Android 运行时布局教程 [英] Android Runtime Layout Tutorial

问题描述

有谁知道如何在 android 中执行运行时进行 Activity 布局或有很好的参考吗?

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

这是我的活动代码.我确定我只是忽略了在这里做点什么:

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);
  }
}

如您所见，我只是尝试添加带有单个文本视图的线性布局(仅用于测试目的)，但是，当 Activity 开始时，我只会看到一个带有应用名称标题栏的黑屏.

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.

谢谢

推荐答案

您忘记设置 contentView.你应该添加

You forgot to set your contentView. You should add

setContentView(layout);

在onCreate方法的末尾

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