Android MapBox 膨胀错误。没有找到类 MapView

Question

当我使用 MapBox 库启动 android 应用程序时出现异常:

"android.view.InflateException: Binary XML file line #9: Error inflating class com.mapbox.mapboxsdk.views.MapView"

“原因”字段包含此文本:

java.lang.ClassNotFoundException: Didn't find class "com.mapbox.mapboxsdk.views.MapView" on path: DexPathList[[zip file "/data/app/com.example.my.mymapbox-2/base.apk"],nativeLibraryDirectories=[/data/app/com.example.my.mymapbox-2/lib/arm, /vendor/lib, /system/lib]]

请帮忙

这是我的代码:

build.gradle

apply plugin: 'com.android.application'

android {
compileSdkVersion 23
buildToolsVersion "23.0.2"

defaultConfig {
    applicationId "com.example.my.mymapbox"
    minSdkVersion 19
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile ('com.mapbox.mapboxsdk:mapbox-android-sdk:4.0.0-beta.2@aar'){
    transitive=true
}
}

主 Activity .java

package com.example.my.mymapbox;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

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

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<com.mapbox.mapboxsdk.views.MapView
    android:id="@+id/mapview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    mapbox:access_token="@string/accessToken"/>
<!-- note the access token string created in the previous step -->
</RelativeLayout>

Answer 1

MapView 的 XML 需要是 com.mapbox.mapboxsdk.maps.MapView 而不是 com.mapbox.mapboxsdk.views.MapView

在使用最新的 Mapbox Android SDK 版本时可能有帮助的其他事情是:

    implementation ('com.mapbox.mapboxsdk:mapbox-android-sdk:8.4.0@aar'){
        transitive=true
    }

确保包括所有必需的权限以及遥测服务:

    <service android:name="com.mapbox.mapboxsdk.telemetry.TelemetryService" />

为了在 8.4.0 中控制 MapView，有一个名为 getMapAsync 的新方法，它会在 map 准备就绪时进行监听。完成后，您可以添加标记、更改相机位置等。

这是请求权限的方法:

Mapbox.getInstance(this, ACCESS_TOKEN);

您的 onCreate 方法应如下所示:

    String ACCESS_TOKEN = "ACCESS_TOKEN_HERE"

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

        // Be sure to call this setContentView
        Mapbox.getInstance(this, ACCESS_TOKEN);

        setContentView(R.layout.activity_main);

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

        mapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(MapboxMap mapboxMap) {

                // add markers, change camera position, etc. here!

            }

    ... 

最后，确保在 Activity 生命周期中包含所有 mapView 方法。它看起来像这样:

    // Activity lifecycle methods
    @Override
    protected void onStart() {
        super.onStart();
        mapView.onStart();
    }

    @Override
    public void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    public void onPause() {
        super.onPause();
        mapView.onPause();
    }

    @Override
    protected void onStop() {
        super.onStop();
        mapView.onStop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mapView.onDestroy();
    }

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

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