在Android中以编程方式添加LinearLayout不起作用

Question

层次结构是这样的：

• 相对布局
  • 线性布局（垂直）
    • 框架布局（权重 5）
      • 图像视图
    • 视图（权重 1）

视图只是用于间距目的的虚拟视图。我在布局xml中做到了，它可以工作。但是当我想以编程方式执行此操作时，以下代码不起作用。

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);

Answer 1

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);

我刚刚安排了您的代码以更好地理解，还给了它背景颜色以获得清晰的图片，因为我不知道您想要什么，您可以浏览一下。我希望它对您有所帮助。您应该提供您的工作 xml，以便我们确切地知道您想要什么。