Android运行布局教程 [英] Android Runtime Layout Tutorial

问题描述

有谁知道如何执行或对android系统中做一个活动的布局在运行时一个很好的参考？

Does anyone know how to perform or have a good reference for doing an activity layout at runtime in android?

下面是$ C $下我的活动。我敢肯定，我只是忽视做的东西在这里：

Here is the code for my activity. I'm sure I'm just neglecting to do something here:

package com.isi.sa;

import android.app.Activity;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;

public class SimpleAssessmentTest extends Activity {
  LinearLayout layout;
  TextView question;

  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    layout = new LinearLayout(this);
    question = new TextView(this);

    layout.setLayoutParams(new ViewGroup.LayoutParams(-1,-1));
    layout.setBackgroundColor(R.color.blue);

    question.setLayoutParams(new ViewGroup.LayoutParams(-1,-2));
    question.setTextColor(R.color.green);
    question.setTextSize(1,14);

    question.setText("This is question1");
    layout.addView(question);

    setContentView(layout);
  }
}

正如你所看到的，我只是想添加一个线性布局，一个文本视图（只是为了测试目的），然而，在活动开始时，我只是得到一个黑色的屏幕，我的应用程序名称的标题栏。

As you can see I'm just trying to add a linear layout with a single text view (just for testing purposes) however, when the activity starts I just get a black screen with a title bar of my app name.

感谢

推荐答案

您忘了把内容查看。您应该添加

You forgot to set your contentView. You should add

setContentView(layout);

在年底的的onCreate 方法

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