I am getting the error: "Cannot resolve method 'super()'" in my code and I am not sure how to resolve this, do you have any clues?
The code is as follows:
public GeoView( double left, double top, double width )
{
super();
this.left = left;
this.top = top;
this.width = width;
this.transform = null;
this.backing_store = null;
this.sink = false;
this.last_size = new Rect(0, 0, 200, 200 );
this.do_tracking = false;
Drawable background = new Drawable() {
#Override
public void draw(Canvas canvas) {
}
#Override
public void setAlpha(int i) {
}
#Override
public void setColorFilter(ColorFilter colorFilter) {
}
#Override
public int getOpacity() {
return 0;
}
};
What is GeoView class? You extended it from another class?
If yes. Check that parent class have empty constructor, because you call it.
If it's your own class and it didn't extended from any other class. Then you don't need to call super().
View doesn't have empty constructor.
You should Have at least one of this constructor.
public GeoView(Context context) {
super(context);
}
public GeoView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public GeoView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
If you want to create view by yourself, you need first constructor. Then you have to
GeoView geoView = new GeoView(YourActivity.this);
Or you can simply add your view to layout. Then You second will be called constructor. I think you should add all of them.
<com.example.yourapp.GeoView
android:layout_height="300dp"
android:layout_width="match_parent"/>
Related
public class SwipeButton extends RelativeLayout {
private ImageView swipeButtonInner;
private float initialX;
private boolean active;
private TextView centerText;
private ViewGroup background;
private Drawable disabledDrawable;
private Drawable enabledDrawable;
private OnStateChangeListener onStateChangeListener;
private OnActiveListener onActiveListener;
private static final int ENABLED = 0;
private static final int DISABLED = 1;
private int collapsedWidth;
private int collapsedHeight;
private LinearLayout layer;
private boolean trailEnabled = false;
private boolean hasActivationState;
public SwipeButton(Context context) {
super(context);
init(context, null, -1, -1);
}
public SwipeButton(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs, -1, -1);
}
public SwipeButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs, defStyleAttr, -1);
}
#TargetApi(21)
public SwipeButton(Context context, AttributeSet attrs, int defStyleAttr, int
defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(context, attrs, defStyleAttr, defStyleRes);
}
public boolean isActive() {
return active;
}
public void setText(String text) {
centerText.setText(text);
}
public void setBackground(Drawable drawable) {
background.setBackground(drawable);
}
public void setSlidingButtonBackground(Drawable drawable) {
background.setBackground(drawable);
}
public void setDisabledDrawable(Drawable drawable) {
disabledDrawable = drawable;
if (!active) {
swipeButtonInner.setImageDrawable(drawable);
}
}
public void setButtonBackground(Drawable buttonBackground) {
if (buttonBackground != null) {
swipeButtonInner.setBackground(buttonBackground);
}
}
public void setEnabledDrawable(Drawable drawable) {
enabledDrawable = drawable;
if (active) {
swipeButtonInner.setImageDrawable(drawable);
}
}
public void setOnStateChangeListener(OnStateChangeListener
onStateChangeListener) {
this.onStateChangeListener = onStateChangeListener;
}
public void setOnActiveListener(OnActiveListener onActiveListener) {
this.onActiveListener = onActiveListener;
}
public void setInnerTextPadding(int left, int top, int right, int bottom) {
centerText.setPadding(left, top, right, bottom);
}
public void setSwipeButtonPadding(int left, int top, int right, int bottom) {
swipeButtonInner.setPadding(left, top, right, bottom);
}
public void setHasActivationState(boolean hasActivationState) {
this.hasActivationState = hasActivationState;
}
My XML:`
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:id="#+id/AnswerRelativeLayout"
android:layout_height="70dp"
android:orientation="vertical"
tools:context="com.example.dynamicobj.FragmentMain">
<com.example.dynamicobj.SwipeButton
android:id="#+id/test_btn"
android:layout_width="match_parent"
android:layout_height="70dp"
app:button_background="#drawable/shape_button"
app:button_image_disabled="#drawable/ic_launcher_background"
app:button_image_height="60dp"
app:button_image_width="100dp"
app:has_activate_state="true"
app:initial_state="disabled"
app:inner_text="Termine buchen"
app:inner_text_background="#drawable/shape_rounded"
app:inner_text_bottom_padding="18dp"
app:inner_text_right_padding="200dp"
app:inner_text_color="#android:color/black"
app:inner_text_size="16sp"
app:inner_text_top_padding="18dp" />
</LinearLayout>`
F
ragmentMain:
public class FragmentMain extends Fragment {
Context context;
View rootView;
public FragmentMain() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(false);
}
#Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_main, container, false);
LinearLayout layout = (LinearLayout)
rootView.findViewById(R.id.AnswerRelativeLayout);
SwipeButton button = new SwipeButton(getContext());
layout.addView(button);
return rootView;
}
}
So I got this custom SwipeButton class from Git (com.ebanx.swipebtn.SwipeButton). Now I want to create an Object from SwipeButton with a layout looking like the one from the xml file. Is there any method, where I just can give the new button the prefinished layout without having to use all these Methods in the SwipeButton class? I am going to create the buttons dynamically later on, but all being the same layout. Help pls?
