Android存儲方式有很多種，在這里所用的存儲方式是SharedPreferrences， 其采用了Map數據結構來存儲數據，以鍵值的方式存儲，可以簡單的讀取與寫入。所以比較適合我們今天做的這個項目。我們來看一下運行圖：
一.布局界面
1.login_top.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="@dimen/activity_horizontal_margin" android:background="@drawable/logintop_roundbg"> <EditText android:id="@+id/etName" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" android:drawablePadding="10dp" android:background="@android:drawable/edit_text" android:drawableLeft="@drawable/icon_user" android:hint="@string/etName"> <requestFocus></requestFocus> </EditText> <EditText android:id="@+id/etPassword" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/etName" android:inputType="textPassword" android:ems="10" android:drawablePadding="10dp" android:background="@android:drawable/edit_text" android:drawableLeft="@drawable/icon_pass" android:hint="@string/etpassword"> <requestFocus></requestFocus> </EditText> <CheckBox android:id="@+id/cbremenber" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/etPassword" android:text="@string/cbpass"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/cbremenber"> <Button android:id="@+id/btnlogin" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:background="@drawable/btnselect" android:text="@string/btnlogin" android:onClick="login"/> <Button android:id="@+id/btnRegister" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:background="@drawable/btnselect" android:text="@string/btnRegister" android:layout_marginLeft="10dp"/> </LinearLayout></RelativeLayout>
2.activity_main.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/loginbg" tools:context="cn.edu.bzu.logindemo.MainActivity"> <include layout="@layout/login_top"></include> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/deer" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" /></RelativeLayout>
3.activity_welcome.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_welcome" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="cn.edu.bzu.logindemo.WelcomeActivity"> <TextView android:id="@+id/tvwelcome" android:text="Welcome you" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="200dp" android:textSize="40sp" /></RelativeLayout>
二.MainActivity
public class MainActivity extends AppCompatActivity { private EditText etName; private EditText etPassword; private SharedPreferences sharedPreferences; private CheckBox cbremenber; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initViews(); sharedPreferences=getSharedPreferences("remenberpassword", Context.MODE_PRIVATE); boolean isRemember=sharedPreferences.getBoolean("remenberpassword",false); if(isRemember) { String name = sharedPreferences.getString("name", ""); String password = sharedPreferences.getString("password", ""); etName.setText(name); etPassword.setText(password); cbremenber.setChecked(true); } } private void initViews() { etName=(EditText) findViewById(R.id.etName); etPassword=(EditText) findViewById(R.id.etPassword); cbremenber=(CheckBox)findViewById(R.id.cbremenber); } public void login(View view){ String name=etName.getText().toString(); String password=etPassword.getText().toString(); if("admin".equals(name)&&"123456".equals(password)){ SharedPreferences.Editor editor= sharedPreferences.edit(); if(cbremenber.isChecked()){ editor.putBoolean("remenberpassword",true); editor.putString("name",name); editor.putString("password",password); }else { editor.clear(); } editor.commit(); Intent intent=new Intent(this,WelcomeActivity.class); startActivity(intent); finish(); }else { Toast.makeText(this,"賬號或密碼有誤",Toast.LENGTH_LONG).show(); } }}三.WelcomeActivity
public class WelcomeActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_welcome); }}以上所述是小編給大家介紹的Android 使用SharedPreferrences儲存密碼登錄界面記住密碼，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對VEVB武林網網站的支持！
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