下面列出了android.webkit.WebView#post ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* 弹出日期选择对话框
* <p>
* 参数：
* title： 标题
* datetime： 指定日期 yyyy-MM-dd
* 返回：
* date： 格式：yyyy-MM-dd
*/
public static void pickDate(final IQuickFragment webLoader, WebView wv, JSONObject param, final Callback callback) {
final String title = param.optString("title");
String date = param.optString("datetime");
final Calendar calendar = Calendar.getInstance();
if (!TextUtils.isEmpty(date)) {
calendar.setTime(DateUtil.convertString2Date(date, "yyyy-MM-dd"));
}
wv.post(new Runnable() {
public void run() {
DialogUtil.pickDate(webLoader.getPageControl().getActivity(), title, calendar, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, monthOfYear);
calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
String chooseDate = DateUtil.convertDate(calendar.getTime(), "yyyy-MM-dd");
Map<String, Object> map = new HashMap<>();
map.put("date", chooseDate);
callback.applySuccess(map);
}
});
}
});
}
@Override
public void onProgressChanged(WebView view, int newProgress)
{
if (mLoadingProgressIndicator != null && mLoadingProgressIndicator.getVisibility() == View.VISIBLE)
{
int curWidth = view.getWidth() * newProgress / 100;
mLoadingProgressIndicator.getLayoutParams().width = curWidth;
mLoadingProgressIndicator.requestLayout();
if (curWidth == view.getWidth())
{
view.post(new Runnable()
{
@Override
public void run()
{
mLoadingProgressIndicator.getLayoutParams().width = 0;
mLoadingProgressIndicator.requestLayout();
}
});
}
}
}
@Override
public View initView(Bundle savedInstanceState) {
View v = LayoutInflater.from(this).inflate(R.layout.activity_browser2, null);
final String host = getIntent().getStringExtra("HOST");
final WebView mWeb = (WebView) v.findViewById(R.id.web);
mWeb.getSettings().setJavaScriptEnabled(true);
mWeb.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
mWeb.post(new Runnable() {
@Override
public void run() {
// mWeb.loadDataWithBaseURL(Constants.BASE_URL, host, Constants.MIME_TYPE, Constants.ENCODING, Constants.FAIL_URL);
mWeb.loadUrl("http://svpano.oss-cn-hangzhou.aliyuncs.com/test/pinan/20066_20160527090324857/index.html?from=singlemessage&isappinstalled=0");
}
});
return v;
}
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vr);
mWeb = (WebView) findViewById(R.id.wb);
mWeb.getSettings().setJavaScriptEnabled(true);
mWeb.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
mWeb.post(new Runnable() {
@Override
public void run() {
// mWeb.loadDataWithBaseURL(Constants.BASE_URL, host, Constants.MIME_TYPE, Constants.ENCODING, Constants.FAIL_URL);
mWeb.loadUrl("http://svpano.oss-cn-hangzhou.aliyuncs.com/test/pinan/20066_20160527090324857/index.html?from=singlemessage&isappinstalled=0");
}
});
}
/**
* Evaluates a script on a given WebView.
*
* <p>Scripts are only evaluated when a WebView is deemed sane. That is:
*
* <ul>
* <li>The WebView's back/forward list's last item agrees with the WebView
* <li>The WebView's reported content height is non-zero
* <li>The WebView's reported progress is 100
* <li>The document.documentElement object for the DOM of the selected window is non-null
* <ul>
* Scripts are evaluated on the WebKit/Chromium thread (that is - not the Main thread). A
* Future is returned which contains the result of the evaluation.
*/
static ListenableFuture<Evaluation> evaluate(
final WebView view,
final String script,
final List<Object> arguments,
@Nullable final WindowReference window) {
UnpreparedScript unprepared = new UnpreparedScript(view, script, arguments, window);
SanitizerTask sanitizer = new SanitizerTask(unprepared);
view.post(sanitizer);
ListenableFuture<PreparedScript> preparedScript =
transform(sanitizer, SCRIPT_PREPARER, directExecutor());
ListenableFuture<String> rawEvaluation =
transformAsync(preparedScript, RAW_EVALUATOR, directExecutor());
ListenableFuture<Evaluation> parsedEvaluation =
transform(rawEvaluation, DECODE_EVALUATION, directExecutor());
return parsedEvaluation;
}
@Override
public WebResourceResponse shouldInterceptRequest(final WebView webView, String url) {
//运行在子线程
Log.d(POP_TAG,"接收的url是:"+url);
//hrzapi.invoke("printService",{'name':'123','param1':'123'})
if(url.contains("__HRZ_QUEUE_HAS_MESSAGE_V1")){
return null;
}
if (url.contains("hrz_client_msg")) {
webView.post(new Runnable() {
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void run() {
//必须运行在主线程
webView.evaluateJavascript("javascript:__HRZCJSBridgeObject.drainMessageQueue();", new ValueCallback<String>() {
@Override
public void onReceiveValue(String value) {
Log.d(POP_TAG,"onReceiveValue:"+value);
String postJson = value.replaceAll("\\\\", "");
if (!TextUtils.isEmpty(postJson)) {
if (mHybirdImpl != null) {
mHybirdImpl.invokeAppServices(postJson);
}
}
}
});
}
});
return null;
}
return shouldInterceptRequest(webView, url);
}
private void injectScriptFile(WebView view) {
String js = jsInjectorClient.assembleJs(view.getContext(), "%1$s%2$s");
byte[] buffer = js.getBytes();
String encoded = Base64.encodeToString(buffer, Base64.NO_WRAP);
view.post(() -> view.loadUrl("javascript:(function() {" +
"var parent = document.getElementsByTagName('head').item(0);" +
"var script = document.createElement('script');" +
"script.type = 'text/javascript';" +
// Tell the browser to BASE64-decode the string into your script !!!
