[英]Android Studio: geolocation not working. Failing to get geolocation in Webview
我正在使用WebView顯示不同的html頁面。 在這些示例中,我正在通過mapbox實現地圖,但找不到用戶位置。 即使我在WebView中打開不同的https頁面,也不會在這些位置找到該位置。 我允許位置權限,並向Android Manifest添加了不同的用戶權限。
這些頁面可以很好地定位設備的位置,如果我不通過我正在運行的應用程序中的WebView打開它們的話。
我創建的頁面包含一張與leaflet.com的api配合使用的地圖。
這是一些嘗試使之正常工作的簡單代碼。
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private TextView mTextMessage;
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
mTextMessage.setText(R.string.title_home);
return true;
case R.id.navigation_dashboard:
mTextMessage.setText(R.string.title_dashboard);
return true;
case R.id.navigation_notifications:
mTextMessage.setText(R.string.title_notifications);
return true;
}
return false;
}
};
private WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView myWebView = (WebView) findViewById(R.id.map);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webSettings.setGeolocationEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setBuiltInZoomControls(true);
webSettings.setGeolocationEnabled(true);
//myWebView.loadUrl("file:///android_asset/leaflet.html");
myWebView.loadUrl("https://mylocation.org");
mTextMessage = (TextView) findViewById(R.id.message);
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}
}
這是manifest.xml的代碼,在該代碼中我提供了不同的用戶權限
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.hsos.spotit">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
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>
</application>
</manifest>
我希望有人可以幫我解決這個問題,因為我花了數小時來解決這個問題。 互聯網上幾乎沒有任何問題與此或任何解決方案接近。
問候
您需要設置一個WebChromeClient方法來請求適當的權限:
private String geolocationOrigin;
private GeolocationPermissions.Callback geolocationCallback;
WebSettings webSettings = webView.getSettings();
//required for Geolocation
webSettings.setGeolocationEnabled(true);
webView.setWebChromeClient(new MyGeoWebChromeClient());
public class MyGeoWebChromeClient extends WebChromeClient {
@Override
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
// Geolocation permissions coming from this app's Manifest will only be valid for devices with
// API_VERSION < 23. On API 23 and above, we must check for permissions, and possibly
// ask for them.
String perm = Manifest.permission.ACCESS_FINE_LOCATION;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M ||
ContextCompat.checkSelfPermission(MainActivity.this, perm) == PackageManager.PERMISSION_GRANTED) {
// we're on SDK < 23 OR user has already granted permission
callback.invoke(origin, true, false);
} else {
if (!ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, perm)) {
// ask the user for permission
ActivityCompat.requestPermissions(MainActivity.this, new String[]{perm}, REQUEST_FINE_LOCATION);
// we will use these when user responds
geolocationOrigin = origin;
geolocationCallback = callback;
}
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case REQUEST_FINE_LOCATION:
boolean allow = false;
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// user has allowed this permission
allow = true;
}
if (geolocationCallback != null) {
// call back to web chrome client
geolocationCallback.invoke(geolocationOrigin, allow, false);
}
break;
}
}
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