you forgot to add LayoutParams to your button
use below code before adding button into layout
button.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT))
and set your LinearLayout height wrap_content not 70dp
I got a bunch of drawables that I want to load using fresco, I want to use wrap_content size for those images, how can I do it in xml with fresco? Or if xml is not possible how do you do it in code?
<com.facebook.drawee.view.SimpleDraweeView
android:id="#+id/myImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
fresco:placeholderImage="#mipmap/myImage"/>
The above code is not working unless I set a fixed size.
I am part of the Fresco team and I was the one who made the design decision to not support wrap-content. The rationale is explained in the documentation. But in short, the problem is that you can't guarantee that the image will be available immediately (you may need to fetch it first) and that means that the view size would have to change once the image arrives. This is in most cases not desirable and you should probably rethink your UI.
Anyways, if you really really need/want to do that, you can do it like this:
void updateViewSize(#Nullable ImageInfo imageInfo) {
if (imageInfo != null) {
draweeView.getLayoutParams().width = imageInfo.getWidth();
draweeView.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
draweeView.setAspectRatio((float) imageInfo.getWidth() / imageInfo.getHeight());
}
}
ControllerListener listener = new BaseControllerListener {
#Override
public void onIntermediateImageSet(String id, #Nullable ImageInfo imageInfo) {
updateViewSize(imageInfo);
}
#Override
public void onFinalImageSet(String id, #Nullable ImageInfo imageInfo, #Nullable Animatable animatable) {
updateViewSize(imageInfo);
}
};
DraweeController controller = draweeControllerBuilder
.setUri(uri)
.setControllerListener(listener)
.build();
draweeView.setController(controller);
I wrote this code from the top of my head, I haven't actually tested it. But the idea should be clear, and it should work with minor adjustments.
Based on #plamenko's answer, I made a custom view as follows:
/**
* Works when either height or width is set to wrap_content
* The view is resized based on the image fetched
*/
public class WrapContentDraweeView extends SimpleDraweeView {
// we set a listener and update the view's aspect ratio depending on the loaded image
private final ControllerListener listener = new BaseControllerListener<ImageInfo>() {
#Override
public void onIntermediateImageSet(String id, #Nullable ImageInfo imageInfo) {
updateViewSize(imageInfo);
}
#Override
public void onFinalImageSet(String id, #Nullable ImageInfo imageInfo, #Nullable Animatable animatable) {
updateViewSize(imageInfo);
}
};
public WrapContentDraweeView(Context context, GenericDraweeHierarchy hierarchy) {
super(context, hierarchy);
}
public WrapContentDraweeView(Context context) {
super(context);
}
public WrapContentDraweeView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public WrapContentDraweeView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public WrapContentDraweeView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
#Override
public void setImageURI(Uri uri, Object callerContext) {
DraweeController controller = ((PipelineDraweeControllerBuilder)getControllerBuilder())
.setControllerListener(listener)
.setCallerContext(callerContext)
.setUri(uri)
.setOldController(getController())
.build();
setController(controller);
}
void updateViewSize(#Nullable ImageInfo imageInfo) {
if (imageInfo != null) {
setAspectRatio((float) imageInfo.getWidth() / imageInfo.getHeight());
}
}
}
You can include this class in the XML, an example usage:
<com.example.ui.views.WrapContentDraweeView
android:id="#+id/simple_drawee_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
In Kotlin you can try something like this :
val listener = object : BaseControllerListener<ImageInfo>() {
override fun onFinalImageSet(id: String?, imageInfo: ImageInfo?, animatable: Animatable?) {
super.onFinalImageSet(id, imageInfo, animatable)
itemView.draweeGif.layoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT
itemView.draweeGif.aspectRatio = (imageInfo?.width?.toFloat() ?: 0.toFloat()) / (imageInfo?.height?.toFloat() ?: 0.toFloat())
}
}
val controller = Fresco.newDraweeControllerBuilder()
.setUri(uriGif)
.setControllerListener(listener)
.setAutoPlayAnimations(true)
.build()
itemView.draweeGif.controller = controller
For me it was a solution in my RecyclerView because I was looking to set the layoutParams directly in my ViewHolder.
