登录注册并记住状态

点击由此页面调到登录页面
public class HomeActivity extends FragmentActivity {
List《Fragment》 list;
ViewPager vp;
RadioGroup rg;
RadioButton rb1,rb2,rb3,rb4,rb5;
Fragment_sy fragment_sy;
Fragment_wt fragment_wt;
Fragment_fl fragment_xx;
Fragment_gwc fragment_gwc;
Fragment_wd fragment_wd;
SharedPreferences sp;
boolean f;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
sp=getSharedPreferences(“flags”,MODE_PRIVATE);
f = sp.getBoolean(“f”, false);
rg = (RadioGroup) findViewById(R.id.rg);
rb1 = (RadioButton) findViewById(R.id.rb1);
rb2 = (RadioButton) findViewById(R.id.rb2);
rb3 = (RadioButton) findViewById(R.id.rb3);
rb4 = (RadioButton) findViewById(R.id.rb4);
rb5 = (RadioButton) findViewById(R.id.rb5);
rg.check(R.id.rb1);
fragment_sy=new Fragment_sy();
fragment_wt=new Fragment_wt();
fragment_xx=new Fragment_fl();
fragment_gwc=new Fragment_gwc();
fragment_wd=new Fragment_wd();
showFrag(R.id.fl,fragment_sy,”fragment_sy”);
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
switch (i) {
case R.id.rb1:
showFrag(R.id.fl,fragment_sy,”fragment_sy”);
break;
case R.id.rb2:
showFrag(R.id.fl,fragment_wt,”fragment_wt”);
break;
case R.id.rb3:
showFrag(R.id.fl,fragment_xx,”fragment_xx”);
break;
case R.id.rb4:
showFrag(R.id.fl,fragment_gwc,”fragment_gwc”);
if(f){
Toast.makeText(HomeActivity.this,”进入购物车”,Toast.LENGTH_SHORT).show();
}else{
Intent intent = new Intent(HomeActivity.this, LoginActivity.class);
startActivity(intent);
}
break;
case R.id.rb5:
showFrag(R.id.fl,fragment_wd,”fragment_wd”);
if(f){
Toast.makeText(HomeActivity.this,”进入我的”,Toast.LENGTH_SHORT).show();
}else{
Intent intent1 = new Intent(HomeActivity.this, LoginActivity.class);
startActivity(intent1);
}
break;
default:
break;
}
}
});
}
private void showFrag(int id,Fragment frag,String tag){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
Fragment fragment = getSupportFragmentManager().findFragmentByTag(tag);
if(fragment==null){
transaction.add(id,frag,tag);
}
List list=getSupportFragmentManager().getFragments();
for(Fragment f:list){
transaction.hide(f);
}
transaction.show(frag);
transaction.commit();
}
private long exitTime = 0;
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK
&& event.getAction() == KeyEvent.ACTION_DOWN) {
if ((System.currentTimeMillis() - exitTime) > 2000) {
Toast.makeText(HomeActivity.this,”再按一次退出程序”,Toast.LENGTH_SHORT).show();
exitTime = System.currentTimeMillis();
} else {
finish();
System.exit(0);
}
return true;
}
return super.onKeyDown(keyCode, event);
}

登录页面
public class LoginActivity extends AppCompatActivity implements View.OnClickListener {

private Button mLoginBtn;private Button mZhuceBtn;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_login);    initView();}private void initView() {    mLoginBtn = (Button) findViewById(R.id.btn_login);    mLoginBtn.setOnClickListener(this);    mZhuceBtn = (Button) findViewById(R.id.btn_zhuce);    mZhuceBtn.setOnClickListener(this);}@Overridepublic void onClick(View v) {    switch (v.getId()) {        case R.id.btn_login:            Intent intent = new Intent(LoginActivity.this,MainActivity.class);            startActivity(intent);            break;        case R.id.btn_zhuce:            // TODO 17/10/20            Intent intent1 = new Intent(LoginActivity.this,ZhuceActivity.class);            startActivity(intent1);            break;        default:            break;    }}

}

注册页面
public class ZhuceActivity extends AppCompatActivity implements View.OnClickListener {

private EditText mPhoneEt;private EditText mPassEt;private EditText mPass2Et;private Button mZhuceBtn;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_zhuce);    initView();}private void initView() {    mPhoneEt = (EditText) findViewById(R.id.et_phone);    mPassEt = (EditText) findViewById(R.id.et_pass);    mPass2Et = (EditText) findViewById(R.id.et_pass2);    mZhuceBtn = (Button) findViewById(R.id.btn_zhuce);    mZhuceBtn.setOnClickListener(this);}@Overridepublic void onClick(View v) {    switch (v.getId()) {        case R.id.btn_zhuce:            // TODO 17/10/20            String phone = mPhoneEt.getText().toString();            String pass = mPassEt.getText().toString();            String pass2 = mPass2Et.getText().toString();            CommonUser.userInfo=new UserInfo(phone,pass);            Log.i("========", ""+CommonUser.userInfo.getName()+CommonUser.userInfo.getPass());            Intent intent = new Intent(ZhuceActivity.this,LoginActivity.class);            startActivity(intent);            break;        default:            break;    }}

}

登录Presenter
public class LoginPresenter {
IUserLoginModel model;
IUserLoginView view;
Context context;
SharedPreferences sp;
SharedPreferences.Editor editor;
boolean flag=false;
public LoginPresenter(IUserLoginView view, Context context) {
this.view = view;
this.context = context;
model = new UserLoginModel(context);
sp=context.getSharedPreferences(“flags”,context.MODE_PRIVATE);
editor = sp.edit();
}
public void showUserInfo(){
UserInfo info = model.getUserInfo();
view.setTextName(info.getName());
view.setTextPass(info.getPass());

}public void savaUserInfo(){    String name = view.getTextName();    String pass = view.getTextPass();    model.saveUserInfo(name,pass);}public void login(){    final String name = view.getTextName();    final String pass = view.getTextPass();    final String name1 = CommonUser.userInfo.getName();    final String pass1 = CommonUser.userInfo.getPass();    Log.i("---------", "login: "+name1.toString()+pass1.toString());    if(name.equals("")||pass.equals("")){        Toast.makeText(context,"用户名或密码不能为空！",Toast.LENGTH_SHORT).show();        return;    }else if(!name.equals(name1)&&!pass.equals(pass1) ){        Toast.makeText(context,"用户名或密码错误！",Toast.LENGTH_SHORT).show();        return;    }else {        new AsyncTask<String ,String,String >(){            @Override            protected String doInBackground(String... strings) {                return null;            }            @Override            protected void onPostExecute(String s) {                super.onPostExecute(s);                model.saveUserInfo(pass1, name1);                Toast.makeText(context,"登陆成功",Toast.LENGTH_SHORT).show();                flag=true;                editor.putBoolean("f",true);                editor.commit();                Intent intent = new Intent(context, HomeActivity.class);                context.startActivity(intent);            }        }.execute();    }}

}

主页面
public class MainActivity extends AppCompatActivity implements IUserLoginView{

Button btn;EditText et_name,et_pass;LoginPresenter presenter;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    requestWindowFeature(Window.FEATURE_NO_TITLE);    setContentView(R.layout.activity_main);    btn= (Button) findViewById(R.id.btn);    et_name = (EditText) findViewById(R.id.et_name);    et_pass = (EditText) findViewById(R.id.et_pass);    presenter = new LoginPresenter(this,this);    presenter.showUserInfo();    btn.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {            presenter.login();        }    });}@Overridepublic void setTextName(String name) {    et_name.setText(name);}@Overridepublic void setTextPass(String pass) {    et_pass.setText(pass);}@Overridepublic String getTextName() {    return et_name.getText().toString();}@Overridepublic String getTextPass() {    return et_pass.getText().toString();}

}

Model

public interface IUserLoginModel {
public void login(String name,String pass);
public void saveUserInfo(String name,String pass);
public UserInfo getUserInfo();
}

public class UserLoginModel implements IUserLoginModel{
Context context;
SharedPreferences sp;
SharedPreferences.Editor editor;

public UserLoginModel(Context context){    this.context = context;    sp=context.getSharedPreferences("user",Context.MODE_PRIVATE);    editor = sp.edit();}@Overridepublic void login(String name, String pass) {    NetUtils.getNetData();}@Overridepublic void saveUserInfo(String name, String pass) {    editor.putString("name",name);    editor.putString("pass",pass);    editor.commit();}@Overridepublic UserInfo getUserInfo() {    String name = sp.getString("name","");    String pass = sp.getString("pass","");    UserInfo user = new UserInfo(name,pass);    return user;}

}

View
public interface IUserLoginView {
public void setTextName(String name);
public void setTextPass(String pass);
public String getTextName();
public String getTextPass();
}