如何更改进度条的大小（宽度和高度）以适合所有线性布局？

Question

I would like to add an unknown amount of progressbar to a linearlayout. (Like Whatsapp Status, and Instagram Stories) I can add progressbar to the linearlayout but the progressbar just shows max 7 progressbar.

My code so far:

while (i < 10){
    i ++;
    View child = getLayoutInflater().inflate(R.layout.stories_progress, null);
    linearLayout.addView(child);
}

I would like to shrink the size of the progressbar programmatically, so when I have 2 progressbar, they fill the layout with 50%/50%, when 5, 10 or even 20 progressbar, they become smaller, all of them will be displayed on linearlayout I tried to get the current width of the linearlayout and divide by the number of progressbars, but the width of the linearlayout returns always 0;

My xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/linear_layout_id"
    android:layout_width="match_parent"
    android:layout_height="30dp"
    android:orientation="horizontal"
    tools:context=".stories">

</LinearLayout>

My progressbar

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="5dp">

    <ProgressBar
        android:id="@+id/stories_progressBar_id"
        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </ProgressBar>

</LinearLayout>

Answer 1

It is likely that you are not waiting for the top LinearLayout to have a size. You can wait for a size to be assigned by using a ViewTreeObserver.OnGlobalLayoutListener . Here is some code that should help:

linearLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
        linearLayout.getViewTreeObserver().removeOnGlobalLayoutListener(this);

        linearLayout.removeAllViews();
        int newWidth = linearLayout.getWidth() / 10;
        int newHeight = linearLayout.getHeight();
        int i = 0;
        while (i < 10) {
            i++;
            LinearLayout child =
                    (LinearLayout) getLayoutInflater().inflate(R.layout.stories_progress,
                            linearLayout, false);
            LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) child.getLayoutParams();
            lp.width = newWidth;
            lp.height = newHeight;
            linearLayout.addView(child);
        }
    }
})