Android Tutorials for Beginners: August 2013

Saturday, August 24, 2013

Android RatingBar Example

A Rating Bar is used to show rating in Stars.The user can touch/drag or use arrow keys to set the rating when using the default size RatingBar.

RatingBar Example.

main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:background="#C2C2A3">

<RatingBar

android:id="@+id/ratingBar1"

android:layout_marginTop="50dp"

android:layout_gravity="center_horizontal"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />

<Button

android:id="@+id/button1"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginTop="50dp"

android:text="OK" />

</LinearLayout>

How to change the Number of Stars

Use android:numStars attribute to set the number of stars you want.

MainActivity.java

public class MainActivity extends Activity

{

RatingBar ratingBar;

Button btn;

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ratingBar=(RatingBar)findViewById(R.id.ratingBar1);

btn=(Button)findViewById(R.id.button1);

// Set ChangeListener to Rating Bar

ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {

public void onRatingChanged(RatingBar ratingBar, float rating,

boolean fromUser) {

Toast.makeText(getApplicationContext(),"Your Selected Ratings : " + String.valueOf(rating),Toast.LENGTH_LONG).show();

}

});

btn.setOnClickListener(new View.OnClickListener() {

public void onClick(View arg0) {

// TODO Auto-generated method stub

float rating=ratingBar.getRating();

Toast.makeText(getApplicationContext(),"Your Selected Ratings : " + String.valueOf(rating),Toast.LENGTH_LONG).show();

}

});

}

How to Set The Rating at Run time
use method

ratingBar.setRating(4); or pass any number like 3.5, 4.5 etc.

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Beginning With Android
Android : Introduction(What is Android)                                                Configuring Eclipse for Android Development
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Advance Android Topics                                                            Customizing Android Views

Customizing Toast In Android Customizing Radio Buttons

Showing Toast for Longer Time Customizing Checkboxes In Android

Customizing the Display Time of Toast Customizing ProgressBar

Using TimePickerDialog and DatePickerDialog In android Customizing Toast In Android

Animating A Button In Android

Populating ListView With DataBase Android Animation

Increasin Size of Checkboxes Using Android ImageSwitcher

Android ProgressBar Using Android TextSwitcher

Designing For Different Screen Sizes GridView Animation

Handling Keyboard Events Animating A Button In Android

Alarm Manager
Android AlarmManger
Scheduling Task Using AlarmManger

Working With Layouts                                                                Working With Views

Understanding Layouts in Android                                                   Using Buttons and EditText in Android
Working with Linear Layout (With Example)                                     Using CheckBoxes in Android
Nested Linear Layout (With Example)                                              Using AutoCompleteTextView in Android                                                                                          Grid View
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Returning Result from Activity                                               Creating Dialog To Collect User Input
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BroadcastReceiver                                                                   Using TimePickerDialog and DatePickerDialog In android

Menus In Android                                                                ListView:
Creating Option Menu                                 Populating ListView With DataBase
Creating Context Menu In Android            Populating ListView with ArrayList
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Toast                                                                                      Working With SMS
Customizing Toast In Android                                               How to Send SMS in Android
Customizing the Display Time of Toast                                  How To Receive SMS
Customizing Toast At Runtime                                                Accessing Inbox In Android
Adding Image in Toast
Showing Toast for Longer Time

TelephonyManager                                                            Storage: Storing Data In Android
Using Telephony Manager In Android                                SharedPreferences In Android
                                                                                              Reading and Writing files to Internal Stoarage

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How To Handle Incoming Calls in Android                          Working With Database in Android
How to Forward an Incoming Call In Android                            Creating Table In Android
CALL States In Android                                                          Inserting, Deleting and Updating Records In Table in Android

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Opening a webpage In Browser
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Prompt User Input with an AlertDialog
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How to show an Activity in Landscape or Portrait Mode only.
How to Set an Image as Wallpaper.

Android Custom Adapter Example

The Android Development Tutorials blog contains Basic as well as Advanced android tutorials.Go to Android Development Tutorials to get list of all Android Topics.

Populate ListView with Custom Adapter

ListView can be populated by ArrayAdapter, Database, ArrayList etc
In this post I will describe how to populate ListView using a Custom Adapter.

Have a look at my previous post
Populating ListView with Database
Populating ListView with ArrayList

ListView with Custom Adapter Example

In this example I have created a listView and populated it with Custom Adapter.
Each of the ListView item contain two views
TextView SMS Sender : to show SMS Sender Number
TextView SMSBody : to show the SMS Body/content

Here the ListView shows the all the SMSes with Sender Number and SMSBody.

