android webview定位权限请求

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公司项目混合应用，h5界面用了百度定位，在手机系统浏览器上会弹出定位权限请求框，但在app的webview上就没响应，查看资料，发现还需要实现WebChromeClient类的onGeolocationPermissionsShowPrompt方法，步骤如下：

1、定位权限申明

    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <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" />

2、WebView相关设置

    mWebView.getSettings().setGeolocationEnabled(true);

    private WebChromeClient mWebChromeClient = new WebChromeClient() {
        @Override
        public void onGeolocationPermissionsShowPrompt(final String origin, final GeolocationPermissions.Callback callback) {
            callback.invoke(origin, true, true);
        }
    };


    mWebView.setWebChromeClient(mWebChromeClient);

这样完了之后有可能onGeolocationPermissionsShowPrompt不会被调用到，看这段源码说明：

/**
 * Notify the host application that web content from the specified origin
 * is attempting to use the Geolocation API, but no permission state is
 * currently set for that origin. The host application should invoke the
 * specified callback with the desired permission state. See
 * {@link GeolocationPermissions} for details.
 *
 * <p>Note that for applications targeting Android N and later SDKs
 * (API level > {@link android.os.Build.VERSION_CODES#M})
 * this method is only called for requests originating from secure
 * origins such as https. On non-secure origins geolocation requests
 * are automatically denied.</p>
 *
 * @param origin The origin of the web content attempting to use the
 *               Geolocation API.
 * @param callback The callback to use to set the permission state for the
 *                 origin.
 */
public void onGeolocationPermissionsShowPrompt(String origin,
        GeolocationPermissions.Callback callback) {}

意思是，如果targetSdkVersion设置为21以上，同时如果h5不是https开头，该方法会自动拒绝执行。解决办法是把targetSdkVersion设置为21就可以了。