如何在Android中动态地使用带有可滚动内容的固定标头？

Question

我已经以编程方式创建了一个包含按钮的RelativeLayout 。 我还创建了一个ScrollView ，其中包含一个LinearLayout ，其中包含10个以上的TextViews 。 我想让RelativeLayout顶部对齐并固定。 当有人尝试向下滚动时，我希望所有TextViews都在固定的RelativeLayout 。 我希望该按钮始终可见。 使用此代码，不会显示RelativeLayout和按钮。 我哪里错了？

RelativeLayout（固定）
-按钮
的LinearLayout
-ScrollView
-TextView
-+其他10个TextView
这是我的代码：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    final RelativeLayout relativeLayout = new RelativeLayout(this);
    RelativeLayout.LayoutParams relativeLayoutParams = new RelativeLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    relativeLayout.setLayoutParams(relativeLayoutParams);
    this.setContentView(relativeLayout);

    final Button restartButton = new Button(this);
    restartButton.setText(R.string.restartButton);
    LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    restartButton.setLayoutParams(buttonParams);
    relativeLayout.addView(restartButton);

    ScrollView scrollView = new ScrollView(this);
    this.setContentView(scrollView);

    final LinearLayout linearLayout = new LinearLayout(this);
    LinearLayout.LayoutParams linearLayoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    linearLayout.setLayoutParams(linearLayoutParams);
    linearLayout.setOrientation(linearLayout.VERTICAL);
    scrollView.addView(linearLayout);

    TextView textView1 = new TextView(this);
    testTitle.setText(R.string.text_view1);
    linearLayout.addView(textView1);

    // + other 10 text views
}

谢谢！

Answer 1

在代码中，您将relativeLayout替换为ScrollView。 只需首先将一些LinearLayout设置为contentView，然后通过addView(relativeLayout)将您的RelativeLayout放置在那里，还可以通过addView(scrollView)将您的scrollView放置在那里

编辑：

您的新代码：

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        final LinearLayout mainLinearLayout = new LinearLayout(this);
        LinearLayout.LayoutParams mainLinearLayoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
        mainLinearLayout.setLayoutParams(mainLinearLayoutParams);
        mainLinearLayout.setOrientation(LinearLayout.VERTICAL);
        this.setContentView(mainLinearLayout);

        final RelativeLayout relativeLayout = new RelativeLayout(this);
        RelativeLayout.LayoutParams relativeLayoutParams = new RelativeLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        relativeLayout.setLayoutParams(relativeLayoutParams);
        mainLinearLayout.addView(relativeLayout);

        final Button restartButton = new Button(this);
        restartButton.setText(R.string.restartButton);
        LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        restartButton.setLayoutParams(buttonParams);
        relativeLayout.addView(restartButton);

        ScrollView scrollView = new ScrollView(this);
        mainLinearLayout.addView(scrollView);

        final LinearLayout linearLayout = new LinearLayout(this);
        LinearLayout.LayoutParams linearLayoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        linearLayout.setLayoutParams(linearLayoutParams);
        linearLayout.setOrientation(linearLayout.VERTICAL);
        scrollView.addView(linearLayout);

        TextView textView1 = new TextView(this);
        testTitle.setText(R.string.text_view1);
        linearLayout.addView(textView1);

        // + other 10 text views
    }

编辑2：根据注释将第一个linearLayout重命名为mainLinearLayout