Develop Reference

set image dynamically to the custom imageview class android

I want to load the url into ImageView and that url is dynamic, so I created the custom Imageview class like this
public class CustomLocalCurrencyImageViewWhiteColor extends AppCompatImageView {
public CustomLocalCurrencyImageViewWhiteColor(Context context) {
super(context);
Glide.with(context).load(SessionManager.getCountryWiseDataObject(context).getCurrencyImageWhite()).into(this);
}
public CustomLocalCurrencyImageViewWhiteColor(Context context, AttributeSet attrs) {
super(context, attrs);
Glide.with(context).load(SessionManager.getCountryWiseDataObject(context).getCurrencyImageWhite()).into(this);
}
public CustomLocalCurrencyImageViewWhiteColor(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
Glide.with(context).load(SessionManager.getCountryWiseDataObject(context).getCurrencyImageWhite()).into(this);
}
}
.Its working fine when I used it the following way
<com.kiran.example.ebitcoin.customview.CustomLocalCurrencyImageViewWhiteColor
android:id="#+id/img"
android:layout_width="#dimen/imageSizeTooSmallBTCLogo"
android:layout_height="#dimen/imageSizeTooSmallBTCLogo"
android:layout_gravity="center_vertical" />
Now, I want to change the image resource of this custom image too, dynamically, So I tried
CustomLocalCurrencyImageViewWhiteColor img = findViewById(R.id.img);
img.setImageResource(R.drawable.ic_bitcoin_24_white);
But unfortunately, nothing is changed. How to change the image of custom image view class dynamically?? Any one found answer of this?

Finally , I got answer of my own question. I follow this, and done the code by following way.
public class CustomLocalCurrencyImageViewWhiteColor extends AppCompatImageView {
Context context;
public CustomLocalCurrencyImageViewWhiteColor(Context context) {
super(context);
Glide.with(context).load(SessionManager.getCountryWiseDataObject(context).getCurrencyImageWhite()).into(this);
}
public CustomLocalCurrencyImageViewWhiteColor(Context context, AttributeSet attrs) {
super(context, attrs);
Glide.with(context).load(SessionManager.getCountryWiseDataObject(context).getCurrencyImageWhite()).into(this);
}
public CustomLocalCurrencyImageViewWhiteColor(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
Glide.with(context).load(SessionManager.getCountryWiseDataObject(context).getCurrencyImageWhite()).into(this);
}
public void setImageWithGlide(Context context, Integer resId) {
this.context = context;
Glide.with(context).load("").placeholder(resId).into(this);
}
}
To change the image dynamically,
CustomLocalCurrencyImageViewWhiteColor img = findViewById(R.id.img);
img.setImageWithGlide(this, R.drawable.image);

As you are extending AppCompatImageView you can do as following:
Drawable drawable = AppCompatDrawableManager.get().getDrawable(getApplicationContext(), R.drawable.ic_bitcoin_24_white);
img.setImageResource(drawable);

Well u already use Glide in the first place, so try do it this way:
create setImageWithGlide method in CustomLocalCurrencyImageViewWhiteColor
public void setImageWithGlide(Context context, String imagePath) {
Glide.with(context).load(imagePath).into(this)
}
public void setImageWithGlide(Context context, Integer resId) {
Glide.with(context).load(resId).into(this)
}
you can use it like this:
img.setImageWithGlide(imagePath);
or if u use resourceId
img.setImageWithGlide(R.drawable.image);

Android custom checkbox for set custom font

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("");
}
}

in custom TextInputLayout, setHint() is not working

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.

Why progress changed is not called?

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);
}
...
}

Custom View subclass lose references

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);
}