I am struggling with the logic behind this, so any tips would be appreciated. I have two classes, one in which the fragment is created and one in which my custom view is created, and I am trying to do some animation. In the main layout, I have an edit text field and a button. What I want to do is to add to the custom view when a button is clicked, the text within the edit text will be added to the custom view. Thinking about HOW to do this, I am drawing a blank, and I am beginning to think it is not possible. Should I just create the edit text within the custom view? Here is the code showing what I am doing (but stuck on a next step, or whether or not I should scrap this approach and try a different one)
The main fragment
public class DestroyerView extends Fragment
{
private Context mContext;
Paint paint = new Paint();
private AnimatedNegative PositiveAnimatedNegative;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mContext = this.getActivity();
View view = inflater.inflate(R.layout.activity_destroyer, container, false);
final Button fire = (Button) view.findViewById(R.id.destroy);
PositiveAnimatedNegative = (AnimatedNegative) view.findViewById(R.id.anim_view);
fire.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View arg0)
{
// logic here?
}
});
return view;
}
}
public AnimatedNegative(Context context, AttributeSet attrs)
{
super(context, attrs);
mContext = this.getContext();
h = new Handler();
mCalendarDbHelper=new CalendarDbAdapter(mContext);
mCalendarDbHelper.open();
}
private Runnable r= new Runnable()
{
#Override
public void run()
{
invalidate();
}
};
protected void onDraw (Canvas canvas)
{
String word = "This is a sentence";
paint.setColor(Color.parseColor("#1E90FF"));
paint.setStyle(Style.FILL);
canvas.drawPaint(paint);
paint.setColor(Color.BLACK);
paint.setTextSize(20);
x = this.getWidth()/2;
y = this.getHeight()/2;
canvas.drawText(word, x, y, paint);
}
}
... Now this would be much easier if I could reference the button inside of the custom view, but it doesn't seem I can do that, or if I could simply add to the custom view inside of the main activity class, but it doesn't seem that I can do that either (not without creating a new canvas, which seems to be doing too much for what it is that I want to do (just add the words)). So, finally, is the way I am currently trying to do this a dead end? Any help would be appreciated.
I think I got it. I'll call invalidate with the the AnimatedNegative object defined in my main activity, and then pass in the word from the edit text and a true value, so that I can check for it in the view and redraw. Added code shown below:
Within the main activity:
public void onClick(View arg0)
{
PositiveAnimatedNegative.invalidate();
PositiveAnimatedNegative.add = true;
PositiveAnimatedNegative.positive_word = "This is a positive word";
}
And within the custom view:
if (add == true)
{
canvas.drawText(positive_word, x,y, paint);
}
Related
I have fragment from which I'm launching activity with shared element transition that has viewpager in it, the enter transition works fine but when i scroll in view pager and finish transition the shared image comes from left side which is not desired it should reposition itself to where it was launched, here is my code:
Intent myIntent = new Intent(getActivity(), EnlargeActivity.class);
ActivityOptionsCompat options = ActivityOptionsCompat.
makeSceneTransitionAnimation(getActivity(),
imageView,
ViewCompat.getTransitionName(imageView));
startActivity(myIntent, options.toBundle());
I'm updating view and its name in activity that contains viewpager when finishing activity, but its going with blink:
public void finishAfterTransition() {
setEnterSharedElementCallback(new SharedElementCallback() {
#Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
// Clear all current shared views and names
names.clear();
sharedElements.clear();
ViewGroup viewGroup = (ViewGroup) viewPagerDetail.getAdapter()
.instantiateItem(viewPagerDetail, viewPagerDetail.getCurrentItem());
if (viewGroup == null) {
return;
}
// Map the first shared element name to the child ImageView.
sharedElements.put(viewGroup.findViewById(R.id.img).getTransitionName(), viewGroup.findViewById(R.id.img));
// setExitSharedElementCallback((SharedElementCallback) this);
}
});
super.finishAfterTransition();
Basically, Android start the transition with your pre-defined View and transitionName and automatically use the same properties for the return transition. When you change your focused View in ViewPager, Android doesn't know about that and keep the transition on the previous one on its way back. So you need to inform Android about the changes:
Remap the transition properties: Use setEnterSharedElementCallback to change the transitionName and View to the new one before returning from Activity2.
Wait for the Activity1 to finish rendering addOnPreDrawListener.
It's a bit complex in the final implementation. But you can look at my sample code https://github.com/tamhuynhit/PhotoGallery. I try to implement the shared-element-transition from many simple to complex sections.
Your problem appeared from Level 3 and solved in Level 4.
I am writing a tutorial about this but it's not in English so hope the code can help
UPDATE 1: Work flow
Here is how I implement it in my code:
Override finishAfterTransition in Activity2 and call setEnterSharedElementCallback method to re-map the current selected item in ViewPager. Also, call setResult to pass the new selected index back to previous activity here.
#Override
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void finishAfterTransition() {
setEnterSharedElementCallback(new SharedElementCallback() {
#Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
View selectedView = getSelectedView();
if (selectedView == null)
return;
// Clear all current shared views and names
names.clear();
sharedElements.clear();
// Store new selected view and name
String transitionName = ViewCompat.getTransitionName(selectedView);
names.add(transitionName);
sharedElements.put(transitionName, selectedView);
setExitSharedElementCallback((SharedElementCallback) null);
}
});
Intent intent = new Intent();
intent.putExtra(PHOTO_FOCUSED_INDEX, mCurrentIndex);
setResult(RESULT_PHOTO_CLOSED, intent);
super.finishAfterTransition();
}
Write a custom ShareElementCallback so I can set the callback before knowing which View is going to be used.
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static class CustomSharedElementCallback extends SharedElementCallback {
private View mView;
/**
* Set the transtion View to the callback, this should be called before starting the transition so the View is not null
*/
public void setView(View view) {
mView = view;
}
#Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
// Clear all current shared views and names
names.clear();
sharedElements.clear();
// Store new selected view and name
String transitionName = ViewCompat.getTransitionName(mView);
names.add(transitionName);
sharedElements.put(transitionName, mView);
}
}
Override onActivityReenter in Activity1, get the selected index from the result Intent. Set setExitSharedElementCallback to re-map new selected View when the transition begins.Call supportPostponeEnterTransition to delay a bit because your new View may not be rendered at this point. Use getViewTreeObserver().addOnPreDrawListener to listen for the layout changes, find the right View by the selected index and continue the transition supportStartPostponedEnterTransition.
#Override
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void onActivityReenter(int resultCode, Intent data) {
if (resultCode != LevelFourFullPhotoActivity.RESULT_PHOTO_CLOSED || data == null)
return;
final int selectedIndex = data.getIntExtra(LevelFourFullPhotoActivity.PHOTO_FOCUSED_INDEX, -1);
if (selectedIndex == -1)
return;
// Scroll to the new selected view in case it's not currently visible on the screen
mPhotoList.scrollToPosition(selectedIndex);
final CustomSharedElementCallback callback = new CustomSharedElementCallback();
getActivity().setExitSharedElementCallback(callback);
// Listen for the transition end and clear all registered callback
getActivity().getWindow().getSharedElementExitTransition().addListener(new Transition.TransitionListener() {
#Override
public void onTransitionStart(Transition transition) {}
#Override
public void onTransitionPause(Transition transition) {}
#Override
public void onTransitionResume(Transition transition) {}
#Override
public void onTransitionEnd(Transition transition) {
removeCallback();
}
#Override
public void onTransitionCancel(Transition transition) {
removeCallback();
}
private void removeCallback() {
if (getActivity() != null) {
getActivity().getWindow().getSharedElementExitTransition().removeListener(this);
getActivity().setExitSharedElementCallback((SharedElementCallback) null);
}
}
});
// Pause transition until the selected view is fully drawn
getActivity().supportPostponeEnterTransition();
// Listen for the RecyclerView pre draw to make sure the selected view is visible,
// and findViewHolderForAdapterPosition will return a non null ViewHolder
mPhotoList.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
#Override
public boolean onPreDraw() {
mPhotoList.getViewTreeObserver().removeOnPreDrawListener(this);
RecyclerView.ViewHolder holder = mPhotoList.findViewHolderForAdapterPosition(selectedIndex);
if (holder instanceof ViewHolder) {
callback.setView(((ViewHolder) holder).mPhotoImg);
}
// Continue the transition
getActivity().supportStartPostponedEnterTransition();
return true;
}
});
}
UPDATE 2: getSelectedItem
To get selected View from the ViewPager, don't use getChildAt or you get the wrong View, use findViewWithTag instead
In the PagerAdapter.instantiateItem, use position as tag for each View:
#Override
public View instantiateItem(ViewGroup container, int position) {
// Create the View
view.setTag(position)
// ...