Found a solution by extending SimpleDraweeView, it allows me to use wrap_content and it works just fine! How ever I prevent you from setting the size in setContentView and the preview is not working, I be glad if could edit this answer to fix those.
Usage
<com.gazman.WrapContentDraweeView
android:id="#+id/myImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
fresco:placeholderImage="#mipmap/myImage"/>
Source code
public class WrapContentDraweeView extends SimpleDraweeView {
private int outWidth;
private int outHeight;
public WrapContentDraweeView(Context context, GenericDraweeHierarchy hierarchy) {
super(context, hierarchy);
}
public WrapContentDraweeView(Context context) {
super(context);
}
public WrapContentDraweeView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public WrapContentDraweeView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context, attrs);
}
public WrapContentDraweeView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
if (attrs == null) {
return;
}
TypedArray gdhAttrs = context.obtainStyledAttributes(
attrs,
R.styleable.GenericDraweeView);
try {
int placeholderId = gdhAttrs.getResourceId(
R.styleable.GenericDraweeView_placeholderImage,
0);
if(placeholderId != 0){
if(isInEditMode()){
setImageResource(placeholderId);
}
else {
loadSize(placeholderId, context.getResources());
}
}
} finally {
gdhAttrs.recycle();
}
}
private void loadSize(int placeholderId, Resources resources) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(resources, placeholderId, options);
outWidth = options.outWidth;
outHeight = options.outHeight;
}
#Override
public void setLayoutParams(ViewGroup.LayoutParams params) {
params.width = outWidth;
params.height = outHeight;
super.setLayoutParams(params);
}
}
invoke updateWrapSize in onFinalImageSet
void updateWrapSize(#Nullable ImageInfo imageInfo) {
if (imageInfo != null) {
boolean wrapH = getLayoutParams().height == ViewGroup.LayoutParams.WRAP_CONTENT;
boolean wrapW = getLayoutParams().width == ViewGroup.LayoutParams.WRAP_CONTENT;
if (wrapH || wrapW) {
if (wrapW && !wrapH) {
getLayoutParams().width = (int) (imageInfo.getWidth() * (float) getLayoutParams().height / imageInfo.getHeight());
} else if (wrapH && !wrapW) {
getLayoutParams().height = (int) (imageInfo.getHeight() * (float) getLayoutParams().width / imageInfo.getWidth());
} else {
getLayoutParams().width = ViewGroup.LayoutParams.WRAP_CONTENT;
getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
}
setAspectRatio((float) imageInfo.getWidth() / imageInfo.getHeight());
}
}
}
I have this code in activity:
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final MyNumberPicker np = new MyNumberPicker(this);
np.setOnScrollListener(new NumberPicker.OnScrollListener() {
#Override
public void onScrollStateChange(NumberPicker view, int scrollState) {
if (scrollState == NumberPicker.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL){
np.setBottomFadingEdgeStrength(0.9f);
np.setBottomFadingEdgeStrength(0.9f);
} else if (scrollState == NumberPicker.OnScrollListener.SCROLL_STATE_IDLE){
np.setBottomFadingEdgeStrength(1.0f);
np.setBottomFadingEdgeStrength(1.0f);
}
//also you can handle SCROLL_STATE_FLING if you want
}
});
}
}
And this code for my custom class:
public class MyNumberPicker extends NumberPicker {
private float bottomFadingEdgeStrength = 1.0f;
private float topFadingEdgeStrength = 1.0f;
public MyNumberPicker(Context context) {
super(context);
}
public MyNumberPicker(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyNumberPicker(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected float getBottomFadingEdgeStrength() {
return bottomFadingEdgeStrength;
}
#Override
protected float getTopFadingEdgeStrength() {
return topFadingEdgeStrength;
}
void setTopFadingEdgeStrength(float strength){
topFadingEdgeStrength = strength;
}
void setBottomFadingEdgeStrength(float strength){
bottomFadingEdgeStrength = strength;
}
}
The thing is that I don't know how to add this number picker into activity. In other words, I can't get it to work in my program. So how should I change my code in activity to do this.
