Multi Selection
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package com.material.components.activity.list;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.view.ActionMode;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.appcompat.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.material.components.R;
import com.material.components.adapter.AdapterListInbox;
import com.material.components.data.DataGenerator;
import com.material.components.model.Inbox;
import com.material.components.utils.Tools;
import com.material.components.widget.LineItemDecoration;
import java.util.List;
public class ListMultiSelection extends AppCompatActivity {
private View parent_view;
private RecyclerView recyclerView;
private AdapterListInbox mAdapter;
private ActionModeCallback actionModeCallback;
private ActionMode actionMode;
private Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_multi_selection);
parent_view = findViewById(R.id.lyt_parent);
initToolbar();
initComponent();
Toast.makeText(this, "Long press for multi selection", Toast.LENGTH_SHORT).show();
}
private void initToolbar() {
toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setNavigationIcon(R.drawable.ic_menu);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Inbox");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Tools.setSystemBarColor(this, R.color.red_600);
}
private void initComponent() {
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.addItemDecoration(new LineItemDecoration(this, LinearLayout.VERTICAL));
recyclerView.setHasFixedSize(true);
List items = DataGenerator.getInboxData(this);
//set data and list adapter
mAdapter = new AdapterListInbox(this, items);
recyclerView.setAdapter(mAdapter);
mAdapter.setOnClickListener(new AdapterListInbox.OnClickListener() {
@Override
public void onItemClick(View view, Inbox obj, int pos) {
if (mAdapter.getSelectedItemCount() > 0) {
enableActionMode(pos);
} else {
// read the inbox which removes bold from the row
Inbox inbox = mAdapter.getItem(pos);
Toast.makeText(getApplicationContext(), "Read: " + inbox.from, Toast.LENGTH_SHORT).show();
}
}
@Override
public void onItemLongClick(View view, Inbox obj, int pos) {
enableActionMode(pos);
}
});
actionModeCallback = new ActionModeCallback();
}
private void enableActionMode(int position) {
if (actionMode == null) {
actionMode = startSupportActionMode(actionModeCallback);
}
toggleSelection(position);
}
private void toggleSelection(int position) {
mAdapter.toggleSelection(position);
int count = mAdapter.getSelectedItemCount();
if (count == 0) {
actionMode.finish();
} else {
actionMode.setTitle(String.valueOf(count));
actionMode.invalidate();
}
}
private class ActionModeCallback implements ActionMode.Callback {
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
Tools.setSystemBarColor(ListMultiSelection.this, R.color.blue_grey_700);
mode.getMenuInflater().inflate(R.menu.menu_delete, menu);
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_delete) {
deleteInboxes();
mode.finish();
return true;
}
return false;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
mAdapter.clearSelections();
actionMode = null;
Tools.setSystemBarColor(ListMultiSelection.this, R.color.red_600);
}
}
private void deleteInboxes() {
List selectedItemPositions = mAdapter.getSelectedItems();
for (int i = selectedItemPositions.size() - 1; i >= 0; i--) {
mAdapter.removeData(selectedItemPositions.get(i));
}
mAdapter.notifyDataSetChanged();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_search_setting, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
finish();
} else {
Toast.makeText(getApplicationContext(), item.getTitle(), Toast.LENGTH_SHORT).show();
}
return super.onOptionsItemSelected(item);
}
}