Google map not show any thing in map

问题

i am showing a map in activity ... but when i run app on device it does not show any thing , it show just white screen and zoom in zoom out options... MAP key is right .. thanks ..

AndroidManifest.xml

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />



     <permission android:name="com.edxample.finalmap.permission.MAPS_RECEIVE"
         android:protectionLevel="signature" />
     <uses-permission android:name="com.edxample.finalmap.permission.MAPS_RECEIVE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <uses-feature android:glEsVersion="0x00020000"
        android:required="true" />




    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.edxample.finalmap.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="AIzaSyBL8ANi3jKkM0tF65C_Qus2_JgWRzClhfU" />

    </application>

</manifest>

activity_main.xml

<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"
    tools:context=".MainActivity" >

     <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:map="http://schemas.andoid.com/apk/es-auto"
        android:name="com.google.android.gms.maps.SupportMapFragment" />


</RelativeLayout>

MainActivity

package com.edxample.finalmap;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends FragmentActivity  {

    private GoogleMap googleMap;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if(check()) 
        {
            setContentView(R.layout.activity_main);
            Toast.makeText(this, "In Google play service.", Toast.LENGTH_LONG).show();
            initFun();
        }
        else
        {
            Toast.makeText(this, "Google play service not available.", Toast.LENGTH_LONG).show();
        }
    }


    private Boolean check()
    {
        int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
        if(status==ConnectionResult.SUCCESS)
        {
            return true;
        }

        return false;
    }

    public void initFun()
    {
        SupportMapFragment sp = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        googleMap = sp.getMap();
        googleMap.setMyLocationEnabled(true);
        googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);


    }


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

}

回答1:

Is your map API key for your debugbuilds or your release builds? The key is based on your keystore, which is different between your debug and release build. Your release key for google maps won't work if you're debugging your app, and vice versa.

回答2:

Use your main packet name for generate key.
For example: im my project, google map v2 is in com.ftravelbook.googlemapv2 but when generate key, you must use your main packet name (com.ftravelbook) here are some screenshots: