如何在 Android 中动态地拥有一个带有可滚动内容的固定 header？

Question

我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，其中超过 10 个 TextViews。我想让 RelativeLayout 顶部对齐并固定。当有人试图向下滚动时，我希望所有 TextViews 都位于固定的 RelativeLayout 后面。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？

相对布局（固定）
- 按钮
线性布局
- 滚动视图
- 文本视图
- + 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

在您的代码中，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 RelativeLayout 放在那里，然后通过 addView(scrollView)

将 scrollView 放在那里

编辑：

您的新密码：

@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：根据评论将第一个 linearLayout 重命名为 mainLinearLayout

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android-layout

android-linearlayout

android-scroll