开源项目地址:https://github.com/open-android/DynamicGridView
运行效果
使用步骤
1. 在project的build.gradle添加如下代码(如下图)
allprojects { repositories { ... maven { url "https://jitpack.io" } } }
2. 在Module的build.gradle添加依赖
compile 'com.github.open-android:DynamicGridView:0.1.0'
3. 复制如下代码到xml
<org.askerov.dynamicgrid.DynamicGridView android:id="@+id/dynamic_grid" android:layout_height="wrap_content" android:layout_width="match_parent" android:numColumns="@integer/column_count" />
4. 复制如下代码到Activity
gridView = (DynamicGridView) findViewById(R.id.dynamic_grid);// 第一个参数:上下文// 第二个参数:adapter展示需要用到的集合数据// 第三个参数:gridview一共有多少列gridView.setAdapter(new MyDynamicGridAdapter(this, itemsList, 3)); gridView.setOnDragListener(new DynamicGridView.OnDragListener() { @Override public void onDragStarted(int position) { Log.d(TAG, "drag started at position " + position); } @Override public void onDragPositionsChanged(int oldPosition, int newPosition) { Log.d(TAG, String.format("drag item position changed from %d to %d", oldPosition, newPosition)); } }); gridView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { gridView.startEditMode(position); return true; } }); gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(GridActivity.this, parent.getAdapter().getItem(position).toString(), Toast.LENGTH_SHORT).show(); } }); @Override public void onBackPressed() { if (gridView.isEditMode()) { gridView.stopEditMode(); } else { super.onBackPressed(); //进行数据持久化操作 } }
细节注意:
当前开源项目只实现了拖拽特效,拖拽完成退出应用之后并没有实现数据持久化功能,如需要进行数据的持久化,需要监听返回按钮在else方法实现数据持久化操作。
5. 复制如下代码到Adapter
public class CheeseDynamicAdapter extends BaseDynamicGridAdapter {public CheeseDynamicAdapter(Context context, List<?> items, int columnCount) { super(context, items, columnCount); }@Overridepublic View getView(int position, View convertView, ViewGroup parent) { CheeseViewHolder holder; if (convertView == null) { convertView = LayoutInflater.from(getContext()).inflate(R.layout.item_grid, null); holder = new CheeseViewHolder(convertView); convertView.setTag(holder); } else { holder = (CheeseViewHolder) convertView.getTag(); } holder.build(getItem(position).toString()); return convertView; }private class CheeseViewHolder { private TextView titleText; private ImageView image; private CheeseViewHolder(View view) { titleText = (TextView) view.findViewById(R.id.item_title); image = (ImageView) view.findViewById(R.id.item_img); } void build(String title) { titleText.setText(title); image.setImageResource(R.mipmap.ic_launcher); } }
}
细节注意:
必须继承BaseDynamicGridAdapter。
作者:马伟奇
链接:https://www.jianshu.com/p/80a423f662a4