Develop Reference

How can I make research with space on a edit text keyboard

I've developed a simple browser to research information on the net that has an edit text and a web view.
You can write the keywords in the edit text and press a button to reaserch your keywords on Google and see the results in the web view.
Now I wanna make possible to start the research using the space botton on the keyboard.
Is it possible? How can I do?
This is my code:
public class MainActivity extends AppCompatActivity {
WebView web;
EditText adress;
String url = "";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
web = (WebView) findViewById(R.id.wv);
adress = (EditText) findViewById(R.id.et1);
web.setWebViewClient(new WebViewClient());
web.getSettings().getBuiltInZoomControls();
}
public void Research(View v) {
url += adress.getText().toString();
Toast.makeText(this, "Loading...", Toast.LENGTH_SHORT).show();
web.loadUrl("https://www.google.it/search?q=" + url);
url = "";
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id) {
case R.id.p:
startActivity(new Intent(MainActivity.this, MainActivityBookmarks.class));
break;
case R.id.r:
web.reload();
Toast.makeText(this, "Loading...", Toast.LENGTH_SHORT).show();
break;
case R.id.b:
if (web.canGoBack()) {
web.goBack();
} else {
Toast.makeText(this, "You can't go more back!", Toast.LENGTH_SHORT).show();
}
break;
case R.id.f:
if (web.canGoForward()) {
web.goForward();
} else {
Toast.makeText(this, "You can't go more foward!", Toast.LENGTH_SHORT).show();
}
break;
}
return false;
}}

#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (userPressedKey) {
if (keyCode == KeyEvent.KEYCODE_SPACE) {
adress.setText("");
return true;
}
}
super.onKeyDown(keyCode, event);
}

How to make function back button in actionbar like back button in devices android

I have one activity in which there is a webview. when the webview goes to a few pages and I click the back button on the device runs fine, but if I click the back button in the actionbar then return it wrong.
can I make function back button in action bar like back button in the device?
this is my code :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tes_backbutton);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
view = (WebView)findViewById(R.id.wv_tes);
progressBar = (ProgressBar)findViewById(R.id.prgbarhome);
view.setWebViewClient(new WebViewClient());
view.loadUrl(URL);
view.setWebChromeClient(new WebChromeClient() {
#Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
//Required functionality here
return super.onJsAlert(view, url, message, result);
}
});
view.setWebViewClient(new WebViewClient() {
ProgressDialog progressDialog;
//Show loader on url load
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
if (progressDialog == null) {
// in standard case YourActivity.this
progressDialog = new ProgressDialog(tes_backbutton.this);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
}
public void onPageFinished(WebView view, String url) {
try {
progressDialog.dismiss();
progressDialog = null;
} catch (Exception exception) {
exception.printStackTrace();
}
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Intent myIntent = new Intent(tes_backbutton.this, main_noconnect.class);
tes_backbutton.this.startActivity(myIntent);
}
});
view.canGoBack();
view.setOnKeyListener(new View.OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK
&& event.getAction() == MotionEvent.ACTION_UP
&& view.canGoBack()) {
view.goBack();
return true;
}
return false;
}
});
}
#Override
public boolean onSupportNavigateUp() {
onBackPressed();
return true;
}

You need to override onOptionsItemSelected method if you want to take any action after back arrow is clicked from action bar like below
#Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case android.R.id.home:
onBackPressed(); //finishes the activity
return true;
}
return super.onOptionsItemSelected(menuItem);
}

The 'back' button in the action bar should act differently than the device's back button. You don't want them both to do the same thing. The button in the action bar should serve as an 'up' button rather than a 'back' button. Please read more about Providing Up Navigation.
I hope this helps you.

you can use onBackPressed(); method

#Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case android.R.id.home:
if(mWebView.canGoBack() == true){
mWebView.goBack();
}else{
onBackPressed(); //finishes the activity
}
return true;
}
return super.onOptionsItemSelected(menuItem);
}

you can use webview.cangoback() method for navigating between different web pages in webview
#Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case android.R.id.home:
if(view.cangoback()){
view.goback();
}
else{
finish();
}
break;
}
return super.onOptionsItemSelected(menuItem);
}

