Android 自定义ListView 选定的项目子项?
我有一个自定义列表视图行,其中包含许多 textView 组件。我创建了一个项目,其中每个列表视图行都包含几位信息,而不是“标准”单个文本项目。对于此示例,我在列表视图中的每一行都有一个记录 ID、名称和描述。
我的列表视图通过
this.mDbHelper = new RecordDBAdapter(this);
this.mDbHelper.open();
Cursor c = this.mDbHelper.fetchAllRecords();
startManagingCursor(c);
String[] from = new String[] {RecordDBAdapter.ROW_ID, RecordDBAdapter.NAME, RecordDBAdapter.DESCRIPTION};
int[] to = new int[] {R.id.recordId, R.id.lblName, R.id.lblDescription};
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter records = new SimpleCursorAdapter(this, R.layout.record_row, c, from, to);
this.list.setAdapter(dives);
现在我想要的是能够访问每个单击的项目中的 recordId 值。我尝试按照 Android 教程进行操作,但没有成功。他们做了类似的事情
Object o = adapter.getItemAtPosition(position);
,但这仍然没有帮助。我真正想要的是获取每个选定列表项中的 recordId 的值。有谁知道这是如何实现的?这是我的 onItemClick 事件:
protected OnItemClickListener onListItemClick = new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> adapter, View view, int position, long rowId) {
// My goal is either to grab the value of the
// recordId value from the textView, or from the adapter.
//Object o = adapter.getItemAtPosition(position); //Tried this, no joy
Intent intent = new Intent(NeatActivity.this, SomeOtherActivity.class);
// intent.putExtra("selectedRecordId",val); //val here is a numerical record row id being passed to another activity.
startActivity(intent);
}
};
I have a custom listview row that contains a number of textView components. Instead of the "standard" single text item, I have created a item where each listview row contains several bits of information. For this example, I have a record id, a name, and a description for each row in the listview.
I have my listview populated via
this.mDbHelper = new RecordDBAdapter(this);
this.mDbHelper.open();
Cursor c = this.mDbHelper.fetchAllRecords();
startManagingCursor(c);
String[] from = new String[] {RecordDBAdapter.ROW_ID, RecordDBAdapter.NAME, RecordDBAdapter.DESCRIPTION};
int[] to = new int[] {R.id.recordId, R.id.lblName, R.id.lblDescription};
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter records = new SimpleCursorAdapter(this, R.layout.record_row, c, from, to);
this.list.setAdapter(dives);
Now what I want is to be able to access the recordId value within each clicked item. I've tried to follow the Android tutorials to no avail. They do something like
Object o = adapter.getItemAtPosition(position);
but that still doesn't help either. What I REALLY want is to get the value of the recordId WITHIN each selected listItem. Does anyone know how this would be accomplished? Here is my onItemClick event:
protected OnItemClickListener onListItemClick = new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> adapter, View view, int position, long rowId) {
// My goal is either to grab the value of the
// recordId value from the textView, or from the adapter.
//Object o = adapter.getItemAtPosition(position); //Tried this, no joy
Intent intent = new Intent(NeatActivity.this, SomeOtherActivity.class);
// intent.putExtra("selectedRecordId",val); //val here is a numerical record row id being passed to another activity.
startActivity(intent);
}
};
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您试图在默认适配器类之外做太多事情。您需要编写自己的适配器类,扩展
simplecursoradapter
,然后您可以创建任何您想要的方法,在您想要的任何位置获取您想要的任何内容。You're trying to do too much out of the default adapter class. You need to write your own adapter class, extend
simplecursoradapter
, and then you can make any method you want to get whatever you want at any position you want.