this is a draggable flow layout lib (android 可拖拽的流布局库) . Sample apk/示例app
- 1, 类似可拖拽的GridView. 不过gridView 宽度/个数是固定的。 这个布局item宽度是不定的（放不下自动换行）。
- 2，长按item拖拽，如果要处理点击事件请调用。
mDragflowLayout.setOnItemClickListener(new ClickToDeleteItemListenerImpl(R.id.iv_close){
//点击删除成功时回调
@Override
protected void onDeleteSuccess(DragFlowLayout dfl, View child, Object data) {
//your code
}
});- 3，可嵌套ScrollerView. demo就是。
- 4, 默认均可拖拽，如果想禁止某些Item拖拽请实现 {@link IDraggable} 接口 .
- 5, 支持预存储一定个数的item view. 以避免频繁创建.
//预存指定个数的Item. 这些Item会反复使用
mDragflowLayout.prepareItemsByCount(10);- 6, 1.5.0 新增 拖拽状态监听器 和 view观察者。
//设置拖拽状态监听器
mDragflowLayout.setOnDragStateChangeListener(new DragFlowLayout.OnDragStateChangeListener() {
@Override
public void onDragStateChange(DragFlowLayout dfl, int dragState) {
System.out.println("on drag state change : dragState = " + dragState);
}
});
//添加view观察者
mDragflowLayout.addViewObserver(new IViewObserver() {
@Override
public void onAddView(View child, int index) {
Logger.i(TAG, "onAddView", "index = " + index);
}
@Override
public void onRemoveView(View child, int index) {
Logger.i(TAG, "onRemoveView", "index = " + index);
}
});- 1, 导入下面的gradle 配置。并在xml中添加配置
//gradle
repositories {
jcenter()
}
compile 'com.heaven7.android.dragflowlayout:dragflowlayout:1.8.3' <com.heaven7.android.dragflowlayout.DragFlowLayout
android:id="@+id/drag_flowLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</com.heaven7.android.dragflowlayout.DragFlowLayout>- 2，设置点击事件处理器 和 数据适配器.
//用这个处理点击事件
mDragflowLayout.setOnItemClickListener(new ClickToDeleteItemListenerImpl(R.id.iv_close){
@Override
protected void onDeleteSuccess(DragFlowLayout dfl, View child, Object data) {
//your code
}
});
//DragAdapter 泛型参数就是为了每个Item绑定一个对应的数据。通常很可能是json转化过来的bean对象
mDragflowLayout.setDragAdapter(new DragAdapter<TestBean>() {
@Override //获取你的item布局Id
public int getItemLayoutId() {
return R.layout.item_drag_flow;
}
//绑定对应item的数据
@Override
public void onBindData(View itemView, int dragState, TestBean data) {
itemView.setTag(data);
TextView tv = (TextView) itemView.findViewById(R.id.tv_text);
tv.setText(data.text);
//iv_close是关闭按钮。只有再非拖拽空闲的情况下才显示
itemView.findViewById(R.id.iv_close).setVisibility(
dragState!= DragFlowLayout.DRAG_STATE_IDLE
&& data.draggable ? View.VISIBLE : View.INVISIBLE);
}
//根据指定的child获取对应的数据。
@NonNull
@Override
public TestBean getData(View itemView) {
return (TestBean) itemView.getTag();
}
});- 3, item管理： 对item的增删改查-,即CRUD. 通过api： mDragflowLayout.getDragItemManager()。 即可得到DragItemManager.
- 4, 禁止个别Item拖拽。
//数据实体实现IDraggable (是否可拖拽) 接口，并且 isDraggable 为false即可
private static class TestBean implements IDraggable{
String text;
boolean draggable = true;
public TestBean(String text) {
this.text = text;
}
@Override
public boolean isDraggable() {
return draggable;
}
}- 5, 如果要使用布局动画，请用ViewGroup.setLayoutTransaction(...) .
- 6, 更多详情请参见demo.
repositories {
jcenter()
}
compile 'com.heaven7.android.dragflowlayout:dragflowlayout:1.8.3' //设置拖拽状态监听器
public void setOnDragStateChangeListener(OnDragStateChangeListener l)
//获取拖拽状态
public @DragState int getDragState()
//设置Item点击事件处理器
public void setOnItemClickListener(OnItemClickListener l)
//设置数据适配器
void setDragAdapter(DragAdapter<T> adapter)
//获取Item管理器(方便CRUD-增删改查 item)
public DragItemManager getDragItemManager()
//设置全局是否可拖拽。如果false,则无法长按拖拽了。
public void setDraggable(boolean draggable)
//设置缓存view的个数。可避免重复创建item view
public void prepareItemsByCount(int count)
//标记拖拽结束, 内部会自动将拖拽状态改为 DRAG_STATE_IDLE .
public void finishDrag();- 1, version(1.5.0)
- （1) , 增加拖拽状态监听器 和 child view观察者
- 2, version(1.5.1)
- （1) , reuse item view for DragItemManager(inner class)
- 3, version(1.5.5)
- （1) , fix reuse item view bug.
- (2) , add method onDeleteSuccess(...) for ClickToDeleteItemListenerImpl
mDragflowLayout.setOnItemClickListener(new ClickToDeleteItemListenerImpl(R.id.iv_close){
@Override
protected void onDeleteSuccess(DragFlowLayout dfl, View child, Object data) {
//your code
}
});- 4, version(1.6.2)
- （1) , fix bug of issue(#1)
- 5, version(1.8.3) fix a bug of multi fask click with touch scrol (解决多次点击+滑动的问题)
- 1 ，最开始我打算用DragHelper做的。但是发现不能将拖拽的child 渲染在最上面。
- 2, RecyclerView的自定义LayoutManager + onItem touch / 应该也可以.
- if you have any question or good suggestion about this, please tell me... Thanks!
- heaven7
- email: [email protected] or [email protected]
i like technology. especially the open-source technology.And previous i didn't contribute to it caused by i am a little lazy, but now i really want to do some for the open-source. So i hope to share and communicate with the all of you.
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