java - LinearLayout.addView(TextView) 不起作用

Question

private LinearLayout clmnView;
LinearLayout clmnView = new LinearLayout(getContext());
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
        LinearLayout.LayoutParams.MATCH_PARENT,
        LinearLayout.LayoutParams.WRAP_CONTENT);
int margin = DimensionsHelper.getMargins(getContext(), DimensionsHelper.DimensionType.BALL);
params.setMargins(0, margin, 0, margin);
clmnView.setLayoutParams(params);
clmnView.setOrientation(LinearLayout.VERTICAL);
clmnView.setGravity(Gravity.CENTER_VERTICAL);

TextView historyTextView = new TextView(getContext());
historyTextView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
                     LinearLayout.LayoutParams.WRAP_CONTENT));
             historyTextView.setText("this is history");
clmnView.addView(historyTextView);

无论我做什么，historyTextView 都不会显示在我的 clmnView 中。能否请你帮忙？预先感谢您。

Answer 1

好吧，一切都按预期进行。但我在白色背景中显示白色文本。像这样更改文本的颜色:

historyTextView.setTextColor(Color.parseColor("#000000"));

我的文字出现了。