Java 如何在my web view应用程序中启用下载。这是我的密码

现在我有一些文件，当我点击文件时，用户可以使用webview从网站下载，他们没有响应，下载也没有开始。 同样，我不能使用webview上传文件

如何在webview上启用下载，以便通过此应用程序下载文件

MyAppWebViewClient.java

 package xyz.hamsterwheelengineer.www.minutenotes;    

 import android.content.Intent;
 import android.net.Uri;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.webkit.DownloadListener;


 public class MyAppWebViewClient extends WebViewClient {
 @Override
 public boolean shouldOverrideUrlLoading(WebView view, String url) {

 if(Uri.parse(url).getHost().endsWith(("hamsterwheelengineer.xyz"))) {
 return false;
    }

    if(Uri.parse(url).getHost().endsWith(("google.com"))) {
        return false;
    }


    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
    view.getContext().startActivity(intent);
    return true;
  }
 }

package xyz.hamsterwheelengineer.www.minutenotes;

import android.net.Uri;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.ShareActionProvider;
import android.webkit.DownloadListener;

public class MainActivity extends Activity {

private WebView mWebView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mWebView = (WebView) findViewById(R.id.activity_main_webview);
    WebSettings webSettings = mWebView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    mWebView.loadUrl("http://hamsterwheelengineer.xyz/");
    mWebView.setWebViewClient(new xyz.hamsterwheelengineer.www.minutenotes.MyAppWebViewClient(){
        @Override
        public void onPageFinished(WebView view, String url) {
            //hide loading image
            findViewById(R.id.progressBar1).setVisibility(View.GONE);
            //show webview
            findViewById(R.id.activity_main_webview).setVisibility(View.VISIBLE);
        }});


}



@Override
public void onBackPressed() {
    if(mWebView.canGoBack()) {
        mWebView.goBack();
    } else {
        super.onBackPressed();
    }
}


private ShareActionProvider mShareActionProvider;
@Override
public boolean onCreateOptionsMenu(Menu menu) {

    /** Inflating the current activity's menu with res/menu/items.xml */
    getMenuInflater().inflate(R.menu.menu_main, menu);

    /** Getting the actionprovider associated with the menu item whose id is share */
    mShareActionProvider = (ShareActionProvider) menu.findItem(R.id.share).getActionProvider();

    /** Setting a share intent */
    mShareActionProvider.setShareIntent(getDefaultShareIntent());

    return super.onCreateOptionsMenu(menu);

}

/** Returns a share intent */
private Intent getDefaultShareIntent(){
    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("text/plain");
    intent.putExtra(Intent.EXTRA_SUBJECT, "minuteNotes - Get all of your engineering notes at one place");
    intent.putExtra(Intent.EXTRA_TEXT," Visit www.hamsterwheelengineer.xyz or download our minuteNotes app from the playstore to begin.");
    return intent;
}


}

MainActivity.java

 package xyz.hamsterwheelengineer.www.minutenotes;    

 import android.content.Intent;
 import android.net.Uri;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.webkit.DownloadListener;


 public class MyAppWebViewClient extends WebViewClient {
 @Override
 public boolean shouldOverrideUrlLoading(WebView view, String url) {

 if(Uri.parse(url).getHost().endsWith(("hamsterwheelengineer.xyz"))) {
 return false;
    }

    if(Uri.parse(url).getHost().endsWith(("google.com"))) {
        return false;
    }


    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
    view.getContext().startActivity(intent);
    return true;
  }
 }

package xyz.hamsterwheelengineer.www.minutenotes;

import android.net.Uri;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.ShareActionProvider;
import android.webkit.DownloadListener;

public class MainActivity extends Activity {

private WebView mWebView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mWebView = (WebView) findViewById(R.id.activity_main_webview);
    WebSettings webSettings = mWebView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    mWebView.loadUrl("http://hamsterwheelengineer.xyz/");
    mWebView.setWebViewClient(new xyz.hamsterwheelengineer.www.minutenotes.MyAppWebViewClient(){
        @Override
        public void onPageFinished(WebView view, String url) {
            //hide loading image
            findViewById(R.id.progressBar1).setVisibility(View.GONE);
            //show webview
            findViewById(R.id.activity_main_webview).setVisibility(View.VISIBLE);
        }});


}



@Override
public void onBackPressed() {
    if(mWebView.canGoBack()) {
        mWebView.goBack();
    } else {
        super.onBackPressed();
    }
}


private ShareActionProvider mShareActionProvider;
@Override
public boolean onCreateOptionsMenu(Menu menu) {

    /** Inflating the current activity's menu with res/menu/items.xml */
    getMenuInflater().inflate(R.menu.menu_main, menu);

    /** Getting the actionprovider associated with the menu item whose id is share */
    mShareActionProvider = (ShareActionProvider) menu.findItem(R.id.share).getActionProvider();

    /** Setting a share intent */
    mShareActionProvider.setShareIntent(getDefaultShareIntent());

    return super.onCreateOptionsMenu(menu);

}

/** Returns a share intent */
private Intent getDefaultShareIntent(){
    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("text/plain");
    intent.putExtra(Intent.EXTRA_SUBJECT, "minuteNotes - Get all of your engineering notes at one place");
    intent.putExtra(Intent.EXTRA_TEXT," Visit www.hamsterwheelengineer.xyz or download our minuteNotes app from the playstore to begin.");
    return intent;
}


}

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如果您想开发完全混合的应用程序，如在webview中使用html、css，则不可能在webview中添加任何视图。您可以使用phoneGap。 在您的情况下，如果您想在webview中添加一个按钮，并在该按钮上单击想要下载的内容，那么我给您的建议是使用PhoneGap

http://phonegap.com/

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我知道这可以通过android studio在webview中完成。所以我不会选择phonegap。谢谢