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ID of the child views in a custom view are same in Android


ID of the child views in a custom view are same in Android

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ID of the child views in a custom view are same in Android
Tag : android , By : Stephen Dewar
Date : January 11 2021, 05:14 PM

Any of those help I have a custom view ValueSelectorView which contains two buttons to increment and decrement value and an EditText to display that value. In my activity, I am using this view three times. My concern here is with the child views that their id is always the same when checked in logs. Due to this, the resultant value comes out to be incorrect. , For others, who are facing the same issue.
My updated code is:
package eu.siacs.conversations.ui.widget;

import android.content.Context;
import android.content.res.TypedArray;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.Log;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;

import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;

import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;

public class ValueSelectorView extends RelativeLayout {

    View rootView;
    EditText valueTextView;
    View minusButton;
    View plusButton;
    private int customState;

    private int minValue = Integer.MIN_VALUE;
    private int maxValue = Integer.MAX_VALUE;

    public ValueSelectorView(Context context) {
        super(context);
        init(context, null);
    }

    public ValueSelectorView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    public ValueSelectorView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public ValueSelectorView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        rootView = LayoutInflater.from(context).inflate(R.layout.value_selector, this, true);
        Log.i(Config.LOGTAG, "****view testr**** id of this view is -->" + getResources().getResourceEntryName(rootView.getId()));
        valueTextView = rootView.findViewById(R.id.valueTextView);

        minusButton = rootView.findViewById(R.id.minusButton);
        plusButton = rootView.findViewById(R.id.plusButton);

        minusButton.setOnClickListener(v -> decrementValue());

        plusButton.setOnClickListener(v -> incrementValue());

        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ValueSelectorView,0,0);
        int defaultVaue = typedArray.getInt(R.styleable.ValueSelectorView_defaultValue,0);
        Log.i(Config.LOGTAG, "****view testr**** id of this TextView is 0 -->" + valueTextView.getId());
//        Log.i(Config.LOGTAG, "****view testr**** id of this Minus Button is 0 -->" + minusButton.getId());
//        Log.i(Config.LOGTAG, "****view testr**** id of this Add Button is 0 -->" + plusButton.getId());
        valueTextView.setText(String.valueOf(defaultVaue));

        typedArray.recycle();
    }

    public void setDefaultValue(int value) {
        valueTextView.setText(String.valueOf(value));
    }

    public int getMinValue() {
        return minValue;
    }

    public void setMinValue(int minValue) {
        this.minValue = minValue;
    }

    public int getMaxValue() {
        return maxValue;
    }

    public void setMaxValue(int maxValue) {
        this.maxValue = maxValue;
    }

    public int getValue() {
        return Integer.valueOf(valueTextView.getText().toString());
    }

    /*public void setValue(int newValue) {
        int value = newValue;
        if(newValue < minValue) {
            value = minValue;
        } else if (newValue > maxValue) {
            value = maxValue;
        }
        Log.i(Config.LOGTAG, "****view testr**** id of this TextView is 1 -->" + valueTextView.getId());
        valueTextView.setText(String.valueOf(value));
    }*/

    @Override
    public void addView(View child, int index, ViewGroup.LayoutParams params) {
        super.addView(child, index, params);
    }

    private void incrementValue() {

        int currentVal = Integer.valueOf(valueTextView.getText().toString());
        if(currentVal < maxValue) {
            Log.i(Config.LOGTAG, "****view testr**** id of this TextView is 2-->" + valueTextView.getId());
            valueTextView.setText(String.valueOf(currentVal + 1));
        }
    }

    private void decrementValue() {
        int currentVal = Integer.valueOf(valueTextView.getText().toString());
        if(currentVal > minValue) {
            Log.i(Config.LOGTAG, "****view testr**** id of this TextView is 3-->" + valueTextView.getId());
            valueTextView.setText(String.valueOf(currentVal - 1));
        }
    }

    public void setCustomState(int customState) {
        this.customState = customState;
    }

    @Override
    protected Parcelable onSaveInstanceState() {
        Parcelable superState = super.onSaveInstanceState();
        SavedState ss = new SavedState(superState);
        ss.value = valueTextView.getText().toString();
        return ss;
    }

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        SavedState ss = (SavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());
        valueTextView.setText(ss.value);
    }

    public static class SavedState extends BaseSavedState {
        String value;

        SavedState(Parcelable superState) {
            super(superState);
        }

        public SavedState(Parcel source) {
            super(source);
            value = source.readString();
        }

        @Override
        public void writeToParcel(Parcel dest, int flags) {
            super.writeToParcel(dest, flags);
            dest.writeString(value);
        }

        public static final Parcelable.Creator<SavedState> CREATOR =
                new Parcelable.Creator<SavedState>() {
                    public SavedState createFromParcel(Parcel in) {
                        return new SavedState(in);
                    }

                    public SavedState[] newArray(int size) {
                        return new SavedState[size];
                    }
                };
    }
}

<EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="@dimen/medium_font"
        android:enabled="false"
        android:background="@null"
        android:textColor="#000000"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@id/minusButton"
        android:saveEnabled="false"
        android:id="@+id/valueTextView" />

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Tag : android , By : geo
Date : March 29 2020, 07:55 AM
Hope that helps I found this straight after asking, so decided to post anyway in case someone has the same issue. To draw over child views in a Gallery, overwrite dispatchDraw instead of onDraw
@Override
protected void dispatchDraw(Canvas canvas) {
    super.dispatchDraw(canvas);
    canvas.drawPath(mPath,mPaint);
}

Trying to detect child views in the onTouchEvent in a custom view


Tag : android , By : lamberms
Date : March 29 2020, 07:55 AM
This might help you Instead of adding the touch listener to each star, try adding to your custom view (i.e., relativelayout).
Then in the onTouch callback, add your existing logic to change the color.

Custom view that splits layout diagonally with different child views


Tag : android , By : zac
Date : March 29 2020, 07:55 AM
this one helps. The easiest approach is to just make a background image with that skewed cut. If you wish to have a dynamic layout and you want to really cut widgets, use Canvas.saveLayer/restore. Like this:
private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
private Xfermode pdMode = new PorterDuffXfermode(PorterDuff.Mode.CLEAR);
private Path path = new Path();

protected void dispatchDraw(Canvas canvas) {
    int saveCount = canvas.saveLayer(0, 0, getWidth(), getHeight(), null, Canvas.ALL_SAVE_FLAG);
    super.dispatchDraw(canvas);

    paint.setXfermode(pdMode);
    path.reset();
    path.moveTo(0, getHeight());
    path.lineTo(getWidth(), getHeight());
    path.lineTo(getWidth(), getHeight() - TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics()));
    path.close();
    canvas.drawPath(path, paint);

    canvas.restoreToCount(saveCount);
    paint.setXfermode(null);
}
<?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:layout_height="match_parent"
    android:orientation="vertical"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:showIn="@layout/activity_main">

    <com.example.marcin.splitlayout.CutLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <ImageView
            android:scaleType="centerCrop"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/mazda" />


    </com.example.marcin.splitlayout.CutLayout>

    <TextView
        android:layout_margin="16dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Mazda 3" />

</LinearLayout>

Why won't the child views of my custom view render in Marshmallow?


Tag : android , By : pacorro2000
Date : March 29 2020, 07:55 AM
hop of those help? Fixed by properly implementing OnMeasure and OnLayout for each custom view through the top-down approach suggested by Android documentation.

Android: Resizing custom views. Parent is resized but width/height changes not passed down to child view


Tag : android , By : CM.
Date : March 29 2020, 07:55 AM
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