在Android中以编程方式添加LinearLayout无法正常工作

Question

在Android中以编程方式添加LinearLayout无法正常工作

androidandroid-layoutandroid-linearlayout

24

层次结构如下：

RelativeLayout
- LinearLayout (vertical)
  - FrameLayout (权重为5)
    - ImageView
  - View (权重为1)

这个View只是用来占位的虚假视图。我在布局xml中实现它，它可以工作。但是当我想以编程方式实现时，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);

- Tommy

1个回答

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- Piyush · Accepted Answer

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);

我刚刚整理了你的代码，以便更好地理解，并为之设置了背景颜色，以获得清晰的图像。由于我不知道你想要什么，所以你可以浏览它。希望这很有帮助。您应该提供您正在使用的 XML，以便我们确切地知道您想要什么。