动态添加一个TextView - 机器人

问题描述

如何一个TextView动态地添加到这个？注释掉code不起作用。

 公共类myTextSwitcher延伸活动{

    TextView的私人会将myText;
    公共myTextSwitcher（字符串字符串）{

        // =会将myText新的TextView（本）;
        //myText.setText("My文本）;
    }
}
 

解决方案

您正在创建一个文本视图，并设置它的价值，但你不指定地点和方式应显示。你会将myText对象需要有某种这将使其可见的容器。

您正在试图做的是动态配置的图什么。看到这里href="http://www.dreamin$c$c.net/forums/topic/130521-android-part-iii-dynamic-layouts/" rel="nofollow">很好的入门文章一。从文章：

  //这是在哪里以及如何在视图中使用
TextView的电视=新的TextView（本）;
tv.setText（FTW动态布局！）;
ll.addView（电视）;

//这部分是那里的容器获得有线在一起
滚动型SV =新的滚动型（本）;
的LinearLayout LL =新的LinearLayout（本）;
ll.setOrientation（LinearLayout.VERTICAL）;
sv.addView（Ⅱ）;
 

How can I dynamically add a TextView to this? The commented out code doesn't work.

public class myTextSwitcher extends Activity {

    private TextView myText;
    public myTextSwitcher(String string){

        //myText = new TextView(this);
        //myText.setText("My Text");
    }
}

解决方案

You're creating a text view and setting its value but you're not specifying where and how it should be displayed. Your myText object needs to have a container of some sort which will make it visible.

What you're trying to do is dynamically layout a view. See here for a good starter article. From the article:

// This is where and how the view is used
TextView tv = new TextView(this);
tv.setText("Dynamic layouts ftw!");
ll.addView(tv);

// this part is where the containers get "wired" together
ScrollView sv = new ScrollView(this);
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
sv.addView(ll);

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