Android按钮单击时添加行到表

Question

我的应用程序中有一个TableLayout。到目前为止，我有两条明确的行。 One Row分配了静态项目，另一行分配了3个微调器。

我想要做的是，当我点击按钮时添加一个新的TableRow。到目前为止，我有以下代码：

<TableRow
    android:layout_width="fill_parent">
    android:stretchColumns="0,1,2"

    <Spinner
    android:padding="3dip"
    android:gravity="left"
    android:id="@+id/Spinner1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp" />


    <Spinner
    android:padding="3dip"
    android:gravity="left"
    android:id="@+id/Spinner2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp" />

    <Spinner
    android:padding="3dip"
    android:gravity="left"
    android:id="@+id/spinner3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp" />
</TableRow>

这只是我的第二行，当我点击所述按钮时，我要添加的行。我的问题是，每次用户点击按钮时，如何将以下行添加到我的视图中？微调器的值会有所不同，但变量将保持不变。

编辑：

更多代码：

        /* Find Tablelayout defined in teh XML file */
    TableLayout tl = (TableLayout) findViewById(R.id.listTable);
    /* Create a new row to be added. */
    TableRow tr = new TableRow(this);
    tr.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
    /* Create a Button to be the row-content. */
    Button b = new Button(this);
    b.setText("Add row");
    b.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
    /* Add Button to row. */
    tr.addView(b);
    /* Add row to TableLayout. */

    tl.addView(tr, new TableLayout.LayoutParams(TableLayout.LayoutParams.FILL_PARENT, TableLayout.LayoutParams.WRAP_CONTENT));
}

视图已更改为：

<TableRow
    android:id="@+id/copyRow"
    android:layout_width="fill_parent" >
    android:stretchColumns="0,1,2"

    <Spinner
    android:padding="3dip"
    android:gravity="left"
    android:id="@+id/Spinner1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp" />


    <Spinner
    android:padding="3dip"
    android:gravity="left"
    android:id="@+id/Spinner2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp" />

    <Spinner
    android:padding="3dip"
    android:gravity="left"
    android:id="@+id/spinner3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp" />
</TableRow>

如果它有所作为，我使用JellyBean 4.3作为目标API

Answer 1

这是ListView

的解决方案

您可以查找所有源代码here

活动类

public class MainActivity extends Activity {


private List<RowItem> rows = new ArrayList<RowItem>();
private ListView list;
private Button addButton;
private SimpleListAdapter listAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // get view elements
    list = (ListView)findViewById(R.id.list);
    addButton = (Button)findViewById(R.id.addButton);


    //lets add few items to our list, note that selection item should not exceed length of spinners item
    rows.add(new RowItem(0, 0, 0));
    rows.add(new RowItem(0, 1, 2));
    rows.add(new RowItem(2, 1, 1));

    //create adapter and assign it to your list view

    listAdapter = new SimpleListAdapter(this, R.layout.list_item, rows);
    list.setAdapter(listAdapter);

    addButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            rows.add(new RowItem(0, 0, 0));
            listAdapter.notifyDataSetChanged();
        }
    });
}

适配器类

public class SimpleListAdapter extends ArrayAdapter<RowItem>{

private Context context;
private int layoutResourceId;   
private List<RowItem> data = null;

private ArrayList<String> spinnerArray1 = new ArrayList<String>();
private ArrayList<String> spinnerArray2 = new ArrayList<String>();
private ArrayList<String> spinnerArray3 = new ArrayList<String>();

public SimpleListAdapter(Context context, int layoutResourceId, List<RowItem> data) {
    super(context, layoutResourceId, data);
    this.layoutResourceId = layoutResourceId;
    this.context = context;
    this.data = data;

    spinnerArray1.add("S1 One");
    spinnerArray1.add("S1 Two");
    spinnerArray1.add("S1 Three");

    spinnerArray2.add("S2 One");
    spinnerArray2.add("S2 Two");
    spinnerArray2.add("S2 Three");

    spinnerArray3.add("S3 One");
    spinnerArray3.add("S3 Two");
    spinnerArray3.add("S3 Three");
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    ItemHolder holder;
    if(row == null)
    {
        LayoutInflater inflater = ((Activity)context).getLayoutInflater();
        row = inflater.inflate(layoutResourceId, parent, false);

        holder = new ItemHolder();
        holder.Spinner1 = (Spinner)row.findViewById(R.id.Spinner1);
        holder.Spinner2 = (Spinner)row.findViewById(R.id.Spinner2);
        holder.Spinner3 = (Spinner)row.findViewById(R.id.Spinner3);


        //add adapter to spinners so that there is something to select from
        ArrayAdapter<String> spinnerArrayAdapter1 = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_dropdown_item, spinnerArray1);
        holder.Spinner1.setAdapter(spinnerArrayAdapter1);

        ArrayAdapter<String> spinnerArrayAdapter2 = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_dropdown_item, spinnerArray2);
        holder.Spinner2.setAdapter(spinnerArrayAdapter2);

        ArrayAdapter<String> spinnerArrayAdapter3 = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_dropdown_item, spinnerArray3);
        holder.Spinner3.setAdapter(spinnerArrayAdapter3);

        row.setTag(holder);
    }
    else
    {
        holder = (ItemHolder)row.getTag();
    }

    final RowItem rowItem = data.get(position);
    holder.Spinner1.setSelection(rowItem.getSelectionIndex1());
    holder.Spinner2.setSelection(rowItem.getSelectionIndex2());
    holder.Spinner3.setSelection(rowItem.getSelectionIndex3());

    holder.Spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
            Toast.makeText(context, "you selected an item from spinner 1", Toast.LENGTH_SHORT).show();

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });

    return row;
}


class ItemHolder{
    Spinner Spinner1;
    Spinner Spinner2;
    Spinner Spinner3;
}

简单模型

public class RowItem {

private int selectionIndex1;
private int selectionIndex2;
private int selectionIndex3;


public RowItem(int selectionIndex1, int selectionIndex2, int selectionIndex3) {
    super();
    this.selectionIndex1 = selectionIndex1;
    this.selectionIndex2 = selectionIndex2;
    this.selectionIndex3 = selectionIndex3;
}
public int getSelectionIndex1() {
    return selectionIndex1;
}
public void setSelectionIndex1(int selectionIndex1) {
    this.selectionIndex1 = selectionIndex1;
}
public int getSelectionIndex2() {
    return selectionIndex2;
}
public void setSelectionIndex2(int selectionIndex2) {
    this.selectionIndex2 = selectionIndex2;
}
public int getSelectionIndex3() {
    return selectionIndex3;
}
public void setSelectionIndex3(int selectionIndex3) {
    this.selectionIndex3 = selectionIndex3;
}

}

查看项目：主视图

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical"
android:gravity="center" >

<ListView 
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:dividerHeight="5dp"/>

<Button 
    android:id="@+id/addButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="Add Item"
    />

列表视图的项呈示器

<?xml version="1.0" encoding="utf-8"?>

<Spinner
    android:id="@+id/Spinner1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp"
    android:gravity="left"
    android:padding="3dip" />

<Spinner
    android:id="@+id/Spinner2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp"
    android:gravity="left"
    android:padding="3dip" />

<Spinner
    android:id="@+id/Spinner3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp"
    android:gravity="left"
    android:padding="3dip" />