Develop Reference

Raw use of parameterized class on Android Studio

I have this code on my Android project:
final BottomSheetBehavior infoBottomSheetBehavior = BottomSheetBehavior.from(findViewById(R.id.info_view));
infoBottomSheetBehavior.addBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
#Override
public void onStateChanged(#NonNull View bottomSheet, int newState) {
if (newState == BottomSheetBehavior.STATE_DRAGGING) {
infoBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
}
}
#Override
public void onSlide(#NonNull View bottomSheet, float slideOffset) {
}
});
And the next warning appears over BottomSheetBehavior: Raw use of parameterized class 'BottomSheetBehavior'
Does anybody know how to avoid this warning?

Ok, here is the so basic answer from a coffee talk...
final BottomSheetBehavior<View> infoBottomSheetBehavior = BottomSheetBehavior.from(findViewById(R.id.info_view));
infoBottomSheetBehavior.addBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
#Override
public void onStateChanged(#NonNull View bottomSheet, int newState) {
if (newState == BottomSheetBehavior.STATE_DRAGGING) {
infoBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
}
}
#Override
public void onSlide(#NonNull View bottomSheet, float slideOffset) {
}
});
I've just missed the <View>

Keep Buttomsheet in collapsible state

I have a bottom sheet that has inside a listview, I don't want to have the behaviour to expand or to dismiss, I just want to keep it at the fixed size, Now it shows at the size I want (70% of screen) but on slide up or down it changes its state.
Is there a way i can do this?
I have tried:
BottomSheetBehavior.BottomSheetCallback bottomSheetCallback = new BottomSheetBehavior.BottomSheetCallback() {
#Override
public void onStateChanged(#NonNull View bottomSheet, int newState) {
if (newState == BottomSheetBehavior.STATE_HIDDEN) {
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
// dismiss();
}
}
#Override
public void onSlide(#NonNull View bottomSheet, float slideOffset) {
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
}
};
// bottomSheetBehavior.setBottomSheetCallback(bottomSheetCallback);
if (behavior != null && behavior instanceof BottomSheetBehavior) {
((BottomSheetBehavior) behavior).setBottomSheetCallback(bottomSheetCallback);
((BottomSheetBehavior) behavior).setPeekHeight(((RestaurantsActivity) getActivity()).getHeightForFragment());
}

Android BottomSheetBehavior, how to disable snap?

Standard android BottomSheetBehavior has tree state: hidden, collapsed and expanded.
I want to allow user to "leave" bottom sheet between collapsed and expanded. Now, with the default behavior, it will snap to collapsed or expanded based which is closest. How should I disable this snap functionality?

I will present a way to achievie such functionality for a View extending BottomSheetDialogFragment.
Expanding:
First of all overrive onResume:
#Override
public void onResume() {
super.onResume();
addGlobaLayoutListener(getView());
}
private void addGlobaLayoutListener(final View view) {
view.addOnLayoutChangeListener(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) {
setPeekHeight(v.getMeasuredHeight());
v.removeOnLayoutChangeListener(this);
}
});
}
public void setPeekHeight(int peekHeight) {
BottomSheetBehavior behavior = getBottomSheetBehaviour();
if (behavior == null) {
return;
}
behavior.setPeekHeight(peekHeight);
}
What the code above is supposed to do is just setting the BottomSheet peekHeight to the heigth of the view. The key here is the function getBottomSheetBehaviour(). The implementation is below:
private BottomSheetBehavior getBottomSheetBehaviour() {
CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) ((View) getView().getParent()).getLayoutParams();
CoordinatorLayout.Behavior behavior = layoutParams.getBehavior();
if (behavior != null && behavior instanceof BottomSheetBehavior) {
((BottomSheetBehavior) behavior).setBottomSheetCallback(mBottomSheetBehaviorCallback);
return (BottomSheetBehavior) behavior;
}
return null;
}
This just check if the parent of View has 'CoordinatorLayout.LayoutParams' set. If yes, sets appropriate BottomSheetBehavior.BottomSheetCallback (which is needed in the next part), and more importantly returns the CoordinatorLayout.Behavior, which is supposed to be BottomSheetBehavior.
Collapsing:
Here a [`BottomSheetBehavior.BottomSheetCallback.onSlide (View bottomSheet, float slideOffset)``](https://developer.android.com/reference/android/support/design/widget/BottomSheetBehavior.BottomSheetCallback.html#onSlide(android.view.View, float)) is just exactly what is needed. From the [documentation](https://developer.android.com/reference/android/support/design/widget/BottomSheetBehavior.BottomSheetCallback.html#onSlide(android.view.View, float)):
Offset increases as this bottom sheet is moving upward. From 0 to 1 the sheet is between collapsed and expanded states and from -1 to 0 it is between hidden and collapsed states.
This means, that just checking the second parameter is needed for collapse detection:
define BottomSheetBehavior.BottomSheetCallback in the same class:
private BottomSheetBehavior.BottomSheetCallback mBottomSheetBehaviorCallback = new BottomSheetBehavior.BottomSheetCallback() {
#Override
public void onStateChanged(#NonNull View bottomSheet, int newState) {
if (newState == BottomSheetBehavior.STATE_HIDDEN) {
dismiss();
}
}
#Override
public void onSlide(#NonNull View bottomSheet, float slideOffset) {
if (slideOffset < 0) {
dismiss();
}
}
};

