下面的第一个例子演示了如何完全在代码中构建UI。

例子

从Android Studio生成一个项目，剪切并粘贴以下代码到MainActivity.java。

package cn.w3cschool.app;
//from www.w3cschool.cn
import android.app.Activity;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MainActivity extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        LinearLayout nameContainer = new LinearLayout(this);
        LinearLayout addressContainer = new LinearLayout(this);
        LinearLayout parentContainer = new LinearLayout(this);

        nameContainer.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.WRAP_CONTENT));
        nameContainer.setOrientation(LinearLayout.HORIZONTAL);

        TextView nameLbl = new TextView(this);
        nameLbl.setText("Name: ");

        TextView nameValue = new TextView(this);
        nameValue.setText("w3cschool.cn");

        nameContainer.addView(nameLbl);
        nameContainer.addView(nameValue);

        addressContainer.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.WRAP_CONTENT));
        addressContainer.setOrientation(LinearLayout.VERTICAL);

        TextView addrLbl = new TextView(this);
        addrLbl.setText("Address:");

        TextView addrValue = new TextView(this);
        addrValue.setText("Main Street");

        addressContainer.addView(addrLbl);
        addressContainer.addView(addrValue);

        parentContainer.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.MATCH_PARENT));
        parentContainer.setOrientation(LinearLayout.VERTICAL);

        parentContainer.addView(nameContainer);
        parentContainer.addView(addressContainer);

        setContentView(parentContainer);
    }
}