}
Listen to onPageSelected event to get the selected index:
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
mSelectedIndex = position;
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
Call getSelectedView to get the current view by the selected index
private View getSelectedView() {
try {
return mPhotoViewPager.findViewWithTag(mSelectedIndex);
} catch (IndexOutOfBoundsException | NullPointerException ex) {
return null;
}
}
This is actually a default behavior, I was struggling SharedElementTransitions a lot, but I have nested fragments. I got my solution from an article (very recent article), it shows an implementation with a RecyclerView, which I assume you have. In short, the solution is to override onLayoutChange :
recyclerView.addOnLayoutChangeListener(
new OnLayoutChangeListener() {
#Override
public void onLayoutChange(View view,
int left,
int top,
int right,
int bottom,
int oldLeft,
int oldTop,
int oldRight,
int oldBottom) {
recyclerView.removeOnLayoutChangeListener(this);
final RecyclerView.LayoutManager layoutManager =
recyclerView.getLayoutManager();
View viewAtPosition =
layoutManager.findViewByPosition(MainActivity.currentPosition);
// Scroll to position if the view for the current position is null (not
// currently part of layout manager children), or it's not completely
// visible.
if (viewAtPosition == null
|| layoutManager.isViewPartiallyVisible(viewAtPosition, false, true)){
recyclerView.post(()
-> layoutManager.scrollToPosition(MainActivity.currentPosition));
}
}
});
Here is the article, and you will also find the project on GitHub.
I want to achieve the following abilities:
Select only one child View inside a GridLayout each time by long clicking it.
A click on the GridLayout or any ancestor parent in the visual hierarchy will deselected selected child View if one already selected.
The problem is when when registering a View.OnLongClickListener callback to child View, neither parent GridLayout nor any ancestor registered callbacks (either View.OnClickListener or View.onTouchEvent) called when clicking on them.
How can I get a selected child inside a GridLayout similar to either AdapterView.OnItemSelectedListener or AdapterView.OnItemLongClickListener and solve the above mentioned problem?
What about storing a "selected" view as a global variable, and removing it when its focus changes? By playing with focusable, focusableInTouchMode and onClick listeners, you could have the right results. I'm not sure that's the best solution, but it works.
What you will need:
A global View variable: the GridLayout's child long clicked, as selected.
(optional) A custom parent container as any ViewGroup: it will set the focusable listeners on all its children [*]. In my tests, I used a LinearLayout and a RelativeLayout.
[*] If you don't use the optional parent custom Class, you have to set android:focusable="true" and android:focusableInTouchMode="true" on all children of the parent ViewGroup. And you'll have to set OnClickListener in order to call removeViewSelected() when the parent ViewGroup is clicked.
Adding Click listeners for GridLayout children: which updates the selected view.
Implementing a Focus listener: which removes the selected view if it's losing focus.
