Landing page layout design:
<LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:orientation="horizontal" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/account" /> <EditText android:id="@+id/edtaccount" android:layout_width="150dp" android:layout_height="wrap_content" android:inputType="number" android:singleLine="true" /> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:orientation="horizontal" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/password" /> <EditText android:id="@+id/edtpassword" android:layout_width="150dp" android:layout_height="wrap_content" android:inputType="textPassword" android:singleLine="true" /> </LinearLayout> <Button android:id="@+id/btnlogin" android:layout_width="200dp" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:text="@string/login" />
Logout page layout design:
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:text="@string/logout page" android:textSize="15sp" /> <Button android:id="@+id/btncancel" android:layout_width="200dp" android:layout_height="wrap_content" android:text="@string/cancel" />
LoginActivity.java:
package com.xiaoyan.autologin; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class LoginActivity extends Activity { // define the component private EditText edtAccount; private EditText edtPassword; private Button btnLogin; // used to record account and password private String strAccount = ""; private String strPassword = ""; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate (savedInstanceState); setContentView(R.layout.login_main); // set the title setTitle("Login"); // Get the sharedpreferences object SharedPreferences share = getSharedPreferences("Login", Context.MODE_PRIVATE); strAccount = share.getString("Account", ""); strPassword = share.getString("Password", ""); // Determine if you have logged in before if (share == null) { init(); } else { // Determine if you have just logged out if (share.getBoolean("LoginBool", false)) { // Jump to the logout page and destroy the current activity Intent intent = new Intent(LoginActivity.this, CancelActivity.class); startActivity(intent); finish(); } else { init(); } } } private void init() { // Initialization module edtAccount = (EditText) findViewById(R.id.edtaccount); edtPassword = (EditText) findViewById(R.id.edtpassword); btnLogin = (Button) findViewById(R.id.btnlogin); edtAccount.setText (strAccount); edtPassword.setText(strPassword); // listen button btnLogin.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // Determine if the account and password are empty or not if (edtAccount.getText().toString().equals("") || edtPassword.getText().toString().equals("")) { Toast.makeText(LoginActivity.this, "The account or password cannot be empty", Toast.LENGTH_SHORT).show(); } else { // Create a SharedPreferences object to store the account and password and make it private SharedPreferences share = getSharedPreferences("Login", Context.MODE_PRIVATE); // Get the editor to store data in sharedpreferences Editor editor = share.edit(); editor.putString("Account", edtAccount.getText().toString()); editor.putString("Password", edtPassword.getText() .toString()); editor.putBoolean("LoginBool", true); // Submit data to sharedpreferences editor.commit(); // Jump to the logout page and destroy the current activity Intent intent = new Intent(LoginActivity.this, CancelActivity.class); startActivity(intent); finish(); } } }); } }
CancelActivity.java:
package com.xiaoyan.autologin; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.view.View; import android.widget.Button; public class CancelActivity extends Activity { // define the component private Button btnCancel; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate (savedInstanceState); setContentView(R.layout.cancel_activity); // set the title setTitle("Cancel"); // initialize the page init(); } private void init() { // Initialization module btnCancel = (Button) findViewById(R.id.btncancel); // Listen for the logout button btnCancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub // cancel the account and destroy the current page SharedPreferences share = getSharedPreferences("Login", Context.MODE_PRIVATE); share.edit().putBoolean("LoginBool", false).commit(); Intent intent = new Intent(CancelActivity.this, LoginActivity.class); startActivity(intent); finish(); } }); } }