity"
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>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"></uses-permission>
</manifest>