It will handle all focus change state on parent and child hierarchy, see the output:
I used the following pattern:
CoordinatorLayout --- simple root group
ParentLayout --- aka "parentlayout"
Button --- simple Button example
GridLayout --- aka "gridlayout"
FloattingActionButton --- simple Button example
Let's preparing the selected View and its update methods in the Activity:
private View selectedView;
...
private void setViewSelected(View view) {
removeViewSelected();
selectedView = view;
if (selectedView != null) {
// change to a selected background for example
selectedView.setBackgroundColor(
ContextCompat.getColor(this, R.color.colorAccent));
}
}
private View getViewSelected() {
if (selectedView != null) {
return selectedView;
}
return null;
}
private void removeViewSelected() {
if (selectedView != null) {
// reset the original background for example
selectedView.setBackgroundResource(R.drawable.white_with_borders);
selectedView = null;
}
// clear and reset the focus on the parent
parentlayout.clearFocus();
parentlayout.requestFocus();
}
On each GridLayout child, add the Click and LongClick listeners to update or remove the selected view. Mine were TextViews added dynamically, but you could easily create a for-loop to retrieve the children:
TextView tv = new TextView(this);
...
gridlayout.addView(tv);
tv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeViewSelected();
}
});
tv.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
setViewSelected(view);
return true;
}
});
Set the FocusChange listener on the parent container:
parentlayout.setOnFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View view, boolean hasFocus) {
View viewSelected = getViewSelected();
// if the selected view exists and it lost focus
if (viewSelected != null && !viewSelected.hasFocus()) {
// remove it
removeViewSelected();
}
}
});
Then, the optional custom ViewGroup: it's optional because you could set the focusable state by XML and the clickable listener dynamically, but it seems easier to me. I used this following custom Class as parent container:
public class ParentLayout extends RelativeLayout implements View.OnClickListener {
public ParentLayout(Context context) {
super(context);
init();
}
public ParentLayout(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public ParentLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
// handle focus and click states
public void init() {
setFocusable(true);
setFocusableInTouchMode(true);
setOnClickListener(this);
}
// when positioning all children within this
// layout, add their focusable state
#Override
protected void onLayout(boolean c, int l, int t, int r, int b) {
super.onLayout(c, l, t, r, b);
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
child.setFocusable(true);
child.setFocusableInTouchMode(true);
}
// now, even the Button has a focusable state
}
// handle the click events
#Override
public void onClick(View view) {
// clear and set the focus on this viewgroup
this.clearFocus();
this.requestFocus();
// now, the focus listener in Activity will handle
// the focus change state when this layout is clicked
}
}
For example, this is the layout I used:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout ...>
<com.app.ParentLayout
android:id="#+id/parent_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal">
<Button
android:id="#+id/sample_button"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:text="A Simple Button"
android:layout_marginTop="20dp"
android:layout_marginBottom="20dp"/>
<android.support.v7.widget.GridLayout
android:id="#+id/grid_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:layout_above="#id/sample_button" .../>
</com.app.ParentLayout>
<android.support.design.widget.FloatingActionButton .../>
</android.support.design.widget.CoordinatorLayout>
Hope this will be useful.
Use the following code :
int last_pos = -1;
GridLayout gridLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gridLayout = (GridLayout) findViewById(R.id.gridLayout);
int child_count = gridLayout.getChildCount();
for(int i =0;i<child_count;i++){
gridLayout.getChildAt(i).setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
//Deselect previous
if(last_pos!=-1) gridLayout.getChildAt(last_pos).setSelected(false);
//Select the one you clicked
view.setSelected(true);
last_pos = gridLayout.indexOfChild(view);
return false;
}
});
}
//Remove focus if the parent is clicked
gridLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
gridLayout.getChildAt(last_pos).setSelected(false);
}
});
I want to make a slideshow of numbers starting from 0 to 9 in pictures. When i click next button , show the picture of 1 and play sound as 'one' and so on.I want previous button to properly work.. like when I click previous button then go to previous pic and play sound which is related to that pic.