Set sharing intent using icon in action bar

I want to share the website that the user is viewing in the webview in my app, however any of the tutorials I have followed, it just isn't working. I can get the icon to load in the action bar but it doesn't click. I have had onclick listeners implemented and nothing so far. The app is only meant for ICS or higher so it doesn't need to be backwards compatible with older androids. The code I am putting up is before any share icon is implemented as I want to do it from scratch or to see if anyone has any ideas to what I can do
public class WebActivity extends Activity {
private WebView mWebView = null;
private EditText mInputUrl = null;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
super.onCreate(savedInstanceState);
getWindow().setFeatureInt( Window.FEATURE_PROGRESS, Window.PROGRESS_VISIBILITY_ON);
setContentView(R.layout.activity_web_view);
Intent intent = getIntent();
String thesite = intent.getStringExtra(MainPage.EXTRA_MESSAGE);
mInputUrl = (EditText)findViewById(R.id.input_url);
Button button = (Button)findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String baseurl = "http://";
String url = baseurl + mInputUrl.getText().toString();
mWebView.loadUrl(url);
}
});
mWebView = (WebView) findViewById(R.id.webview);
mWebView.loadUrl(thesite);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setWebViewClient(new WebViewClient());
mWebView.getSettings().setAllowFileAccess(true);
mWebView.getSettings().setPluginState(WebSettings.PluginState.ON);
mWebView.getSettings().setBuiltInZoomControls(true);
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.getSettings().setUseWideViewPort(true);
mWebView.getSettings().setGeolocationEnabled(true);
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
final Activity MyActivity = this;
mWebView.setWebChromeClient(new WebChromeClient() {
public void onGeolocationPermissionsShowPrompt(String origin, android.webkit.GeolocationPermissions.Callback callback) {
callback.invoke(origin, true, false);
}
public void onProgressChanged(WebView view, int progress)
{
//Make the bar disappear after URL is loaded, and changes string to Loading...
MyActivity.setTitle("Loading...");
MyActivity.setProgress(progress * 100); //Make the bar disappear after URL is loaded
// Return the app name after finish loading
if(progress == 100)
MyActivity.setTitle(R.string.app_name);
}
});
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// Check if the key event was the Back button and if there's history
WebView myWebView = (WebView) findViewById(R.id.webview);
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
myWebView.goBack();
return true;
}
// If it wasn't the Back key or there's no web page history, bubble up to the default
// system behavior (probably exit the activity)
return super.onKeyDown(keyCode, event);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
// http://developer.android.com/design/patterns/navigation.html#up-vs-back
//
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
}
Edit
I have used this code to try and get it working, however when I go to click the icon it doesn't do anything at all.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.share_menu, menu);
return true;
}
#Override
public final boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_item_share:
shareURL();
}
return super.onOptionsItemSelected(item);
}
private void shareURL() {
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("text/plain");
shareIntent.putExtra(Intent.EXTRA_TEXT, mWebView.getUrl());
startActivity(Intent.createChooser(shareIntent, "Share This!"));
}

I have found the answer. It was rather simple in the end.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.share_menu, menu);
return true;
}
#Override
public final boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_item_share:
shareURL();
}
if(item.getItemId() == R.id.menu_item_refresh){
mWebView.reload();
return true;
}
return super.onOptionsItemSelected(item);
}
private void shareURL() {
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("text/plain");
shareIntent.putExtra(Intent.EXTRA_TEXT, mWebView.getUrl());
startActivity(Intent.createChooser(shareIntent, "Share This Website!"));
}
}
This also allowed me to have a refresh button too.

I don't see any override for onCreateOptionsMenu(..), are you sure you have added your ActionItems? Take a look at http://developer.android.com/guide/topics/ui/actionbar.html.
Ali.

