Question

我遇到了一个问题，即DrawerLayout没有顺利关闭，它在中间停留了一段时间，它在完成替换片段后完全关闭。在编码中，我在替换fragment（productList类）之前关闭DrawerLayout。在productList类中，它调用asynctask从服务器获取所有产品列表，同时运行进度条。理想情况下，当用户单击菜单时，DrawerLayout将立即关闭，productList片段将加载所有产品列表。在我看来，DrawerLayout close事件等待productList＆＃39; s asynctask。任何建议都非常感谢。

public class MainActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener, View.OnClickListener {

    public String tag = "MainActivity";
    Context mContext;

    //User Object
    User user;

    //Control
    TextView txtName, txtPosition, txtLogout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mContext = this;
        user = Constants.getUser();

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);


         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 Header
         View headerView = navigationView.getHeaderView(0);
         txtName = (TextView) headerView.findViewById(R.id.nav_header_main_name) ;
         txtName.setText(user.getName().toString());
         txtLogout = (TextView) headerView.findViewById(R.id.nav_header_main_logout);
         txtLogout.setOnClickListener(this);
         navigationView.setNavigationItemSelectedListener(this);

        //Add Menu in navigationView
        Menu myMenu = navigationView.getMenu();
        myMenu.clear();
        myMenu.add(0,Integer.parseInt("01"),0,"Product List");



    }

    @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) {
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {

    //close drawer
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);

    // replace fragment
    int id = item.getItemId();
    FragmentManager fragmentManager = getSupportFragmentManager();
    if(Constants.DEBUG) {
        Toast.makeText(mContext, " Menu Id " + String.valueOf(id), Toast.LENGTH_LONG).show();
    }

    fragmentManager.beginTransaction()
            .replace(R.id.container,new productList())
            .commit();


         return true;
    }
    @Override
    public void onClick(View v) {
        //Log out onclick
        if(v.getId() == R.id.nav_header_main_logout){
            this.finish();
        }

    }

}

Answer 1

这可能发生在导航抽屉的动画中，并且片段的创建同时发生。您可以通过稍微延迟启动片段来解决它 -

handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        // replace fragment
        int id = item.getItemId();
        FragmentManager fragmentManager = getSupportFragmentManager();
        if(Constants.DEBUG) {
            Toast.makeText(mContext, " Menu Id " + String.valueOf(id), Toast.LENGTH_LONG).show();
        }

        fragmentManager.beginTransaction()
                .replace(R.id.container,new productList())
                .commit();
    }
}, 300);

Android DrawerLayout不关闭直到片段被替换

1 个答案: