英文:
When I say add place from the menu in Android Studio, it sometimes opens the map and sometimes the application closes without opening it
问题
以下是翻译好的内容:
当我在Android Studio中从菜单中选择“添加地点”时,有时会打开地图,有时应用程序会在未打开地图的情况下关闭。当我说“添加地点”时,应用程序在未打开地图的情况下关闭,我会收到FATAL EXCEPTION: main错误。
Logcat错误:
2020-10-04 09:50:34.691 12343-12343/com.nuresrasoylu.myfavoriteplaces E/AndroidRuntime: 在writeCrashedAppName中,pkgName:com.nuresrasoylu.myfavoriteplaces
2020-10-04 09:50:34.693 12343-12343/com.nuresrasoylu.myfavoriteplaces E/AndroidRuntime: 致命异常:main
进程:com.nuresrasoylu.myfavoriteplaces,PID:12343
java.lang.AbstractMethodError: 抽象方法“void android.location.LocationListener.onStatusChanged(java.lang.String, int, android.os.Bundle)”
在android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:304)
在android.location.LocationManager$ListenerTransport.-wrap0(LocationManager.java)
在android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:242)
在android.os.Handler.dispatchMessage(Handler.java:102)
在android.os.Looper.loop(Looper.java:154)
在android.app.ActivityThread.main(ActivityThread.java:6138)
在java.lang.reflect.Method.invoke(Native Method)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:893)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
ManActivity.java
package com.nuresrasoylu.myfavoriteplaces;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.add_place,menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
if (item.getItemId() == R.id.add_place) {
Intent intent = new Intent(MainActivity.this,MapsActivity.class);
intent.putExtra("info","new");
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
MapsActivity.java
package com.nuresrasoylu.myfavoriteplaces;
import androidx.annotation.NonNull;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.FragmentActivity;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
LocationManager locationManager;
LocationListener locationListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(@NonNull Location location) {
LatLng userLocation = new LatLng(location.getLatitude(),location.getLongitude());
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(userLocation,15));
}
};
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,new String[] {Manifest.permission.ACCESS_FINE_LOCATION},1);
} else {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
Location lastLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (lastLocation != null) {
LatLng lastUserLocation = new LatLng(lastLocation.getLatitude(),lastLocation.getLongitude());
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(lastUserLocation,15));
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (grantResults.length > 0 ) {
if (requestCode == 1) {
if (ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED ) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
}
}
}
}
}
add_place.xml
```
英文:
When I say add place from the menu in Android Studio, it sometimes opens the map and sometimes the application closes without opening it. When I say add place, when the application is closed without opening the map, I get the FATAL EXCEPTION: main error.
Logcat Error:
22020-10-04 09:50:34.691 12343-12343/com.nuresrasoylu.myfavoriteplaces E/AndroidRuntime: in writeCrashedAppName, pkgName :com.nuresrasoylu.myfavoriteplaces
2020-10-04 09:50:34.693 12343-12343/com.nuresrasoylu.myfavoriteplaces E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.nuresrasoylu.myfavoriteplaces, PID: 12343
java.lang.AbstractMethodError: abstract method "void android.location.LocationListener.onStatusChanged(java.lang.String, int, android.os.Bundle)"
at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:304)
at android.location.LocationManager$ListenerTransport.-wrap0(LocationManager.java)
at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:242)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6138)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:893)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
ManActivity.java
package com.nuresrasoylu.myfavoriteplaces;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.add_place,menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
if (item.getItemId() == R.id.add_place) {
Intent intent = new Intent(MainActivity.this,MapsActivity.class);
intent.putExtra("info","new");
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
MapsActivity.java
package com.nuresrasoylu.myfavoriteplaces;
import androidx.annotation.NonNull;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.FragmentActivity;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
LocationManager locationManager;
LocationListener locationListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(@NonNull Location location) {
LatLng userLocation = new LatLng(location.getLatitude(),location.getLongitude());
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(userLocation,15));
}
};
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,new String[] {Manifest.permission.ACCESS_FINE_LOCATION},1);
} else {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
Location lastLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (lastLocation != null) {
LatLng lastUserLocation = new LatLng(lastLocation.getLatitude(),lastLocation.getLongitude());
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(lastUserLocation,15));
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (grantResults.length > 0 ) {
if (requestCode == 1) {
if (ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED ) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
}
}
}
}
}
add_place.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/add_place" android:title="Add Place"></item>
</menu>
答案1
得分: 2
包括以下代码:
public void onLocationChanged(@NonNull Location location){} :
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
英文:
Include the below code:
public void onLocationChanged(@NonNull Location location){} :
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
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