Develop Reference

Android Menu not Showing

I'd like to make a menu with a delete option. The actual delete functionality isn't made yet because at the moment I can't see the top bar in my app.
Main layout (activity_main.xml):
<?xml version="1.0" encoding="utf-8"?>
<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="billy.cs436.placebadgesapp.MainActivity">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/newPlace"
android:text="#string/newPlaceButton"
/>
</RelativeLayout>
Menu layout (main.xml):
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/deleteMenu"
android:icon="#drawable/clear"
android:title="#string/deleteMenu"
app:showAsAction="ifRoom"
/>
</menu>
Main activity (MainActivity.java):
package billy.cs436.placebadgesapp;
import android.content.Intent;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
public class MainActivity extends Activity {
Button newPlace;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
newPlace = (Button) findViewById(R.id.newPlace);
newPlace.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), setLocation.class);
startActivity(intent);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the main; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);//Menu Resource, Menu
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.deleteMenu) {
// if there are no badges, toast message saying so (needs implementing)
Toast.makeText(this, "There are no badges to delete!", Toast.LENGTH_SHORT).show();
//else clear all badges
} else {
Toast.makeText(this, "Badges cleared!", Toast.LENGTH_SHORT).show();
}
return super.onOptionsItemSelected(item);
}
}
Can anyone tell my why the New Place button is the only thing that shows up when this is run?
EDIT:
#T.S has the correct answer. Thank you.

Change your class to extend AppCompatActivity instead of Activity.

Android displaying pop-up message or animation on button click

I am really new to android programming, and I'm stuck with a really small problem in my app. The (very simple) app is almost ready, its just that there is a button and when it is clicked, I want the user to get a response in the form of either a message or some animation so that the user can feel that the app has registered the button click. I've been looking up and trying stackoverflow and other tutorials but to no avail. I just want some kind of a response when the button is clicked, so that the user doesn't feel confused about whether the app is working or not. Any help will be greatly appreciated!! Here's the code below:-
The XML file:-
<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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MyActivity"
android:background="#d1000000">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click Me"
android:id="#+id/Hinglishbutton"
android:background="#cfa16cff"
android:hapticFeedbackEnabled="true"
android:onClick="buttonHandler"
android:clickable="true"
android:textColor="#a5fafbf9"
tools:ignore="HardcodedText"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="71dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Welcome to Hinglish :)"
android:id="#+id/textView4"
android:textColor="#a5fafbf9"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="62dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hinglish lets you add Hindi words to your predictive dictionary thus enabling a richer typing experience!"
android:id="#+id/textView"
android:textColor="#a5fafbf9"
android:textIsSelectable="false"
android:textSize="14sp"
android:typeface="sans"
android:layout_marginTop="80dp"
android:layout_below="#+id/textView4"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click the button once, minimize Hinglish and go grab a coffee. You will now be able to type hindi words without autocorrect converting them to junk english!"
android:id="#+id/textView2"
android:textColor="#a5fafbf9"
android:textIsSelectable="false"
android:textSize="14sp"
android:typeface="sans"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Hosting this app costs money! To pitch in, contact the developer at spandan.madan#gmail.com :) :)"
android:id="#+id/textView5"
android:textColor="#a5fafbf9"
android:layout_below="#+id/textView2"
android:layout_alignRight="#+id/textView2"
android:layout_alignEnd="#+id/textView2"
android:layout_marginTop="43dp" />
</RelativeLayout>
The myActivity.java file:-
package com.example.spandanmadan1.hinglish;
import android.content.res.AssetManager;
import android.provider.UserDictionary;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class MyActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
Button bsubmit = (Button) findViewById(R.id.Hinglishbutton);
bsubmit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(getApplicationContext(), "Thank you for using Hinglish", Toast.LENGTH_LONG).show();
InputStream fis = getResources().openRawResource(R.raw.hindislang);
BufferedReader bfr = null;
try {
bfr = new BufferedReader(new InputStreamReader(fis));
String line = null;
while ((line = bfr.readLine()) != null) {
UserDictionary.Words.addWord(getApplicationContext(), line, 1, "", null);
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_my, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

I created a new project, used your xml and in the buttonHandler function I gave the toast as follows:
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
public class MyActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
}
public void buttonHandler(View view) {
Toast.makeText(getApplicationContext(), "Thank you for using Hinglish", Toast.LENGTH_LONG).show();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_my, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
This works. The Toast : "Thank you for using Hinglish" was displayed on screen.

You can use a Toast:
Toast.makeText(getApplicationContext(),"<Your message to the User>",Toast.LENGTH_SHORT).show();
The message will be shown when you click the button.

