在Android中以编程方式设置堆叠布局 [英] Setting stacked up layout programmatically in android
问题描述
我想在它们之间嵌套线性布局的相对布局,但是我无法理解如何以编程方式嵌套它们
I would like to have a relative layout with linear layouts nested in between them but i am unable to understand how ill nest them programmatically
这是我作为xml文件所拥有的:
This is what i have as my xml file:
<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>
这将产生我想要的布局:
This produces the layout that i want:
现在我想添加以上布局并将其更改为Java方式
Now i would like to add the above layout and change it to a java way
我尝试过
//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);
无论我开始什么都失败了,因为我不知道如何嵌套不同的线性布局,
Whatever i have started fails since am unable to know how to nest the different linear layouts,
我可能想要有关如何以编程方式进行此嵌套的指南,以便我可以实现xml文件生成的相同内容
I would probably like guidelines on how to do this nesting programmatically so that i can achieve the same thing generated by the xml file
推荐答案
如何完成此示例的小例子.因此,您要做的就是将内部项目添加到我的嵌套布局中并配置边距/填充等.还添加了背景以实现更好的可视化.
Little example how it can be done. So, all you need to do is to add inner items to my nested layouts and configure margins/paddings etc. Also added background for better visualization.
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);
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