Android programming: mode selection and switching using a single activity, Show or hide view within a layout.
Sometimes ,we don’t want to create several new activities to implement some simple view switching. So we can hide or show some view within a single layout to achieve layout reuse. :shipit:
In the xml file 🔍
android:visibility="visible";
android:visibility="invisible";
android:visibility="gone";
In the java file 🔎
ImageView view = findViewById(R.id.Image_1)
view.setVisibility(View.VISIBLE);
view.setVisibility(View.INVISIBLE);
view.setVisibility(View.GONE);
Maybe we should also override the onOptionsItemSelected() function. 😶🌫️ Here is a sample: 🈂️
// Called when a button in the action bar is pressed
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId()) {
case android.R.id.home:
// If the back button was pressed, handle it the normal way
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
// Called when the user presses the back button
@Override
public void onBackPressed() {
// Close the activity
if(auto_follow_buttons.getVisibility() == View.VISIBLE){
auto_follow_buttons.setVisibility(View.GONE);
modes.setVisibility(View.VISIBLE);
}
else {
finish();
}
}
Original: https://www.cnblogs.com/litecdows/p/16520180.html
Author: litecdows
Title: How to show or hide views within a layout
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