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POAndroid - Load WebView from Asset using a Spinner
 

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  1. POAndroid - Load WebView from Asset using a Spinner
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    <p>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. </p> <p>I know I'm making mistakes here and need to learn what I am doing wrong.</p> <pre><code>public class atcSectionWeb extends Activity { public static final int DIALOG_DOWNLOAD_PROGRESS = 0; private ProgressDialog mProgressDialog; Spinner spLoadFrom; private ArrayAdapter&lt;CharSequence&gt; 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&lt;CharSequence&gt;(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&lt;?&gt; 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&lt;?&gt; arg0) { } } } </code></pre> <p>LogCat:</p> <pre><code>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$MethodAndArgsCaller.run(ZygoteInit.java:839) 07-28 23:40:09.438: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 07-28 23:40:09.438: E/AndroidRuntime(584): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Error after copying SALMAN's code:</p> <pre><code>07-29 01:04:58.290: E/AndroidRuntime(532): FATAL EXCEPTION: main 07-29 01:04:58.290: E/AndroidRuntime(532): java.lang.NullPointerException 07-29 01:04:58.290: E/AndroidRuntime(532): at com.assistant.atcSectionWeb$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) </code></pre>
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    1. COCould the problem be that the webview isnt what is listed in setContentView? If so that would defeat the purpose of having a layout with a spinner on it. The user should select the item, submit, and a webview display at that point.
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      1. POAndroid - Load WebView from Asset using a Spinner
      1. USuser1363871
 

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