ANDROID APP

import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
Shared Preferences
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public class DataStorage extends Activity {
SharedPreferences myprefs;
EditText userET, passwordET;
Button loginBT;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myprefs = PreferenceManager.getDefaultSharedPreferences(this);
final String username = myprefs.getString("username", null);
final String password = myprefs.getString("password", null);
if (username != null && password != null){
setContentView(R.layout.main);
userET = (EditText)findViewById(R.id.userText);
passwordET = (EditText)findViewById(R.id.passwordText);
loginBT = (Button)findViewById(R.id.loginButton);
loginBT.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
if(username.equals(userET.getText().toString())
&& password.equals(
passwordET.getText().toString())) {
Toast.makeText(DataStorage.this,
"login passed!!",
Toast.LENGTH_SHORT).show();
Intent i = new Intent(DataStorage.this,
myPreferences.class);
startActivity(i);
} else {
Toast.makeText(DataStorage.this,
"login failed!!",
Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
} else {
Intent i = new Intent(this, MyPreferences.class);
startActivity(i);
}
}
}