android - 以编程方式为 TextView 设置 layout_toLeftOf 和 layout_below

Question

我正在创建包含在 RelativeLayout 中的任意数量的 TextView。如何以编程方式将 TextView 放置在彼此下方或彼此相邻的位置？

我猜我应该使用 layout_toLeftOf 和 layout_below，但如何使用？

我知道我可以使用 RelativeLayout.LayoutParams，但这似乎只能定位布局而不是单个 TextView。

到目前为止的尝试:

public void updateTS ( ArrayList<String> arrayList ) {
    RelativeLayout rl = ( RelativeLayout ) mView.findViewById ( R.id.overview );
    RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams ( RelativeLayout.LayoutParams.WRAP_CONTENT,
            RelativeLayout.LayoutParams.WRAP_CONTENT );

    for ( int i = 0; i < arrayList.size (); i++ ) {
        TextView tv = new TextView ( getActivity () );
        tv.setId ( i );
        tv.setText ( arrayList.get ( i ).toString () );

        if ( i > 0 ) {
            lp.addRule ( RelativeLayout.BELOW, i - 1 );
        }

        rl.addView ( tv );
    }
}

Answer 1

您应该在 TextView 上设置一个新的 RelativeLayout.LayoutParams，而不是 RelativeLayout:

public void updateTS ( ArrayList<String> arrayList ) {
    RelativeLayout rl = ( RelativeLayout ) mView.findViewById ( R.id.overview );

    for ( int i = 0; i < arrayList.size (); i++ ) {
        TextView tv = new TextView ( getActivity () );
        tv.setId ( i );
        tv.setText ( arrayList.get ( i ).toString () );

        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams ( RelativeLayout.LayoutParams.WRAP_CONTENT,
            RelativeLayout.LayoutParams.WRAP_CONTENT );

        if ( i > 0 ) {
            lp.addRule ( RelativeLayout.BELOW, i - 1 );
        }

        tv.setLayoutParams(lp);
        rl.addView ( tv );
    }

}