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POScope Variable issue for onKeyDown event
 

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  1. POScope Variable issue for onKeyDown event
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    <p>I am having trouble using the var "str" in an if statement. I know that it is a scope problem but I am not sure how to fix it. I have failed several times.</p> <p>My goal is to use the value of "str" in an if statement to show an alert or not. Restriction is I have to assign the value of "str" this way only.</p> <pre><code> public class MyJavaScriptInterface { public String showHTML(String html) { String str = html; return str; } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { //Handle the back button if(keyCode == KeyEvent.KEYCODE_BACK &amp;&amp; str =="0") { //Ask the user if they want to quit </code></pre> <h1>Update:</h1> <p>OK I was try not to bother you with reading the whole code but it's short and it might help. </p> <p>In a webview I show the html page and I also read a hidden variable which will decide if an alert box should show or not. I am just trying to get that value to the if statement in the keydown push. Here is the whole code.</p> <pre><code>package com.ishop.pizzaoven; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.view.KeyEvent; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Toast; public class buttonOne extends Activity { WebView wb = null; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.buttons); wb = new WebView(this); wb.getSettings().setJavaScriptEnabled(true); wb.setWebViewClient(new HelloWebViewClient()); wb.getSettings().setJavaScriptEnabled(true); wb.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT"); /* WebViewClient must be set BEFORE calling loadUrl! */ wb.setWebViewClient(new WebViewClient() { @Override public void onPageFinished(WebView view, String url) { /* This call inject JavaScript into the page which just finished loading. */ wb.loadUrl("javascript:window.HTMLOUT.showHTML(document.getElementById('sendtextcoupon').value);"); } }); wb.loadUrl("http://ishopstark.com/mobileapp.php?category=1"); setContentView(wb); } private class HelloWebViewClient extends WebViewClient { public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true; } } final Context myApp = this; public class MyJavaScriptInterface { public void showHTML(String html) { String str = html; } } public boolean onKeyDown(int keyCode, KeyEvent event) { //Handle the back button if(keyCode == KeyEvent.KEYCODE_BACK) { //Ask the user if they want to quit new AlertDialog.Builder(this) .setIcon(android.R.drawable.ic_dialog_alert) .setTitle("Coupon") .setMessage("Do you want a coupon texted to you?") .setPositiveButton("YES!", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //Stop the activity Toast.makeText(buttonOne.this, "Great! You'll get one in just a couple of minutes.", Toast.LENGTH_LONG).show(); finish(); } }) .setNegativeButton("Not now", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //Stop the activity finish(); } }) .show(); return true; } else { return super.onKeyDown(keyCode, event); } } }// End of main class </code></pre> <h1>Update 2:</h1> <p>ok so i changed my code a bit. But now I get alert errors any ideas? "The method setIcon(int) is undefined for the type buttonOne.MyJavaScriptInterface" I get this error on .setIcon(android.R.drawable.ic_dialog_alert) and return super.onKeyDown(keyCode, event);</p> <pre><code>public class MyJavaScriptInterface { public String showHTML(String html) { String str = html; return str; } public boolean onKeyDown(int keyCode, KeyEvent event, String str) { //Handle the back button if(keyCode == KeyEvent.KEYCODE_BACK &amp;&amp; str == "0") { //Ask the user if they want to quit AlertDialog.Builder alertbox = new AlertDialog.Builder(buttonOne.this); .setIcon(android.R.drawable.ic_dialog_alert) .setTitle("Coupon") .setMessage("Do you want a coupon texted to you?") .setPositiveButton("YES!", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //Stop the activity Toast.makeText(buttonOne.this, "Great! You'll get one in just a couple of minutes.", Toast.LENGTH_LONG).show(); finish(); } }) .setNegativeButton("Not now", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //Stop the activity finish(); } }) .show(); return true; } else { return super.onKeyDown(keyCode, event); } } } </code></pre>
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    1. USRick
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    1. COAlong with answer @Steve, I would say to use String's **equals** method instead **==**.
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      1. POScope Variable issue for onKeyDown event
      1. USAsad Rasheed
    2. COWhat class does the onKeyDown event handler live in?
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      1. USShane Wealti
 

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