单击列表项上的更改复选框状态? [英] Change CheckBox state on List item click?
本文介绍了单击列表项上的更改复选框状态?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在它的每一行都有一个列表和一个复选框.我希望每当我单击一行时,复选框都会相应地更改其状态.
I have a list and a checkbox in every row of it. I want that whenever I click on a row, the checkbox changes its state accordingly.
checkbox.xml
checkbox.xml
<CheckBox
android:id="@+id/CheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:text="" />
点击我列表的监听器
protected void onListItemClick(ListView l, View v, int position, long id) {
Toast.makeText(getApplicationContext(), "You have selected item no."
+ (position + 1) + "", Toast.LENGTH_SHORT).show();
super.onListItemClick(l, v, position, id);
selectedRow = position;
if (v == null) {
LayoutInflater lif = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = lif.inflate(R.layout.posting_detail_question_row, null);
}
if (checkedTextView.isChecked()) {
Toast.makeText(getApplicationContext(), "Already voted",
Toast.LENGTH_SHORT).show();
} else {
String[] from = {"option", "votes"}; // values to fetch from
// hashmap
int[] to = {R.id.option, R.id.votes}; // id's for the view
SimpleAdapter adp = new SimpleAdapter(getApplicationContext(),
hashList, R.layout.posting_detail_question_row, from, to);
setListAdapter(adp);
checkedTextView.setChecked(true);
}
}
posting_detail_question_row.xml
posting_detail_question_row.xml
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:background="@drawable/poll_border_top_bg"
android:orientation="horizontal">
<TextView
android:id="@+id/option"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_marginLeft="10dp"
android:layout_weight=".3"
android:gravity="center_vertical"
android:text="Answer 1"
android:textColor="#333333"
android:textSize="15sp" />
<TextView
android:id="@+id/votes"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_marginLeft="10dp"
android:layout_weight="1"
android:gravity="center_vertical"
android:textColor="#333333"
android:textSize="15sp" />
<CheckBox
android:id="@+id/CheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:text="" />
</LinearLayout>
</LinearLayout>
我的适配器是一个 SimpleAdapter:
My adapter is a SimpleAdapter:
SimpleAdapter adp = new SimpleAdapter(getApplicationContext(),
hashList, R.layout.posting_detail_question_row, from, to);
Log.v("MyLog", "after simple adapter");
setListAdapter(adp);
推荐答案
您需要使用 findViewById 来获取指向您的复选框的指针:
You need to use findViewById to get a pointer to your checkbox:
protected void onListItemClick(ListView l, View v, int position, long id) {
Toast.makeText(getApplicationContext(), "You have selected item no."
+(position+1)+"", Toast.LENGTH_SHORT).show();
super.onListItemClick(l, v, position, id);
if (v != null) {
CheckBox checkBox = (CheckBox)v.findViewById(R.id.Checkbox);
checkBox.setChecked(!checkBox.isChecked());
}
}
如果您收到 onClick 事件,则 v
永远不应该为 null,但我已经进行了适当的检查.
If you are recieving the onClick event then v
should never be null but I have put on the appropriate checks.
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