How to create basic animations in android : In this blog i will show you how to create simple shake animation in android.First create a anim folder in res/anim in the android project. Create a xml file in it sopy the following code in it

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500"
    android:fromXDelta="0"
    android:interpolator="@anim/cycle&#95;7"
    android:toXDelta="10" />

Create another xml file in android cycle_7.xml copy the following code:

<cycleInterpolator xmlns:android="http://schemas.android.com/apk/res/android"
    android:cycles="7" />

Then in the activity in which you want to show the animation copy the following code:

import java.util.ArrayList;



import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;
public class LoginActivity extends Activity implements AnimationListener {
    Animation anim;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);

        // Edit Text for username and password
        final EditText txtUserName = (EditText) findViewById(R.id.txtUsername);
        final EditText txtPassword = (EditText) findViewById(R.id.txtPassword);

        // set animation
        // to change animation change R.anim.bounce to R.anim.shake
        anim = AnimationUtils.loadAnimation(getApplicationContext(),
                R.anim.bounce);

        // login button
        Button btnLogin = (Button) findViewById(R.id.btnLogin);
        btnLogin.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                String username = txtUserName.getText().toString();
                String password = txtPassword.getText().toString();
                try {
                    if (username.equals("")) {
                        txtUserName.setError("Username is required");
                        txtUserName.startAnimation(anim);
                    }
                    if (password.equals("")) {
                        txtPassword.setError("Password is required");
                        txtPassword.startAnimation(anim);
                    }
                    if (password.length() < 6) {
                        txtPassword
                                .setError("Password must be 6 character long");
                        txtPassword.startAnimation(anim);

                    }

                } catch (Exception e) {
                    Toast.makeText(LoginActivity.this, e.getMessage(),
                            Toast.LENGTH&#95;LONG).show();
                }
                LoginASYNC login = new LoginASYNC();
                login.execute(new String[] { ServerUrl.BASE&#95;URL });
            }

        });
txtUserName.setOnEditorActionListener(new OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId,
                    KeyEvent event) {
                boolean handled = false;
                if (actionId == EditorInfo.IME&#95;ACTION&#95;SEND) {
                    // do the login
                    System.out.println("send uiser");
                    Toast.makeText(LoginActivity.this, "login clicked",
                            Toast.LENGTH&#95;LONG).show();
                    handled = true;
                }
                return handled;
            }
        });

        txtPassword.setOnEditorActionListener(new OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId,
                    KeyEvent event) {
                boolean handled = false;
                if (actionId == EditorInfo.IME&#95;ACTION&#95;SEND) {
                    // do the login
                    System.out.println("send pass ");
                    Toast.makeText(LoginActivity.this, "login clicked",
                            Toast.LENGTH&#95;LONG).show();
                    handled = true;
                }
                return handled;
            }
        });

        TextView forget = (TextView) findViewById(R.id.forget&#95;password);
        forget.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                startActivity(new Intent(LoginActivity.this,
                        Forget&#95;Password.class));
            }
        });
    }

    @Override
    public void onAnimationEnd(Animation animation) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onAnimationRepeat(Animation animation) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onAnimationStart(Animation animation) {
        // TODO Auto-generated method stub

    }
}

Hope the code helps.