Nur physisches Gerät - Google Maps - 'Datei.mkdir()' für eine Nullobjekt-Referenz

Ich führe meinen Code und erhalte diesen Fehler, wenn ich die App auf dem mobilen Gerät verwende, aber auf dem Emulator funktioniert es.Nur physisches Gerät - Google Maps - 'Datei.mkdir()' für eine Nullobjekt-Referenz

E/AndroidRuntime: FATAL EXCEPTION: main 
       Process: com.example.nirbhaym.Indoor, PID: 17543 
       java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.nirbhaym.Indoor/com.example.nirbhaym.indoor.MapsActivity}: android.view.InflateException: Binary XML file line #62: Error inflating class fragment 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2335) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2397) 
        at android.app.ActivityThread.access$800(ActivityThread.java:151) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1310) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:135) 
        at android.app.ActivityThread.main(ActivityThread.java:5268) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at java.lang.reflect.Method.invoke(Method.java:372) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:697) 
       Caused by: android.view.InflateException: Binary XML file line #62: Error inflating class fragment 
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763) 
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
        at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
        at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
        at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
        at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256) 
        at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109) 
        at com.example.nirbhaym.indoor.MapsActivity.onCreate(MapsActivity.java:50) 
        at android.app.Activity.performCreate(Activity.java:6033) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2288) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2397)  
        at android.app.ActivityThread.access$800(ActivityThread.java:151)  
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1310)  
        at android.os.Handler.dispatchMessage(Handler.java:102)  
        at android.os.Looper.loop(Looper.java:135)  
        at android.app.ActivityThread.main(ActivityThread.java:5268)  
        at java.lang.reflect.Method.invoke(Native Method)  
        at java.lang.reflect.Method.invoke(Method.java:372)  
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)  
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:697)  
       Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.io.File.mkdir()' on a null object reference 
        at com.google.maps.api.android.lib6.gmm6.m.ad.a(Unknown Source) 
        at com.google.maps.api.android.lib6.gmm6.c.h.a(Unknown Source) 
        at com.google.maps.api.android.lib6.gmm6.c.y.a(Unknown Source) 
        at com.google.maps.api.android.lib6.e.bd.a(Unknown Source) 
        at com.google.maps.api.android.lib6.e.ev.a(Unknown Source) 
        at com.google.maps.api.android.lib6.e.z.a(Unknown Source) 
        at com.google.maps.api.android.lib6.e.y.a(Unknown Source) 
        at com.google.android.gms.maps.internal.u.onTransact(SourceFile:107) 
        at android.os.Binder.transact(Binder.java:380) 
        at com.google.android.gms.maps.internal.IMapFragmentDelegate$zza$zza.onCreateView(Unknown Source) 
        at com.google.android.gms.maps.SupportMapFragment$zza.onCreateView(Unknown Source) 
        at com.google.android.gms.dynamic.zza$4.zzb(Unknown Source) 
        at com.google.android.gms.dynamic.zza.zza(Unknown Source) 
        at com.google.android.gms.dynamic.zza.onCreateView(Unknown Source) 
        at com.google.android.gms.maps.SupportMapFragment.onCreateView(Unknown Source) 
        at android.support.v4.app.Fragment.performCreateView(Fragment.java:1962) 
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1036) 
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1226) 
        at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1328) 
        at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2284) 
        at android.support.v4.app.FragmentController.onCreateView(FragmentController.java:111) 
        at android.support.v4.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:314) 
        at android.support.v4.app.BaseFragmentActivityHoneycomb.onCreateView(BaseFragmentActivityHoneycomb.java:31) 
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:79) 
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733) 
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)  
        at android.view.LayoutInflater.inflate(LayoutInflater.java:504)  
        at android.view.LayoutInflater.inflate(LayoutInflater.java:414)  
        at android.view.LayoutInflater.inflate(LayoutInflater.java:365)  
        at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256)  
        at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)  
        at com.example.nirbhaym.indoor.MapsActivity.onCreate(MapsActivity.java:50)  
        at android.app.Activity.performCreate(Activity.java:6033)  
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)  
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2288)  
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2397)  
        at android.app.ActivityThread.access$800(ActivityThread.java:151)  
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1310)  
        at android.os.Handler.dispatchMessage(Handler.java:102)  
        at android.os.Looper.loop(Looper.java:135)  
        at android.app.ActivityThread.main(ActivityThread.java:5268)  
        at java.lang.reflect.Method.invoke(Native Method)  
        at java.lang.reflect.Method.invoke(Method.java:372)  
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)  
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:697)

