我正在使用webview创建一个Web应用程序。在应用程序中使用的网站页面之一上，有一个内置的Yandex映射。 在装有Android 4及更低版本的设备上，不会显示地图。我发现事件“ ymaps.ready”不起作用，在该事件中传递了“ init”函数，该函数创建了地图的实例。如果您使用超时调用“ init”函数，则会在该行中导致错误“ Uncaught TypeError：undefined is not a function”
myMap = new ymaps.Map
据我了解，尽管已加载Yandex库，但该应用程序看不到ymaps对象。我尝试从服务器加载Yandex库-相同的结果。公开了应用程序中所有必要的权限。 setJavaScriptEnabled = true。在android 6及更高版本中，显示地图。有什么事吗 谢谢！对不起，我的英语。
代码如下：
var myMap;
ymaps.ready(init);
setTimeout(init, 5000);
function init () {
alert('init');
// Creation of a map instance and its binding to a container with id 'map'
myMap = new ymaps.Map('map', {
center: [55.76, 37.64], // Москва
zoom: 10
}, {
searchControlProvider: 'yandex#search'
});
document.getElementById('destroyButton').onclick = function () {
myMap.destroy();
};
}
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Примеры. Размещение карты на странице.</title>
<script src="https://api-maps.yandex.ru/2.1/?lang=ru_RU" type="text/javascript"></script>
<script src="custom.js" type="text/javascript"></script>
<style>
body, html {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
}
#map {
width: 100%;
height: 90%;
}
</style>
</head>
<body>
<div id="map"></div>
<input type="button" id="destroyButton" value="Удалить карту"/>
</body>
</html>
package com.androidmkab.webview;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import android.view.View;
import android.webkit.ConsoleMessage;
import android.webkit.GeolocationPermissions;
import android.webkit.PermissionRequest;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.WebSettings.PluginState;
import android.widget.Toast;
public class MainActivity extends Activity {
private WebView webView;
private static final int FILECHOOSER_RESULTCODE = 2888;
private ValueCallback<Uri> mUploadMessage;
private Uri mCapturedImageURI = null;
private ValueCallback<Uri[]> mFilePathCallback;
private String mCameraPhotoPath;
private static final int INPUT_FILE_REQUEST_CODE = 1;
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File imageFile = File.createTempFile(
imageFileName,
".jpg",
storageDir
);
return imageFile;
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(Build.VERSION.SDK_INT >=23 && (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.MODIFY_AUDIO_SETTINGS) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.MODIFY_AUDIO_SETTINGS) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_NETWORK_STATE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_WIFI_STATE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.RECORD_AUDIO, Manifest.permission.MODIFY_AUDIO_SETTINGS, Manifest.permission.INTERNET, Manifest.permission.ACCESS_NETWORK_STATE, Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.ACCESS_FINE_LOCATION}, 1);
}
//Get webview
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
// Define url that will open in webview
String webViewUrl = "http://test3.kaz-press.kz/";
webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
webView.getSettings().setGeolocationEnabled(true);
// Other webview options
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
//Other webview settings
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(false);
webView.getSettings().setBuiltInZoomControls(false);
webView.getSettings().setPluginState(PluginState.ON);
webView.getSettings().setAllowFileAccess(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
webView.getSettings().setAllowFileAccessFromFileURLs(true);
webView.getSettings().setAllowUniversalAccessFromFileURLs(true);
}
webView.getSettings().setSupportZoom(false);
webView.getSettings().setGeolocationDatabasePath(getFilesDir().getPath());
//Load url in webview
webView.loadUrl(webViewUrl);
// Define Webview manage classes
startWebView();
}
private void startWebView() {
webView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.contains("google")){
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
return true;
} else {
view.loadUrl(url);
return true;
}
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("Alert message to be shown");
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
webView.loadUrl("file:///android_asset/error.html");
}
});
webView.setWebChromeClient(new WebChromeClient() {
@Override
public void onPermissionRequest(final PermissionRequest request) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
request.grant(request.getResources());
}
}
// For Android 5.0
public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> filePath, WebChromeClient.FileChooserParams fileChooserParams) {
// Double check that we don't have any existing callbacks
if (mFilePathCallback != null) {
mFilePathCallback.onReceiveValue(null);
}
mFilePathCallback = filePath;
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
takePictureIntent.putExtra("PhotoPath", mCameraPhotoPath);
