SetError Example In Android

res/layout/seterror.xml

Step 1: seterror.xml :



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textViewPhoneNo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="To"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <EditText
        android:id="@+id/editTextTo"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        >

        <requestFocus />
    </EditText>

    <TextView
        android:id="@+id/textViewSubject"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Subject"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <EditText
        android:id="@+id/editTextSubject"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
    </EditText>

    <TextView
        android:id="@+id/textViewMessage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Message"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <EditText
        android:id="@+id/editTextMessage"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="top"
        android:inputType="textMultiLine"
        android:lines="5" />

    <Button
        android:id="@+id/buttonSend"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Send" />
</LinearLayout>



Step 2: SetError.java :



public class SetError extends Activity implements OnClickListener{


Button buttonSend;
    

EditText txtTo;

    

EditText txtSubject;

    

EditText txtMessage;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.contactus);
 
buttonSend = (Button) findViewById(R.id.buttonSend);

txtTo = (EditText) findViewById(R.id.editTextTo);

txtSubject = (EditText) findViewById(R.id.editTextSubject);

txtMessage = (EditText) findViewById(R.id.editTextMessage);
        

buttonSend.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {


String to = txtTo.getText().toString();
                 

String subject = txtSubject.getText().toString();

             

String message = txtMessage.getText().toString();

                  

if (to.equals("")) {

txtTo.setError("You forgot to enter the To");

}

else if (subject.equals("")){

 txtTo.setError(null);

                

                txtSubject.setError("You forgot to enter the Subject");

                

}

else if (message.equals("")) {

txtSubject.setError(null);
                

               txtMessage.setError("You forgot to enter the Message");

}

 else{


Toast.makeText(getApplicationContext(),"

Message Send Succusefully",

Toast.LENGTH_SHORT).show();

}
}

});
}


@Override
public void onClick(View v) {
// TODO Auto-generated method stub

}



}

Screen Shot:

Source Code :  Click to Download Source Code

    Happy Programming ....

Cheers