I need to create three buttons and each button shows different text

I need to create three buttons in Android Studio and each button shows different text. When the user clicks on first button it shows "Welcome" at the right side of the button. When the user click on the second button the "Welcome" message will disappear, and in the same place a"Hello" message will appear. Third button is the same with difference message"Bye". Here my code and thanks in advance.
XML Code:
<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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.example.android.Recipes">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="R1"
android:id="#+id/click_btn"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/response"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/click_btn"
android:layout_toEndOf="#+id/click_btn" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="R2"
android:id="#+id/button15"
android:layout_below="#+id/click_btn"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="34dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="R3"
android:id="#+id/button16"
android:layout_centerVertical="true"
android:layout_alignRight="#+id/button15"
android:layout_alignEnd="#+id/button15" />
Java Code:
package com.example.android;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import static com.example.android.R.*;
public class Recipes extends ActionBarActivity implements View.OnClickListener {
TextView resp;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(layout.activity_recipes);
resp = (TextView)this.findViewById(id.response);
Button b = (Button)this.findViewById(id.click_btn);
b.setOnClickListener(this);
resp.setText("Welcome ");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_recipes, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onClick(View v) {
resp.setText("Welcome ");
}
}

Set setOnClickListener for all Button's in same way as currently doing for click_btn Button .
To change text of TextView clicked use switch-case inside onClick method like:
#Override
public void onClick(View v) {
switch(v.getId()){
case R.id.click_btn: /** on click_btn button click */
resp.setText("Welcome ");
break;
case R.id.button15: /** on button15 button click */
resp.setText("Hello ");
break;
case R.id.button16: /** on button16 button click */
resp.setText("Bye ");
break;
}
}

How to solve inconvertable types cannot cast "Android.support.v4.app.fragment" to "packagename"

I am creating an android application that consists of navigation drawer in android studio.
I am getting an error called inconvertable types cannot cast "How to solve inconvertable types cannot cast "Android.support.v4.app.fragment" to "packagename"" please helpme howto solve this.
This is my activity_main.java
package sample.lakshman.com.sampleltester;
import android.content.Intent;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v7.widget.Toolbar;
import sample.lakshman.com.sampleltester.Fragment_navigation;
public class MainActivity extends ActionBarActivity {
public Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
Fragment_navigation drawer_navigation = (Fragment_navigation)getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawer_navigation.setUp((DrawerLayout)findViewById(R.id.drawer_layout),toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if(id==R.id.navigation_item)
{
Intent sub = new Intent(MainActivity.this,Subactivity.class);
startActivity(sub);
}
return super.onOptionsItemSelected(item);
}
}
This is my main_activity.xml
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<include
android:id="#+id/tool_bar"
layout="#layout/tool_bar" />
</RelativeLayout>
<fragment
android:id="#+id/fragment_navigation_drawer"
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_fragment_navigation"
android:name="sample.lakshman.com.sampleltester.Fragment_navigation"
tools:layout="#layout/fragment_fragment_navigation" />
</android.support.v4.widget.DrawerLayout>

Just go to your Fragment_navigation class and
replace
import android.app.Fragment;
with
import android.support.v4.app.Fragment;

ActionButton/ActionBar does not showup in TabHost method

I'm trying to have a different action bar for each new tab (activity) in my project
I have created my first Activity and put it as a tab in my Main Activity
my first activity (tab) has the action button ( Start ) in the action bar of its activity
somehow nothing show up in the action bar for this tab
and if so I would to put more activities (tabs) no action bar/buttons will be shown
there is no error in my logcat
this is my code :
AndroidTabLayoutActivity.java
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;
public class AndroidTabLayoutActivity extends TabActivity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TabHost tabHost = getTabHost();
// Tab for activity1
TabSpec activity1 = tabHost.newTabSpec("Photos");
activity1.setIndicator("Photos", getResources().getDrawable(R.drawable.icon_photos_tab));
Intent photosIntent = new Intent(this, OneActivity.class);
activity1.setContent(photosIntent);
tabHost.addTab(activity1); // Adding photos tab
}
}
OneActivity.java
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
public class OneActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.photos_layout);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity1_actions, menu);
return super.onCreateOptionsMenu(menu);
}
public boolean onOptionsItemSelected(MenuItem item) {
// Take appropriate action for each action item click
switch (item.getItemId()) {
case R.id.action_start:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:tools="http://schemas.android.com/tools"
tools:context="b3du.im.tabLayout.AndroidTabLayoutActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
</TabHost>
photos_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Screen Design for Activity1 -->
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="im the first one "
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
activity1_actions.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- Exit -->
<item android:id="#+id/action_start"
android:title="Start"
android:showAsAction="withText|always" />
</menu>

you need to add the Action buttons in the main activity (where the tabs are hosted) NOT in the tab activiy.
And later manage them in the tab activity by using
getParent().getActionBar()
and also..
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getParent().getMenuInflater().inflate(R.menu.home_tabs, menu);
//getMenuInflater().inflate(R.menu.home_tabs, menu);
return true;
}