在做安卓开发的时候,webview经常因为网络等原因出现各种错误,我改怎么使用代码处理这些错误,请提供代码
时间: 2024-06-11 07:06:33 浏览: 16
以下是一些处理webview错误的常用代码示例:
1. 网络错误:
```java
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
Toast.makeText(MainActivity.this, "网络错误 " + error.getDescription().toString(), Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "网络错误 " + error.toString(), Toast.LENGTH_SHORT).show();
}
}
});
```
2. SSL证书错误:
```java
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
handler.proceed();
}
});
```
3. 文件下载:
```java
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setMimeType(mimetype);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie", cookies);
request.addRequestHeader("User-Agent", userAgent);
request.setDescription("下载文件");
request.setTitle(URLUtil.guessFileName(url, contentDisposition, mimetype));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName(url, contentDisposition, mimetype));
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
Toast.makeText(getApplicationContext(), "文件正在下载中", Toast.LENGTH_LONG).show();
}
});
```
4. 页面加载进度条:
```java
webView.setWebChromeClient(new WebChromeClient() {
@Override
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
progressBar.setProgress(newProgress);
if (newProgress == 100) {
progressBar.setVisibility(View.GONE);
} else {
progressBar.setVisibility(View.VISIBLE);
}
}
});
```
5. 页面加载错误:
```java
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Toast.makeText(MainActivity.this, "页面加载失败 " + description, Toast.LENGTH_SHORT).show();
}
});
```
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