使用Google Map API的演示Android应用崩溃

时间：2019-02-09 12:02:35

标签： java android google-maps google-api google-maps-api-2

我已经学习了一段时间的android应用程序开发，并且遇到了这个烦人的bug，在我的设备上运行它时，我的应用程序崩溃了（Mi a1，android 9，API 28）。我没有在原始代码中做任何更改，只是在适当的地方输入了我的api。

AndroidManifest.xml 

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

    <!--
         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:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <!--
             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" />

        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

google_maps_api.xml 

<resources>
<!--
TODO: Before you run your application, you need a Google Maps API key.

To get one, follow this link, follow the directions and press "Create" at the end:

https://console.developers.google.com/flows/enableapi?apiid=maps_android_backend&keyType=CLIENT_SIDE_ANDROID&r=D0:2E:31:27:4F:07:82:C0:F9:CD:5F:14:70:FF:28:CB:29:85:5A:CE%3Bcom.example.googlemapdemo

You can also add your credentials to an existing key, using these values:

Package name:
D0:2E:31:27:4F:07:82:C0:F9:CD:5F:14:70:FF:28:CB:29:85:5A:CE

SHA-1 certificate fingerprint:
D0:2E:31:27:4F:07:82:C0:F9:CD:5F:14:70:FF:28:CB:29:85:5A:CE

Alternatively, follow the directions here:
https://developers.google.com/maps/documentation/android/start#get-key

Once you have your key (it starts with "AIza"), replace the "google_maps_key"
string in this file.
-->
<string name="google_maps_key" templateMergeStrategy="preserve" translatable="false">AIzaSyDHi-e0aEeDxZbspTt5m5ydO0Kv5gxdd_8</string>

MapsActivity.java 

package com.example.googlemapdemo;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;

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.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap mMap;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }


    /**
     * 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));
    }
}

错误消息：

 E/AndroidRuntime: FATAL EXCEPTION: Thread-6
    Process: com.example.googlemapdemo, PID: 26667
    java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/ProtocolVersion;
        at fb.b(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):3)
        at fa.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):3)
        at fc.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):15)
        at com.google.maps.api.android.lib6.drd.al.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):6)
        at ee.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):23)
        at ee.run(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):8)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.ProtocolVersion" on path: DexPathList[[zip file "/data/user_de/0/com.google.android.gms/app_chimera/m/000000bc/MapsDynamite.apk"],nativeLibraryDirectories=[/data/user_de/0/com.google.android.gms/app_chimera/m/000000bc/MapsDynamite.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at ad.loadClass(:com.google.android.gms.dynamite_dynamiteloader@15090083@15.0.90 (100408-231259764):4)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at fb.b(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):3) 
        at fa.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):3) 
        at fc.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):15) 
        at com.google.maps.api.android.lib6.drd.al.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):6) 
        at ee.a(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):23) 
        at ee.run(:com.google.android.gms.dynamite_mapsdynamite@15090083@15.0.90 (100408-231259764):8) 

请帮助。

2 个答案:

答案 0 :(得分：0)

您忘记添加软件包名称了吗？

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
          package="com.example.googlemapdemo">

    <application
        android:allowBackup="false"

.....

答案 1 :(得分：0)

LogCat出现错误

  

classnotfoundexception：未找到类   “ org.apache.http.ProtocolVersion”

搜索该错误会显示许多类似这样的结果，请尝试一下，这可能会解决该错误，将其添加到您的Androidmanifest.xml 

public class DifferentSummands {
    private static List<Integer> optimalSummands(int n) {
        List<Integer> summands = new ArrayList<Integer>();
        int start = 1;
        int newNumber = n;

        if (n == 2) {
            summands.add(2);
            return summands;
        }

        while (true) {
            if (summands.contains(newNumber - start)) {
                start++;
                continue;
            } else {
                newNumber -= start;
                summands.add(start);
                start++;
            }

            if (newNumber == 0) {
                return summands;
            }
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        List<Integer> summands = optimalSummands(n);
        System.out.println(summands.size());

        for (Integer summand : summands) {
            System.out.print(summand + " ");
        }
    }
}
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