java - 开启 GPS 功能 webview
问题描述
我的网站有一个 webView 需要访问用户位置,它通过按下按钮并在表单中显示位置来实现。我需要一种来自 webView 的方法来要求用户打开 gps,如果它在单击按钮时关闭(它有id="locate button"
)。我怎样才能从 Android 工作室做到这一点?
我的代码:
MainActivity.java
public class MainActivity extends AppCompatActivity {
private WebView webview;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActivityCompat.requestPermissions(this, new String[]{
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION
}, 0);
webview = (WebView) findViewById(R.id.webView);
webview.setWebViewClient(new WebViewClient());
webview.getSettings().setAppCacheEnabled(true);
webview.getSettings().setDatabaseEnabled(true);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setDomStorageEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setGeolocationEnabled(true);
webview.setWebChromeClient(new WebChromeClient() {
@Override
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
callback.invoke(origin, true, false);
}
});
webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
webview.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url)
{
// hide element by class name
webview.loadUrl("javascript:(function() { " + "document.getElementsByClassName('menu-icone-container')[0].style.display='none'; })()");
}
});
webview.loadUrl("http://www.example.it");
}
编辑:我找到了一种方法来检查 gps 是否已关闭并提示用户进行 gps 设置,但我只能在应用程序启动时调用此方法,而不是当我按下按钮时
public void CheckEnableGPS() {
String provider = Settings.Secure.getString(getContentResolver(),
Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if (!provider.contains("gps")){
showSettingAlert();
}
}
public void showSettingAlert()
{
AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
alertDialog.setTitle("Impostazioni GPS");
alertDialog.setMessage("Per ottenere la posizione corrente il GPS deve essere attivo, attivarlo?");
alertDialog.setPositiveButton("Impostazioni", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
});
alertDialog.setNegativeButton("Annulla", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog.show();
}
解决方案
使用此代码向用户显示启用位置设置的提示,它不需要用户打开手机的设置窗口:
private void displayLocationSettingsRequest(Context context) {
GoogleApiClient googleApiClient = new GoogleApiClient.Builder(context)
.addApi(LocationServices.API).build();
googleApiClient.connect();
final String TAG = "YOUR-TAG-NAME";
final int REQUEST_CHECK_SETTINGS = 0x1;
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(10000);
locationRequest.setFastestInterval(10000 / 2);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest);
builder.setAlwaysShow(true);
PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
Log.i(TAG, "All location settings are satisfied.");
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
Log.i(TAG, "Location settings are not satisfied. Show the user a dialog to upgrade location settings ");
try {
// Show the dialog by calling startResolutionForResult(), and check the result
// in onActivityResult().
status.startResolutionForResult(MainActivity.this, REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException e) {
Log.i(TAG, "PendingIntent unable to execute request.");
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
Log.i(TAG, "Location settings are inadequate, and cannot be fixed here. Dialog not created.");
break;
}
}
});
}
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