最火Android开源项目DynamicGridView使用
开源项目地址:https://github.com/open-android/DynamicGridView
运行效果
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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);
}
@Override
public 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。
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详细的使用方法在DEMO里面都演示啦,如果你觉得这个库还不错,请赏我一颗star吧~~~
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