Android Back Button With Webview

I am having an issue with the back button in my android app. I am trying to have it go back through the previous pages and if unable then to exit. I pick through the code on the developer website and nothing is working. I would appreciate any help.
Below is my activity page:
WebView webView;
#SuppressLint("SetJavaScriptEnabled")
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webView = (WebView)findViewById(R.id.webView);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webView.setWebViewClient(new myWebView());
webView.loadUrl("http://google.com");
webView.setInitialScale(1);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setUseWideViewPort(true);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// Check if the key event was the Back button and if there's history
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
// If it wasn't the Back key or there's no web page history, bubble up to the default
// system behavior (probably exit the activity)
return super.onKeyDown(keyCode, event);
}
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.diabetes_meal_planner, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch(item.getItemId())
{
case R.id.action_settings:
//exits app
finish();
break;
default:
break;
}
return true;
}
private class myWebView extends WebViewClient
{
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
if(url.startsWith("mailto:"))
{
String[] email = url.split(":");
Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
emailIntent.setType("plain/text");
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{email[1]});
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Send_Us_Your_Email");
Log.v("NOTICE", "Sending Email to" + email[1] + "with subject" + "Send Us Your Feedback");
startActivity(emailIntent);
}
view.loadUrl(url);
return true;
}
}

Dont do this onKeyDown. Override Activity.onBackPressed to do this..

#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView!=null && webView.canGoBack()) {
webView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
Try this at the end, works in my webview app

Android: OnKeyDown problem

I am using onKeyDown for handling the back button but on pressing the back button the application exits whereas it should go back to the previous activity. Following is the code i'm using:
public class NewsDetails extends Activity{
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent myIntent = getIntent();
String id = myIntent.getStringExtra("content_id");
String title = myIntent.getStringExtra("title");
String nTitle = "<font color='white'>"+title+"</font>";
setContentView(R.layout.web);
super.onStart();
final String mimeType = "text/html";
final String encoding = "utf-8";
/*Title*/
WebView wv = (WebView)findViewById(R.id.wv1);
WebSettings webSettings = wv.getSettings();
webSettings.setDefaultFontSize(15);
wv.setBackgroundColor(Color.BLACK);
wv.loadData(nTitle, mimeType, encoding);
/*Body*/
String xml = XMLfunctions.getBodyXML(id);
String result = xml.replaceAll("<p>", "<p><div align=\"justify\">");
String nXml = result.replaceAll("</p>", "</div></p>");
String nBody = "<font color='white'>"+nXml+"</font>" ;
WebView wv1 = (WebView)findViewById(R.id.wv2);
wv1.setBackgroundColor(Color.BLACK);
WebSettings webSettings1 = wv1.getSettings();
webSettings1.setDefaultFontSize(10);
wv1.loadData(nBody, mimeType, encoding);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
Intent intent = new Intent(NewsDetails.this, TopNewsActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
View view = TopNewsGroup.group.getLocalActivityManager().startActivity("ShowNews", intent).getDecorView();
TopNewsGroup.group.setContentView(view);
return true;
}
return super.onKeyDown(keyCode, event);
}
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.optionsmenu, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item){
switch (item.getItemId()){
case R.id.refresh:
startActivity(new Intent(this, NewsDetails.class));
return true;
case R.id.search:
startActivity(new Intent(this, SearchActivity.class));
return true;
case R.id.info:
startActivity(new Intent(this, NewsDetails.class));
return true;
case R.id.exit:
finish();
return true;
}
return false;
}
}

Use the following code in place of onKeyDown(..
#Override
public boolean dispatchKeyEvent(KeyEvent event) {
if (event.getKeyCode() == KeyEvent.KEYCODE_BACK)
{ // do something on back.
Intent lIntentObj = new Intent(NewsDetails.this, TopNewsActivity.classs);
startActivity(lIntentObj);
finish();
return true;
}
return super.dispatchKeyEvent(event);
}

As i'm using ActivityGroup i wasn't using the history stack but on using
public void back() {
if(history.size() > 0) {
history.remove(history.size()-1);
if(history.size()<=0){
finish();
}else{
setContentView(history.get(history.size()-1));
}
}else {
finish();
}
}
#Override
public void onBackPressed() {
TopNewsGroup.group.back();
}
i was able to move back to the previous activity.

This should work. If I remember correctly you should override onKeyDown and handle the back button in onKeyUp:
#Override
public boolean onKeyDown(final int keyCode, final KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
return true;
}
return false;
}
#Override
public boolean onKeyUp(final int keyCode, final KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
Intent intent = new Intent(NewsDetails.this, TopNewsActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
View view = TopNewsGroup.group.getLocalActivityManager().startActivity("ShowNews", intent).getDecorView();
TopNewsGroup.group.setContentView(view);
return true;
}
return false;
}