As far as I can tell, I can't use findViewById(R.id.numberpicker1). Please help.
In your layout, instead using adding a NumberPicker like you normally would:
<NumberPicker android:id="#+id/numberpicker1" ... />
You would use a tag that points to your custom class.
<your.path.to.MyNumberPicker android:id="#+id/numberpicker1" ... />
So, if you added this to your activity_main layout, you could initialize it using View.findViewById:
setContentView(R.layout.activity_main);
final MyNumberPicker np = (MyNumberPicker) findViewById(R.id.numberpicker1);
i just read this How can I add an image on EditText and want to know if it is possible to add action on the icon when clicked...
yes it's possible just create CustomEediTtext extends from EditText. check this solution
Create a customized EditText class CustomEditText.java:
public class CustomEditText extends EditText {
private Drawable dRight;
private Rect rBounds;
public CustomEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public CustomEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomEditText(Context context) {
super(context);
}
#Override
public void setCompoundDrawables(Drawable left, Drawable top,
Drawable right, Drawable bottom) {
if(right !=null)
{
dRight = right;
}
super.setCompoundDrawables(left, top, right, bottom);
}
#Override
public boolean onTouchEvent(MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_UP && dRight!=null) {
rBounds = dRight.getBounds();
final int x = (int)event.getX();
final int y = (int)event.getY();
if(x>=(this.getRight()-rBounds.width()) && x<=(this.getRight()-
this.getPaddingRight()) && y>=this.getPaddingTop() && y<=(this.getHeight()-
this.getPaddingBottom())) {
//System.out.println("touch");
this.setText("");
event.setAction(MotionEvent.ACTION_CANCEL);//use this to prevent the keyboard
}
}
return super.onTouchEvent(event);
}
#Override
protected void finalize() throws Throwable {
dRight = null;
rBounds = null;
super.finalize();
}
}
I want to do a custom horizontal navigation bar, which consists of as many dots as i have pages.
My thoughts are:
Create a Custom ListView
Create Class Dot extends from View
Add all these dots to the custom listview dynamically..
Is this right to do so?
EDIT:
public class NavigationBarLesson extends LinearLayout {
private LessonConfig config = LessonConfig.getInstance();
private ArrayList<NavigationCircle> navigationCircles;
private int pageCount;
public NavigationBarLesson(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public NavigationBarLesson(Context context) {
super(context);
init(context);
}
private void init(Context context) {
Log.i("init","yes");
pageCount = config.getLektionCount();
navigationCircles = new ArrayList<NavigationCircle>();
for(int i=0; i < pageCount; i++){
this.addView(new NavigationCircle(context));
}
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = View.MeasureSpec.getSize(widthMeasureSpec);
int height = View.MeasureSpec.getSize(heightMeasureSpec);
setMeasuredDimension(width, height);
}
}
public class NavigationCircle extends ImageView{
private static Bitmap img;
private Bitmap activeImg;
public NavigationCircle(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public NavigationCircle(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public NavigationCircle(Context context) {
super(context);
init();
}
public void init() {
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(0, 0, 5, 0);
this.setLayoutParams(lp);
this.setBackgroundResource(R.drawable.upcoming_pages);
}
public Bitmap getImg() {
return img;
}
public Bitmap getActiveImg() {
return this.activeImg;
}
}
Well, I do not see why you would need a ListView. Create a horizontal LinearLayout with some simple views like TextView's or ImageView's etc added dynamically to the LinearLayout.