public class Numbers extends Activity {
int i = 1;
private ImageView iv;
Button next;
Button previous;
MediaPlayer ourSong;
private int currentImage = 0;
public int currentAudio = 0;
int[] images = { R.drawable.p1, R.drawable.p2, R.drawable.p3,
R.drawable.p4, R.drawable.p5, R.drawable.p6, R.drawable.p7,
R.drawable.p8, R.drawable.p9, R.drawable.p10};
int[] audios = { R.raw.a1, R.raw.a2, R.raw.a3, R.raw.a4, R.raw.a5,
R.raw.a6, R.raw.a7, R.raw.a8, R.raw.a9, R.raw.a10};
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.nextpre);
iv = (ImageView) findViewById(R.id.ivn);
next = (Button) findViewById(R.id.buttonn);
previous = (Button) findViewById(R.id.buttonp);
// Just set one Click listener for the image
next.setOnClickListener(iButtonChangeImageListener);
previous.setOnClickListener(gButtonChangeImageListener);
}
View.OnClickListener iButtonChangeImageListener = new View.OnClickListener() {
public void onClick(View v) {
try {
// Increase Counter to move to next Image
currentImage++;
currentImage = currentImage % images.length;
iv.setImageResource(images[currentImage]);
ourSong = MediaPlayer.create(Numbers.this,
audios[currentAudio+1]);
ourSong.start();
currentAudio++;
} catch (Exception e) {
}
}
};
View.OnClickListener gButtonChangeImageListener = new View.OnClickListener() {
public void onClick(View v) {
try {
// Decrease Counter to move to previous Image
currentImage--;
currentImage = (currentImage + images.length) % images.length;
iv.setImageResource(images[currentImage]);
MediaPlayer.create(Numbers.this, audios[currentAudio]);
ourSong.start();
currentAudio--;
} catch (Exception e) {
}
}
};
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
ourSong.release();
finish();
}
#Override
protected void onStart() {
super.onStart();
ourSong = MediaPlayer.create(Numbers.this,
audios[0]);
ourSong.start();
}
}
Hmm if you're trying to make a slide show, you might want to look into view pagers they look like this:
View pagers are highly customizable, You can add buttons and images and pretty much almost anything a fragment can hold on each screen. Not sure what your skill level is but ill tell you whats involved in getting this to work.
Create a layout with a view pager in it.
Create a class that extends the FragmentPagerAdapter
Override getItem() method in the adapter (this is where you define your different "screens"
Create a class that extends fragment for each screen you want to show your users.
Doing it this way in order to switch screens u just have to call setCurrentItem to change pages (when user clicks next or prev)
--edit--
Apparently theres also a something called an ImageSwitcher.
They look like this:
This is actually better for your case since you only want images. It looks a lot easier to implement than a view pager. This describes how to implement it: http://www.tutorialspoint.com/android/android_imageswitcher.htm
In my layout I have a GridView containing 4 custom ImageViews. I'm setting GridView's visibility to invisible until all ImageViews are resized at first but when the GridView is shown, there's a short blink with ImageViews still unchanged.
blink for a split second
views are resized in a moment
Each ImageView creates separate listener in order to scale its size:
//Setting new params as half of parent's size and increasing counter
if (getViewTreeObserver().isAlive()) {
final ViewTreeObserver viewTreeObserver = getViewTreeObserver();
viewTreeObserver.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
#Override
public boolean onPreDraw() {
getViewTreeObserver().removeOnPreDrawListener(this);
View parent = (View) getParent();
int dimension = Math.min(parent.getWidth(), parent.getHeight()) / 2;
mThisImageView.setLayoutParams(new AbsListView.LayoutParams(dimension, dimension));
ResizeCounter.setCounter(ResizeCounter.getCounter() + 1);
return true;
}
});
}
//Activity listens to the moment when all ImageViews have been resized
ResizeCounter.addCounterListener(new OnResizeCounterChangeListener() {
#Override
public void onResizeCounterChanged() {
if (ResizeCounter.getCounter() == 4) {
mAnswerGridView.setVisibility(View.VISIBLE);
}
}
});
I've also tried to resize them in onGlobalLayout method (same result) and to override onMeasure method (parent View is still null at this point).
