Java 从“活动”返回时更改菜单项
当我从另一个活动返回到将转到新目的的设置时,我想更改菜单的menuitem寄存器。单击菜单项中的“注册”后,“活动”进入“注册活动”。从RegisterActivity返回时,我想将菜单项register更改为settingsJava 从“活动”返回时更改菜单项,java,android,Java,Android,当我从另一个活动返回到将转到新目的的设置时,我想更改菜单的menuitem寄存器。单击菜单项中的“注册”后,“活动”进入“注册活动”。从RegisterActivity返回时,我想将菜单项register更改为settings package com.mausamakasvani.srsk.mausamakasvani; public class LoginActivity extends AppCompatActivity { private EditText password;
package com.mausamakasvani.srsk.mausamakasvani;
public class LoginActivity extends AppCompatActivity {
private EditText password;
private EditText userName;
public static boolean Register;
public static final int REG_REQ_CODE = 235;
private int x = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
ActionBar as = getSupportActionBar();
as.setTitle("Login");
userName = (EditText)findViewById(R.id.username);
password = (EditText)findViewById(R.id.password);
}
public void onLoginClicked(View view){
/*
*/
if (!MausamCheckList.getStringValue(this,MausamCheckList.USER_NAME).equals(MausamCheckList.DEF_VALUE)) {
if (userName.getText().toString().equals(MausamCheckList.getStringValue(this, MausamCheckList.USER_NAME)) && password.getText().toString().equals(MausamCheckList.getStringValue(this, MausamCheckList.PASSWORD))) {
Intent intent = new Intent(this,SheharChunoActivity.class);
startActivity(intent);
//finish();
}else {
MausamCheckList.displayToast(this,"Username or Password is Wrong!!!");
}
}else{
MausamCheckList.displayToast(this,"Please register");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
if(x==0)
getMenuInflater().inflate(R.menu.menu_login, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
Intent intent = new Intent(this,RegisterActivity.class);
startActivityForResult(intent,REG_REQ_CODE);
//startActivity(intent);
return super.onOptionsItemSelected(item);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REG_REQ_CODE) {
if (resultCode == RegisterActivity.REG_RES_CODE) {
x=RegisterActivity.REG_RES_CODE;
}
}
}
}
您可以在一个menu.xml文件中包含这两个菜单项,具体取决于要显示特定项的更改可见性。您可以在活动中简单地保持对
菜单的引用(并使用findItem
方法)或MenuItem
,并像这样管理它(伪代码):
你也可以使用
public boolean onPrepareOptionsMenu (Menu menu)
它被称为“每次菜单”,显示在屏幕上,并根据条件显示正确的菜单项
您可以在一个menu.xml文件中包含这两个菜单项,具体取决于您希望显示特定项的更改可见性。您可以在活动中简单地保持对菜单的引用(并使用findItem
方法)或MenuItem
,并像这样管理它(伪代码):
你也可以使用
public boolean onPrepareOptionsMenu (Menu menu)
它被称为“每次菜单”,显示在屏幕上,并根据条件显示正确的菜单项