如何在Android中的tableLayout中动态添加行 [英] How to add a row dynamically in a tableLayout in Android
问题描述
我有一个功能，可以从网页获取产品列表，并且我想在tableLayout中为列表的每个元素添加一行。
I have a function who gets a list of products from a webpage, and I want to add a row in a tableLayout for each element of the list.
public void getProductsOfCategory() throws IOException{
new Thread(){
public void run(){
//background code...
try {
Bundle extras = getIntent().getExtras();
String categoryName = extras.getString("categoryName");
HttpGet httpget = new HttpGet("http://romal.hopto.org/foodadvisor/users/getProductsOfCategory.json?category="+categoryName);
HttpResponse httpresp = httpClient.execute(httpget);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
httpresp.getEntity().writeTo(baos);
final String content = new String(baos.toByteArray());
CategoryActivity.this.runOnUiThread(new Runnable(){
public void run(){
//foreground code (UI)
//update user interface, for example, showing messages
try {
JSONObject jObject = new JSONObject(content);
JSONArray productsList = jObject.getJSONArray("response");
for(int i=0; i<productsList.length();i++){
JSONObject product = productsList.getJSONObject(i);
JSONObject productData = product.getJSONObject("Product");
String productDescription = productData.getString("description");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}.start();
}
在我的布局xml文件中，我定义了这样的表布局：
In my layout xml file I have defined the table layout like this:
<TableLayout
android:id="@+id/tableOfProducts"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/productDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:paddingBottom="7dp"
android:paddingLeft="14dp"
android:paddingRight="14dp"
android:paddingTop="7dp"
android:textSize="20dp" />
</TableLayout>
我想我必须在for循环中添加一些额外的代码，添加新行和新内容每个元素的textview，并使用包含产品说明的字符串设置文本视图的内容。
我该怎么做？
I imagine I have to add some extra code in the for loop, adding a new row and a new textview for each element, and setting the content of the text view with the string that has the description of the product. How can I do this?
推荐答案
检查一下，这是动态创建表行的一般方法。相应地对其进行修改
Check this out, this is the general way of creating table rows dynamically. Modify it accordingly
XML文件
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main_table"
android:layout_height="wrap_content"
android:layout_width="match_parent">
</TableLayout>
JAVA PART
TableLayout t1;
TableLayout tl = (TableLayout) findViewById(R.id.main_table);
创建表行标题以保存列标题
TableRow tr_head = new TableRow(this);
tr_head.setId(10);
tr_head.setBackgroundColor(Color.GRAY); // part1
tr_head.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
我要在表行中添加两个数据部分
TextView label_hello = new TextView(this);
label_hello.setId(20);
label_hello.setText("HELLO");
label_hello.setTextColor(Color.WHITE); // part2
label_hello.setPadding(5, 5, 5, 5);
tr_head.addView(label_hello);// add the column to the table row here
TextView label_android = new TextView(this); // part3
label_android.setId(21);// define id that must be unique
label_android.setText("ANDROID..!!"); // set the text for the header
label_android.setTextColor(Color.WHITE); // set the color
label_android.setPadding(5, 5, 5, 5); // set the padding (if required)
tr_head.addView(label_android); // add the column to the table row here
将列添加到表行后是时候将表格行添加到我们一开始获取的主表格布局中了
tl.addView(tr_head, new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT, //part4
LayoutParams.MATCH_CONTENT));
编辑：您可以按照您的代码进行操作
TextView[] textArray = new TextView[productsList.length()];
TableRow[] tr_head = new TableRow[productsList.length()];
for(int i=0; i<productsList.length();i++){
JSONObject product = productsList.getJSONObject(i);
JSONObject productData = product.getJSONObject("Product");
String productDescription = productData.getString("description");
//Create the tablerows
tr_head[i] = new TableRow(this);
tr_head[i].setId(i+1);
tr_head[i].setBackgroundColor(Color.GRAY);
tr_head[i].setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
// Here create the TextView dynamically
textArray[i] = new TextView(this);
textArray[i].setId(i+111);
textArray[i].setText(productDescription);
textArray[i].setTextColor(Color.WHITE);
textArray[i].setPadding(5, 5, 5, 5);
tr_head[i].addView(textArray[i]);
///将每个表行添加到表布局中
// Add each table row to table layout
tl.addView(tr_head[i], new TableLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
} // end of for loop
创建TextView和TableRow数组没有必要。您可以只包含 part1 ， part2 ， part3 （如果您需要多个字段）和for循环中的 part4 。
Creating the TextView and TableRow array are not necessary. You can just include part1, part2, part3 (if you need more than 1 field) and part4 inside your for loop.
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