在我的设备上运行时它总是崩溃，我尝试了很多东西，但唉，我是 android The Place 部分的初学者，它只会显示你在地图上的位置，而且你的坐标似乎根本不适合我。
这是我的清单代码
按照建议编辑代码后仍然无法正常工作，这是日志猫
原木猫
04-02 03:45:19.025: W/dalvikvm(1102): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
04-02 03:45:19.104: E/AndroidRuntime(1102): FATAL EXCEPTION: main
04-02 03:45:19.104: E/AndroidRuntime(1102): java.lang.RuntimeException: Unable to start activityComponentInfo{com.hangoverhelper/com.hangoverhelper.Place}: java.lang.NullPointerException
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.os.Handler.dispatchMessage(Handler.java:99)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.os.Looper.loop(Looper.java:137)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.ActivityThread.main(ActivityThread.java:5041)
04-02 03:45:19.104: E/AndroidRuntime(1102): at java.lang.reflect.Method.invokeNative(Native Method)
04-02 03:45:19.104: E/AndroidRuntime(1102): at java.lang.reflect.Method.invoke(Method.java:511)
04-02 03:45:19.104: E/AndroidRuntime(1102): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-02 03:45:19.104: E/AndroidRuntime(1102): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-02 03:45:19.104: E/AndroidRuntime(1102): at dalvik.system.NativeStart.main(Native Method)
04-02 03:45:19.104: E/AndroidRuntime(1102): Caused by: java.lang.NullPointerException
04-02 03:45:19.104: E/AndroidRuntime(1102): at com.hangoverhelper.Place.onCreate(Place.java:42)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.Activity.performCreate(Activity.java:5104)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
04-02 03:45:19.104: E/AndroidRuntime(1102): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
04-02 03:45:19.104: E/AndroidRuntime(1102): ... 11 more
Place.java
package com.hangoverhelper;
import com.hangoverhelper.R;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.LocationSource;
import com.google.android.gms.maps.MapFragment;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
public class Place extends Activity
implements LocationSource, LocationListener{
final int RQS_GooglePlayServices = 1;
private GoogleMap myMap;
TextView tvLocInfo;
LocationManager myLocationManager = null;
OnLocationChangedListener myLocationListener = null;
Criteria myCriteria;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_place);
tvLocInfo = (TextView)findViewById(R.id.locinfo);
FragmentManager myFragmentManager = getFragmentManager();
MapFragment myMapFragment
= (MapFragment)myFragmentManager.findFragmentById(R.id.map);
myMap = myMapFragment.getMap();
myMap.setMyLocationEnabled(true);
myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
myCriteria = new Criteria();
myCriteria.setAccuracy(Criteria.ACCURACY_FINE);
myLocationManager = (LocationManager)getSystemService(LOCATION_SERVICE);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.place, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int itemId = item.getItemId();
if (itemId == R.id.menu_legalnotices) {
String LicenseInfo = GooglePlayServicesUtil.getOpenSourceSoftwareLicenseInfo(
getApplicationContext());
AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(Place.this);
LicenseDialog.setTitle("Legal Notices");
LicenseDialog.setMessage(LicenseInfo);
LicenseDialog.show();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onResume() {
super.onResume();
int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
if (resultCode == ConnectionResult.SUCCESS){
Toast.makeText(getApplicationContext(),
"isGooglePlayServicesAvailable SUCCESS",
Toast.LENGTH_LONG).show();
//Register for location updates using a Criteria, and a callback on the specified looper thread.
myLocationManager.requestLocationUpdates(
0L, //minTime
0.0f, //minDistance
myCriteria, //criteria
this, //listener
null); //looper
//Replaces the location source of the my-location layer.
myMap.setLocationSource(this);
}else{
GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices);
}
}
@Override
protected void onPause() {
myMap.setLocationSource(null);
myLocationManager.removeUpdates(this);
super.onPause();
}
@Override
public void activate(OnLocationChangedListener listener) {
myLocationListener = listener;
}
@Override
public void deactivate() {
myLocationListener = null;
}
@Override
public void onLocationChanged(Location location) {
if (myLocationListener != null) {
myLocationListener.onLocationChanged(location);
double lat = location.getLatitude();
double lon = location.getLongitude();
tvLocInfo.setText(
"lat: " + lat + "\n" +
"lon: " + lon);
}
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.hangoverhelper"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="17" />
<permission
android:name="com.hangoverhelper.permission.MAPS_RECEIVE"
android:protectionLevel="signature"></permission>
<uses-permission
android:name="com.hangoverhelper.permission.MAPS_RECEIVE"/>
<uses-permission
android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission
android:name="android.permission.INTERNET"/>
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission
android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission
android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:logo="@drawable/ic_launcher"
android:theme="@style/AppTheme" >
<activity
android:name="com.hangoverhelper.SplashActivity"
android:label="@string/title_activity_splash"
android:theme="@style/Theme.Splash" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.hangoverhelper.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
</activity>
<activity
android:name="com.hangoverhelper.Place"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="@string/local_title"
android:theme="@style/AppTheme" >
</activity>
<activity
android:name="com.hangoverhelper.Pill"
android:label="@string/pills_title" >
</activity>
<activity
android:name="com.hangoverhelper.Food"
android:label="@string/food_title" >
</activity>
<activity
android:name="com.hangoverhelper.Coffee"
android:label="@string/coffee_title" >
</activity>
<activity
android:name="com.hangoverhelper.Home"
android:label="@string/home_title" >
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyBkFR4cjuUf2rw8MfLBrWS8iaS2-Th5XA4"/>
</application>
</manifest>
*activity_place.xml*
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".Place" >
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment"
tools:layout="@layout/custom_info_contents" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#A0FFFFFF" >
<TextView
android:id="@+id/locinfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/local" />
</LinearLayout>
</RelativeLayout>