小编mar*_*ean的帖子

新的开发人员,希望有人可以帮助我,我看起来似乎无法找到我的问题的答案,我有我的所有textviews @strings但我想知道,我有一个textview,我的xml在android工作室有一个空值ie android:text="",我必须将其留空,因为这是显示字符串数组的结果.

所以我的问题是如何@string在空的时候将它添加到值？抱歉这个noobish问题,但我找不到我的问题的答案!

谢谢

我正在尝试使我的导航抽屉平稳运行，因为在打开和关闭抽屉时会出现卡顿/延迟。我希望这能完美运行。有什么帮助吗？

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        final MediaPlayer mp = MediaPlayer.create(this, R.raw.firsteps);
        mp.start();


        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.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setItemIconTintList(null);
        navigationView.setNavigationItemSelectedListener(this);


        FragmentManager fm = getSupportFragmentManager();
        fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit();

    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed(); …