I/Prozess: Senden des Signals. PID: 17543 SIG: 9 Anwendung beendet.

Hauptaktivitätscode

package com.example.nirbhaym.indoor; 
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.BitmapDescriptor; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.GroundOverlay; 
import com.google.android.gms.maps.model.GroundOverlayOptions; 
import com.google.android.gms.maps.model.LatLng; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.CheckBox; 
import android.widget.SeekBar; 
import android.widget.SeekBar.OnSeekBarChangeListener; 

import java.util.ArrayList; 
import java.util.List;

/** * Dies zeigt, wie ein Boden-Overlay auf einer Karte hinzuzufügen. */ public class MapsActivity erstreckt AppCompatActivity implementiert OnSeekBarChangeListener, OnMapReadyCallback, GoogleMap.OnGroundOverlayClickListener {

private static final int TRANSPARENCY_MAX = 100; 

private static final LatLng NEWARK = new LatLng(28.544594, 77.272486); 

private static final LatLng NEAR_NEWARK = 
     new LatLng(NEWARK.latitude - 0.001, NEWARK.longitude - 0.025); 

private final List<BitmapDescriptor> mImages = new ArrayList<BitmapDescriptor>(); 

private GroundOverlay mGroundOverlay; 

private GroundOverlay mGroundOverlayRotated; 

private SeekBar mTransparencyBar; 

private int mCurrentEntry = 0; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.layout); 

    mTransparencyBar = (SeekBar) findViewById(R.id.transparencySeekBar); 
    mTransparencyBar.setMax(TRANSPARENCY_MAX); 
    mTransparencyBar.setProgress(0); 

    SupportMapFragment mapFragment = 
      (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); 
    mapFragment.getMapAsync(this); 
} 

@Override 
public void onMapReady(GoogleMap map) { 
    // Register a listener to respond to clicks on GroundOverlays. 
    map.setOnGroundOverlayClickListener(this); 

    map.moveCamera(CameraUpdateFactory.newLatLngZoom(NEWARK, 11)); 

    mImages.clear(); 
    mImages.add(BitmapDescriptorFactory.fromResource(R.drawable.fourth_floor_app)); 
    //mImages.add(BitmapDescriptorFactory.fromResource(R.drawable.newark_prudential_sunny)); 

    // Add a small, rotated overlay that is clickable by default 
    // (set by the initial state of the checkbox.) 
    mGroundOverlayRotated = map.addGroundOverlay(new GroundOverlayOptions() 
      .image(mImages.get(0)).anchor(0, 1) 
      .position(NEAR_NEWARK, 4300f, 3025f) 
      .bearing(30) 
      .clickable(((CheckBox) findViewById(R.id.toggleClickability)).isChecked())); 

    // Add a large overlay at Newark on top of the smaller overlay. 
    mGroundOverlay = map.addGroundOverlay(new GroundOverlayOptions() 
      .image(mImages.get(mCurrentEntry)).anchor(0, 1) 
      .position(NEWARK, 8600f, 6500f)); 

    mTransparencyBar.setOnSeekBarChangeListener(this); 

    // Override the default content description on the view, for accessibility mode. 
    // Ideally this string would be localised. 
    map.setContentDescription("Google Map with ground overlay."); 
} 