"script.innerHTML = window.atob('" + encoded + "');" +
"parent.appendChild(script)" +
"})()"));
}
private void injectScriptFile(WebView view) {
String js = jsInjectorClient.assembleJs(view.getContext(), "%1$s%2$s");
byte[] buffer = js.getBytes();
String encoded = Base64.encodeToString(buffer, Base64.NO_WRAP);
view.post(() -> view.loadUrl("javascript:(function() {" +
"var parent = document.getElementsByTagName('head').item(0);" +
"var script = document.createElement('script');" +
"script.type = 'text/javascript';" +
// Tell the browser to BASE64-decode the string into your script !!!
"script.innerHTML = window.atob('" + encoded + "');" +
"parent.appendChild(script)" +
"})()"));
}
/**
* 隐藏loading图标
*/
public static void closeWaiting(final IQuickFragment webLoader, WebView wv, JSONObject param, final Callback callback) {
wv.post(new Runnable() {
public void run() {
webLoader.getPageControl().hideLoading();
callback.applySuccess();
}
});
}
public void sendResponseMessage(PluginCall call, PluginResult successResult, PluginResult errorResult) {
try {
PluginResult data = new PluginResult();
data.put("save", call.isSaved());
data.put("callbackId", call.getCallbackId());
data.put("pluginId", call.getPluginId());
data.put("methodName", call.getMethodName());
if (errorResult != null) {
data.put("success", false);
data.put("error", errorResult);
Log.d(LogUtils.getCoreTag(), "Sending plugin error: " + data.toString());
} else {
data.put("success", true);
data.put("data", successResult);
}
// Only eval the JS code if this is a valid callback id
if (!call.getCallbackId().equals(PluginCall.CALLBACK_ID_DANGLING)) {
final String runScript = "window.Capacitor.fromNative(" + data.toString() + ")";
final WebView webView = this.webView;
webView.post(new Runnable() {
@Override
public void run() {
webView.evaluateJavascript(runScript, null);
}
});
} else {
bridge.storeDanglingPluginResult(call, data);
}
} catch (Exception ex) {
Log.e(LogUtils.getCoreTag(), "sendResponseMessage: error: " + ex);
}
}
@Override
public WebResourceResponse shouldInterceptRequest(WebView view, final WebResourceRequest request) {
// Only update the user visible URL if:
// 1. The purported site URL has actually been requested
// 2. And it's being loaded for the main frame (and not a fake/hidden/iframe request)
// Note also: shouldInterceptRequest() runs on a background thread, so we can't actually
// query WebView.getURL().
// We update the URL when loading has finished too (redirects can happen after a request has been
// made in which case we don't get shouldInterceptRequest with the final URL), but this
// allows us to update the URL during loading.
if (request.isForMainFrame()) {
// WebView will always add a trailing / to the request URL, but currentPageURL may or may
// not have a trailing URL (usually no trailing / when a link is entered via UrlInputFragment),
// hence we do a somewhat convoluted test:
final String requestURL = request.getUrl().toString();
final String currentURL = currentPageURL;
if (UrlUtils.urlsMatchExceptForTrailingSlash(currentURL, requestURL)) {
view.post(new Runnable() {
@Override
public void run() {
if (callback != null) {
callback.onURLChanged(currentURL);
}
}
});
}
if (callback != null) {
callback.onRequest(request.hasGesture());
}
}
return super.shouldInterceptRequest(view, request);
}
private static JSONObject callAPICallbackComplete(final WebView wv, JSONObject inJsonObj, final JSONObject outJsonObj) {
final String callbackID = JSBridge.getString(inJsonObj, "callbackID");
if(callbackID != null) {
String str = JSBridge.getString(inJsonObj, "removeAfterExecute");
if(str == null) str = "true";
final String removeAfterExecute = str;
wv.post(new Runnable() {
@Override
public void run() {
wv.loadUrl("javascript: JSBridge._invokeJSCallback('"+callbackID+"',"+removeAfterExecute+",'"+outJsonObj.toString()+"');");
}
});
}
return outJsonObj;
}
static void fixZoomIn(final WebView webView, final int expectedWidth, final int expectedHeight) {
final int minViewHeight = 10;
//500 millis to find a webViewContentHeight
//usually it takes 200 millis
final int contentHeightDelayMillis = 100;
int queueLimit = 5;
final LimitedQueueContainer<Integer> contentHeightQueue = new LimitedQueueContainer<>(queueLimit);
final Set<Integer> contentHeightSet = new HashSet<>(queueLimit);
webView.post(new Runnable() {
@Override
public void run() {
int webViewHeight = webView.getHeight();
//case: check if a publisher have called PublisherAdView.setAdSizes()
//if publisher does not call PublisherAdView.setAdSizes() it is less then 10(e.g 3 instead of 750)
if (webViewHeight > minViewHeight) {
int webViewContentHeight = webView.getContentHeight();
//case: wait when webView.getContentHeight() >= expected height from HTML
//webView does not contain getContentWidth()
if (webViewContentHeight < expectedHeight) {
LogUtil.d("fixZoomIn" + " webViewContentHeight:" + webViewContentHeight);
contentHeightQueue.add(webViewContentHeight);
if (contentHeightQueue.isFull()) {
contentHeightSet.clear();
contentHeightSet.addAll(contentHeightQueue.getList());
if (contentHeightSet.size() == 1) {
//case: if it is not possible to get an expected height se scale as is
setWebViewScale(webView, webViewHeight, webViewContentHeight);
return;
}
}
webView.postDelayed(this, contentHeightDelayMillis);
} else {
setWebViewScale(webView, webViewHeight, webViewContentHeight);
}
}
}
});
}