我在listiview中的图片select/unselect
中遇到了问题。
就我而言,
ByDefault->image color(Yellow)
First click->image color(Orange)
Second click->image color(Yellow)
如果用户点击途中然后完美,但是当用户第一次点击第一张图片并第二次点击第二张图片时,两种图像颜色都是橙色(这是问题)。
在我的情况下,一次只有一种图像颜色为橙色(表示已选中)。
答案 0 :(得分:1)
<强> selector.xml 强>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_activated="true" android:drawable="@drawable/item_focus" />
<item android:drawable="@android:color/transparent" />
</selector>
listview项目的布局
<ImageView
android:id="@+id/image"
android:layout_width="100dp"
android:layout_height="100dp"
android:padding="5dp" />
和最后一个,将listview选择模式设置为SINGLE
list.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
2。如果您设法支持预装HoneyComb,则必须编写自己的布局工具。您这样做是为了使用选中状态进行解决。让我们举一个使用LinearLayout的例子(你可以和其他人一样)。
package com.example.listviewactivestate;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;
import android.widget.LinearLayout;
public class CustomLinearLayout extends LinearLayout implements Checkable {
private static final int[] CHECKED_STATE_SET = { android.R.attr.state_checked };
private boolean checked = false;
public CustomLinearLayout (Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomLinearLayout (Context context) {
super(context);
}
@Override
public boolean isChecked() {
return checked;
}
@Override
public void setChecked(boolean checked) {
this.checked = checked;
refreshDrawableState();
// Propagate to childs
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child instanceof Checkable) {
((Checkable) child).setChecked(checked);
}
}
}
@Override
protected int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
if (isChecked()) {
mergeDrawableStates(drawableState, CHECKED_STATE_SET);
}
return drawableState;
}
@Override
public void toggle() {
this.checked = !this.checked;
}
}
在xml中使用此自定义视图
<?xml version="1.0" encoding="utf-8"?>
<com.example.listviewactivestate.CustomLinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/selector"
>
<ImageView
android:id="@+id/image"
android:layout_width="100dp"
android:layout_height="100dp"
android:padding="5dp" />
</com.example.listviewactivestate.CustomLinearLayout >
将state_activated
更改为state_checked
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:drawable="@drawable/item_focus" />
<item android:drawable="@android:color/transparent" />
</selector>
还将listview选择模式设置为SINGLE
。如果它不起作用,请像这样添加onItemClickEvent
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
list.setItemChecked(position, true);//make sure click item is set to checked.
}
});