添加的LinearLayout编程方式在Android不工作 [英] Adding LinearLayout programmatically in Android doesn't work

问题描述

的层次结构是这样的：

• RelativeLayout的
  • 的LinearLayout（垂直）
    • 的FrameLayout（权重5）
      • 的ImageView
    • 查看（权重为1）

视图仅仅是用于间隔目的的虚拟视图。 我这样做是在布局XML和它的作品。 但是，当我想以编程方式做到这一点，下面的codeS不工作。

 的LinearLayout LL =新的LinearLayout（本）;
ImageView的阶梯=新ImageView的（这一点）;
的FrameLayout ladderFL =新的FrameLayout（本）;
查看dummyView =新景（本）;
ladder.setImageResource（R.drawable.ladder1）;
LL.setOrientation（LinearLayout.VERTICAL）;
的LayoutParams LLParams =新的LayoutParams（LayoutParams.MATCH_PARENT，LayoutParams.MATCH_PARENT）;
LinearLayout.LayoutParams ladderFLParams =新LinearLayout.LayoutParams（LinearLayout.LayoutParams.WRAP_CONTENT，0）;
ladderFLParams.weight = 5F;
LinearLayout.LayoutParams dummyParams =新LinearLayout.LayoutParams（0,0）;
dummyParams.weight = 1F;

FrameLayout.LayoutParams ladderParams =新FrameLayout.LayoutParams（FrameLayout.LayoutParams.WRAP_CONTENT，FrameLayout.LayoutParams.WRAP_CONTENT，Gravity.BOTTOM）;
ladder.setLayoutParams（ladderParams）;
ladderFL.setLayoutParams（ladderFLParams）;
dummyView.setLayoutParams（dummyParams）;
LL.setWeightSum（1207米）;
LL.setLayoutParams（LLParams）;

ladderFL.addView（梯）;
LL.addView（ladderFL）;
LL.addView（dummyView）;
（（RelativeLayout的）findViewById（R.id.screenRL））addView（LL）。
 

解决方案

 的LinearLayout LL =新的LinearLayout（本）;
    LL.setBackgroundColor（Color.CYAN）;
    LL.setOrientation（LinearLayout.VERTICAL）;

    的LayoutParams LLParams =新的LayoutParams（LayoutParams.MATCH_PARENT，LayoutParams.MATCH_PARENT）;

    LL.setWeightSum（1207米）;
    LL.setLayoutParams（LLParams）;


    ImageView的阶梯=新ImageView的（这一点）;
    ladder.setImageResource（R.drawable.ic_launcher）;

    FrameLayout.LayoutParams ladderParams =新FrameLayout.LayoutParams（FrameLayout.LayoutParams.WRAP_CONTENT，FrameLayout.LayoutParams.WRAP_CONTENT，Gravity.BOTTOM）;
    ladder.setLayoutParams（ladderParams）;

    的FrameLayout ladderFL =新的FrameLayout（本）;
    LinearLayout.LayoutParams ladderFLParams =新LinearLayout.LayoutParams（LinearLayout.LayoutParams.WRAP_CONTENT，0）;
    ladderFLParams.weight = 5F;
    ladderFL.setLayoutParams（ladderFLParams）;
    ladderFL.setBackgroundColor（Color.GREEN）;
    查看dummyView =新景（本）;

    LinearLayout.LayoutParams dummyParams =新LinearLayout.LayoutParams（LinearLayout.LayoutParams.MATCH_PARENT，0）;
    dummyParams.weight = 1F;
    dummyView.setLayoutParams（dummyParams）;
    dummyView.setBackgroundColor（Color.RED）;



    ladderFL.addView（梯）;
    LL.addView（ladderFL）;
    LL.addView（dummyView）;
    RelativeLayout的RL =（（RelativeLayout的）findViewById（R.id.screenRL））;
    rl.addView（LL）;
 

我已经安排你的code为了更好地理解，也给了它一个背景色，以获得清晰的图像，因为我不知道你想要的，你可以通过它的东西。我希望这是有帮助的。您应提供使用XML，所以我们知道你想要什么。

The hierarchy is like this:

• RelativeLayout
  • LinearLayout (vertical)
    • FrameLayout (weight 5)
      • ImageView
    • View (weight 1)

The View is just a dummy view for spacing purpose. I did it in the layout xml and it works. But when I want to do it programmatically, the following codes do not work.

LinearLayout LL = new LinearLayout(this);
ImageView ladder = new ImageView(this);
FrameLayout ladderFL = new FrameLayout(this);
View dummyView = new View(this);
ladder.setImageResource(R.drawable.ladder1);
LL.setOrientation(LinearLayout.VERTICAL);
LayoutParams LLParams = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
LinearLayout.LayoutParams ladderFLParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, 0);
ladderFLParams.weight = 5f;
LinearLayout.LayoutParams dummyParams = new LinearLayout.LayoutParams(0,0);
dummyParams.weight = 1f;

FrameLayout.LayoutParams ladderParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT, Gravity.BOTTOM);
ladder.setLayoutParams(ladderParams);
ladderFL.setLayoutParams(ladderFLParams);
dummyView.setLayoutParams(dummyParams);
LL.setWeightSum(6f);
LL.setLayoutParams(LLParams);

ladderFL.addView(ladder);
LL.addView(ladderFL);
LL.addView(dummyView);
((RelativeLayout) findViewById(R.id.screenRL)).addView(LL);

解决方案

LinearLayout LL = new LinearLayout(this);
    LL.setBackgroundColor(Color.CYAN);
    LL.setOrientation(LinearLayout.VERTICAL);

    LayoutParams LLParams = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);

    LL.setWeightSum(6f);
    LL.setLayoutParams(LLParams);


    ImageView ladder = new ImageView(this);
    ladder.setImageResource(R.drawable.ic_launcher);

    FrameLayout.LayoutParams ladderParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT, Gravity.BOTTOM);
    ladder.setLayoutParams(ladderParams);

    FrameLayout ladderFL = new FrameLayout(this);
    LinearLayout.LayoutParams ladderFLParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, 0);
    ladderFLParams.weight = 5f;
    ladderFL.setLayoutParams(ladderFLParams);       
    ladderFL.setBackgroundColor(Color.GREEN);
    View dummyView = new View(this);

    LinearLayout.LayoutParams dummyParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,0);
    dummyParams.weight = 1f;
    dummyView.setLayoutParams(dummyParams);
    dummyView.setBackgroundColor(Color.RED);



    ladderFL.addView(ladder);
    LL.addView(ladderFL);
    LL.addView(dummyView);
    RelativeLayout rl=((RelativeLayout) findViewById(R.id.screenRL));
    rl.addView(LL);

I have just arranged your code for better understanding, also gave it a background color to get the clear picture as I dont know what you want, you can go through it. I Hope it is helpful. You should provide your working xml so we know exactly what you want.

这篇关于添加的LinearLayout编程方式在Android不工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！