Develop Reference

Error why working contextual action mode start ActionModeis not applicable for the arguments (ActionMode

I am following a tutorial 11. Exercise: Using the contextual action mode
But I am having this error :
mActionMode = Display.this.startActionMode(mActionModeCallback);
view.setSelected(true);
Error: The method startActionMode(ActionMode.Callback) in the type Activity is not applicable for the arguments (ActionMode.Callback)
I checked this stackoverflow answer
they said to add
ActionBarActivity activity=(ActionBarActivity)getActivity();
activity.startSupportActionMode(modeCallBack);
I had this error
The method getActivity() is undefined for the type Display
what I am doing wrong ? the below is my code.
package com.example.sqlfirst;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBar.Tab;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.view.ActionMode;
import android.view.ActionMode.Callback;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
public class Display extends ActionBarActivity {
private final static String TAG = "MainActivity";
protected Object mActionMode;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid_main);
//have to use getSupportActionBar from android.support.v7.app
// ActionBar actionBar = getSupportActionBar();
//getActionBar().setDisplayHomeAsUpEnabled(true);
ActionBarActivity activity=(ActionBarActivity)getActivity();
activity.startSupportActionMode(modeCallBack);
View view = findViewById(R.id.gridview);
view.setOnLongClickListener(new View.OnLongClickListener() {
// called when the user long-clicks on someView
public boolean onLongClick(View view) {
if (mActionMode != null) {
return false;
}
// start the CAB using the ActionMode.Callback defined above
mActionMode = Display.this.startActionMode(mActionModeCallback);
view.setSelected(true);
return true;
}
});
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
// Send intent to SingleViewActivity
Intent i = new Intent(getApplicationContext(), SingleViewActivity.class);
// Pass image index
i.putExtra("id", position);
startActivity(i);
} });
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_main_actions, menu);
return super.onCreateOptionsMenu(menu);
}
public boolean onOptionsItemSelected(MenuItem item)
{
super.onOptionsItemSelected(item);
switch (item.getItemId()){
case R.id.ic_action_person:
Toast.makeText(this, "Create a new account please", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(this, Register.class);
startActivity(intent);
return true;
case R.id.ic_action_search:
Toast.makeText(this, "Search for new images", Toast.LENGTH_SHORT).show();
Intent isearch= new Intent(this,Search.class);
startActivity(isearch);
return true;
case R.id.ic_action_picture:
Toast.makeText(this, "Search for new photos", Toast.LENGTH_SHORT).show();
Intent iphotos= new Intent(this,Display.class);
startActivity(iphotos);
return true;
}
return true;
}
private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
// Called when the action mode is created; startActionMode() was called
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// inflate a menu resource providing context menu items
MenuInflater inflater = mode.getMenuInflater();
// assumes that you have "contexual.xml" menu resources
inflater.inflate(R.menu.activity_main_actions, menu);
return true;
}
// called each time the action mode is shown. Always called after
// onCreateActionMode, but
// may be called multiple times if the mode is invalidated.
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false; // Return false if nothing is done
}
// called when the user selects a contextual menu item
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
switch (item.getItemId()) {
case R.id.ic_action_picture:
Toast.makeText(Display.this, "Selected menu",
Toast.LENGTH_LONG).show();
mode.finish(); // Action picked, so close the CAB
return true;
default:
return false;
}
}
// called when the user exits the action mode
public void onDestroyActionMode(ActionMode mode) {
mActionMode = null;
}
};
}

Your Display class is extending ActionBarActivity, that means that it´s an Activity so there´s no need to use getActivity(), you can directly make use of the methods like this:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/* this method is available within your ActionBarActivity*/
startSupportActionMode(modeCallBack);
setContentView(R.layout.grid_main);
// The rest of your code comes here
}

Android Switch widget force close

Trying to create a switch in android with default ON state and with OnCheckedChangeListener. But application is force closing. What is wrong? please help. New in android development.
package com.tiumca2013.smarthousecontrol;
import android.app.Activity;
import android.app.Fragment;
import android.bluetooth.BluetoothAdapter;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.Switch;
import android.widget.Toast;
public class MainActivity extends Activity{
private Switch switch1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
switch1 = (Switch) findViewById(R.id.Switch1);
switch1.setChecked(true); // force close
switch1.setOnCheckedChangeListener(new OnCheckedChangeListener() // force close again
{
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if(isChecked)
Toast.makeText(getApplicationContext(),"switch 1 ON",Toast.LENGTH_SHORT).show();
else
Toast.makeText(getApplicationContext(),"switch 1 OFF",Toast.LENGTH_SHORT).show();
}
});
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}

