How to Implement Line-Breaking Layout for Widgets in Android?

Line-Breaking Widget Layout for Android

Issue:

In an Android application, you may have data that can be divided into widgets, each representing a word. To display this data, you want to arrange the widgets in lines, similar to a text paragraph, allowing them to wrap to the next line when necessary.

Proposed Solution:

Implement a custom layout known as PredicateLayout that mimics the line-breaking behavior of text. This layout manages child views by arranging them in lines, wrapping when the end of the line is reached.

Code Sample:

public class PredicateLayout extends ViewGroup {
    private int line_height;

    // ...

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // ...
        for (int i = 0; i < count; i++) {
            // ...
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            // ...
            line_height = Math.max(line_height, child.getMeasuredHeight() + lp.height);
            // ...
        }
        this.line_height = line_height;
        // ...
    }

    // ...
}

Usage:

Within an activity, you can use this custom layout as follows:

public class MyActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        // ...
        PredicateLayout l = new PredicateLayout(this);
        // ...
        setContentView(l);
    }
}

Result:

The PredicateLayout effectively arranges the widgets in lines, wrapping to the next line when the width constraint is exceeded. This allows for the display of data as wrapped text-like paragraphs.

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