Android：谷歌地圖沒有顯示

我按照教程做了所有事情，地圖顯示在教程中，但即使我做了完全相同的事情，它也不會顯示在我的教程中。Android：谷歌地圖沒有顯示

MainActivity.Java

package com.example.ankit.mrestro; 

import android.app.Dialog; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.FragmentActivity; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 

import com.google.android.gms.appindexing.Action; 
import com.google.android.gms.appindexing.AppIndex; 
import com.google.android.gms.common.ConnectionResult; 
import com.google.android.gms.common.GooglePlayServicesUtil; 
import com.google.android.gms.common.api.GoogleApiClient; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.MapView; 

public class MainActivity extends AppCompatActivity implements View.OnClickListener { 
    private static final int GPS_ERRORDIALOGUE_REQUEST = 9001; 
    GoogleMap mMap; 
    MapView mMapView; 
    Button bLogout; 
    EditText etFName, etLName, etAge, etEmail, etUserName; 
    UserLocalStorage userLocalStorage; 
    /** 
    * ATTENTION: This was auto-generated to implement the App Indexing API. 
    * See https://g.co/AppIndexing/AndroidStudio for more information. 
    */ 
    private GoogleApiClient client; 


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

     if (servicesOK()){ 
      Toast.makeText(this, "Ready to map", Toast.LENGTH_SHORT).show(); 
      setContentView(R.layout.activity_mapview); 

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


     } 
     setContentView(R.layout.activity_main); 

     etFName = (EditText) findViewById(R.id.etFName); 
     etLName = (EditText) findViewById(R.id.etLName); 
     etAge = (EditText) findViewById(R.id.etAge); 
     etEmail = (EditText) findViewById(R.id.etEmail); 
     etUserName = (EditText) findViewById(R.id.etUserName); 

     bLogout = (Button) findViewById(R.id.bLogout); 
     bLogout.setOnClickListener(this); 
     userLocalStorage = new UserLocalStorage(this); 


     // ATTENTION: This was auto-generated to implement the App Indexing API. 
     // See https://g.co/AppIndexing/AndroidStudio for more information. 
     client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build(); 
    } 

    @Override 
    protected void onStart() { 
     super.onStart(); 
     // ATTENTION: This was auto-generated to implement the App Indexing API. 
     // See https://g.co/AppIndexing/AndroidStudio for more information. 
     client.connect(); 
     if (authenticate() == true) { 
      DisplaysUserDetails(); 
     } 

     // ATTENTION: This was auto-generated to implement the App Indexing API. 
     // See https://g.co/AppIndexing/AndroidStudio for more information. 
     Action viewAction = Action.newAction(
       Action.TYPE_VIEW, // TODO: choose an action type. 
       "Main Page", // TODO: Define a title for the content shown. 
       // TODO: If you have web page content that matches this app activity's content, 
       // make sure this auto-generated web page URL is correct. 
       // Otherwise, set the URL to null. 
       Uri.parse("http://host/path"), 
       // TODO: Make sure this auto-generated app deep link URI is correct. 
       Uri.parse("android-app://com.example.ankit.mrestro/http/host/path") 
     ); 
     AppIndex.AppIndexApi.start(client, viewAction); 
    } 

    private boolean authenticate() { 
     return userLocalStorage.getUserLoggedIn(); 

    } 

    private void DisplaysUserDetails() { 
     User user = userLocalStorage.GetLoggedInUser(); 
     etUserName.setText(user.UserName); 
     etFName.setText(user.FirstName); 
     etLName.setText(user.LastName); 
     etAge.setText(user.Age + ""); 
    } 

    @Override 
    public void onClick(View v) { 
     switch (v.getId()) { 
      case R.id.bLogout: 
       userLocalStorage.ClearUserData(); 
       userLocalStorage.SetUserLoggedIn(false); 
       startActivity(new Intent(this, Login.class)); 
       break; 
     } 
    } 

    public boolean servicesOK() { 
     int isAvailable = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); 
     if (isAvailable == ConnectionResult.SUCCESS) { 
      return true; 
     } else if (GooglePlayServicesUtil.isUserRecoverableError(isAvailable)) { 
      Dialog dialog = GooglePlayServicesUtil.getErrorDialog(isAvailable, this, GPS_ERRORDIALOGUE_REQUEST); 
      dialog.show(); 
     } 
     else { 
      Toast.makeText(this, "Can't connect to google play services", Toast.LENGTH_SHORT).show(); 

     } 
     return false; 


    } 

    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 
     mMapView.onDestroy(); 

