こんにちは、私は自分のアプリに以下を実装しようとしています。Googleマップであなたの場所を表示し、次のチュートリアルがあるページですが、アプリのこのセクションを実行するたびにクラッシュします助けていただければ幸いです
私のデバイスで実行すると常にクラッシュします私は非常に多くのことを試しましたが、残念ながらAndroidの初心者です地図上のどこにいるかを示すだけの場所セクションと座標は私にはまったく機能していないようです.
丸太猫はこちら。
丸太の猫
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>