So I have a spinner that needs to populate a WebView using an HTML

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Asked: June 8, 20262026-06-08T15:09:02+00:00 2026-06-08T15:09:02+00:00

So I have a spinner that needs to populate a WebView using an HTML

0

So I have a spinner that needs to populate a WebView using an HTML file located in the assets folder. I have my code that looks descent but obviously doesn’t work. I will attach the Java and the error.

I know I’m making mistakes here and need to learn what I am doing wrong.

public class atcSectionWeb extends Activity {

public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
private ProgressDialog mProgressDialog;

Spinner spLoadFrom;
private ArrayAdapter<CharSequence> spinnerArrayAdapter;

String name[] = { "1.html", "2.html", "3.html", "etc.html" };
String displayName[] = {"1st Name", "2nd Name", "3rd name", "And So On" };

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.atcsectionweb);

    mProgressDialog = new ProgressDialog(atcSectionWeb.this);
    mProgressDialog.setIndeterminate(false);
    mProgressDialog.setMax(100);
    mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

    spLoadFrom = (Spinner) findViewById(R.id.Spinner02);

    spinnerArrayAdapter = new ArrayAdapter<CharSequence>(this,
            android.R.layout.simple_spinner_item, displayName);
    spinnerArrayAdapter
            .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spLoadFrom.setAdapter(spinnerArrayAdapter);

    SpinnerListener spListener = new SpinnerListener();
    spLoadFrom.setOnItemSelectedListener(spListener);


    Button atcBack = (Button) findViewById(R.id.atcBacksecweb);
    atcBack.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            setResult(RESULT_OK);
            finish();
        }
    });

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu2, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.atcAbout2:
        Intent atcAboutWeb = new Intent(atcSectionWeb.this,
                atcAboutWeb.class);
        startActivity(atcAboutWeb);
        break;
    case R.id.atcContact2:
        emailme();
        break;
    }
    return true;
}

private void emailme() {
    // TODO Auto-generated method stub
    try{
    String domsEmail = "";
    String message = "Insert Message Here";
    String myemail[] = { domsEmail };
    Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
    emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, myemail);
    emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "");
    emailIntent.setType("plain/text");
    emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, message);
    startActivity(emailIntent);
    }catch (Exception  e) {
        Toast.makeText(
                atcSectionWeb.this,
                "No email application is available, please download one from Play store.",
                Toast.LENGTH_LONG).show();

    }
}

public class SpinnerListener implements OnItemSelectedListener {
    public SpinnerListener() {
    }

    public void onItemSelected(AdapterView<?> arg0, View arg1,
            final int position, long arg2) {

        Button atcSection = (Button) findViewById(R.id.atcSubmitweb);
        atcSection.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {

                WebView wv = (WebView)findViewById(R.id.ctiWebView);
                wv.setWebViewClient(new WebViewClient() {  
                      @Override  
                      public boolean shouldOverrideUrlLoading(WebView view, String url)  
                      {  
                        view.loadUrl(url);
                        return true;
                      }  
                    });         
                wv.loadUrl("file:///android_asset/" + position); 




            }
        });

    }

    public void onNothingSelected(AdapterView<?> arg0) {

    }
}
}

LogCat:

07-28 23:40:09.438: E/AndroidRuntime(584): FATAL EXCEPTION: main
07-28 23:40:09.438: E/AndroidRuntime(584): java.lang.NullPointerException
07-28 23:40:09.438: E/AndroidRuntime(584):  at com.assistant.atcSectionWeb$SpinnerListener$1.onClick(atcSectionWeb.java:240)
07-28 23:40:09.438: E/AndroidRuntime(584):  at android.view.View.performClick(View.java:2485)
07-28 23:40:09.438: E/AndroidRuntime(584):  at android.view.View$PerformClick.run(View.java:9080)
07-28 23:40:09.438: E/AndroidRuntime(584):  at android.os.Handler.handleCallback(Handler.java:587)
07-28 23:40:09.438: E/AndroidRuntime(584):  at android.os.Handler.dispatchMessage(Handler.java:92)
07-28 23:40:09.438: E/AndroidRuntime(584):  at android.os.Looper.loop(Looper.java:123)
07-28 23:40:09.438: E/AndroidRuntime(584):  at android.app.ActivityThread.main(ActivityThread.java:3683)
07-28 23:40:09.438: E/AndroidRuntime(584):  at java.lang.reflect.Method.invokeNative(Native Method)
07-28 23:40:09.438: E/AndroidRuntime(584):  at java.lang.reflect.Method.invoke(Method.java:507)
07-28 23:40:09.438: E/AndroidRuntime(584):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-28 23:40:09.438: E/AndroidRuntime(584):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-28 23:40:09.438: E/AndroidRuntime(584):  at dalvik.system.NativeStart.main(Native Method)

Error after copying SALMAN’s code:

