Java 在Webview上启用地理定位_Java_Android_Webview

Java 在Webview上启用地理定位

java android webview

Java 在Webview上启用地理定位,java,android,webview,Java,Android,Webview,晚上好。我正在使用Webview在Android上制作跟踪应用程序。我遇到了问题，因为系统在位置旁边运行良好在清单中，我已获得此权限设置 <uses-permission android:name="android.permission.INTERNET"></uses-permission> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses

晚上好。我正在使用Webview在Android上制作跟踪应用程序。我遇到了问题，因为系统在位置旁边运行良好

在清单中，我已获得此权限设置

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

我不知道是什么让它不起作用，可能是因为它总是出现在请求许可或其他什么的地方。我需要很大的帮助。谢谢我搜索了一些关于启用权限的模板，但出现了很多错误

首先，Android清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.webview"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="5" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".GeoWebViewActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

package com.example.webview;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.GeolocationPermissions;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

/**
 * A minimal WebView app with HTML5 geolocation capability
 *
 * @author David M. Chandler
 */
public class GeoWebViewActivity extends Activity {

    /**
     * WebViewClient subclass loads all hyperlinks in the existing WebView
     */
    public class GeoWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            // When user clicks a hyperlink, load in the existing WebView
            view.loadUrl(url);
            return true;
        }
    }

    /**
     * WebChromeClient subclass handles UI-related calls
     * Note: think chrome as in decoration, not the Chrome browser
     */
    public class GeoWebChromeClient 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
                mGeolocationOrigin = origin;
                mGeolocationCallback = 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 (mGeolocationCallback != null) {
                    // call back to web chrome client
                    mGeolocationCallback.invoke(mGeolocationOrigin, allow, false);
                }
                break;
        }
    }

    WebView mWebView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mWebView = (WebView) findViewById(R.id.webView1);
        // Brower niceties -- pinch / zoom, follow links in place
        mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
        mWebView.getSettings().setBuiltInZoomControls(true);
        mWebView.setWebViewClient(new GeoWebViewClient());
        // Below required for geolocation
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.getSettings().setGeolocationEnabled(true);
        mWebView.setWebChromeClient(new GeoWebChromeClient());
        // Load google.com
        mWebView.loadUrl("http://www.google.com");
    }

    @Override
    public void onBackPressed() {
        // Pop the browser back stack or exit the activity
        if (mWebView.canGoBack()) {
            mWebView.goBack();
        }
        else {
            super.onBackPressed();
        }
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/webView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />

最后，这里是完整的应用程序，只包含GeoWebViewActivity:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.webview"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="5" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".GeoWebViewActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

package com.example.webview;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.GeolocationPermissions;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

/**
 * A minimal WebView app with HTML5 geolocation capability
 *
 * @author David M. Chandler
 */
public class GeoWebViewActivity extends Activity {

    /**
     * WebViewClient subclass loads all hyperlinks in the existing WebView
     */
    public class GeoWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            // When user clicks a hyperlink, load in the existing WebView
            view.loadUrl(url);
            return true;
        }
    }

    /**
     * WebChromeClient subclass handles UI-related calls
     * Note: think chrome as in decoration, not the Chrome browser
     */
    public class GeoWebChromeClient 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
                mGeolocationOrigin = origin;
                mGeolocationCallback = 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 (mGeolocationCallback != null) {
                    // call back to web chrome client
                    mGeolocationCallback.invoke(mGeolocationOrigin, allow, false);
                }
                break;
        }
    }

    WebView mWebView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mWebView = (WebView) findViewById(R.id.webView1);
        // Brower niceties -- pinch / zoom, follow links in place
        mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
        mWebView.getSettings().setBuiltInZoomControls(true);
        mWebView.setWebViewClient(new GeoWebViewClient());
        // Below required for geolocation
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.getSettings().setGeolocationEnabled(true);
        mWebView.setWebChromeClient(new GeoWebChromeClient());
        // Load google.com
        mWebView.loadUrl("http://www.google.com");
    }

    @Override
    public void onBackPressed() {
        // Pop the browser back stack or exit the activity
        if (mWebView.canGoBack()) {
            mWebView.goBack();
        }
        else {
            super.onBackPressed();
        }
    }
}

package com.example.webview；
导入android.app.Activity；
导入android.os.Bundle；
导入android.webkit.GeolocationPermissions；
导入android.webkit.WebChromeClient；
导入android.webkit.WebView；
导入android.webkit.WebViewClient；
/**
*具有HTML5地理定位功能的最小WebView应用程序
*
*@作者大卫·M·钱德勒
*/
公共类GeoWebViewActivity扩展了活动{
/**
*WebViewClient子类加载现有WebView中的所有超链接
*/
公共类GeoWebViewClient扩展了WebViewClient{
@凌驾
公共布尔值shouldOverrideUrlLoading（WebView视图，字符串url）{
//当用户单击超链接时，加载现有WebView
view.loadUrl（url）；
返回true；
}
}
/**
*WebChromeClient子类处理与UI相关的调用
*注意：将chrome视为装饰，而不是chrome浏览器
*/
公共类GeoWebChromeClient扩展WebChromeClient{
@凌驾
public void onGeolocationPermissionsShowPrompt（字符串原点，
GeolocationPermissions.Callback（回调）{
//来自此应用程序清单的地理位置权限仅对具有
//API_版本<23。在API 23及更高版本上，我们必须检查权限，并且可能
//问他们。
字符串perm=Manifest.permission.ACCESS\u FINE\u位置；
if（Build.VERSION.SDK_INT


希望这有帮助
    private boolean isLocationPermissionGrandted() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            return ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
                    || ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED
                    || ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_BACKGROUND_LOCATION) == PackageManager.PERMISSION_GRANTED;
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            return ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
                    || ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED;
        } else {
            return true;
        }
    }


    private void getLocationPermission() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_BACKGROUND_LOCATION}, PERMISSION_LOCATTION_CODE);
        } else {
            ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_LOCATTION_CODE);
        }
    }

我得到了一些错误。错误：（14）错误：未找到resource drawable/ic_launcher（又名com.example.slate.web:drawable/ic_launcher）。错误：（14）未找到resource drawable/ic_launcher（又名com.example.slate.web:drawable/ic_launcher）。你知道发生了什么吗？是的。请用以下命令更新此消息：获得另一个错误。错误：（15，8）错误：类GeoWebViewActivity是公共的，应在名为GeoWebViewActivity.java的文件中声明，错误：（49，25）错误：包R不存在。是否也有办法解决此问题？用包名替换清单中的包。包=“com.example.webview”更改这一行。同样在清单文件和活动文件中使用您的包名。完成。仍然是eror，但通过将mainactivity.java重命名为GeoWebViewActivity.java解决了此问题。是否有问题？一个错误剩余错误：（49，32）错误：找不到符号变量main。无论如何，非常感谢先生的帮助，我非常感谢