发布于 2017-10-12 12:36:19 | 146 次阅读 | 评论: 0 | 来源: 网友投递
Android移动端操作系统
Android是一种基于Linux的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由Google公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用“安卓”或“安致”。
Android recycleView的应用和点击事件
效果图:
长按是删除:
下面代码:
MainActivity 类
public class MainActivity extends AppCompatActivity {
RecyclerView rv;
List<String> mList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rv = (RecyclerView) findViewById(R.id.rv);
for (int i = 0; i < 1000; i++) {
mList.add("条目" + i);
}
final MyAdapter adapter = new MyAdapter(this, mList);
adapter.setOnItemClickListener(new MyAdapter.OnItemClickListener() {
@Override
public void onClick(int position) {
Toast.makeText(getBaseContext(), "点击的是" + position + "的itemClick", Toast.LENGTH_SHORT).show();
}
});
adapter.setOnItemLongClickListener(new MyAdapter.OnItemLongClickListener() {
@Override
public void onLongClick(int position) {
//长按删除数据
mList.remove(position);
adapter.notifyDataSetChanged();
}
});
rv.setAdapter(adapter);
//布局管理器
rv.setLayoutManager(new StaggeredGridLayoutManager(5, StaggeredGridLayoutManager.VERTICAL));
}
public static class VH extends RecyclerView.ViewHolder {
TextView tv;
public VH(View itemView) {
super(itemView);
tv = (TextView) itemView.findViewById(android.R.id.text1);
tv.setBackgroundResource(R.drawable.bg);
}
}
}
MyAdapter.java类
public class MyAdapter extends RecyclerView.Adapter<MainActivity.VH> {
Context mContext;
List<String> mList;
public MyAdapter(Context context, List<String> list) {
this.mContext = context;
this.mList = list;
}
@Override
public MainActivity.VH onCreateViewHolder(ViewGroup parent, int viewType) {
return new MainActivity.VH(View.inflate(mContext, android.R.layout.simple_list_item_1, null));
}
@Override
public void onBindViewHolder(MainActivity.VH holder, final int position) {
holder.tv.setText(mList.get(position));
//自己做item点击
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (onItemClickListener != null)
onItemClickListener.onClick(position);
}
});
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if (onItemLongClickListener != null)
onItemLongClickListener.onLongClick(position);
//返回false会在长安结束后继续点击
return true;
}
});
}
@Override
public int getItemCount() {
return mList.size();
}
/**
* 点击
*/
public interface OnItemClickListener {
void onClick(int position);
}
OnItemClickListener onItemClickListener;
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
public interface OnItemLongClickListener {
void onLongClick(int position);
}
OnItemLongClickListener onItemLongClickListener;
public void setOnItemLongClickListener(OnItemLongClickListener onItemLongClickListener) {
this.onItemLongClickListener = onItemLongClickListener;
}
}
activity_main.xml类
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.administrator.lesson10_recyclerview2.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/rv"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
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