Java 在android studio中单击actionbar菜单中的项目时跳转到另一个活动
这是菜单中选择项的代码,当用户单击“注销”时,活动跳到“登录”\u活动,当用户单击“帐户”时,活动跳到“帐户”\u活动Java 在android studio中单击actionbar菜单中的项目时跳转到另一个活动,java,android,android-activity,android-actionbar,Java,Android,Android Activity,Android Actionbar,这是菜单中选择项的代码,当用户单击“注销”时,活动跳到“登录”\u活动,当用户单击“帐户”时,活动跳到“帐户”\u活动 @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()){ case R.id.logout_id: Intent login = new Intent(MainpanelActivity.this, Logi
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.logout_id:
Intent login = new Intent(MainpanelActivity.this, LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
case R.id.account_id:
Intent account =new Intent(MainpanelActivity.this,AccountActivity.class);
startActivity(account);
default:
return super.onOptionsItemSelected(item);
}
}
但是,在测试过程中,无论单击什么,活动都会跳转到account活动
如果我切换开关箱的顺序
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.account_id:
Intent account =new Intent(MainpanelActivity.this,AccountActivity.class);
startActivity(account);
case R.id.logout_id:
Intent login = new Intent(MainpanelActivity.this, LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
default:
return super.onOptionsItemSelected(item);
}
}
无论我单击什么,活动都会跳转到登录活动。有人知道为什么吗?您需要添加
break在每种情况下,代码>到,如下所示。否则,您的代码将执行满足切换条件的情况,并在其之后执行每个情况,直到中断代码>或到达开关的末端
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.account_id:
Intent account =new Intent(MainpanelActivity.this,AccountActivity.class);
startActivity(account);
break;
case R.id.logout_id:
Intent login = new Intent(MainpanelActivity.this, LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
break;
default:
return super.onOptionsItemSelected(item);
}
}