Question

我正在尝试使用Google地图创建一个WebView应用程序，但是当我运行它时，它只显示一张空白地图。

这是我的MainActivity.java

public class MainActivity extends ActionBarActivity {
public WebView mWB;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN);
        setContentView(R.layout.activity_main);
        mWB = (WebView) findViewById(R.id.mWB);
        mWB.setWebViewClient(new MCWC());
        WebSettings webSET = mWB.getSettings();
        webSET.setJavaScriptEnabled(true);
        mWB.loadUrl("http://www.tomshardware.com/");
        Button btnEins = (Button) findViewById(R.id.bntmap);
        btnEins.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View v) {
                Intent intencion = new Intent(v.getContext(),maps.class );
                startActivity(intencion);
            }

        });
    }
    public class MCWC extends WebViewClient {
        public boolean ShouldOverrideLoading(String url,WebView view){
            view.loadUrl(url);
            return true;
        }
    }
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            switch (keyCode) {
                case KeyEvent.KEYCODE_BACK:
                    if (mWB.canGoBack()) {
                        mWB.goBack();
                    } else {
                        finish();
                    }
                    return true;
            }

            /**@Override public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.menu_main, menu);
            return true;
            }

             @Override public boolean onOptionsItemSelected(MenuItem item) {
             // Handle action bar item clicks here. The action bar will
             // automatically handle clicks on the Home/Up button, so long
             // as you specify a parent activity in AndroidManifest.xml.
             int id = item.getItemId();

             //noinspection SimplifiableIfStatement
             if (id == R.id.action_settings) {
             return true;
             }

             return super.onOptionsItemSelected(item);
             }**/
        }
        return false;
    }
}

这是maps.java

public class maps extends Activity implements OnMapReadyCallback {
    UiSettings mapSettings;
    private final LatLng GEVGELIA = new LatLng(41.1421756,22.5026124);
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.maps);
        GoogleMap map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
        CameraUpdate update  = CameraUpdateFactory.newLatLngZoom(GEVGELIA,15);
        map.animateCamera(update);
        map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
        map.setMyLocationEnabled(true);
        map.setBuildingsEnabled(true);
        map.addMarker(new MarkerOptions()
                .position(new LatLng(41.139560, 22.503117))
                .title("Korzo"))
                .isVisible();
        map.addMarker(new MarkerOptions()
                .position(new LatLng(41.142284, 22.504579))
                .title("SOU Josif Josifofski"))
                .isVisible();

    }
    public void onMapReady(GoogleMap map) {
            mapSettings.setZoomControlsEnabled(true);
            mapSettings.setTiltGesturesEnabled(true);
            mapSettings.setRotateGesturesEnabled(true);
            mapSettings.setMyLocationButtonEnabled(true);

        map.addMarker(new MarkerOptions()
                .position(new LatLng(0, 0))
                .title("Marker"));
    }
}

Android Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.gvglive.gvglive" >
    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="21" />
    <permission
        android:name="com.gvglive.gvglive.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
    <uses-permission android:name="com.example.barcodelibrary.permission.MAPS_RECEIVE"/>
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <!-- The following two permissions are not required to use
                       Google Maps Android API v2, but are recommended. -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".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>
        <activity
            android:name=".maps"
            android:label="@string/app_name">
                <category android:name="android.intent.category.LAUNCHER" />
        </activity>
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyBEzDPkkL7c1VW9HS9KC8awuRsv9UpuA0M"/>
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
    </application>
</manifest>

maps.xml

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:name="com.google.android.gms.maps.MapFragment"/>

activity_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:paddingLeft="0dp"
    android:paddingRight="0dp"
    android:paddingTop="0dp"
    android:paddingBottom="0dp"
    tools:context=".MainActivity">
<WebView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/mWB">
    </WebView>

    <Button
        android:id="@+id/bntmap"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="55dp"
        android:layout_height="55dp"
        android:text="MAP"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:drawableTop="@drawable/top"
        android:background="@drawable/top"/>
</RelativeLayout>

将此添加到build.gradle

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile 'com.google.android.gms:play-services:6.5.87'
}

我已经检查了我的SHA1指纹和API密钥，我甚至尝试重新生成一个新的API密钥，我必须提一下，当我从android studio运行它到我的设备时它会显示地图，但是当我生成一个apk并安装它时，没有显示地图，我也尝试了app-release和app-debug。 / p>

http://i.stack.imgur.com/ushMB.png

Answer 1

您可以使用SDK导入中的Google Play服务库直接使用地图服务，并通过项目属性将其引用。或者，如果您使用的是Android Studio，只需使用默认的Maps项目创建项目即可。

请参阅以下工作代码...您可以按原样复制和粘贴文件：

AndroidManifest.xml

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

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <!--
 The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
         Google Maps Android API v2, but are recommended.
    -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <meta-data
            android:name="com.google.android.maps.v2.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>

MapsActivity.java

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import com.google.android.gms.maps.GoogleMap;
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 {

    private GoogleMap mMap; // Might be null if Google Play services APK is not available.

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

    @Override
    protected void onResume() {
        super.onResume();
        setUpMapIfNeeded();
    }


    private void setUpMapIfNeeded() {
        // Do a null check to confirm that we have not already instantiated the map.
        if (mMap == null) {
            // Try to obtain the map from the SupportMapFragment.
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();
            // Check if we were successful in obtaining the map.
            if (mMap != null) {
                setUpMap();
            }
        }
    }


    private void setUpMap() {
        mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
    }
}

activitmaps.xml

<fragment 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:id="@+id/map" tools:context=".MapsActivity"
    android:name="com.google.android.gms.maps.SupportMapFragment" />

请更改软件包名称并在Strings.xml或Manifest.xml中添加API V2密钥。

Google Maps API V2空白地图

1 个答案: