Android：具有noHistory和SharePrefs的登录屏幕，但退出应用程序后，它将返回到登录屏幕
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我能够打开该应用程序，它首先打开登录屏幕，登录后将带您到ѭ0。从“ 0”开始，没有任何可登录的内容，它将一直保持会话状态直到注销。但是，当我退出该应用程序时，即使我有一个“ 2”字样也可以返回登录屏幕，该文件名将会话中的用户名保存了下来。我在
manifest
nohistory=true
MainActivity
mainactivity.class
logout > login > mainactivity
myhistory=true
public class Login extends Activity {
private EditText etUsername;
private Button btnLogin;
private Button btnCancel;
private TextView lblResult;
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if(keyCode==KeyEvent.KEYCODE_BACK)
{
this.startActivity(new Intent(Login.this,Login.class));
}
return true;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
btnLogin.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String username = etUsername.getText().toString();
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
SharedPreferences.Editor editor = prefs.edit();
editor.putString(\"username\", username);
if(username.equals(\"1111\")){
lblResult.setText(\"Login successful.\");
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
public class LogoutActivity extends Activity {
private Button btnLogout;
private Button btnCancel;
private TextView lblResult;
private EditText code;
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if(keyCode==KeyEvent.KEYCODE_BACK)
{
this.startActivity(new Intent(LogoutActivity.this,MainActivity.class));
}
return true;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.logout);
code = (EditText)findViewById(R.id.codeout);
btnLogout = (Button) findViewById(R.id.submit);
btnCancel = (Button) findViewById(R.id.cancel);
lblResult = (TextView)findViewById(R.id.result);
btnLogout.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String logout = code.getText().toString();
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
SharedPreferences.Editor editor = settings.edit();
editor.remove(\"username\");
if (logout.equals(\"99999\")){
lblResult.setText(\"Logout successful\");
Intent i = new Intent(getApplicationContext(), Login.class);
startActivity(i);
} else {
lblResult.setText(\"Logout failed\");
}
}
});
btnCancel.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
}
});
没有找到相关结果
已邀请:
2 个回复
嗓瑰
中，检查SharedPref中的用户ID。如果存在，请直接转到ѭ0。篮肥炼皖
String unique_id = loginSharedPreferences .getString(\"UniqueId\", \"NA\"); if (unique_id.equals(\"\")) { Intent intent = new Intent(Splace_Screen.this, LoginActivity.class); startActivity(intent); } else { Intent intent = new Intent(Splace_Screen.this, DrawerActivity.class); startActivity(intent); } finish();