将Google Maps添加到Android App

Question

Me and my group members have been trying to add Google Maps in one of our activities but all attempts failed. We'd like to ask for some help.

We followed the steps here .

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.exapp.maptrial01"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="17"
    android:targetSdkVersion="22" />

<permission
    android:name = "com.exapp.maptrial01.permission.MAPS_RECEIVE"
    android:protectionLevel = "signature" />

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

<uses-permission android:name = "com.exapp.maptrial01.permission.MAPS_RECEIVE" />
<uses-permission android:name = "android.permission.INTERNET" />
<uses-permission android:name = "android.permission.WRITE_EXTERNAL_STORAGE" />
<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" >
    <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>

    <meta-data
        android:name = "com.google.android.maps.v2.API_KEY"
        android:value = "intentionally left blank" />

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
</application>

</manifest>

MainActivity.java

package com.exapp.maptrial01;

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

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 MainActivity extends FragmentActivity implements OnMapReadyCallback {

static final LatLng MarqueeMall = new LatLng(15.163350, 120.609495);
private GoogleMap gMap;

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

    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}   

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.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();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

@Override
public void onMapReady(GoogleMap arg0) {
    // TODO Auto-generated method stub
    gMap = arg0;

    // Add a marker in Sydney, Australia, and move the camera.
    LatLng sydney = new LatLng(15.163350, 120.609495);
    gMap.addMarker(new MarkerOptions().position(sydney).title("Marker in MQ"));
    gMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
  }
}

activity_main.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=".MainActivity"
android:name="com.google.android.gms.maps.SupportMapFragment" />

Answer 1

I believe you have to have the android key which is described in step 4. and replace

    android:name="com.google.android.maps.v2.API_KEY"
    android:value="intentionally left blank" />

with

    android:name="com.google.android.maps.v2.API_KEY"
    android:value="xxxxxxxxxxxxxxxxx" />