What we need to do ..
Create a Custom Adapter
and add/set the adapter to ListView.

Add the following permission in your manifest file to read the SMS..
<uses-permission android:name="android.permission.READ_SMS"/>
<uses-permission android:name="android.permission.WRITE_SMS"/>

listview_activity_main.xml

listview_each_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textViewSMSSender"
        android:paddingLeft="2dp"
        android:textSize="20dp"
        android:textStyle="bold"
        android:textColor="#0000FF"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />

    <TextView
        android:id="@+id/textViewMessageBody"
        android:paddingLeft="5dp"
        android:textColor="#5C002E"
        android:textSize="17dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />

</LinearLayout>

</LinearLayout>

ListViewMainActivity.java

public class ListViewMainActivity extends Activity
{
            ListView listViewSMS;
            Cursor cursor;
            SMSListAdapter smsListAdapter;
            Context context;
            @Override
            protected void onCreate(Bundle savedInstanceState)
            {
                    super.onCreate(savedInstanceState);
                    setContentView(R.layout.listview_activity_main);

                    context=this;
                    listViewSMS=(ListView)findViewById(R.id.listViewSMS);

                    cursor = getContentResolver().query(Uri.parse("content://sms/inbox"), null, null, null, null);

                    // Create the Adapter
                    smsListAdapter=new SMSListAdapter(this,cursor);

                    // Set The Adapter to ListView
                    listViewSMS.setAdapter(smsListAdapter);

                    // to handle click event on listView item
                    listViewSMS.setOnItemClickListener(new OnItemClickListener()
                    {
                            public void onItemClick(AdapterView<?> arg0, View v,int position, long arg3)
                            {
                                // when user clicks on ListView Item , onItemClick is called
                                // with position and View of the item which is clicked
                                // we can use the position parameter to get index of clicked item
                                TextView textViewSMSSender=(TextView)v.findViewById(R.id.textViewSMSSender);
                                TextView textViewSMSBody=(TextView)v.findViewById(R.id.textViewMessageBody);
                                String smsSender=textViewSMSSender.getText().toString();
                                String smsBody=textViewSMSBody.getText().toString();

                                // Show The Dialog with Selected SMS
                                AlertDialog dialog = new AlertDialog.Builder(context).create();
                                dialog.setTitle("SMS From : "+smsSender);
                                dialog.setIcon(android.R.drawable.ic_dialog_info);
                                dialog.setMessage(smsBody);
                                dialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK",
                                        new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog, int which)
                                    {

                                            dialog.dismiss();
                                            return;
                                }
                                });
                                dialog.show();
                            }
                        });

            }
}

SMSListAdapter.java : The Custom Adapter

public class SMSListAdapter extends BaseAdapter
{

    private Context mContext;
    Cursor cursor;
    public SMSListAdapter(Context context,Cursor cur)
    {
            super();
            mContext=context;
            cursor=cur;

    }

    public int getCount()
    {
        // return the number of records in cursor
        return cursor.getCount();
    }

    // getView method is called for each item of ListView
    public View getView(int position, View view, ViewGroup parent)
    {
                    // inflate the layout for each item of listView
                    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    view = inflater.inflate(R.layout.listview_each_item, null);

                    // move the cursor to required position
                    cursor.moveToPosition(position);

                    // fetch the sender number and sms body from cursor
                    String senderNumber=cursor.getString(cursor.getColumnIndex("address"));
                    String smsBody=cursor.getString(cursor.getColumnIndex("body"));

                    // get the reference of textViews
                    TextView textViewConatctNumber=(TextView)view.findViewById(R.id.textViewSMSSender);
                    TextView textViewSMSBody=(TextView)view.findViewById(R.id.textViewMessageBody);

                    // Set the Sender number and smsBody to respective TextViews
                    textViewConatctNumber.setText(senderNumber);
                    textViewSMSBody.setText(smsBody);


                    return view;
    }

    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }
}

Customizing Toast In Android Customizing Radio Buttons

Showing Toast for Longer Time Customizing Checkboxes In Android

Customizing the Display Time of Toast Customizing ProgressBar

Using TimePickerDialog and DatePickerDialog In android Customizing Toast In Android

Animating A Button In Android

Populating ListView With DataBase Android Animation

Increasin Size of Checkboxes Using Android ImageSwitcher

Android ProgressBar Using Android TextSwitcher

Designing For Different Screen Sizes GridView Animation

Handling Keyboard Events Animating A Button In Android

Alarm Manager
Android AlarmManger
Scheduling Task Using AlarmManger

List of Android Permissions With Example

Call Related Permissions

<uses-permission android:name="android.permission.CALL_PHONE" />
Allows an application to initiate a phone call without going through the Dialer user interface for the user to confirm the call being placed.

