Cannot Wrap Blockquote-like Textview Of Arbitrary Line Count By Width

I need to render a quote block of arbitrary length. The text must be aligned to the left, while the block itself aligned to the right, similar to this one: For that I'm trying a T

Solution 1:

OK, after some examination of TextView's code I put together the solution that does what I need:

package com.actinarium.persistence.common;

import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.text.Layout;
import android.util.AttributeSet;
import android.widget.TextView;

publicclassBlockquoteTextViewextendsTextView {
    publicBlockquoteTextView(Context context) {
        super(context);
    }

    publicBlockquoteTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    publicBlockquoteTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)publicBlockquoteTextView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @OverrideprotectedvoidonMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        // Now fix widthfloatmax=0;
        Layoutlayout= getLayout();
        for (inti=0, size = layout.getLineCount(); i < size; i++) {
            finalfloatlineWidth= layout.getLineMax(i);
            if (lineWidth > max) {
                max = lineWidth;
            }
        }

        finalintheight= getMeasuredHeight();
        finalintwidth= (int) Math.ceil(max) + getCompoundPaddingLeft() + getCompoundPaddingRight();

        setMeasuredDimension(width, height);
    }
}

The default implementation of onMeasure does not take line widths into account unless they are broken down by \n's (code). I used getLineMax instead of getLineWidth because the latter measured trailing whitespace — the culprit of misalignment in block #3 in the original post.

Solution 2:

I am not sure of this but may work try adding dummy views with weight like this

<LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:weightSum="100"android:orientation="horizontal"><Viewandroid:layout_height="wrap_content"android:layout_weight="50"android:layout_width="0dp"/><TextViewandroid:layout_width="0dp"android:layout_weight="50"android:layout_height="wrap_content"android:layout_gravity="end"android:textAppearance="@style/TextAppearance.AppCompat.Body1"android:lineSpacingExtra="3.5dp"android:paddingLeft="24dp"android:layout_marginRight="24dp"android:text="Raw persistence may be the only option other than giving up entirely."
            /></LinearLayout>

I have never tested this so give it a try...