07-29 01:04:58.290: E/AndroidRuntime(532): FATAL EXCEPTION: main
07-29 01:04:58.290: E/AndroidRuntime(532): java.lang.NullPointerException
07-29 01:04:58.290: E/AndroidRuntime(532):  at com.assistant.atcSectionWeb$SpinnerListener.onItemSelected(atcSectionWeb.java:236)
07-29 01:04:58.290: E/AndroidRuntime(532):  at android.widget.AdapterView.fireOnSelected(AdapterView.java:871)
07-29 01:04:58.290: E/AndroidRuntime(532):  at android.widget.AdapterView.access$200(AdapterView.java:42)
07-29 01:04:58.290: E/AndroidRuntime(532):  at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:837)
07-29 01:04:58.290: E/AndroidRuntime(532):  at android.os.Handler.handleCallback(Handler.java:587)
07-29 01:04:58.290: E/AndroidRuntime(532):  at android.os.Handler.dispatchMessage(Handler.java:92)
07-29 01:04:58.290: E/AndroidRuntime(532):  at android.os.Looper.loop(Looper.java:123)
07-29 01:04:58.290: E/AndroidRuntime(532):  at android.app.ActivityThread.main(ActivityThread.java:3683)
07-29 01:04:58.290: E/AndroidRuntime(532):  at java.lang.reflect.Method.invokeNative(Native Method)
07-29 01:04:58.290: E/AndroidRuntime(532):  at java.lang.reflect.Method.invoke(Method.java:507)
07-29 01:04:58.290: E/AndroidRuntime(532):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-29 01:04:58.290: E/AndroidRuntime(532):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-29 01:04:58.290: E/AndroidRuntime(532):  at dalvik.system.NativeStart.main(Native Method)

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1 Answer

Editorial Team · Answer 1 · 2026-06-08T15:09:07+00:00

Pasting the whole code of an application just made this for your purpose.

 package asdasd.adasd.ad;


import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;

public class AsdasdasActivity extends Activity {

public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
private ProgressDialog mProgressDialog;

Spinner spLoadFrom;
private ArrayAdapter<CharSequence> spinnerArrayAdapter;

String name[] = { "1.html", "2.html", "3.html"};
String displayName[] = {"1st Name", "2nd Name", "3rd name" };

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    mProgressDialog = new ProgressDialog(AsdasdasActivity.this);
    mProgressDialog.setIndeterminate(false);
    mProgressDialog.setMax(100);
    mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

    spLoadFrom = (Spinner) findViewById(R.id.Spinner02);

    spinnerArrayAdapter = new ArrayAdapter<CharSequence>(this,
            android.R.layout.simple_spinner_item, displayName);
    spinnerArrayAdapter
            .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spLoadFrom.setAdapter(spinnerArrayAdapter);

    SpinnerListener spListener = new SpinnerListener();
    spLoadFrom.setOnItemSelectedListener(spListener);


    WebView wv = (WebView)findViewById(R.id.webView1);

    wv.getSettings().setJavaScriptEnabled(true);
 /*   wv.setWebViewClient(new WebViewClient() {  
          @Override  
          public boolean shouldOverrideUrlLoading(WebView view, String url)  
          {  
            view.loadUrl(url);
            return true;
          }  
        });    
        */     
    wv.loadUrl("file:///android_asset/htmlfileMine.html"); 


    Button atcBack = (Button) findViewById(R.id.atcBacksecweb);
    atcBack.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            setResult(RESULT_OK);
            finish();
        }
    });

}



private void emailme() {
    // TODO Auto-generated method stub
    try{
    String domsEmail = "";
    String message = "Insert Message Here";
    String myemail[] = { domsEmail };
    Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
    emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, myemail);
    emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "");
    emailIntent.setType("plain/text");
    emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, message);
    startActivity(emailIntent);
    }catch (Exception  e) {
        Toast.makeText(
                AsdasdasActivity.this,
                "No email application is available, please download one from Play store.",
                Toast.LENGTH_LONG).show();

    }
}

public class SpinnerListener implements OnItemSelectedListener {
    public SpinnerListener() {
    }

    public void onItemSelected(AdapterView<?> arg0, View arg1,
            final int position, long arg2) {


                WebView wv = (WebView)findViewById(R.id.webView1);

                wv.getSettings().setJavaScriptEnabled(true);
               wv.setWebViewClient(new WebViewClient() {  
                      @Override  
                      public boolean shouldOverrideUrlLoading(WebView view, String url)  
                      {  
                        view.loadUrl(url);
                        return true;
                      }  
                    });    

                wv.loadUrl("file:///android_asset/"+name[position]); 






    }

    public void onNothingSelected(AdapterView<?> arg0) {

    }
}
}

/// XML LAYOUT

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <Spinner
        android:id="@+id/Spinner02"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <ProgressBar
        android:id="@+id/progressBar1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/atcSubmitweb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

    <Button
        android:id="@+id/atcBacksecweb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

    <WebView
        android:id="@+id/webView1"
        android:layout_width="300dp"
        android:layout_height="300dp" />

</LinearLayout>

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