how to in swipelistview item only swipe to left

im used this libarary https://github.com/47deg/android-swipelistview
in project im want row only swipe to left and not allow swipe rows
with wiche other and when clicked row not swipeing and open new Activity
public class Aragh extends Activity {
SwipeListView swipelistview;
ItemAdapter adapter;
List<ItemRow> itemData;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.aragh);
swipelistview=(SwipeListView)findViewById(R.id.example_swipe_lv_list);
itemData=new ArrayList<ItemRow>();
adapter=new ItemAdapter(this,R.layout.custom_row,itemData);
swipelistview.setSwipeListViewListener(new BaseSwipeListViewListener() {
#Override
public void onOpened(int position, boolean toRight) {
}
#Override
public void onClosed(int position, boolean fromRight) {
}
#Override
public void onListChanged() {
}
#Override
public void onMove(int position, float x) {
}
#Override
public void onStartOpen(int position, int action, boolean right) {
Log.d("swipe", String.format("onStartOpen %d - action %d", position, action));
}
#Override
public void onStartClose(int position, boolean right) {
Log.d("swipe", String.format("onStartClose %d", position));
}
#Override
public void onClickFrontView(int position) {
Log.d("swipe", String.format("onClickFrontView %d", position));
swipelistview.openAnimate(position); //when you touch front view it will open
}
#Override
public void onClickBackView(int position) {
Log.d("swipe", String.format("onClickBackView %d", position));
swipelistview.closeAnimate(position);//when you touch back view it will close
}
#Override
public void onDismiss(int[] reverseSortedPositions) {
}
});
//These are the swipe listview settings. you can change these
//setting as your requirement
swipelistview.setSwipeMode(SwipeListView.SWIPE_MODE_RIGHT); // there are five swiping modes
swipelistview.setSwipeActionLeft(SwipeListView.SWIPE_ACTION_DISMISS); //there are four swipe actions
swipelistview.setSwipeActionRight(SwipeListView.SWIPE_ACTION_DISMISS);
swipelistview.setOffsetLeft(convertDpToPixel(0f)); // left side offset
swipelistview.setOffsetRight(convertDpToPixel(80f)); // right side offset
swipelistview.setAnimationTime(500); // Animation time
swipelistview.setSwipeOpenOnLongPress(false); // enable or disable SwipeOpenOnLongPress
swipelistview.setAdapter(adapter);
for(int i=0;i<10;i++)
{
itemData.add(new ItemRow("Swipe Item"+i,getResources().getDrawable(R.drawable.ic_launcher) ));
}
adapter.notifyDataSetChanged();
}
public int convertDpToPixel(float dp) {
DisplayMetrics metrics = getResources().getDisplayMetrics();
float px = dp * (metrics.densityDpi / 160f);
return (int) px;
}
}

I recommend doing it in XML.
in your SwipeListView tag add
swipe:swipeMode="left"
it locks your swipe mode to the left.
you can choose - left / right / both .

You just need to put swipe:swipeMode="left" inside <....SwipeListView /> in your xml layout to allow swiping only in left direction

Navigation Drawer move whole screen

I'm trying to make Navigation Drawer which moves whole screen (whole height, not width). I'm not using ActionBar and other libraries, just default Android drawer. Anyone have any examples?

What you need to do is to set the translationX property of your content view by the pixel amount the drawer has moved to.
In your implementation of http://developer.android.com/reference/android/support/v4/widget/DrawerLayout.DrawerListener.html you should implement onDrawerSlide(View drawerView, float slideOffset).
In this method you should add this line.
mDrawerLayout.findViewById(R.id.your_content_id).setTranslationX(drawerView.getWidth() * slideOffset);
That should do the trick.

Implements DrawerListener (passing as parameter the R.id of your layout):
import android.animation.ObjectAnimator;
import android.support.v4.widget.DrawerLayout.DrawerListener;
import android.view.View;
public class DrawerLayoutListener implements DrawerListener {
private View _contentDrawer;
private int _idView;
public DrawerLayoutListener(int idView) {
_idView = idView;
}
#Override
public void onDrawerClosed(View arg0) {}
#Override
public void onDrawerOpened(View arg0) {}
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
if (_contentDrawer == null) _contentDrawer = ((View) drawerView.getParent()).findViewById(_idView);
float moveFactor = (drawerView.getWidth() * slideOffset);
ObjectAnimator.ofFloat(_contentDrawer, "translationX", moveFactor).setDuration(0).start();
}
#Override
public void onDrawerStateChanged(int arg0) {}
}
And set it as listener to your DrawerLayout:
drawer_layout.setDrawerListener(new DrawerLayoutListener(R.id.content_frame));