Android Studio SDK V23 WebView获取地理位置

Question

yet another question regarding this issue. Sorry to be redundant, but I've looked everwhere and still I can't get this to work. My webpage navigator.geolocation function returns this error: The application does not have sufficient geolocation permissions. It doesn't ever ask the user if they'll allow permission. Everything works in different browsers on my desktop (chrome, ff, safari, ie 10 +).

I'm running an emulator in android studio... the phone type is a nexus 5 api 23 (android 6.0).

Here's the hodgpodge of code I have for this by now:

//my mainActivity.java file:

  @Override
   protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mWebView = (WebView) findViewById(R.id.activity_main_webview);
    WebSettings mWebSettings = mWebView.getSettings();
    mWebSettings.setJavaScriptEnabled(true);
    String userAgent = mWebView.getSettings().getUserAgentString() ;
    mWebSettings.setUserAgentString(userAgent);

    mWebSettings.setBuiltInZoomControls(true);
    mWebSettings.setAppCacheEnabled(true);
    mWebSettings.setDatabaseEnabled(true);
    mWebSettings.setDomStorageEnabled(true);
    mWebSettings.setAllowFileAccess(true);
    mWebSettings.setAllowContentAccess(true);
    mWebSettings.setGeolocationEnabled(true);
    mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);

    mWebView.clearCache(true);
    mWebView.clearHistory();
    mWebView.clearView();
    mWebView.loadUrl("https://mywebsite.com");


    mWebView.setWebChromeClient(new WebChromeClient()
    {
        @Override
        public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
            callback.invoke(origin, true, false);
        }

etc...

//my android manifest file:

<?xml version="1.0" encoding="utf-8"?>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
<uses-permission android:name="android.permission.MANAGE_DOCUMENTS"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

I'm stuck stuck stuck. Starting to wonder if this is even possible... how to people get this to work?!?!?!?

Answer 1

Assuming you use AppCompatActivity, not plain activity, this does the trick:

@Override
   protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
//your code
        ActivityCompat.requestPermissions(getActivity(), new String[]{
                android.Manifest.permission.ACCESS_COARSE_LOCATION,
                android.Manifest.permission.ACCESS_FINE_LOCATION
        }, 0);
//your code
}

Starting from Android 6, API level 23, permission handling has changed. You should ask permission for critical functionalities (like location) from user explicitly in runtime.