C# 如何使布局不可见
我正在开发一个Android应用程序 我有一些存储在SharedReferences中的属性 我需要布局-直到共享首选项中存储的值没有文本为止 存储值时,我需要使布局可见C# 如何使布局不可见,c#,android,xamarin,C#,Android,Xamarin,我正在开发一个Android应用程序 我有一些存储在SharedReferences中的属性 我需要布局-直到共享首选项中存储的值没有文本为止 存储值时,我需要使布局可见 zakazat.Click += delegate { var intent = new Intent (this, typeof(CartActivity)); intent.PutExtra ("title", (string)(firstitem ["post_title"
zakazat.Click += delegate {
var intent = new Intent (this, typeof(CartActivity));
intent.PutExtra ("title", (string)(firstitem ["post_title"]));
intent.PutExtra ("price", (string)(firstitem ["price"] + " грн"));
intent.PutExtra ("weight", (string)(firstitem ["weight"] + "г"));
StartActivity (intent);
ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences (this);
ISharedPreferencesEditor editor = prefs.Edit ();
editor.PutString ("title", (string)(firstitem ["post_title"]));
editor.PutString ("price", (string)(firstitem ["price"] + " грн"));
editor.PutString ("weight", (string)(firstitem ["weight"] + "г"));
editor.Apply ();
};
在其他活动中:
private void Display (){
LinearLayout display2 = FindViewById<LinearLayout> (Resource.Id.linearLayout12);
//LinearLayout display = FindViewById<LinearLayout> (Resource.Id.linearLayout13);
TextView productname = FindViewById<TextView> (Resource.Id.posttittle);
TextView price = FindViewById<TextView> (Resource.Id.price);
TextView weight = FindViewById<TextView> (Resource.Id.weight);
productname.Text = Intent.GetStringExtra ("title");
price.Text = Intent.GetStringExtra("price");
weight.Text = Intent.GetStringExtra("weight");
display2.Visibility = ViewStates.Visible;
ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences (this);
string product = prefs.GetString ("title", "");
string _price = prefs.GetString ("price", "");
string _weight = prefs.GetString ("weight", "");
productname.Text = product;
price.Text = _price;
weight.Text = _weight;
//price.Text = Intent.GetStringExtra("price");
//weight.Text = Intent.GetStringExtra("weight");
//display2.Visibility = ViewStates.Visible;
productname.Visibility = ViewStates.Visible;
price.Visibility = ViewStates.Visible;
weight.Visibility = ViewStates.Visible;
}
private void显示(){
LinearLayout display2=FindViewById(Resource.Id.LinearLayout2);
//LinearLayout display=findviewbyd(Resource.Id.linearLayout13);
TextView productname=FindViewById(Resource.Id.PostTitle);
TextView price=findviewbyd(Resource.Id.price);
TextView-weight=findviewbyd(Resource.Id.weight);
productname.Text=Intent.GetStringExtra(“标题”);
price.Text=Intent.GetStringExtra(“价格”);
weight.Text=Intent.GetStringExtra(“重量”);
display2.Visibility=ViewStates.Visible;
iSharedReferences prefs=PreferenceManager.GetDefaultSharedReferences(此);
string product=prefs.GetString(“title”,”);
string _price=prefs.GetString(“price”,”);
string _weight=prefs.GetString(“weight”,”);
productname.Text=产品;
Text=_价格;
文本=_权重;
//price.Text=Intent.GetStringExtra(“价格”);
//weight.Text=Intent.GetStringExtra(“重量”);
//display2.Visibility=ViewStates.Visible;
productname.Visibility=ViewState.Visible;
price.Visibility=ViewStates.Visible;
weight.Visibility=ViewStates.Visible;
}
如何操作?默认情况下,您的视图可见性设置可见性(已消失) 之后。 首先,每秒钟检查一次SharedReference值是否不等于默认值。如果为真,则视图可见性设置为visibility visible 试试这段代码我不确定,但我认为这段代码会成功
Thread t = new Thread() {
@Override
public void run() {
try {
while (!isInterrupted()) {
Thread.sleep(1000);
runOnUiThread(new Runnable() {
@Override
public void run() {
SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
String value = shared.getString("key","Default");
if(!value.equalsto("Default"){
view.setVisibility(View.VISIBLE);
}
}
});
}
} catch (InterruptedException e) {
}
}
};
t.start();
我不知道你在问什么。你想让一些
TextView
s的可见性设置为gone
,直到你可以从SharedReferences
检索文本为止吗?是的,我想it@PPartisan