java - 在 ScrollView 中以编程方式创建 View

Question

我想将以编程方式创建的 View 添加到 ScrollView 中，并且该 ScrollView 是在 XML 文件中声明的。如何实现这一目标？

package com.example.multipleviews;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.Toast;

public class MainView extends Activity {

    LinearLayout main, child;
    ScrollView sc;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_view);
        main = (LinearLayout) findViewById(R.id.main);
        // Toast.makeText(getApplicationContext(), "hello", 0).show();
        view();
    }

    private void view() {
        // TODO Auto-generated method stub
        main.removeAllViews();

        sc = (ScrollView) findViewById(R.id.sc);
        sc.removeAllViews();

        child = (LinearLayout) findViewById(R.id.lin);
        child.removeAllViews();

        for (int i = 0; i < 5; i++) {
            Button b = new Button(this);
            b.setText("Button "+i);
            b.setId(i);
            child=(LinearLayout)findViewById(R.id.lin);
            child.addView(b);

        }
        sc.addView(child);
        main.addView(sc);
        setContentView(main);

    }

}

这是我的代码......但应用程序不运行......

Answer 1

第1步:在ScrollView中添加任意布局容器(例如线性布局)

<ScrollView android:id="@+id/ScrollView01"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
   <LinearLayout android:id="@+id/resultContentHolder"
  android:layout_width="fill_parent"
  android:orientation="vertical"
  android:gravity="center_horizontal|top" 
  android:layout_height="fill_parent" />
</ScrollView> 

第 2 步:在 Activity 类的布局容器中添加任何自定义 View ，例如

LinearLayout gapH = new LinearLayout(this);
            LayoutParams gapParamsH = new LayoutParams(LayoutParams.FILL_PARENT,10);
            gapH.setLayoutParams(gapParamsH);
            resultContentHolder.addView(gapH);