Share button on ActionBarSherlock

i'm a noob developer...I hope that someone can help me with this problem.
I'm going to add a share button to my actionbar (ABS) but I've some problems
my actionbar menu XML
<?xml version="1.0" encoding="utf-8"?>
<item android:id="#+id/menu_item_share"
android:title="Share"
android:showAsAction="ifRoom"
android:actionProviderClass="com.actionbarsherlock.widget.ShareActionProvider" />
my activity
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.widget.ShareActionProvider;
public class DisPlayWebPageActivity extends SherlockActivity {
WebView webview;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
...
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getSupportMenuInflater().inflate(R.menu.actionmenu, menu);
ShareActionProvider myShareActionProvider = (ShareActionProvider) menu.findItem(R.id.menu_item_share).getActionProvider();
Intent myIntent = new Intent();
myIntent.setAction(Intent.ACTION_SEND);
myIntent.putExtra(Intent.EXTRA_TEXT, "page_url");
myIntent.setType("text/plain");
myShareActionProvider.setShareIntent(myIntent);
return true;
}
relevant errors
Error:(52, 8) java: com.actionbarsherlock.internal.view.menu.MenuBuilder is not abstract and does not override abstract method getItem(int) in com.actionbarsherlock.view.Menu
Error:(663, 34) java: getItem(int) in com.actionbarsherlock.internal.view.menu.MenuBuilder cannot implement getItem(int) in com.actionbarsherlock.view.Menu
return type android.view.MenuItem is not compatible with com.actionbarsherlock.view.MenuItem
Error:(605, 34) java: findItem(int) in com.actionbarsherlock.internal.view.menu.MenuBuilder cannot implement findItem(int) in com.actionbarsherlock.view.Menu
return type android.view.MenuItem is not compatible with com.actionbarsherlock.view.MenuItem
Error:(443, 33) java: addSubMenu(int,int,int,int) in com.actionbarsherlock.internal.view.menu.MenuBuilder cannot implement addSubMenu(int,int,int,int) in com.actionbarsherlock.view.Menu
return type android.view.SubMenu is not compatible with com.actionbarsherlock.view.SubMenu
Error:(435, 33) java: addSubMenu(int,int,int,java.lang.CharSequence) in com.actionbarsherlock.internal.view.menu.MenuBuilder cannot implement addSubMenu(int,int,int,java.lang.CharSequence) in com.actionbarsherlock.view.Menu
return type android.view.SubMenu is not compatible with com.actionbarsherlock.view.SubMenu
...
ask me if you need full error log!

#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_setting:
Intent next = new Intent(Home.this, Setting.class);
next.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivityForResult(next, 2);
return true;
}
return true;
}

Displaying Menu items through webview in android application

I am new to Android application development and still learning. I have created a simple web app using webview and that is working well now I have created a menu in my app and trying to add an about and help and exit item on that. Now I would like them to open inside another webview or the existing webview that I have created. I am confused that should I create another method or a class or another way you prefer
I mean when I will choose about from menu then I will be redirected to a page in my asset folder called about.html and for help it will be help.html .
this is my MainActivity.java
package com.example.mywebapp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
private WebView mWebView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
mWebView = new WebView(this);
mWebView.loadUrl("file:///android_asset/index.html");
mWebView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
this.setContentView(mWebView);
}
// For Options Menu
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.about:
// Then it should redirect to "file:///android_asset/about.html"
return true;
case R.id.help:
// Then it will be redirect to "file:///android_asset/help.html"
return true;
case R.id.exit:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
public boolean onKeyDown(final int keyCode, final KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
And my main.xml from layout folder
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<WebView
android:id="#+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>

Found a solution
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.about:
startActivity(new Intent(this, About.class));
return true;
case R.id.exit:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
and then creating a About.class with these code
package com.example.mywebapp;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
public class About extends Activity {
private WebView webView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.about);
webView = (WebView) findViewById(R.id.webView);
//webView.getSettings().setJavaScriptEnabled(true);
//webView.loadUrl("http://www.google.com");
webView.loadUrl("file:///android_asset/about.html");
}
}
and finally in AndroidManifest
<activity
android:name=".About"
android:theme="#android:style/Theme.NoTitleBar" />
i hope this ans would help newbie like me ...

Android Webview: Why Doesn't Refresh Work In Options Menu?

I've been racking my brains over this for ages, but think I'm too close to the woods to see the trees. Can anyone tell me why item1 in the menu below doesn't work to refresh the webview?
(The exit button (item2) works just fine, if that matters.)
package com.my.project;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.view.View;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
public class MyProjectActivity extends Activity
{
final Activity activity = this;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
WebView WebView = (WebView) findViewById(R.id.webview);
WebView.getSettings().setJavaScriptEnabled(true);
WebView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
WebView.loadUrl("http://www.mydomain.php");
}
// Create Menu Buttons
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.options_menu, menu);
return true;
}
// Set Menu Button Actions
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.item1:
reload();
return true;
case R.id.item2:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}

try this just minor changes:::
public class MyProjectActivity extends Activity
{
final Activity activity = this;
WebView webView;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.webview);
webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
webView.loadUrl("http://www.mydomain.php");
}
// Create Menu Buttons
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.options_menu, menu);
return true;
}
// Set Menu Button Actions
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.item1:
webView.reload();
break;
case R.id.item2:
finish();
break
}
return super.onOptionsItemSelected(item);
}
}