CODEWITHSUNDEEP
androidandroid-actionbartoolbar
salmanseifian
salmanseifian

Reputation: 1082

Show/Hide Back Button in Toolbar

I want to show back button in toolbar under some circumstances, and hide it under another. I wrote below code:

public void setupToolbar() {
    if (mStacks.get(mCurrentTab).size() > 1) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
        toolbar.setNavigationOnClickListener(v -> onBackPressed());
    } else {
        getSupportActionBar().setDisplayHomeAsUpEnabled(false);
        getSupportActionBar().setHomeButtonEnabled(false);
    }
}

But my problem is when I set home button as false, It won't be visible anymore even the first condition becomes true. Can anybody help me?

Upvotes: 3

Views: 17458

Answers (2)

Monali
Monali

Reputation: 171

Show/Hide Back Button in Toolbar. please try it

show code

 if (getSupportActionBar() != null) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
    }

and hide code

 if (getSupportActionBar() != null) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(false);
        getSupportActionBar().setHomeButtonEnabled(false);
    }

Upvotes: 10

Mehrdad
Mehrdad

Reputation: 1637

if i have understood your point correctly you should use below codes:

 private void hideSystemUI() {
    // Enables regular immersive mode.
    // For "lean back" mode, remove SYSTEM_UI_FLAG_IMMERSIVE.
    // Or for "sticky immersive," replace it with SYSTEM_UI_FLAG_IMMERSIVE
    View decorView = getWindow().getDecorView();
    decorView.setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_IMMERSIVE
                    // Set the content to appear under the system bars so that the
                    // content doesn't resize when the system bars hide and show.
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    // Hide the nav bar and status bar
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_FULLSCREEN);
}

this function hides BackButton and HomeButton

for show you should use below codes:

private void showSystemUI() {
    View decorView = getWindow().getDecorView();
    decorView.setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}

Upvotes: 0

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