我是Android应用程序开发的新手，试图开发一个Web视图应用程序，但似乎无法让文件上传工作......请帮忙
这是我的网络视图代码
package com.example.project;
公共类WebActivity扩展了Activity {
private WebView wv;
private String LASTURL = "";
Menu myMenu = null;
private ProgressDialog dialog;
private ValueCallback<Uri> mUploadMessage;
private final static int FILECHOOSER_RESULTCODE=1;
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
if(requestCode==FILECHOOSER_RESULTCODE)
{
if (null == mUploadMessage) return;
Uri result = intent == null || resultCode != RESULT_OK ? null
: intent.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
if (!InternetConnection.checkNetworkConnection(this)) {
showAlert(this, "No Data Connection", "This Application requires an internet connection");
} else {
setContentView(R.layout.web_view);
wv = (WebView) findViewById(R.id.web_view);
WebSettings webSettings = wv.getSettings();
webSettings.setSavePassword(true);
webSettings.setSaveFormData(true);
webSettings.setJavaScriptEnabled(true);
webSettings.setUseWideViewPort(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setSupportZoom(false);
final Activity activity = this;
// start ProgressDialog with "Page loading..."
dialog = new ProgressDialog(activity);
dialog.setMessage("Loading...");
dialog.setIndeterminate(true);
dialog.setCancelable(true);
dialog.show();
wv.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
// set address bar and progress
// activity.setTitle( " " + LASTURL );
// activity.setProgress( progress * 100 );
if (progress == 100) {
// stop ProgressDialog after loading
dialog.dismiss();
// activity.setTitle( " " + LASTURL );
}
}
});
wv.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
Toast.makeText(getApplicationContext(),
"Error: " + description + " " + failingUrl,
Toast.LENGTH_LONG).show();
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.indexOf("mycitygist") <= 0) {
// the link is not for a page on my site, so launch
// another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri
.parse(url));
startActivity(intent);
return true;
}
return false;
}
/*****************************************************************/
/* Here the load of the page will start so we must launch the */
/* ProgressDialog */
/*****************************************************************/
public void onPageStarted(WebView view, String url,
Bitmap favicon) {
// this is what we should do
dialog.setMessage("Loading...");
dialog.setIndeterminate(true);
dialog.setCancelable(true);
dialog.show();
//
LASTURL = url;
view.getSettings().setLoadsImagesAutomatically(true);
view.getSettings().setBuiltInZoomControls(true);
}
/*****************************************************************/
/* Here the load of the page will stop so we must dismiss the */
/* ProgressDialog */
/*****************************************************************/
public void onPageFinished(WebView view, String url) {
// this is what we should do
dialog.dismiss();
}
});
wv.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
wv.setScrollbarFadingEnabled(false);
wv.loadUrl("http://app.mycitygist.com/overview/");
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && wv.canGoBack()) {
wv.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
this.myMenu = menu;
MenuItem item = menu.add(0, 1, 0, "Home");
item.setIcon(R.drawable.home);
MenuItem item2 = menu.add(0, 2, 0, "Back");
item2.setIcon(R.drawable.arrowleft);
MenuItem item3 = menu.add(0, 3, 0, "Reload");
item3.setIcon(R.drawable.s);
MenuItem item4 = menu.add(0, 4, 0, "Share");
item4.setIcon(R.drawable.share);
MenuItem item5 = menu.add(0, 5, 0, "Rate");
item5.setIcon(R.drawable.vote);
MenuItem item6 = menu.add(0, 6, 0, "Exit");
item6.setIcon(R.drawable.close);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case 1:
wv.loadUrl("http://http://app.mycitygist.com/overview/");
break;
case 2:
if (wv.canGoBack()) {
wv.goBack();
}
break;
case 3:
wv.loadUrl(LASTURL);
break;
case 4:
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setType("plain/text");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Check out this app I found.");
startActivity(Intent.createChooser(sharingIntent,"Share using"));
break;
case 5:
Intent marketIntent2 = new Intent(Intent.ACTION_VIEW, Uri.parse(
"http://market.android.com/details?id=" + getPackageName()));
startActivity(marketIntent2);
break;
case 6:
finish();
break;
}
return true;
}
/**
* Display a simple alert dialog with the given text and title.
*
* @param context
* Android context in which the dialog should be displayed
* @param title
* Alert dialog title
* @param text
* Alert dialog message
*/
public void showAlert(Context context, String title, String text) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
// set title
alertDialogBuilder.setTitle( title);
// set dialog message
alertDialogBuilder
.setMessage( text )
.setCancelable(false)
.setPositiveButton("OK",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
finish();
}
})
.create().show();
}
}
所以我在wv下添加了这段代码。 setWebChromeClient
//未记录的魔法方法覆盖
//如果你试图把@Override放在这里，Eclipse会发誓你
//适用于Android 3.0及更高版本
public void openFileChooser（ValueCallback uploadMsg）{
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
WebActivity.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FILECHOOSER_RESULTCODE);
}
// For Android 3.0+
public void openFileChooser( ValueCallback uploadMsg, String acceptType ) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
WebActivity.this.startActivityForResult(
Intent.createChooser(i, "File Browser"),
FILECHOOSER_RESULTCODE);
}
//For Android 4.1
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
WebActivity.this.startActivityForResult( Intent.createChooser( i, "File Chooser" ), WebActivity.FILECHOOSER_RESULTCODE );
}
});
setContentView(wv);
}
}
似乎无法使用这行代码编译应用程序，如果没有它，d app编译得很好并且运行良好但没有文件上传功能
答案 0 :(得分：0)
请参阅此代码，我正在使用“文件选择”按钮来选择文件，稍后将在我的jsp中使用上载
void InsereNaPosicaoMaisBarata (list<int>& Rota, // <-- passed by reference
int vehicle,
int no,
DATA data,
double &melhorDur,
list <int>::iterator &melhorPos )