Question

我使用谷歌地图v2并显示多个标记但首先我要在屏幕上显示地图我在这里放下了我的所有文件只给出空白我会检查出来，但对我来说没有任何作用

enter image description here

main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

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

</RelativeLayout>

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mapactivity"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />  
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />        
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <permission
        android:name="com.example.stiptis.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
    <uses-permission android:name="com.example.stiptis.permission.MAPS_RECEIVE"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.stiptis.MainActivity"
            android:label="@string/app_name" >

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

        </activity>
          <meta-data
                    android:name="com.google.android.maps.v2.API_KEY"
                    android:value="your api key" />
    </application>

</manifest>

活动类

public class MainActivity extends FragmentActivity {

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

    }



}

Answer 1

您的Maps API密钥可能存在问题。将此函数放入您的活动中，并查看它记录的正确SHA密钥：

 private void getShaKey() {

 try {
 PackageInfo info = getPackageManager().getPackageInfo("your.package.name",
 PackageManager.GET_SIGNATURES);
 for (Signature signature : info.signatures) {
 MessageDigest md = MessageDigest.getInstance("SHA");
 md.update(signature.toByteArray());
 Log.v(TAG, "KeyHash:" + Base64.encodeToString(md.digest(),
 Base64.DEFAULT));
 }
 } catch (NameNotFoundException e) {
 e.printStackTrace();

 } catch (NoSuchAlgorithmException e) {
 e.printStackTrace();

 }

 }

Answer 2

如果您尝试使用sdk extras中的地图示例，您可能会发现this answer有帮助。

Answer 3

安卓密钥代

还有可能出现名称包问题

Answer 4

这将打印出您需要在Google Developers Console中输入的签名和包名称，以生成API密钥：

private void getShaKey() {
    try {
      Activity activity = this; // or getActivity() if the code is in fragment
      String packageName = activity.getPackageName();
      PackageInfo info = activity.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
      for (android.content.pm.Signature signature : info.signatures) {
        MessageDigest md = MessageDigest.getInstance("SHA1");
        md.update(signature.toByteArray());
        byte[] digest = md.digest();
        Log.v(LOG_TAG, "KeyHash: " + bytesToHex(digest) + ";" + packageName);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public static String bytesToHex(byte[] bytes) {
    char[] hexArray = "0123456789ABCDEF".toCharArray();
    char[] hexChars = new char[bytes.length * 2];
    for (int j = 0; j < bytes.length; j++) {
      int v = bytes[j] & 0xFF;
      hexChars[j * 2] = hexArray[v >>> 4];
      hexChars[j * 2 + 1] = hexArray[v & 0x0F];
    }
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < hexChars.length; i += 2) {
      sb.append(hexChars[i]);
      sb.append(hexChars[i + 1]);
      if (i < hexChars.length - 2) {
        sb.append(':');
      }
    }
    return sb.toString();
  }

在日志中查找KeyHash：

这是对Analizer代码的修改。

Android Google Map V2显示空白并仅显示缩放按钮？

4 个答案: