Android – Show error in EditText
-
Paresh Mayani
- September 7, 2011
- 1 min read
- 6 Comments
Problem: How to show error/alert for some cases in EditText?
Description:
Consider a case that we are supposed to collect information from users by filling EditText box and user leaves EditText blank, at that we display alert/error message “Please enter string”. But here is a best way to display alert/error message in EditText for the same case and also for other case.
Solution:
We can display error message in EditText by using setError() method.
Main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/linearLayout1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_margin="5dp"> <EditText android:layout_height="wrap_content" android:id="@+id/editText1" android:layout_width="fill_parent"> </EditText> <Button android:layout_height="wrap_content" android:id="@+id/button1" android:text="Check" android:layout_width="wrap_content" android:onClick="btnClick"> </Button> </LinearLayout>
MainActivity.java
package com.paresh.edittextseterror;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
EditText editText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
editText = (EditText) findViewById(R.id.editText1);
}
public void btnClick(View v)
{
if(editText.getText().length()==0)
{
editText.setError("Field cannot be left blank.");
}
}
}
Download this example: Android – Show error in EditText
