Android 使用Recyclerview将GridView切换到Listview,反之亦然
我正在使用recyclerview从firebase数据库检索数据,该数据库运行良好,但我已将默认布局管理器设置为线性,但我希望用户必须能够从listview切换到gridview,而gridview不起作用。当我点击gridview项目时,它并没有改变状态。它什么也不做。作为linearlayout管理器,它保持默认状态Android 使用Recyclerview将GridView切换到Listview,反之亦然,android,firebase,android-recyclerview,Android,Firebase,Android Recyclerview,我正在使用recyclerview从firebase数据库检索数据,该数据库运行良好,但我已将默认布局管理器设置为线性,但我希望用户必须能够从listview切换到gridview,而gridview不起作用。当我点击gridview项目时,它并没有改变状态。它什么也不做。作为linearlayout管理器,它保持默认状态 public class Welcome extends AppCompatActivity implements NavigationView.OnNavi
public class Welcome extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
FirebaseDatabase database;
DatabaseReference category;
TextView txtfullname;
RecyclerView recycler_menu;
RecyclerView.LayoutManager layoutManager;
FirebaseRecyclerAdapter<Category,MenuViewHolder> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("Menu");
setSupportActionBar(toolbar);
//init firebase
database = FirebaseDatabase.getInstance();
category=database.getReference("Category");
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
//set name for user
View headerView= navigationView.getHeaderView(0);
txtfullname= headerView.findViewById(R.id.nav_view);
// txtfullname.setText(Common.currentUser.getName());
//Load menu using firebase ui to bind data from frebase to recyclerview
recycler_menu =findViewById(R.id.recyclerview);
recycler_menu.setHasFixedSize(true);
layoutman();
recycler_menu.setLayoutManager(layoutManager);
loadMenu();
}
private void layoutman() {
layoutManager=new LinearLayoutManager(this);
}
private void loadMenu() {
adapter =new FirebaseRecyclerAdapter<Category, MenuViewHolder>(Category.class,R.layout.menu_item,MenuViewHolder.class,category) {
@Override
protected void populateViewHolder(MenuViewHolder viewHolder, Category model, int position) {
viewHolder.txtMenuName.setText(model.getName());
Picasso.with(getBaseContext()).load(model.getImage())
.into(viewHolder.imageView);
final Category clickItem = model;
viewHolder.setItemClickListener(new ItemClickListener() {
@Override
public void onClick(View view, int position, boolean isLongClick) {
Toast.makeText(Welcome.this,""+clickItem.getName(),Toast.LENGTH_SHORT).show();
}
});
}
};
recycler_menu.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.welcome, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if (id==R.id.list){
layoutman();
adapter.notifyDataSetChanged();
return true;
}
if (id==R.id.grid){
layoutManager=new GridLayoutManager(getApplicationContext(),2);
adapter.notifyDataSetChanged();
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_menu) {
// Handle the camera action
} else if (id == R.id.nav_cart) {
} else if (id == R.id.nav_orders) {
} else if (id == R.id.nav_log_out) {
} else if (id == R.id.share) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
公共类欢迎活动
实现NavigationView.OnNavigationItemSelectedListener{
Firebase数据库;
数据库参考类别;
TextView txtfullname;
RecyclerView recycler_菜单;
RecyclerView.LayoutManager LayoutManager;
FirebaseRecyclerAdapter适配器;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
Toolbar Toolbar=(Toolbar)findViewById(R.id.Toolbar);
工具栏。设置标题(“菜单”);
