I'm extending SeekBar:
public class NutritionalSeekBar extends SeekBar implements SeekBar.OnSeekBarChangeListener {
public NutritionalSeekBar(Context context) {
super(context);
}
public NutritionalSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
public NutritionalSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public NutritionalSeekBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
#Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
progress = (Math.round(progress / 50)) * 50;
seekBar.setProgress(progress);
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
}
Then use it in xml:
<com.package.views.NutritionalSeekBar
android:id="#+id/seek_bar_carbos"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:progress="50" />
Why the callback progress changed is never called?
If you want a NutritionalSeekBar instance to be its own OnSeekBarChangeListener, you have to set it as such. You should also chain your constructors. For example:
public class NutritionalSeekBar extends SeekBar implements SeekBar.OnSeekBarChangeListener {
public NutritionalSeekBar(Context context) {
this(context, null);
}
public NutritionalSeekBar(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public NutritionalSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
setOnSeekBarChangeListener(this);
}
...
}
Related
Following is my custom TextView Class:
public class MontTextView extends android.support.v7.widget.AppCompatTextView{
public MontTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public MontTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public MontTextView(Context context) {
super(context);
init();
}
public void init() {
Typeface tf = Typeface.createFromAsset(getContext().getAssets(), "fonts/Montserrat-Regular.ttf");
setTypeface(tf ,1);
}
}
And in XML I use it like this:
<com.minimalist.gorakh.customviews.MontTextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/_20sdp"
android:text="Text"
android:textColor="#fff"
android:textSize="#dimen/_25ssp"
app:layout_constraintBottom_toBottomOf="#+id/betaView"
app:layout_constraintStart_toStartOf="#+id/betaView"
app:layout_constraintTop_toTopOf="#+id/betaView" />
This is working in pre-lollipop(v-19) like this:
And on a marshmallow emulator:
I copied the custom TextView code from a previous project, but couldn't get what am I doing wrong here.
Try this :
import android.widget.*;
import android.util.*;
import android.content.*;
import android.graphics.*;
public class MontTextView extends TextView{
public MontTextView (Context context) {
super(context);
init();
}
public MontTextView (Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public MontTextView (Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/Montserrat-Regular.ttf"));
}
}
i created simple widget as custom checkBox as this below code, in this code setting custom font work fine but i can't check or uncheck CheckBox
public class CustomFontCheckBox extends AppCompatCheckBox {
public CustomFontCheckBox(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setTypeface(FontManager.getInstance(getContext()).loadFont("fonts/my_font.ttf"));
}
public CustomFontCheckBox(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
#SuppressWarnings("unused")
private void internalInit(Context context, AttributeSet attrs) {
}
}
xml layout:
<com.myapp.test.Widgets.CustomFontCheckBox
android:id="#+id/ch1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="#dimen/sickness_depth_marginRight"
android:button="#null"
android:buttonTint="#color/colorAccent"
android:drawableRight="?android:attr/listChoiceIndicatorMultiple"
android:text="#string/diabetes"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#color/body_text_color"/>
Well I think you are messing with its constructor and its style use it like this
public class CustomFontCheckBox extends AppCompatCheckBox {
public CustomFontCheckBox(Context context) {
super(context);
init();
}
public CustomFontCheckBox(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public CustomFontCheckBox(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init(){
//set your typeface here.
// setTypeface("");
}
}
I am trying to subclass TextInputLayout, in a CustomTextInputLayout. This is the code:
public class CustomTextInputLayout extends TextInputLayout {
public CustomTextInputLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomTextInputLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public CustomTextInputLayout(Context context) {
super(context);
}
public View getComponent(){
return this.getChildAt(0);
}
public void setHint(String hint){
super.setHint(hint);
}
}
I am using it to wrap another custom component, with a button and an EditText:
public class ComponentesSeleccion extends RelativeLayout {
private EditText editText;
private Button button;
public ComponentesSeleccion(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public ComponentesSeleccion(Context context) {
super(context);
inicializar();
}
public ComponentesSeleccion(Context context, AttributeSet attrs) {
super(context, attrs);
inicializar();
}
private void inicializar() {
String infService = Context.LAYOUT_INFLATER_SERVICE;
LayoutInflater li =
(LayoutInflater)getContext().getSystemService(infService);
li.inflate(R.layout.seleccionlayout, this, true);
editText=(EditText)findViewById(R.id.editText);
button=(Button)findViewById(R.id.button2);
}
public Button getButton() {
return button;
}
public EditText getEditText() {
return editText;
}
public void setInputType(int type){
editText.setInputType(type);
}
public void setImagen(Drawable drawable){
button.setBackgroundDrawable(drawable);
}
}
With this, I am not able to do in my code:
CustomTextInputLayout ctil=(CustomTextInputLayout)view.findViewById(R.id.ctil);
ctil.setHint(“a hint");
No exception, no errors, but the hint is not drawn. i can set the normal hint on the EditText, but I want the animated hint of the TextInputLayout.
How could I get it working?
Thank you.
How can i use Picasso library to load image from web to button background image ? is it possible ? i use this code to load image on imageView
Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);
But i dont know how to use this library with button view.
public class MyButton extends Button implements Target {
public MyButton(Context context) {
super(context);
}
public MyButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public MyButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
#Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
setBackgroundDrawable(new BitmapDrawable(bitmap));
}
#Override
public void onBitmapFailed(Drawable errorDrawable) {
}
#Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
}
And
MyButton myButton = (MyButton) findViewById(R.id.btn);
Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(myButton);
I'm trying something like this
public class CustomViewSubclass extends HorizontalScrollView{
private LinearLayout layout;
public CustomViewSubclass(Context context) {
this(context,null,0);
}
public CustomViewSubclass(Context context, AttributeSet attrs) {
this(context,attr,0);
}
public CustomViewSubclass(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
layout = new LinearLayout(context);
}
// This is called from the `Activity`
public void startAsyncTask() { // code }
// This method is called in the `onPostExecute()` of an `AsyncTask` subclass
public void doSomething(Context context) {
ImageView image = ImageView(context);
layout.addView(image); // NullPointerException here, layout seems to be null
}
but it seems that layout on doSomething() is null. How is that even possible? I'm initializing it on the constructor... and I never re-initialize it again;
I'm adding my custom view via XML
<com.mypackage.CustomViewSubclass
android:layout_width="wrap_content"
android:layout_width="match_parent" />
Ok I fixed it, it was an stupid mistake made by me:
I used super() on the 3 methods, instead of using this().
public CustomViewSubclass(Context context) {
super(context,null,0);
}
public CustomViewSubclass(Context context, AttributeSet attrs) {
super(context,attr,0);
}
public CustomViewSubclass(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
layout = new LinearLayout(context);
}
Solution:
public CustomViewSubclass(Context context) {
this(context,null,0);
}
public CustomViewSubclass(Context context, AttributeSet attrs) {
this(context,attr,0);
}
public CustomViewSubclass(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
layout = new LinearLayout(context);
}