@Override 
public void onStopTrackingTouch(SeekBar seekBar) { 
} 

@Override 
public void onStartTrackingTouch(SeekBar seekBar) { 
} 

@Override 
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
    if (mGroundOverlay != null) { 
     mGroundOverlay.setTransparency((float) progress/(float) TRANSPARENCY_MAX); 
    } 
} 

public void switchImage(View view) { 
    mCurrentEntry = (mCurrentEntry + 1) % mImages.size(); 
    mGroundOverlay.setImage(mImages.get(mCurrentEntry)); 
} 

/** 
* Toggles the visibility between 100% and 50% when a {@link GroundOverlay} is clicked. 
*/ 
@Override 
public void onGroundOverlayClick(GroundOverlay groundOverlay) { 
    // Toggle transparency value between 0.0f and 0.5f. Initial default value is 0.0f. 
    mGroundOverlayRotated.setTransparency(0.5f - mGroundOverlayRotated.getTransparency()); 
} 

/** 
* Toggles the clickability of the smaller, rotated overlay based on the state of the View that 
* triggered this call. 
* This callback is defined on the CheckBox in the layout for this Activity. 
*/ 
public void toggleClickability(View view) { 
    if (mGroundOverlayRotated != null) { 
     mGroundOverlayRotated.setClickable(((CheckBox) view).isChecked()); 
    } 
}

}

Layout-Datei

<?xml version="1.0" encoding="utf-8"?><!-- 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical"> 

<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:background="@drawable/fourth_floor_app" 
    android:padding="5dp"> 

    <TextView 
     android:id="@+id/transparency_text" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center_vertical" 
     android:text="string/transparency" /> 

    <SeekBar 
     android:id="@+id/transparencySeekBar" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_toEndOf="@+id/transparency_text" 
     android:layout_toRightOf="@+id/transparency_text" /> 

    <Button 
     android:id="@+id/switchImage" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/transparencySeekBar" 
     android:onClick="switchImage" 
     android:text="string/switch_image" /> 

    <CheckBox 
     android:id="@+id/toggleClickability" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBottom="@+id/switchImage" 
     android:layout_toEndOf="@+id/switchImage" 
     android:layout_toRightOf="@+id/switchImage" 
     android:checked="true" 
     android:onClick="toggleClickability" 
     android:text="string/clickable" /> 

</RelativeLayout> 

<fragment 
    android:id="@+id/map" 
    class="com.google.android.gms.maps.SupportMapFragment" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" /> 

</LinearLayout>

Quelle

2017-03-02 NIrbhay Mathur

Ich denke, das Problem in der XML-Datei ist. Bitte posten Sie Ihren Layout-Code –

Überprüfen Sie meine Antwort und siehe Tutorial für Details :) –

@Nirbhay Haben Sie Google API-Taste in Manifest hinzugefügt? –

FragmentManager fmanager = getSupportFragmentManager(); 
     Fragment fragment = fmanager.findFragmentById(R.id.map); 
     SupportMapFragment supportmapfragment = (SupportMapFragment)fragment; 
     GoogleMap supportMap = supportmapfragment.getMap();

diesen Code versuchen. Dafür ist das Tutorial here hoffe das hilft dir. Das Problem besteht nur in Fragmenten. Sie müssen die Berechtigungen auch im obigen Tutorial überprüfen. Hoffe, dass es Sie

http://www.truiton.com/2013/05/android-supportmapfragment-example/

EDIT hilft:

prüfen die Berechtigung für externe Speicher:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Quelle

2017-03-02 05:49:18

Tutorial-Link funktioniert nicht. sonst wo ich deinen erwähnten Code platzieren kann. –

Link funktioniert gut, bitte überprüfen Sie. Ich bearbeite meine Antwort mit Link URL –

das ist zu alt tutorial .. getMap wird nicht mit seiner neuesten Play-Service-Abhängigkeit arbeiten. –

Nur physisches Gerät - Google Maps - 'Datei.mkdir()' für eine Nullobjekt-Referenz

Antwort

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