Google地图不会加载到我的应用设备中 [英] Google map doesn't load into my app device

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本文介绍了Google地图不会加载到我的应用设备中的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我是android开发的新手。我正在使用互联网和后续教程自学。我正在制作一个应用程序，它有3个标签，一个用于位置第二个用于相机第三个是图片。为此，我在 android studio 中使用标签活动。在里面，我使用 mapView ，然后按照这个



我试图进入权限检查，但不能成功，因为我是一个新手，所以我正面临困难找到正确的解决方案（S）



更新1



更新我的代码后，看起来像 

  mMapView.getMapAsync（new OnMapReadyCallback（）{
 $ b @Override 
 public void onMapReady（GoogleMap googleMap）{
 if（Build.VERSION.SDK_INT> = Build.VERSION_CODES。 M）{
 
 if（ActivityCompat.checkSelfPermission（getActivity（），Manifest.permission.ACCESS_FINE_LOCATION）！= PackageManager.PERMISSION_GRANTED 
&& am磷; ActivityCompat.checkSelfPermission（getActivity（），Manifest.permission.ACCESS_COARSE_LOCATION）！= PackageManager.PERMISSION_GRANTED）
 {
 requestPermissions（new String [] {
 Manifest.permission.ACCESS_COARSE_LOCATION，
 Manifest.permission.ACCESS_FINE_LOCATION 
}，1）; 
} 
 else 
 {
 googleMap.setMyLocationEnabled（true）; 
 LatLng loc = new LatLng（31.492370,74.329060）; 
 googleMap.addMarker（new MarkerOptions（）。position（loc）.title（I am Here））; 
 //用于自动缩放到标记位置
 CameraPosition cameraPosition = new CameraPosition.Builder（）。target（loc）.zoom（12）.build（）; 
 googleMap.animateCamera（CameraUpdateFactory.newCameraPosition（cameraPosition））; 
} 
} 
 
} 
}）; 
 $ b $ @Override 
 public void onRequestPermissionsResult（int requestCode，String permissions []，int [] grantResults）{
 
 super.onRequestPermissionsResult（requestCode，permissions，grantResults） ; 
 switch（requestCode）{
案例1：{
 //如果请求被取消，结果数组为空。 
 if（grantResults.length> 0 
&&& amp; grantResults [0] == PackageManager.PERMISSION_GRANTED）{
 
} else {
 // permission denied ，嘘！禁用依赖此权限的
 //功能。 
 // finish（）; 
} 
 return; 
} 
 //其他'case'行检查其他
 //权限此应用可能请求
} 
} 
  API 16 上测试它，它给了我<$ c  
 
 
 
 
 
  $ c $ build>失败，错误为'错误：任务执行失败'：app：transformClassesWithDexForDebug' com.android.build.api.transform.TransformException：com.android.ide.common.process.ProcessException：java.util.concurrent.ExecutionException：com.android.dex.DexIndexOverflowException：方法ID不在[0,0xffff]中： 65536` 
 
 
任何帮助将不胜感激
解决方案
对于 Android版本> = M ，必须在运行系统询问权限，这不能自动完成。一般运行时权限询问代码。如果在 Fragment 而不是这个中，使用 getActivity（）。 
  @Override 
 public void onMapReady（GoogleMap googleMap）{
 
 
 if（Build.VERSION.SDK_INT> = Build.VERSION_CODES.M）{
 if（ActivityCompat.checkSelfPermission 
（this，Manifest.permission.ACCESS_FINE_LOCATION）！= PackageManager.PERMISSION_GRANTED 
& & 
 ActivityCompat.checkSelfPermission 
（this，Manifest.permission.ACCESS_COARSE_LOCATION）！= PackageManager.PERMISSION_GRANTED）
 {
 requestPermissions（new String [] {
 Manifest。 permission.ACCESS_COARSE_LOCATION，
 Manifest.permission.ACCESS_FINE_LOCATION 
}，1）; 
 // return; 
} 
 else {
 googleMap.setMyLocationEnabled（true）; 
 
 LatLng loc = new LatLng（31.492370,74.329060）; 
 
 googleMap.addMarker（new MarkerOptions（）。position（loc）.title（我在这里））; 
 
 //用于自动缩放标记的位置
 CameraPosition cameraPosition = new CameraPosition.Builder（）。target（loc）.zoom（12）.build（）; 
 googleMap.animateCamera（CameraUpdateFactory.newCameraPosition（cameraPosition））; 
 
 
 $ / code $ / pre 
 
 
处理权限：
 
 
  @Override 
 public void onRequestPermissionsResult（int requestCode，@NonNull String [] permissions，@NonNull int [] grantResults）{
 super。 onRequestPermissionsResult（requestCode，permissions，grantResults）; 
 
 case 1：
 if（grantResults [0]！= PackageManager.PERMISSION_GRANTED）{
 //权限未授予
} 
 else {
 //授予的权限
} 
 break; 
 //默认值：
 //super.onRequestPermissionsResult (requestCode，permissions，grantResults）; 
} 
 //} 
} 
  
 
I am newbie to android development. I am learning on my own using internet and following tutorials. I am making an app which have 3 tabs, one is for location second is for camera and third is for pictures. For this i am using a tabbed activity inside android studio. Inside it i am using mapView and followed this tutorial and done each step used in it. Moreover i have my apiKey for google map. 



