import java.util.Locale;import android.app.Activity;import android.content.ComponentName;import android.content.Intent;import android.content.pm.ActivityInfo;import android.net.Uri;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.webkit.WebView;import android.webkit.WebViewClient;public class MainActivity extends Activity {private static final String MAP_URL = "http://ditu.google.cn/maps?hl=zh&mrt=loc&q=31.1198723,121.1099877&q=(上海青浦大街100号)";private static final String MAP_URL1 = "https://www.google.com/maps/dir/@41.4943358,-73.1530549,8z/data=http://www.mamicode.com/!4m13!4m12!1m5!1m1!1s0x89c24fa5d33f083b:0xc80b8f06e177fe62!2m2!1d-74.0059413!2d40.7127837!1m5!1m1!1s0x89e3652d0d3d311b:0x787cbf240162e8a0!2m2!1d-71.060097!2d42.3584865";  private int gMapZoom = 8;private WebView gWebView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// webView = (WebView) findViewById(R.id.webView1);//// webView.getSettings().setJavaScriptEnabled(true);//设置使用够执行JS脚本// webView.getSettings().setBuiltInZoomControls(true);//设置使支持缩放// webView.loadUrl("http://ditu.google.cn/maps?hl=zh&mrt=loc&q=-74,40.7167");        setupWebView();        this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);}  private void setupWebView(){          final String centerURL = "javascript:initialize();"                               + "centerAt(" + -74 + "," + 40.7167 + ");"                               + "map.setZoom(" + gMapZoom + ");";               gWebView = (WebView)findViewById(R.id.webview);               // JavaScript 啟用        gWebView.getSettings().setJavaScriptEnabled(true);               // 網頁執行完成後, 接著要執行的網頁 (也可是 JavaScript)        gWebView.setWebViewClient(new WebViewClient(){            public void onPageFinished(WebView view, String url){                view.loadUrl(centerURL);            }        });               gWebView.loadUrl(MAP_URL);    }@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.main, menu);return true;}public void gotoMap(View view){double  sourceLatitude = -74;double  sourceLongitude = 40.7167;double  destinationLatitude = 38.53;double  destinationLongitude = 70.02;String directionweburl = "http://maps.google.com/maps?daddr="+sourceLatitude+","+sourceLongitude+"&saddr="+destinationLatitude+","+destinationLongitude;Intent myIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(directionweburl));startActivity(myIntent);// String uri = String.format(Locale.ENGLISH, "http://maps.google.com/maps?saddr=%f,%f(%s)&daddr=%f,%f (%s)", sourceLatitude, sourceLongitude, "Home Sweet Home", destinationLatitude, destinationLongitude, "Where the party is at");// Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));// intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity");// startActivity(intent);}} 

 mian.xml

<?xml version="1.0"  encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/main"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:layout_gravity="center"    android:orientation="vertical" >    <Button        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:onClick="gotoMap"        android:text="@string/app_name" >    </Button>    <WebView        android:id="@+id/webview"        android:layout_width="fill_parent"        android:layout_height="fill_parent" /></LinearLayout>

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