if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
  != PackageManager.PERMISSION_GRANTED
  || ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
  != PackageManager.PERMISSION_GRANTED
  || ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
  != PackageManager.PERMISSION_GRANTED) {
  Toast.makeText(getApplicationContext(),"没有权限,请手动开启定位权限",Toast.LENGTH_SHORT).show();
  // 申请一个（或多个）权限，并提供用于回调返回的获取码（用户定义）
  ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 100);
  return false;
 }

WebView webView = (WebView)findViewById(R.id.webview); 
WebSettings webSettings = webView.getSettings(); 
 
//webview支持js脚本 
webSettings.setJavaScriptEnabled(true); 
 
//启用数据库 
webSettings.setDatabaseEnabled(true); 
 
//设置定位的数据库路径 
String dir = this.getApplicationContext().getDir("database", Context.MODE_PRIVATE).getPath(); 
webSettings.setGeolocationDatabasePath(dir); 
 
//启用地理定位 
webSettings.setGeolocationEnabled(true); 
 
//开启DomStorage缓存 
webSettings.setDomStorageEnabled（true） 
 
//配置权限 
webView.setWebChromeClient(new WebChromeClient() { 
 @Override 
 public void onReceivedIcon(WebView view, Bitmap icon) { 
 super.onReceivedIcon(view, icon); 
 
} 
 
@Override 
public void onGeolocationPermissionsShowPrompt(String origin,Callback callback) { 
 callback.invoke(origin, true, false); 
 super.onGeolocationPermissionsShowPrompt(origin, callback); 
 
} 
}); 

 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 <uses-permission android:name="android.permission.READ_PHONE_STATE" />
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
 <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />