Android RatingBar Example

Android RatingBar can be used to get the rating from the user. The Rating returns a floating-point number. It may be 2.0, 3.5, 4.0 etc.

Android RatingBar displays the rating in stars. Android RatingBar is the subclass of AbsSeekBar class.

The getRating() method of android RatingBar class returns the rating number.

Android RatingBar Example

Let's see the simple example of rating bar in android.

activity_main.xml

Drag the RatingBar and Button from the pallete, now the activity_main.xml file will like this:

File: activity_main.xml

1. <RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"  
2.     xmlns:tools="http://schemas.android.com/tools"  
3.     android:layout_width="match_parent"  
4.     android:layout_height="match_parent"  
5.     tools:context=".MainActivity" >  
6.   
7.     <RatingBar  
8.         android:id="@+id/ratingBar1"  
9.         android:layout_width="wrap_content"  
10.         android:layout_height="wrap_content"  
11.         android:layout_alignParentTop="true"  
12.         android:layout_centerHorizontal="true"  
13.         android:layout_marginTop="44dp" />  
14.   
15.     <Button  
16.         android:id="@+id/button1"  
17.         android:layout_width="wrap_content"  
18.         android:layout_height="wrap_content"  
19.         android:layout_alignLeft="@+id/ratingBar1"  
20.         android:layout_below="@+id/ratingBar1"  
21.         android:layout_marginLeft="92dp"  
22.         android:layout_marginTop="66dp"  
23.         android:text="submit" />  
24.   
25. </RelativeLayout>  

---

Activity class

Let's write the code to display the rating of the user.

File: MainActivity.java

1. package com.example.rating;  
2.   
3. import android.os.Bundle;  
4. import android.app.Activity;  
5. import android.view.Menu;  
6. import android.view.View;  
7. import android.view.View.OnClickListener;  
8. import android.widget.Button;  
9. import android.widget.RatingBar;  
10. import android.widget.Toast;  
11.   
12. public class MainActivity extends Activity {  
13.     RatingBar ratingbar1;  
14.     Button button;  
15.     @Override  
16.     protected void onCreate(Bundle savedInstanceState) {  
17.         super.onCreate(savedInstanceState);  
18.         setContentView(R.layout.activity_main);  
19.         addListenerOnButtonClick();  
20.     }  
21.   
22.     public void addListenerOnButtonClick(){  
23.         ratingbar1=(RatingBar)findViewById(R.id.ratingBar1);  
24.         button=(Button)findViewById(R.id.button1);  
25.         //Performing action on Button Click  
26.         button.setOnClickListener(new OnClickListener(){  
27.   
28.             @Override  
29.             public void onClick(View arg0) {  
30.                 //Getting the rating and displaying it on the toast  
31.                 String rating=String.valueOf(ratingbar1.getRating());  
32.                 Toast.makeText(getApplicationContext(), rating, Toast.LENGTH_LONG).show();  
33.             }  
34.               
35.         });  
36.     }  
37.     @Override  
38.     public boolean onCreateOptionsMenu(Menu menu) {  
39.         // Inflate the menu; this adds items to the action bar if it is present.  
40.         getMenuInflater().inflate(R.menu.activity_main, menu);  
41.         return true;  
42.     }  
43.   
44. }  

---

Output:

 

Android AutoCompleteTextView Example

Android AutoCompleteTextView completes the word based on the reserved words, so no need to write all the characters of the word.

Android AutoCompleteTextView is a editable text field, it displays a list of suggestions in a drop down menu from which user can select only one suggestion or value.

Android AutoCompleteTextView is the subclass of EditText class. The MultiAutoCompleteTextView is the subclass of AutoCompleteTextView class.

Android AutoCompleteTextView Example

In this example, we are displaying the programming languages in the autocompletetextview. All the programming languages are stored in string array. We are using the ArrayAdapter class to display the array content.

Let's see the simple example of autocompletetextview in android.

activity_main.xml

Drag the AutoCompleteTextView and TextView from the pallete, now the activity_main.xml file will like this:

File: activity_main.xml

1. <RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"  
2.     xmlns:tools="http://schemas.android.com/tools"  
3.     android:layout_width="match_parent"  
4.     android:layout_height="match_parent"  
5.     tools:context=".MainActivity" >  
6.   
7.     <TextView  
8.         android:id="@+id/textView1"  
9.         android:layout_width="wrap_content"  
10.         android:layout_height="wrap_content"  
11.         android:layout_alignParentLeft="true"  
12.         android:layout_alignParentTop="true"  
13.         android:layout_marginTop="15dp"  
14.         android:text="@string/what_is_your_favourite_programming_language_" />  
15.   
16.     <AutoCompleteTextView  
17.         android:id="@+id/autoCompleteTextView1"  
18.         android:layout_width="wrap_content"  
19.         android:layout_height="wrap_content"  
20.         android:layout_alignParentLeft="true"  
21.         android:layout_below="@+id/textView1"  
22.         android:layout_marginLeft="36dp"  
23.         android:layout_marginTop="17dp"  
24.         android:ems="10"  
25.         android:text="">  
26.    
27.     </AutoCompleteTextView>  
28.       
29. </RelativeLayout>  

---

Activity class

Let's write the code of AutoCompleteTextView.

File: MainActivity.java

1. package com.example.autocompletetextview;  
2.   
3. import android.os.Bundle;  
4. import android.app.Activity;  
5. import android.graphics.Color;  
6. import android.view.Menu;  
7. import android.widget.ArrayAdapter;  
8. import android.widget.AutoCompleteTextView;  
9.   
10. public class MainActivity extends Activity {  
11.     String[] language ={"C","C++","Java",".NET","iPhone","Android","ASP.NET","PHP"};  
12.     @Override  
13.     protected void onCreate(Bundle savedInstanceState) {  
14.         super.onCreate(savedInstanceState);  
15.         setContentView(R.layout.activity_main);  
16.           
17.         //Creating the instance of ArrayAdapter containing list of language names  
18.            ArrayAdapter<String> adapter = new ArrayAdapter<String>  
19.             (this,android.R.layout.select_dialog_item,language);  
20.         //Getting the instance of AutoCompleteTextView  
21.            AutoCompleteTextView actv= (AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);  
22.            actv.setThreshold(1);//will start working from first character  
23.            actv.setAdapter(adapter);//setting the adapter data into the AutoCompleteTextView  
24.            actv.setTextColor(Color.RED);  
25.                           
26.     }  
27.   
28.     @Override  
29.     public boolean onCreateOptionsMenu(Menu menu) {  
30.         // Inflate the menu; this adds items to the action bar if it is present.  
31.         getMenuInflater().inflate(R.menu.activity_main, menu);  
32.         return true;  
33.     }  
34.   
35. }  

---

Output:

 

Android Spinner Example

Android Spinner is like the combox box of AWT or Swing. It can be used to display the multiple options to the user in which only one item can be selected by the user.

Android spinner is like the drop down menu with multiple values from which the end user can select only one value.

Android spinner is associated with AdapterView. So you need to use one of the adapter classes with spinner.

Android Spinner class is the subclass of AsbSpinner class.

Android Spinner Example

In this example, we are going to display the country list. You need to use ArrayAdapter class to store the country list.

Let's see the simple example of spinner in android.

activity_main.xml

Drag the Spinner from the pallete, now the activity_main.xml file will like this:

File: activity_main.xml

1. <RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"  
2.     xmlns:tools="http://schemas.android.com/tools"  
3.     android:layout_width="match_parent"  
4.     android:layout_height="match_parent"  
5.     tools:context=".MainActivity" >  
6.   
7.     <Spinner  
8.         android:id="@+id/spinner1"  
9.         android:layout_width="wrap_content"  
10.         android:layout_height="wrap_content"  
11.         android:layout_alignParentTop="true"  
12.         android:layout_centerHorizontal="true"  
13.         android:layout_marginTop="83dp" />  
14.   
15. </RelativeLayout>  

---

Activity class

Let's write the code to display item on the spinner and perform event handling.

File: MainActivity.java

1. package com.example.spinner;  
2. import android.app.Activity;  
3. import android.os.Bundle;  
4. import android.view.Menu;  
5. import android.view.View;  
6. import android.widget.AdapterView;  
7. import android.widget.ArrayAdapter;  
8. import android.widget.Spinner;  
9. import android.widget.TextView;  
10. import android.widget.Toast;  
11.   
12. public class MainActivity extends Activity implements  
13. AdapterView.OnItemSelectedListener {  
14.   
15.     String[] country = { "India", "USA", "China", "Japan", "Other",  };  
16.   
17.     @Override  
18.     protected void onCreate(Bundle savedInstanceState) {  
19.         super.onCreate(savedInstanceState);  
20.         setContentView(R.layout.activity_main);  
21.         //Getting the instance of Spinner and applying OnItemSelectedListener on it  
22.         Spinner spin = (Spinner) findViewById(R.id.spinner1);  
23.         spin.setOnItemSelectedListener(this);  
24.           
25.         //Creating the ArrayAdapter instance having the country list  
26.         ArrayAdapter aa = new ArrayAdapter(this,android.R.layout.simple_spinner_item,country);  
27.         aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);  
28.         //Setting the ArrayAdapter data on the Spinner  
29.         spin.setAdapter(aa);  
30.     }  
31.   
32.       
33.     //Performing action onItemSelected and onNothing selected  
34.     @Override  
35.     public void onItemSelected(AdapterView<?> arg0, View arg1, int position,long id) {  
36.         Toast.makeText(getApplicationContext(),country[position] ,Toast.LENGTH_LONG).show();  
37.     }  
38.   
39.     @Override  
40.     public void onNothingSelected(AdapterView<?> arg0) {  
41.         // TODO Auto-generated method stub  
42.           
43.     }  
44.   
45.     @Override  
46.     public boolean onCreateOptionsMenu(Menu menu) {  
47.         // Inflate the menu; this adds items to the action bar if it is present.  
48.         getMenuInflater().inflate(R.menu.activity_main, menu);  
49.         return true;  
50.     }  
51. }  

---

Output: