设置叠起来的布局以编程方式在Android的

Question

我想与他们之间嵌套的线性布局相对布局，但我无法理解嵌套如何虐待他们编程

这是我为我的xml文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:orientation="horizontal"> 

<Button 
    android:id="@+id/button_top" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:layout_alignParentTop="true" 
    android:layout_margin="5dp" 
    android:text="Add items" /> 

<LinearLayout 
    android:id="@+id/above_part" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/button_top" 
    android:gravity="center_horizontal" 
    android:orientation="horizontal" 
    android:weightSum="1"> 

    <LinearLayout 
     android:layout_width="0dp" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.2" 
     android:orientation="vertical" 
     android:padding="2dp"> 

     <TextView 
      android:id="@+id/label_farmerprovince" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:gravity="center" 
      android:text="Province" 
      android:textSize="12sp" 
      android:textStyle="normal" /> 

     <EditText 
      android:id="@+id/fivms_farmerprovince" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:background="@android:drawable/editbox_background"> 

     </EditText> 

    </LinearLayout> 


    <LinearLayout 
     android:layout_width="0dp" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.2" 
     android:orientation="vertical" 
     android:padding="2dp"> 

     <TextView 
      android:id="@+id/distric_label" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:gravity="center" 
      android:text="District" 
      android:textSize="12sp" 
      android:textStyle="normal" /> 

     <EditText 
      android:id="@+id/district" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:background="@android:drawable/editbox_background" /> 

    </LinearLayout> 

    <LinearLayout 
     android:layout_width="0dp" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.2" 
     android:orientation="vertical" 
     android:padding="2dp"> 

     <TextView 
      android:id="@+id/label_farmeragriblocks" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:gravity="center" 
      android:text="Agriblocks" 
      android:textSize="12sp" 
      android:textStyle="normal" /> 

     <EditText 
      android:id="@+id/agri" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:background="@android:drawable/editbox_background" /> 

    </LinearLayout> 

</LinearLayout> 

这产生了我想要的布局：

现在我想补充上述布局，将其更改为一个java方式

我甲肝试过，因为我无法

//top layout 
     RelativeLayout newlayout = new RelativeLayout(getContext()); 
     LinearLayout belowlayout = new LinearLayout(getContext()); 
     LinearLayout above_part = new LinearLayout(getContext()); //lin with id of above_part 
     LinearLayout in_above_part_one = new LinearLayout(getContext()); //lin with id of above_part 

     //layouts properties 
     belowlayout.setOrientation(LinearLayout.HORIZONTAL); 

     //setids for the layouts 
     newlayout.setId(12); 
     belowlayout.setId(13); 

     //Button 
     Button additemsbtn = new Button(getContext()); 
     additemsbtn.setText("Log In"); 
     additemsbtn.setBackgroundColor(Color.BLACK); 

     //Username input 
     EditText username = new EditText(getContext()); 
     additemsbtn.setId(int 1); 
     username.setId(2); 

     RelativeLayout.LayoutParams buttonDetails = new RelativeLayout.LayoutParams(
       RelativeLayout.LayoutParams.WRAP_CONTENT, 
       RelativeLayout.LayoutParams.WRAP_CONTENT, 

     ); 

     RelativeLayout.LayoutParams usernameDetails = new RelativeLayout.LayoutParams(
       RelativeLayout.LayoutParams.WRAP_CONTENT, 
       RelativeLayout.LayoutParams.WRAP_CONTENT 
     ); 

     //Give rules to position widgets 
     usernameDetails.addRule(RelativeLayout.ABOVE, additemsbtn.getId()); 
     usernameDetails.addRule(RelativeLayout.CENTER_HORIZONTAL); 
     usernameDetails.setMargins(0,0,0,50); 

     buttonDetails.addRule(RelativeLayout.CENTER_HORIZONTAL); 
     buttonDetails.addRule(RelativeLayout.CENTER_VERTICAL); 

无论我已经开始不知道如何嵌套不同的线性布局，

我可能会喜欢有关如何以编程方式进行嵌套的指南，以便我可以实现由xml文件生成的相同内容

Answer 1

小例子它是如何完成的。所以，你所需要做的就是将内部项目添加到我的嵌套布局，并配置边距/填充等。还添加了背景以更好的可视化。

RelativeLayout root = (RelativeLayout) findViewById(R.id.root); 

    Button addButton = new Button(this); 
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
      ViewGroup.LayoutParams.WRAP_CONTENT, 
      ViewGroup.LayoutParams.WRAP_CONTENT); 
    params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); 
    addButton.setLayoutParams(params); 
    addButton.setId(123); 
    root.addView(addButton); 


    LinearLayout rootLinearlayout = new LinearLayout(this); 
    RelativeLayout.LayoutParams linearRootParams = new RelativeLayout.LayoutParams(
      ViewGroup.LayoutParams.MATCH_PARENT, 
      ViewGroup.LayoutParams.WRAP_CONTENT); 
    linearRootParams.addRule(RelativeLayout.BELOW, 123); 
    rootLinearlayout.setBackgroundColor(ContextCompat.getColor(this, R.color.colorAccent)); 
    rootLinearlayout.setLayoutParams(linearRootParams); 

    // Nested Linears 
    LinearLayout linearOne = new LinearLayout(this); 
    LinearLayout linearTwo = new LinearLayout(this); 
    LinearLayout linearThree = new LinearLayout(this); 
    LinearLayout.LayoutParams linearParamsWithWeight = new LinearLayout.LayoutParams(
      0, 
      300); 
    linearParamsWithWeight.weight = 1; 

    linearOne.setBackgroundColor(ContextCompat.getColor(this, android.R.color.black)); 
    linearTwo.setBackgroundColor(ContextCompat.getColor(this, android.R.color.holo_red_dark)); 
    linearThree.setBackgroundColor(ContextCompat.getColor(this, android.R.color.holo_blue_dark)); 

    linearOne.setLayoutParams(linearParamsWithWeight); 
    linearTwo.setLayoutParams(linearParamsWithWeight); 
    linearThree.setLayoutParams(linearParamsWithWeight); 

    rootLinearlayout.addView(linearOne); 
    rootLinearlayout.addView(linearTwo); 
    rootLinearlayout.addView(linearThree);