<uses-permission android:name="android.permission.CALL_PRIVILEGED" />
Allows an application to call any phone number, including emergency numbers, without going through the Dialer user interface for the user to confirm the call being placed.

<uses-permission android:name="com.android.voicemail.permission.ADD_VOICEMAIL" />
Allows an application to add voicemails into the system.

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
Allows read only access to phone state. You can get states like "Phone Ringing", "Call Received" etc using this permission.

Follow the post for running Example of this Permission

<uses-permission android:name="android.permission.READ_CALL_LOG" />
Allows an application to read the user's call log . You can get the information like phone number, name, call duration, call type(incoming, outgoing, missed call) etc

SMS/MMS related permissions

<uses-permission android:name="android.permission.RECEIVE_MMS" />
Allows an application to monitor incoming MMS messages, to record or perform processing on them.

<uses-permission android:name="android.permission.RECEIVE_SMS" />
This permission allows an application to Receive the SMS

Follow the post for running Example of RECEIVE_SMS Permission

<uses-permission android:name="android.permission.READ_SMS" />
This permission allows you read the SMS ,and get SMS Sender's number SMS Body, Sent time etc.

Follow the post for running Example of READ_SMS Permission

<uses-permission android:name="android.permission.SEND_SMS" />
This permission allows an application to Recive the SMS

Follow the post for running Example of SEND_SMS Permission

Network/Internet/Location related permission

<uses-permission android:name="android.permission.INTERNET" />
Allows applications to open network sockets.With this permission your application can use 2G/3G internet .

Follow the post for running Example of INTERNET Permission

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
Allows an app to access approximate location derived from network location sources such as cell towers and Wi-Fi.

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
Allows an app to access precise location from location sources such as GPS,
cell towers, and Wi-Fi.

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
Allows applications to access information about networks

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
Allows applications to access information about Wi-Fi networks

Media Related Permissions

<uses-permission android:name="android.permission.CAMERA" />
Required to be able to access the camera device

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
Allows an application to modify global audio settings

<uses-permission android:name="android.permission.RECORD_AUDIO" />
this permision allows you to record some audio or sound

Phonebook Related Permissions:

<uses-permission android:name="android.permission.READ_CONTACTS" />
Allows an application to read the user's contacts data.You can get Name, Number, etc of a Saved Contact

Follow the post for running Example of this Permission

<uses-permission android:name="android.permission.WRITE_CONTACTS" />
Allows an application to add a new Contact in Phonebook

<uses-permission android:name="android.permission.READ_PROFILE" />
Allows an application to read the user's personal profile data.

SD Card related Permissions

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Allows an application to read from external storage/SD card.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Allows an application to write to external storage

Follow the post for running Example of this Permission

Other Important Manifest Permissions

<uses-permission android:name="android.permission.BATTERY_STATS" />
Allows an application to collect battery statistics

<uses-permission android:name="android.permission.BLUETOOTH" />
Allows applications to connect to paired bluetooth devices

<uses-permission android:name="android.permission.READ_CALENDAR" />
Allows an application to read the user's calendar data.

<uses-permission android:name="com.android.browser.permission.READ_HISTORY_BOOKMARKS" />
Allows an application to read (but not write) the user's browsing history and bookmarks

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
Allows an application to receive Boot_Completed broadcast

Follow the post for running Example of this Permission

<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />
Allows an application to broadcast an Intent to set an alarm for the user.

Follow the post for running Example of this SET_ALARM Permission

<uses-permission android:name="android.permission.SET_WALLPAPER" />
Allows an Application to set the Wallpaper
Running Example : How to Set an Image as Wallpaper.

<uses-permission android:name="android.permission.VIBRATE" />
Allows an application to Vibrate the phone

Follow the post for running Example of VIBRATE Permission

10 Tips to Increase Windows 10 Performnace

Saturday, August 24, 2013

Android RatingBar Example

RatingBar Example.

main.xml

MainActivity.java

Android Custom Adapter Example

Populate ListView with Custom Adapter

ListView with Custom Adapter Example

listview_activity_main.xml

listview_each_item.xml

ListViewMainActivity.java

SMSListAdapter.java : The Custom Adapter

List of Android Permissions With Example

Call Related Permissions

SMS/MMS related permissions

Network/Internet/Location related permission

Media Related Permissions

Phonebook Related Permissions:

SD Card related Permissions

Other Important Manifest Permissions