我添加了一个 webview 活动，并希望控制我的最终用户将通过我的应用程序下载的文件夹。这些文件将是 pdf 文件，我希望它们进入我的应用程序使用的特定文件夹，而不是默认下载文件夹。
public class myweb extends Activity {
private WebView myWebView;
private String LOG_TAG = "AndroidWebViewActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.knitweb);
myWebView = (WebView) findViewById(R.id.webView1);
//enable Javascript
myWebView.getSettings().setJavaScriptEnabled(true);
//loads the WebView completely zoomed out
myWebView.getSettings().setLoadWithOverviewMode(true);
//true makes the Webview have a normal viewport such as a normal desktop browser
//when false the webview will have a viewport constrained to it's own dimensions
myWebView.getSettings().setUseWideViewPort(true);
//override the web client to open all links in the same webview
myWebView.setWebViewClient(new MyWebViewClient());
myWebView.setWebChromeClient(new MyWebChromeClient());
//Injects the supplied Java object into this WebView. The object is injected into the
//JavaScript context of the main frame, using the supplied name. This allows the
//Java object's public methods to be accessed from JavaScript.
myWebView.addJavascriptInterface(new JavaScriptInterface(this), "Android");
//load the home page URL
//myWebView.loadUrl("http://demo.mysamplecode.com/Servlets_JSP/pages/androidWebView.jsp");
myWebView.loadUrl("http://www.patonsyarns.com/pattern.php?PID=4521&cps=21191");
myWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype, long contentLength) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
}
});
}
private class MyWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("demo.mysamplecode.com")) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
private class MyWebChromeClient extends WebChromeClient {
//display alert message in Web View
@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.d(LOG_TAG, message);
new AlertDialog.Builder(view.getContext())
.setMessage(message).setCancelable(true).show();
result.confirm();
return true;
}
}
public class JavaScriptInterface {
Context mContext;
// Instantiate the interface and set the context
JavaScriptInterface(Context c) {
mContext = c;
}
//using Javascript to call the finish activity
public void closeMyActivity() {
finish();
}
}
//Web view has record of all pages visited so you can go back and forth
//just override the back button to go back in history if there is page
//available for display
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
myWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
我事先不知道用户将下载哪些文件，除了它们将是 pdf 文件。
任何帮助都会很棒谢谢