} catch (IOException ex) {
// Error occurred while creating the File
//Log.e(Common.TAG, "Unable to create Image File", ex);
}
// Continue only if the File was successfully created
if (photoFile != null) {
mCameraPhotoPath = "file:" + photoFile.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
} else {
takePictureIntent = null;
}
}
Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType("image/*");
Intent[] intentArray;
if (takePictureIntent != null) {
intentArray = new Intent[]{takePictureIntent};
} else {
intentArray = new Intent[0];
}
Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE, "Выбор изображения");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
startActivityForResult(chooserIntent, INPUT_FILE_REQUEST_CODE);
return true;
}
// openFileChooser for Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
// Update message
mUploadMessage = uploadMsg;
try{
// Create AndroidExampleFolder at sdcard
File imageStorageDir = new File(
Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES)
, "QualityControl");
if (!imageStorageDir.exists()) {
// Create AndroidExampleFolder at sdcard
imageStorageDir.mkdirs();
}
// Create camera captured image file path and name
File file = new File(
imageStorageDir + File.separator + "IMG_"
+ String.valueOf(System.currentTimeMillis())
+ ".jpg");
mCapturedImageURI = Uri.fromFile(file);
// Camera capture image intent
final Intent captureIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
// Create file chooser intent
Intent chooserIntent = Intent.createChooser(i, "Выбор изображения");
// Set camera intent to file chooser
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
, new Parcelable[] { captureIntent });
// On select image call onActivityResult method of activity
startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
// openFileChooser for Android < 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg){
openFileChooser(uploadMsg, "");
}
//openFileChooser for other Android versions
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType,
String capture) {
openFileChooser(uploadMsg, acceptType);
}
// The webPage has 2 filechoosers and will send a
// console message informing what action to perform,
// taking a photo or updating the file
public boolean onConsoleMessage(ConsoleMessage cm) {
Log.d("androidruntime", "Show console messages, Used for debugging 1: " + cm);
onConsoleMessage(cm.message(), cm.lineNumber(), cm.sourceId());
return true;
}
public void onConsoleMessage(String message, int lineNumber, String sourceID) {
Log.d("androidruntime", "Show console messages, Used for debugging: " + message+" "+lineNumber+" "+sourceID);
}
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
callback.invoke(origin, true, true);
}
}); // End setWebChromeClient
}
@Override
public void onActivityResult (int requestCode, int resultCode, Intent data) {
if (Build.VERSION.SDK_INT >= 21) {
if (requestCode != INPUT_FILE_REQUEST_CODE || mFilePathCallback == null) {
super.onActivityResult(requestCode, resultCode, data);
return;
}
Uri[] results = null;
// Check that the response is a good one
if (resultCode == Activity.RESULT_OK) {
if (data == null) {
// If there is not data, then we may have taken a photo
if (mCameraPhotoPath != null) {
results = new Uri[]{Uri.parse(mCameraPhotoPath)};
}
} else {
String dataString = data.getDataString();
if (dataString != null) {
results = new Uri[]{Uri.parse(dataString)};
}
}
}
mFilePathCallback.onReceiveValue(results);
mFilePathCallback = null;
return;
} else {
if(requestCode==FILECHOOSER_RESULTCODE)
{
if (null == this.mUploadMessage) {
return;
}
Uri result=null;
try{
if (resultCode != RESULT_OK) {
result = null;
} else {
// retrieve from the private variable if the intent is null
result = data == null ? mCapturedImageURI : data.getData();
}
}
catch(Exception e)
{
Toast.makeText(getApplicationContext(), "activity :"+e,
Toast.LENGTH_LONG).show();
}
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
}
// Open previous opened link from history on webview when back button pressed
@Override
// Detect when the back button is pressed
public void onBackPressed() {
if(webView.canGoBack()) {
webView.goBack();
} else {
// Let the system handle the back button
super.onBackPressed();
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.androidmkab.webview">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.CAMERA2" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<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-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera2" />
<uses-feature android:name="android.hardware.location.gps" />
<application
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".MainActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
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>