设置支持操作栏(工具栏);
//init firebase
database=FirebaseDatabase.getInstance();
category=database.getReference(“category”);
FloatingActionButton fab=(FloatingActionButton)findViewById(R.id.fab);
fab.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
Snackbar.make(查看“替换为您自己的操作”,Snackbar.LENGTH\u LONG)
.setAction(“Action”,null).show();
}
});
抽屉布局抽屉=(抽屉布局)findViewById(R.id.抽屉布局);
ActionBarDrawerToggle切换=新建ActionBarDrawerToggle(
这,抽屉,工具栏,R.string.navigation\u drawer\u open,R.string.navigation\u drawer\u close);
抽屉。添加抽屉链接器(切换);
toggle.syncState();
NavigationView NavigationView=(NavigationView)findViewById(R.id.nav_视图);
navigationView.setNavigationItemSelectedListener(此);
//为用户设置名称
View headerView=navigationView.getHeaderView(0);
txtfullname=headerView.findviewbyd(R.id.nav_视图);
//txtfullname.setText(Common.currentUser.getName());
//使用firebase ui将数据从frebase绑定到recyclerview的加载菜单
回收器菜单=findViewById(R.id.recyclerview);
recycler_菜单。setHasFixedSize(真);
layoutman();
回收器菜单。设置布局管理器(布局管理器);
loadMenu();
}
私人空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置空置{
layoutManager=新的LinearLayoutManager(此);
}
私有void加载菜单(){
适配器=新的FirebaseRecyclerAdapter(Category.class、R.layout.menu\u项、MenuViewHolder.class、Category){
@凌驾
受保护的void populateViewHolder(MenuViewHolder、类别模型、int位置){
viewHolder.txtMenuName.setText(model.getName());
Picasso.with(getBaseContext()).load(model.getImage())
.into(viewHolder.imageView);
最终类别点击项目=模型;
viewHolder.setItemClickListener(新建ItemClickListener(){
@凌驾
公共void onClick(视图、int位置、布尔值isLongClick){
Toast.makeText(Welcome.this,“+”单击item.getName(),Toast.LENGTH_SHORT.show();
}
});
}
};
回收器菜单。设置适配器(适配器);
adapter.notifyDataSetChanged();
}
@凌驾
public void onBackPressed(){
抽屉布局抽屉=(抽屉布局)findViewById(R.id.抽屉布局);
if(抽屉isDrawerOpen(重力压缩机启动)){
抽屉。关闭抽屉(重力压缩机启动);
}否则{
super.onBackPressed();
}
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(右菜单。欢迎,菜单);
返回true;
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
//noinspection SimplifiableIf语句
if(id==R.id.action\u设置){
返回true;
}
if(id==R.id.list){
layoutman();
adapter.notifyDataSetChanged();
返回true;
}
if(id==R.id.grid){
layoutManager=新的GridLayoutManager(getApplicationContext(),2);
adapter.notifyDataSetChanged();
返回true;
}
返回super.onOptionsItemSelected(项目);
}
@SuppressWarnings(“StatementWithEmptyBody”)
@凌驾
公共布尔值onNavigationItemSelected(MenuItem项){
//处理导航视图项单击此处。
int id=item.getItemId();
if(id==R.id.nav_菜单){
//处理相机的动作
}else if(id==R.id.nav_车){
}else if(id==R.id.nav_订单){
}else if(id==R.id.nav\u注销){
}else if(id==R.id.share){
}
抽屉布局抽屉=(抽屉布局)findViewById(R.id.抽屉布局);
抽屉。关闭抽屉(重力压缩机启动);
返回true;
}
}
您做得很好,但需要再次在recyclerview上设置布局管理器,否则它将不起作用,之后只需调用notifydatasetchanged(),然后它就应该起作用了。您必须在单击事件时更改布局管理器,例如,对于布局管理器应该显示的Listview数据
compile 'com.android.support:recyclerview-v7:23.2.0'
下面是栅格视图布局管理器的代码
RecyclerView recyclerView = (RecyclerView)findViewById(R.id.card_recycler_view);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getApplicationContext(),2);
recyclerView.setLayoutManager(layoutManager);
对于简单列表视图
RecyclerView recyclerView = (RecyclerView)findViewById(R.id.card_recycler_view);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(layoutManager);
然后您必须分别更改列表视图,希望这将对您有所帮助