Well basically I have a list and what I want is that for textviews that meet a condition, their color would be different.
public class CustomTempAdapter extends ArrayAdapter<String> {
private Context mContext;
private int id;
private List<String> items;
public CustomTempAdapter(Context context, int textViewResourceId, List<String> list) {
super(context, textViewResourceId, list);
mContext = context;
id = textViewResourceId;
items = list;
}
@Override
public View getView(int position, View v, ViewGroup parent) {
View mView = v;
if (mView == null) {
LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mView = vi.inflate(id, null);
}
TextView text = (TextView) mView.findViewById(R.id.tempView);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
items.forEach(item -> {
if (Double.parseDouble(item) > 100.00) {
text.setBackgroundColor(Color.RED);
int color = Color.argb(200, 255, 64, 64);
text.setBackgroundColor(color);
}
});
}
return mView;
}
}
CustomTempAdapter adapter = new CustomTempAdapter(this, R.layout.customTextView, normalStrings);
ListView list = findViewById(R.id.customListView);
list.setAdapter(adapter);
Currently this is only displaying blank textviews. I tried a different approach. This time using a normal ArrayAdapter<String>, then whenever an item is added:
View v;
for (int i = 0; i < list.getChildCount(); i++) {
v = list.getChildAt(i);
TextView tv = v.findViewById(R.id.tempView);
if (tv != null && Double.parseDouble(tv.getText().toString()) > 100)
tv.setTextColor(Color.parseColor("#FF0000"));
}
In this approach, I iterate through all the textviews and try to change their color. It does not work.
Answer
You could rewrite getView method as following:
public View getView(int position, View v, ViewGroup parent) {
View mView = v;
if (mView == null) {
LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mView = vi.inflate(id, null);
}
TextView text = (TextView) mView.findViewById(R.id.tempView);
Double value = Double.parseDouble(items.get(position));
if (value > 100.00) {
int color = Color.argb(200, 255, 64, 64);
text.setBackgroundColor(color);
} else {
text.setBackgroundColor(Color.GREEN);
}
return mView;
}