TableLayout中表行的索引

时间:2011-08-08 01:18:49

标签: java android android-layout

我有一个TableLayout和一些未知数量的TableRows,它们是根据数据库中的内容生成的。

每一行都附加一个OnClick侦听器,但是,一旦发生单击,我无法(从内容)告诉它来自哪一行。有没有办法可以获得与TableLayout相关的tablerow索引,还是应该尝试其他的东西?

一些代码:

private void buildBudgetTable() {
    NumberFormat currencyFormatter = DecimalFormat.getCurrencyInstance();

    TableLayout budgetTable = (TableLayout) findViewById(R.id.budgetTable);
    budgetTable.removeAllViews();

    try {
        this.budgetItems = Budget.GetEntries(this);
    } catch (SQLException e) {
        Toast.makeText(getApplicationContext(), "Could not load budget", Toast.LENGTH_SHORT).show();
        e.printStackTrace();
        finish();
    }

    for(BudgetEntryItem entry : budgetItems){
        TableRow tr = new TableRow(this);
        tr.setPadding(1, 2, 1, 2);

        TextView txtLeft = new TextView(this);
        txtLeft.setText(entry.Memo);
        txtLeft.setGravity(Gravity.LEFT);
        txtLeft.setPadding(3,3,3,3);

        TextView txtRight = new TextView(this);
        txtRight.setText(currencyFormatter.format(entry.Amount));
        txtRight.setGravity(Gravity.RIGHT);
        txtRight.setPadding(3,3,3,3);

        if(entry.Amount > 0){
            txtRight.setBackgroundColor(Color.rgb(0x33, 0xEE, 0x33));
            txtLeft.setBackgroundColor(Color.rgb(0x33, 0xEE, 0x33));
        }else{
            txtRight.setBackgroundColor(Color.rgb(0xEE, 0x33, 0x33));
            txtLeft.setBackgroundColor(Color.rgb(0xEE, 0x33, 0x33));
        }

        tr.addView(txtLeft);
        tr.addView(txtRight);
        tr.setOnClickListener(this);

        budgetTable.addView(tr);
    }
}

3 个答案:

答案 0 :(得分:8)

有同样的问题,这是解决方案:

row.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Current Row Index
                int rowIndex = tableLayout.indexOfChild(v);
                // Do what you need to do.
            }
        });

就我而言,我在TableRow中的TextView上有了Listener ...

textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // The row the view is in
                TableRow row = (TableRow) v.getParent();
                // It's index
                int index = tableLayout.indexOfChild(row);
            }
        });

答案 1 :(得分:3)

使用TableRow的标签:

BudgetEntryItem entry = null;
for(int i = 0; i < budgetItems; i++){
    entry = budgetItems[i]; // or budgetItems.get(i), etc
    TableRow tr = new TableRow(this);

    // Set the index as the tag
    tr.setTag(i); // or entry.setTag(entry.index()), etc

    // ...
}

现在要获取索引,只需将其转换回onClick中的int,它将为您提供原始视图。

撇开
有些人不愿意以这种方式使用Tag,因为它将数据层与UI层耦合在一起。另一种方法是使用字典或词典等间接访问项目,而不将UI元素绑定到数据对象。

答案 2 :(得分:3)

试试这个,

row = new TableRow(this);
    row.setId(i);

    row.setOnClickListener(new OnClickListener(){
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Toast toast = Toast.makeText(getApplicationContext(), "Tabele row clicked "+ Integer.toString(v.getId()) , Toast.LENGTH_LONG);
            toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
            toast.show();

        }
    });