Below are my codes 



Manifest
<uses-permission android:name="com.example.accurat.faisal.permission.MAPS_RECEIVE"/>
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true"
    />
 <application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="AIzaSyBhhxKOLbX2I3kNbsZy8lbSXtjuAijKL94"
        />

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

Location.java
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // inflat and return the layout
    View rootView = inflater.inflate(R.layout.my_location, container, false);

    mMapView = (MapView)rootView.findViewById(R.id.mapView);
    mMapView.onCreate(savedInstanceState);

    mMapView.onResume();

    try
    {
        MapsInitializer.initialize(getActivity().getApplicationContext());
    }catch (Exception e)
    {
        e.printStackTrace();
    }

    mMapView.getMapAsync(new OnMapReadyCallback() {
        @Override
        public void onMapReady(GoogleMap googleMap) {


            googleMap.setMyLocationEnabled(true);

            LatLng loc = new LatLng(31.492370,74.329060);

            googleMap.addMarker(new MarkerOptions().position(loc).title("I am here"));

            // For zooming automatically to the location of the marker
            CameraPosition cameraPosition = new CameraPosition.Builder().target(loc).zoom(12).build();
            googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));


        }
    });


    return rootView;

}

Location layout
<TextView
    android:id="@+id/section_label"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<com.google.android.gms.maps.MapView
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/mapView" />

Moreover at googleMap.setMyLocationEnabled(true); i am getting a red line which says 






I have tried to enter the permission check but couldn't succeed, as i am a newbie so i am facing difficulties finding the right solution(s)



Update 1



After updating my code look like 
 mMapView.getMapAsync(new OnMapReadyCallback() {

        @Override
        public void onMapReady(GoogleMap googleMap) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

                if(ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
                        && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
                {
                    requestPermissions(new String[]{
                            Manifest.permission.ACCESS_COARSE_LOCATION,
                            Manifest.permission.ACCESS_FINE_LOCATION
                    },1);
                }
                else
                {
                    googleMap.setMyLocationEnabled(true);
                    LatLng loc = new LatLng(31.492370,74.329060);
                    googleMap.addMarker(new MarkerOptions().position(loc).title("I am Here"));
                    // For zooming automatically to the location of the marker
                    CameraPosition cameraPosition = new CameraPosition.Builder().target(loc).zoom(12).build();
                    googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
                }
            }

        }
    });

 @Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {

    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode) {
        case 1: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            } else {
                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                //finish();
            }
            return;
        }
        // other 'case' lines to check for other
        // permissions this app might request
    }
}

I am testing it on my android device API 16 and it's giving me build failed with error `Error:Execution failed for task ':app:transformClassesWithDexForDebug'.

  
com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexIndexOverflowException: method ID not in [0, 0xffff]: 65536`


Any help would be appreciated
 解决方案 
For the Android Version >= M, the permission has to be asked at Runtime, which can not be done automatically. A general Runtime Permission asking code. Use getActivity() if inside Fragment instead of this.
    @Override
    public void onMapReady(GoogleMap googleMap) {


        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if(ActivityCompat.checkSelfPermission
                (this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
                &&
                ActivityCompat.checkSelfPermission
                        (this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            requestPermissions(new String[]{
                    Manifest.permission.ACCESS_COARSE_LOCATION,
                    Manifest.permission.ACCESS_FINE_LOCATION
            }, 1);
            //return;
        }
     else{
        googleMap.setMyLocationEnabled(true);

        LatLng loc = new LatLng(31.492370,74.329060);

        googleMap.addMarker(new MarkerOptions().position(loc).title("I am here"));

        // For zooming automatically to the location of the marker
        CameraPosition cameraPosition = new CameraPosition.Builder().target(loc).zoom(12).build();
        googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
      }
    }

Handle permission:
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

            case 1:
                if (grantResults[0] != PackageManager.PERMISSION_GRANTED){
                    // permission not granted
                }
                else {
                    // permission granted
                }
                break;
            //default:
                //super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    //}
}



                        
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