我正在寻找这段代码的帮助。我需要补充一点，你可以从这个应用程序上传文件。但我不能让它工作得好......所以这很有效。我能做的就是下载，但不能上传文件。我能做什么？我留下下面的代码。请明确和具体。考虑只支持Android 3.0＆gt;。
我的意思是这是一个WebView，当你在网站上时，Facebook触摸上传图像的按钮和一个框，让你选择是否打开图片或查看设备。我要那个。我能做什么？
public class MainActivity extends ActionBarActivity {
private WebView mWebView;
private ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.activity_main_webview);
// Enable Javascript
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.loadUrl("file:///android_asset/www/index.html");
// Force links and redirects to open in the WebView instead of in a browser
mWebView.setWebViewClient(new WebViewClient());
// enable local storage
// enable local storage
mWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
});
webSettings.setBuiltInZoomControls(true);
webSettings.setSupportZoom(true);
progressBar = (ProgressBar) findViewById(R.id.progressbar);
mWebView.setWebChromeClient(new WebChromeClient() {
@Override
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(0);
progressBar.setVisibility(View.VISIBLE);
MainActivity.this.setProgress(progress * 1000);
progressBar.incrementProgressBy(progress);
if (progress == 100) {
progressBar.setVisibility(View.GONE);
}
}
});
}
@Override
public void onBackPressed() {
if (mWebView.canGoBack()) {
mWebView.goBack();
} else {
// Let the system handle the back button
super.onBackPressed();
}
}
public class MyAppWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().length() == 0) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}