我尝试在里面CheckBox
使用RelativeLayout
withTextView
和FrameLayout
(在背景上使用选择器)编写我自己的。
我认为它需要父母的可检查状态,但为什么要setDuplicateParentStateEnabled(true)
检查我不知道。FrameLayout
RelativeLayout
public class MyCheckbox extends RelativeLayout implements OnClickListener, Checkable
{
private static final int ID_CHECKBOX = -1234411;
private static final int ID_TEXTVIEW = -1234412;
private static final int ID_PARENT = -1234413;
private TextView textView;
private FrameLayout checkBox;
private boolean isChecked;
public MyCheckbox(Context context)
{
this(context, null);
}
public MyCheckbox(Context context, AttributeSet attrs)
{
super(context, attrs);
LayoutParams lp;
setId(ID_PARENT);
setOnClickListener(this);
// checkBox
checkBox = new FrameLayout(context);
checkBox.setId(ID_CHECKBOX);
checkBox.setDuplicateParentStateEnabled(true);
// textView
textView = new TextView(context);
textView.setId(ID_TEXTVIEW);
textView.setOnClickListener(this);
boolean checkboxToRight = false;
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MaptrixCheckbox);
for (int i = 0; i < a.getIndexCount(); i++)
{
int attr = a.getIndex(i);
switch (attr)
{
case R.styleable.MyCheckbox_checkboxToRight:
checkboxToRight = a.getBoolean(attr, false);
break;
case R.styleable.MyCheckbox_checkMark:
checkBox.setBackgroundDrawable(a.getDrawable(attr));
break;
case R.styleable.MyCheckbox_text:
textView.setText(a.getText(attr));
break;
}
}
a.recycle();
if (checkboxToRight)
{
lp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.addRule(ALIGN_PARENT_RIGHT);
lp.addRule(CENTER_VERTICAL);
lp.setMargins(margins, 0, margins, 0);
addView(checkBox, lp);
lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
lp.addRule(CENTER_VERTICAL);
lp.addRule(LEFT_OF, ID_CHECKBOX);
addView(textView, lp);
}
else
{
lp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.addRule(CENTER_VERTICAL);
lp.setMargins(margins, 0, margins, 0);
addView(checkBox, lp);
lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
lp.addRule(CENTER_VERTICAL);
lp.addRule(RIGHT_OF, ID_CHECKBOX);
addView(textView, lp);
}
refreshDrawableState();
}
@Override
public void onClick(View v)
{
int id = v.getId();
if (id == ID_PARENT || id == ID_TEXTVIEW) toggle();
}
public boolean isChecked()
{
return isChecked;
}
public void setChecked(boolean chacked)
{
isChecked = chacked;
refreshDrawableState();
}
@Override
public void toggle()
{
isChecked = !isChecked;
refreshDrawableState();
}
}