    } 

    @Override 
    public void onLowMemory() { 
     super.onLowMemory(); 
     mMapView.onLowMemory(); 
    } 

    @Override 
    protected void onPause() { 
     super.onPause(); 
     mMapView.onPause(); 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     mMapView.onResume(); 
    } 

    @Override 
    protected void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     mMapView.onSaveInstanceState(outState); 

    } 



    @Override 
    public void onStop() { 
     super.onStop(); 

     // ATTENTION: This was auto-generated to implement the App Indexing API. 
     // See https://g.co/AppIndexing/AndroidStudio for more information. 
     Action viewAction2 = Action.newAction(
       Action.TYPE_VIEW, // TODO: choose an action type. 
       "Main Page", // TODO: Define a title for the content shown. 
       // TODO: If you have web page content that matches this app activity's content, 
       // make sure this auto-generated web page URL is correct. 
       // Otherwise, set the URL to null. 
       Uri.parse("http://host/path"), 
       // TODO: Make sure this auto-generated app deep link URI is correct. 
       Uri.parse("android-app://com.example.ankit.mrestro/http/host/path") 
     ); 
     AppIndex.AppIndexApi.end(client, viewAction2); 
     client.disconnect(); 
    } 
}

AndroidManifest

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    package="com.example.ankit.mrestro"> 

    <uses-sdk 
     android:minSdkVersion="15" 
     android:targetSdkVersion="23"/> 

     <permission android:name="com.example.ankit.mrestro.permission.MAPS_RECEIVE" 
      android:protectionLevel="signature"/> 

     <uses-permission android:name="android.permission.INTERNET"/> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
    <uses-permission android:name="com.google.android.providers.gsg.permission.READ_GSERVICES"/> 

    <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="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme" 
     tools:replace="android:icon, android:theme, android:label"> 

     <meta-data 
      android:name="com.google.android.maps.v2.API_KEY" 
      android:value="<<APIKEY>>"/> 




     <activity 
      android:name=".Login" 
      android:label="@string/title_activity_login" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

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

      <activity 
      android:name=".MainActivity" 
      android:label="@string/app_name" 
      android:theme="@style/AppTheme.NoActionBar" /> 
     <activity 
      android:name=".Register" 
      android:label="@string/title_activity_register" 
      android:theme="@style/AppTheme.NoActionBar" /> 
     <activity 
      android:name=".Main2Activity" 
      android:label="@string/title_activity_main2" 
      android:theme="@style/AppTheme.NoActionBar"></activity> 
     <!-- ATTENTION: This was auto-generated to add Google Play services to your project for 
      App Indexing. See https://g.co/AppIndexing/AndroidStudio for more information. --> 
     <meta-data 
      android:name="com.google.android.gms.version" 
      android:value="@integer/google_play_services_version" /> 
    </application> 

</manifest>

activity_mapview

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

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

</LinearLayout>

我我注意到我沒有創建一個單獨的按鈕來顯示地圖。這可能是問題嗎？如果是這樣，我該如何爲Google地圖分配一個按鈕？我知道如何創建按鈕併爲其分配活動，但我如何爲Google Maps做這件事？請幫忙。

來源

2016-07-30 Bik

[Android：Google地圖不顯示]的可能重複（http://stackoverflow.com/questions/16551458/android-google-maps-not-displaying） –

你在哪裏得到你的地圖？你應該在你的活動實施OnMapReadyCallback，然後在的onCreate做到以下幾點：

 if (/* play services are OK */) { 
     mMapView.onCreate(savedInstanceState); 
     mMapView.getMapAsync(this); 
    }

，然後覆蓋的onMapReady調用（類似的東西）：

@Override 
public void onMapReady(GoogleMap googleMap) { 
    mGoogleMap = googleMap; 
    UiSettings uiSettings = mGoogleMap.getUiSettings(); 
    uiSettings.setZoomControlsEnabled(true); 

    if (mCameraPosition != null) { 
     mGoogleMap.moveCamera(CameraUpdateFactory.newCameraPosition(mCameraPosition)); 
    } 
    addMarkers(); 
}

您可以檢查出我的代碼： https://github.com/dmytroKarataiev/EarthquakeSurvival/blob/master/app/src/main/java/com/adkdevelopment/earthquakesurvival/MapviewFragment.java

也非常重要：永遠不要向任何人顯示您的API密鑰。這違反了Google的規定，對您也不安全。

來源

2016-07-30 04:58:44

Android：谷歌地圖沒有顯示

回答

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