I suspect that it's too late to change views in onPreDraw() but is there a method that can be called earlier inside which I can be sure that all views have been measured?
Try to call mAnswerGridView.requestLayout() before mAnswerGridView.setVisibility(View.VISIBLE);
This may not work because as it's stated at Android Developers
This will schedule a layout pass of the view tree.
So you may better force relayout:
relayoutChildren(View view) {
view.measure(
View.MeasureSpec.makeMeasureSpec(view.getMeasuredWidth(), View.MeasureSpec.EXACTLY),
View.MeasureSpec.makeMeasureSpec(view.getMeasuredHeight(), View.MeasureSpec.EXACTLY));
view.layout(view.getLeft(), view.getTop(), view.getRight(), view.getBottom()); }
I've created a handler that schedules setting visibility right after calling requestLayout.
Works well in this case.
ResizeCounter.addCounterListener(new OnResizeCounterChangeListener() {
#Override
public void onResizeCounterChanged() {
if (ResizeCounter.getCounter() == 4) {
mAnswerGridView.requestLayout();
Handler handler = new Handler();
handler.post(new Runnable() {
#Override
public void run() {
mAnswerGridView.setVisibility(View.VISIBLE);
}
});
}
}
});
First of all, thanks in advance for any help you can provide. This has been driving me nuts and google's been no friend of mine for this.
I've created a DrawView so the user can paint something in the app. What I'd like to do is place that DrawView within a layout XML file, so I can place a TextView title on the top and two buttons on the bottom, one of which will save what the user painted as an image file. So far, all I've been able to do is create an area for the user to paint in. Is there any way to place this DrawView view into an XML file? If not, what alternative solutions do I have?
Also, this is an optional question as I'm sure I'll find the solution by googling, at some point, but is there a better way to smoothly draw along the user's finger movement, other than the canvas.drawLine() method I am currently using?
public class Draw extends Activity {
DrawView drawView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set full screen view
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
drawView = new DrawView(this);
setContentView(drawView);
drawView.requestFocus();
}
}
public class DrawView extends View implements OnTouchListener {
private static final String TAG = "DrawView";
ArrayList <Float> nikpointx = new ArrayList<Float>();
ArrayList <Float> nikpointy = new ArrayList<Float>();
Bitmap nikbmp;
Paint paint = new Paint();
public DrawView(Context context) {
super(context);
setFocusable(true);
setFocusableInTouchMode(true);
this.setOnTouchListener(this);
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
paint.setStrokeWidth(4);
}
#Override
public void onDraw(Canvas canvas) {
//I'm doing this, because the drawCircle method places circles at different points
//in the screen, rather than drawing smooth lines. I haven't found a more elegant
//solution yet :-(
canvas.drawLine(nikpointx.get(i-1), nikpointy.get(i-1), nikpointx.get(i), nikpointy.get(i), paint);
canvas.setBitmap(nikbmp);
}
}
public boolean onTouch(View view, MotionEvent event) {
// if(event.getAction() != MotionEvent.ACTION_DOWN)
// return super.onTouchEvent(event);
Point point = new Point();
point.x = event.getX();
point.y = event.getY();
points.add(point);
invalidate();
Log.d(TAG, "point: " + point);
nikpointx.add(event.getX());
nikpointy.add(event.getY());
return true;
}
}
You can place you custom view in the xml layout like this:
<full.package.to.customview.DrawView android:id="#+id/idOfCustom"
//other attributes
/>
You can also add custom attributes to your view to set directly from the xml file.
I don't have any solutions for your second problem.
edit: after a quick search on this site i found this -> Android How to draw a smooth line following your finger