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Disable toolbar scroll flag when content it's not enough to fill the screen
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public class ToolbarActivity extends AppCompatActivity { | |
// Set the flags that fit your needs | |
private static final int ENABLED_SCROLL_BEHAVIOR = AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL; | |
private static final int DISABLED_SCROLL_BEHAVIOR = 0; | |
private static final int SCROLL_DOWN = 1; | |
//Injected via ButterKnife (http://jakewharton.github.io/butterknife) | |
@InjectView(R.id.toolbar) | |
Toolbar toolbar; | |
@InjectView(R.id.recyclerview) | |
RecyclerView recyclerView; | |
private final View.OnLayoutChangeListener recyclerViewChangeListener = new View.OnLayoutChangeListener() { | |
@Override | |
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) { | |
updateToolbarScrollBehavior(); | |
} | |
}; | |
@Override | |
public void onResume() { | |
super.onResume(); | |
recyclerView.addOnLayoutChangeListener(recyclerViewChangeListener); | |
} | |
@Override | |
public void onPause() { | |
super.onPause(); | |
recyclerView.removeOnLayoutChangeListener(recyclerViewChangeListener); | |
} | |
private void updateToolbarScrollBehavior() { | |
applyScrollBehavior(DISABLED_SCROLL_BEHAVIOR); | |
if (recyclerView.canScrollVertically(SCROLL_DOWN)) { | |
applyScrollBehavior(ENABLED_SCROLL_BEHAVIOR); | |
} | |
} | |
private void applyScrollBehavior(int scrollFlags) { | |
AppBarLayout.LayoutParams layoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams(); | |
layoutParams.setScrollFlags(scrollFlags); | |
toolbar.setLayoutParams(layoutParams); | |
} | |
} |
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