机器人:延长CheckedTextView源$ C $ C [英] android: extending CheckedTextView source code
问题描述
我想在谁已经拥有了文本和一个复选框一个ListView添加一个图标的项目:simple_list_item_multiple_choice.xml这不过是一个< CheckedTextView>与某些属性标签
I was thinking of adding an icon to the items in a ListView who already has a text and a checkbox: simple_list_item_multiple_choice.xml which is nothing but a < CheckedTextView > tag with some attributes
我知道了自定义适配器解决方案,但我真的希望,更直观的解决方案。
我知道与源$ C $ C打不直观,但我的意思是只是在做这个难易程度:
I'm aware of the custom adapter solution, but I really want and more intuitive solution. I know playing with the source code is not intuitive, but what I meant is the easiness of just doing this:
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, // context
android.R.layout.simple_list_item_multiple_choice, // view for an item in the list
myCursor, // cursor used for populating list items
new String[] {dBHelper.CONTACT_NAME}, // column in cursor we are getting data from
new int[] {android.R.id.text1}); // where to put this data in the item's view
和结果可以像这样采取:
and the results can be taken with something like this:
SparseBooleanArray checkedPositions = lv.getCheckedItemPositions();
写在不同的文件中任何code
with whatever code written in separate files
我的问题是日食不能解析: R.styleable.CheckedTextView 的和的 mPaddingRight 的
在
My problem is that eclipse cannot resolve: R.styleable.CheckedTextView and mPaddingRight in:
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.CheckedTextView, defStyle, 0);
和
Drawable d = a.getDrawable(R.styleable.CheckedTextView_checkMark);
和
boolean checked = a.getBoolean(R.styleable.CheckedTextView_checked, false);
和
mPaddingRight = mCheckMarkWidth + mBasePaddingRight;
d.setState(getDrawableState());
} else {
mPaddingRight = mBasePaddingRight;
}
和
@Override
public void setPadding(int left, int top, int right, int bottom) {
super.setPadding(left, top, right, bottom);
mBasePaddingRight = mPaddingRight;
}
感谢您...:)
推荐答案
如上评论中提到,你不需要去源,如果你想要做的就是添加一个图标到ListView项目。只要创建所描述你想要的一个新的布局。我已经包括下面的例子,但是这是做的只是一种方式。
As mentioned in the comments above, you don't need to go to source if all you want to do is add an icon to the ListView items. Just create a new layout that described what you want. I've included an example below, but that's just one way of doing it.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:paddingLeft="6dp"
android:paddingRight="6dp">
<ImageView
android:id="@+id/icon1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:src="@drawable/ic_launcher" />
<CheckedTextView
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textAppearance="?android:attr/textAppearanceLarge"
android:gravity="center_vertical"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
android:layout_toRightOf="@id/icon1"
/>
</RelativeLayout>
那么,在你的活动code做这样的事情:
then, in your Activity code do something like:
ListView listView = (ListView) findViewById(R.id.listView1);
// I'm just going to use an ArraySdapter, for simplicity...
listView.setAdapter(new ArrayAdapter<String>(this, R.layout.item, android.R.id.text1, getResources().getStringArray(R.array.items)));
// or, for the sake of example (note, not optimized at all)
listView.setAdapter(new ArrayAdapter<String>(this, R.layout.item, android.R.id.text1, getResources().getStringArray(R.array.items)) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
if (position % 2 == 0) {
((ImageView) view.findViewById(R.id.icon1)).setImageResource(R.drawable.ic_launcher);
} else {
((ImageView) view.findViewById(R.id.icon1)).setImageResource(R.drawable.ic_launcher);
}
return view;
}
});
请注意,上面提供了更多的灵活性,但也可能只是增加了一个机器人:drawableLeft归因于CheckedTextView,而不是添加的RelativeLayout和ImageView的的
Note, the above gives more flexibility, but you could also have just added an android:drawableLeft attribute to the CheckedTextView instead of adding the RelativeLayout and ImageView.
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