package info.metadude.android.typedpreferences.demo; import android.os.Bundle; import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.text.Editable; import android.text.TextUtils; import android.widget.EditText; import android.widget.TextView; import butterknife.BindView; import butterknife.ButterKnife; import butterknife.OnClick; public class MainActivity extends AppCompatActivity { @BindView(R.id.storage_current_value) TextView storageValueTextView; @BindView(R.id.user_input) EditText userInputEditText; private PreferenceHelper mPreferenceHelper; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); ActionBar actionBar = getSupportActionBar(); if (actionBar != null) { actionBar.setDisplayShowHomeEnabled(true); actionBar.setIcon(R.drawable.ic_launcher); } mPreferenceHelper = ((DemoApplication) getApplication()) .getPreferenceHelper(); } @Override protected void onResume() { super.onResume(); restorePreferences(); } @Override protected void onPause() { storePreferences(); super.onPause(); } @OnClick(R.id.submit_user_input) public void onUserInputSubmit() { Editable userInput = userInputEditText.getText(); if (!TextUtils.isEmpty(userInput)) { String text = userInput.toString(); storageValueTextView.setText(text); } } private void restorePreferences() { if (mPreferenceHelper.storesUserInput()) { storageValueTextView.setText(mPreferenceHelper.restoreUserInput()); } } private void storePreferences() { mPreferenceHelper.storeUserInput(storageValueTextView.getText().toString()); } }