我对Android很新，但是我创建了一个webview，它显示了一个带有PDF下载链接的wordpress页面，但是当我点击它时没有任何事情发生，我希望你可以帮助我：）
清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.freizeitpark.plus"
android:versionCode="1"
android:versionName="1.2" >
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER"/>
<uses-permission android:name="android.permission.CALL_PHONE" />
<application
android:icon="@drawable/app_icon"
android:label="@string/app_name" >
<activity
android:configChanges="keyboard|keyboardHidden|orientation"
android:name="com.google.ads.AdActivity" >
</activity>
<activity
android:label="@string/app_name"
android:name=".SplashActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:configChanges="touchscreen|keyboardHidden|orientation"
android:launchMode="singleTop"
android:name="DroidWebViewActivity" >
</activity>
</application>
</manifest>
主要活动
package com.freizeitpark.plus;
import com.freizeitpark.plus.info.Info;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.WebSettings.LayoutAlgorithm;
import android.webkit.WebSettings.PluginState;
import android.widget.ProgressBar;
public class DroidWebViewActivity extends Activity {
/** Called when the activity is first created. */
Context con;
private WebView fweBview;
private WebSettings webSettings;
ProgressBar progressBar;
String url = Info.WebUrl;
String url22 = Info.WebUrl22;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
con = this;
try {
if (!SharedPreferencesHelper.isOnline(con)) {
AlertMessage.showMessage(con, "", "No internet connection");
return;
}
updateWebView(url);
} catch (Exception e) {
// TODO: handle exception
}
}
private class HelloWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
// TODO Auto-generated method stub
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && fweBview.canGoBack()) {
fweBview.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
private void updateWebView(String url) {
// TODO Auto-generated method stub
progressBar = (ProgressBar) findViewById(R.id.progressBar12);
fweBview = (WebView) findViewById(R.id.fbwebView);
fweBview.getSettings().setJavaScriptEnabled(true);
fweBview.getSettings().setDomStorageEnabled(true);
fweBview.getSettings().setPluginState(PluginState.ON);
webSettings = fweBview.getSettings();
webSettings.setLayoutAlgorithm(LayoutAlgorithm.NARROW_COLUMNS);
webSettings.setBuiltInZoomControls(true);
fweBview.getSettings().setPluginsEnabled(true);
fweBview.loadUrl(url);
fweBview.setWebViewClient(new HelloWebViewClient());
}
// /---- Rating Button-----------------------------
public void btnRating(View v) {
try {
alertbox(null, null);
} catch (Exception e) {
// TODO: handle exception
}
}
protected void alertbox(String title, String mymessage) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Dir gefällt die Freizeitparks Guide+ App? Dann würden wir uns über eine Bewertung sehr freuen :) ").setCancelable(
false).setTitle("").setPositiveButton("Jetzt bewerten",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// finish the current activity
// AlertBoxAdvance.this.finish();
/*
* Intent myIntent = new Intent(
* Settings.ACTION_SECURITY_SETTINGS);
* startActivity(myIntent);
*/
Intent viewIntent = new Intent(
"android.intent.action.VIEW",
Uri
.parse(Info.GooglePlayAppUrl));
startActivity(viewIntent);
dialog.cancel();
}
}).setNegativeButton("Später",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// cancel the dialog box
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
// ------------ Share button---------------------
public void btnShare(View v) {
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT,
" ");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Jetzt die Freizeitparks Guide+ App endlich im Play Store hier kannst du Sie dir kostenlos herunterladen https://play.google.com/store/apps/details?id=com.freizeitpark.plus");
startActivity(Intent.createChooser(sharingIntent, "Weiterempfehlen"));
}
// ------------ Home button---------------------
public void btnHome(View v) {
try {
updateWebView(url);
} catch (Exception e) {
// TODO: handle exception
}
// Intent i = new Intent(DroidWebViewActivity.this,
// DroidWebViewActivity.class); // your class
// startActivity(i);
}
// ------------ Email button---------------------
public void btnEmail(View v) {
Intent email = new Intent(Intent.ACTION_SEND);
email.putExtra(Intent.EXTRA_EMAIL,
new String[] { "" });
email.putExtra(Intent.EXTRA_SUBJECT, Info.eMailSubject);
email.putExtra(Intent.EXTRA_TEXT, Info.eMailDetails);
email.setType("message/rfc822");
startActivity(Intent.createChooser(email, "Per E-Mail :"));
}
// ------------ Call button---------------------
public void btnPhone(View v) {
try {
updateWebView(url22);
} catch (Exception e) {
// TODO: handle exception
}
// Intent i = new Intent(DroidWebViewActivity.this,
// DroidWebViewActivity.class); // your class
// startActivity(i);
}
}
答案 0 :(得分：2)
尝试将此添加到您的代码中:(可能在您的updateWebView方法中）这将拦截任何下载并将它们发送到标准的android下载管理器。
mWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Request request = new Request( Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "myPDFfile.pdf");
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
}
});
请注意，每次都会使用相同的文件名，因此您的文件可能会被替换，除非您修改代码以使用不同的文件名。
答案 1 :(得分：0)
JonasCz 为 kotlin 用户更新了答案，之前请求过存储权限。
webview.setDownloadListener { url, _, _, _, _ ->
if (ContextCompat.checkSelfPermission(context!!, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(activity!!, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), REQUEST_CODE)
} else {
val request = DownloadManager.Request(Uri.parse(url))
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "myPDFfile.pdf")
val dm = context?.getSystemService(DOWNLOAD_SERVICE) as DownloadManager?
dm!!.enqueue(request)
}
}