android - 如何在 Horizo​​ntalScrollView 内的 LinearLayout 中正确显示按钮？

Question

我添加了一个带有 LinearLayout 的 Horizo​​ntalScrollView，以编程方式添加按钮以显示类别选择器。

这是在具有 API 23、1080x1920 xxhdpi 的模拟器中的结果:

这就是我使用 API 22 的 Android 手机的样子:

这是我的 xml 代码:

<HorizontalScrollView
        android:id="@+id/hsvClosetFilter"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_below="@+id/rlt"
        android:layout_marginTop="5dp">

        <LinearLayout
            android:id="@+id/viewCategoryNames"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:orientation="horizontal" />

    </HorizontalScrollView>

我正在像这样以编程方式添加按钮:

private void buildCategoryScroll() {
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(230, 80);
        layoutParams.setMargins(0, 10, 30, 10);

        for (int i=0; i<categoryNames.size(); i++) {
            final Button btCategory = new Button(getActivity());
            btCategory.setText(categoryNames.get(i));
            btCategory.setTextSize(16f);
            btCategory.setAllCaps(false);
            btCategory.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.colorPrimary));
            btCategory.setTextColor(ContextCompat.getColor(getActivity(), R.color.white));
            btCategory.setLayoutParams(layoutParams);
            btCategory.setTag(i);
            viewCategoryNames.addView(btCategory);
     }
}

Answer 1

主要 Activity :

public class MainActivity extends AppCompatActivity {

    LinearLayout viewCategoryNames;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        viewCategoryNames = (LinearLayout) findViewById(R.id.viewCategoryNames);
        buildCategoryScroll();

    }

    private void buildCategoryScroll() {
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        layoutParams.setMargins(0, 10, 30, 10);

        for (int i = 1; i <= 15; i++) {
            final Button btCategory = new Button(MainActivity.this);
            btCategory.setText(String.valueOf(i));
            btCategory.setTextSize(16f);
            btCategory.setAllCaps(false);
            btCategory.setBackgroundColor(ContextCompat.getColor(this, R.color.colorAccent));
            btCategory.setTextColor(ContextCompat.getColor(this, android.R.color.black));
            btCategory.setLayoutParams(layoutParams);
            btCategory.setTag(i);
            viewCategoryNames.addView(btCategory);
        }
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/hsvClosetFilter"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:layout_below="@+id/rlt"
    android:layout_marginTop="5dp"
    tools:context="com.example.rohantaneja.horizontalscrollview.MainActivity">

    <LinearLayout
        android:id="@+id/viewCategoryNames"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:orientation="horizontal" />

</HorizontalScrollView>