【发布时间】：2017-06-05 09:05:15
【问题描述】：
在我的 android 应用程序中，我想要一个 MainActivity 和一个占据整个屏幕的谷歌地图。
我的问题是google map不显示地图，只有左下角的google logo：
以下是主要活动的相关部分，其中应显示地图：
public class MainActivity extends AppCompatActivity implements OnMapReadyCallback,
NavigationView.OnNavigationItemSelectedListener {
private GoogleMap mMap;
private FragmentManager mFragmentManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
setupLayout();
mFragmentManager = getSupportFragmentManager();
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
这是包含谷歌地图片段的主要活动内容的xml：
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.purringcat.stray.view.activity.MainActivity"/>
这是清单文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.purringcat.stray">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:name=".Stray"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".view.activity.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>
<activity
android:name=".view.activity.LoginActivity"
android:label="@string/title_activity_login"
android:theme="@style/AppTheme.NoActionBar">
</activity>
<activity android:name=".view.activity.SignUpActivity">
</activity>
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key"/>
</application>
</manifest>
【问题讨论】：
-
这通常是由不正确的地图集成（错误的令牌/密钥/证书）引起的
-
会不会和我没有使用FragmentActivity有关？
-
1) 确保您已在项目中添加 API 密钥。 2) 确保您的 api 在 Google 控制台上启用。 3) 确保您提供的 SHA-1 是正确的。
-
FragmentActivity我不认为这是相关的。我确定您使用了错误的 API 密钥，或者为地图生成了错误的指纹。 -
似乎没有问题与 api_key 或与地图集成有关。我对正在发生的事情感到非常困惑，因为我似乎没有错误或错误。
标签： android android-fragments google-maps-android-api-2