MacaronLover MacaronLover - 1 month ago 6
Android Question

Textviews in RelativeLayout not appearing below each other programatically

I'm trying to poisition some textviews below another text view within a

RelativeLayout
, but for some reason it's not working:

enter image description here

import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.widget.TextViewCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridLayout.LayoutParams;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.companyname.projectname.R;

import static com.companyname.projectname.R.id.FL_relativeLayout;


public class FragmentFL extends android.support.v4.app.Fragment {

public FragmentFL() {
}

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

return inflater.inflate(R.layout.fragment_fl, container, false);
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
View v = getView();
assert v != null;

RelativeLayout relativelayout = v.findViewById(FL_relativeLayout);

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

// add text views
TextView txt1 = new TextView(getActivity());
txt1.setText("Blue");
TextViewCompat.setTextAppearance(txt1, android.R.style.TextAppearance_Large);
txt1.setTextColor(Color.BLACK);

TextView txt2 = new TextView(getActivity());
txt2.setText("Black");
TextViewCompat.setTextAppearance(txt2, android.R.style.TextAppearance_Medium);
txt2.setTextColor(Color.BLACK);

TextView txt3 = new TextView(getActivity());
txt3.setText("Green");
TextViewCompat.setTextAppearance(txt3, android.R.style.TextAppearance_Large);
txt3.setTextColor(Color.BLACK);

TextView txt4 = new TextView(getActivity());
txt4.setText("Red");
TextViewCompat.setTextAppearance(txt4, android.R.style.TextAppearance_Medium);
txt4.setTextColor(Color.BLACK);

TextView txt5 = new TextView(getActivity());
txt5.setText("Yellow");
TextViewCompat.setTextAppearance(txt5, android.R.style.TextAppearance_Large);
txt5.setTextColor(Color.BLACK);

TextView txt6 = new TextView(getActivity());
txt6.setText("White");
TextViewCompat.setTextAppearance(txt6, android.R.style.TextAppearance_Medium);
txt6.setTextColor(Color.BLACK);

txt1.setId(View.generateViewId());
txt2.setId(View.generateViewId());
txt3.setId(View.generateViewId());
txt4.setId(View.generateViewId());
txt5.setId(View.generateViewId());
txt6.setId(View.generateViewId());

rlp.addRule(RelativeLayout.BELOW, txt1.getId());
rlp.addRule(RelativeLayout.BELOW, txt2.getId());
rlp.addRule(RelativeLayout.BELOW, txt3.getId());
rlp.addRule(RelativeLayout.BELOW, txt4.getId());
rlp.addRule(RelativeLayout.BELOW, txt5.getId());
txt2.setLayoutParams(rlp);
txt3.setLayoutParams(rlp);
txt4.setLayoutParams(rlp);
txt5.setLayoutParams(rlp);
txt6.setLayoutParams(rlp);

relativelayout.addView(txt1);
relativelayout.addView(txt2);
relativelayout.addView(txt3);
relativelayout.addView(txt4);
relativelayout.addView(txt5);
relativelayout.addView(txt6);


super.onActivityCreated(savedInstanceState);
}
}

Answer Source

You need to use different LayoutParams for each TextView as in

 rlp.addRule(RelativeLayout.BELOW, txt1.getId());
 rlp1.addRule(RelativeLayout.BELOW, txt2.getId());
 rlp2.addRule(RelativeLayout.BELOW, txt3.getId());
 rlp3.addRule(RelativeLayout.BELOW, txt4.getId());
 rlp4.addRule(RelativeLayout.BELOW, txt5.getId());

    txt2.setLayoutParams(rlp);
    txt3.setLayoutParams(rlp1);
    txt4.setLayoutParams(rlp2);
    txt5.setLayoutParams(rlp3);
    txt6.setLayoutParams(rlp4);