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| package com.songsapp.songsapp;
import android.content.Intent;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.FilterQueryProvider;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
public class SongsAct extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener{
DBHelper sqlHelper;
SQLiteDatabase db;
Cursor userCursor;
SimpleCursorAdapter userAdapter;
ListView userList;
EditText userFilter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_songs);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
userList = findViewById(R.id.userList);
userFilter = findViewById(R.id.userFilter);
sqlHelper = new DBHelper(getApplicationContext());
// создаем базу данных
sqlHelper.create_db();
userList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> headers, View v, int position, long id) {
//выход в новое Activity
Intent intent = new Intent(SongsAct.this, firstArtist.class);
startActivity(intent1);
}
});
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);
}
@Override
public void onResume() {
super.onResume();
try {
db = sqlHelper.open();
userCursor = db.rawQuery("select * from " + DBHelper.TABLE, null);
String[] headers = new String[]{DBHelper.COLUMN_NAME};
int[] to = new int[]{R.id.text1};
userAdapter = new SimpleCursorAdapter(this, R.layout.list_item,
userCursor, headers, to, 0);
// если в текстовом поле есть текст, выполняем фильтрацию
// данная проверка нужна при переходе от одной ориентации экрана к другой
if(!userFilter.getText().toString().isEmpty())
userAdapter.getFilter().filter(userFilter.getText().toString());
// установка слушателя изменения текста
userFilter.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) { }
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
// при изменении текста выполняем фильтрацию
public void onTextChanged(CharSequence s, int start, int before, int count) {
userAdapter.getFilter().filter(s.toString());
}
});
// устанавливаем провайдер фильтрации
userAdapter.setFilterQueryProvider(new FilterQueryProvider() {
@Override
public Cursor runQuery(CharSequence constraint) {
if (constraint == null || constraint.length() == 0) {
return db.rawQuery("select * from " + DBHelper.TABLE, null);
}
else {
return db.rawQuery("select * from " + DBHelper.TABLE + " where " +
DBHelper.COLUMN_NAME + " like ?", new String[]{"%" + constraint.toString() + "%"});
}
}
});
userList.setAdapter(userAdapter);
}
catch (SQLException ex){}
}
@Override
public void onDestroy(){
super.onDestroy();
// Закрываем подключение и курсор
db.close();
userCursor.close();
}
@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.main, 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;
}
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_artists) {
Intent intent = new Intent(this, SongsAct.class);
startActivity(intent);
return true;
} else if (id == R.id.nav_favorite) {
Intent intent = new Intent(this, Favorite.class);
startActivity(intent);
} else if (id == R.id.nav_history) {
} else if (id == R.id.nav_settings) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
} |