java - 无法实现OnMapReadyCallback

Question

我正在开发一个带有抽屉导航的项目，其中一个 fragment 应该与 Google map 相关。

我正在尝试实现 OnMapReadyCallback 接口(interface)，但它无法解析该符号。

我已尝试更新 Google Play 服务。这是我的 build.gradle :app

   apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.zakrzewskibartlomiej.cv_v3"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    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-v7:23.4.0'
    compile 'de.hdodenhof:circleimageview:2.0.0'
    compile 'com.android.support:design:23.4.0'
    compile 'com.android.support:recyclerview-v7:23.4.0'
    compile 'com.google.android.gms:play-services:9.0.1'
    compile 'com.google.android.gms:play-services-maps:8.4.0'


}

在这里我正在尝试实现这个

import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener, onMapReadyCallback {

    NavigationView navigationView = null;
    Toolbar toolbar = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        //set the fragment initially
        MainFragment fragment = new MainFragment();
        android.support.v4.app.FragmentTransaction fragmentTransaction =
                getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container, fragment);
        fragmentTransaction.commit();

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }

我该如何解决这个问题？

Answer 1

拼写错误...您已导入此内容。

import com.google.android.gms.maps.OnMapReadyCallback;

所以需要大写

onMapReadyCallback

此外，如果您要使用多个播放服务，请确保您拥有相同版本的播放服务(尽管您似乎只需要 map )

compile 'com.google.android.gms:play-services-maps:9.0.1'