Question

我希望能够根据它们在导航抽屉中的顺序在片段之间上下滑动。这方面的一个例子就是他们用Facebook Messenger做的事情，我们想要在第一个标签和第四个标签之间切换，它会快速浏览第一个，第二个和第三个标签，然后再转到第四个标签。如何在我的应用程序中复制这种动画。（我希望我的上下滑动。）

MainActivity.java

import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.support.design.widget.NavigationView;
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.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    NavigationView navigationView = null;
    Toolbar toolbar = null;

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

        //Disables Orientation throughout the entire application
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        //Set the fragment initially
        WelcomeFragment fragment = new WelcomeFragment();
        android.support.v4.app.FragmentTransaction fragmentTransaction =
                getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container, fragment);
        fragmentTransaction.commit();

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

        navigationView = (NavigationView) findViewById(R.id.nav_view);

        //How to change elements in the header programatically
        View headerView = navigationView.getHeaderView(0);
        TextView emailText = (TextView) headerView.findViewById(R.id.description);
        emailText.setText("Scouting Application");

        navigationView.setNavigationItemSelectedListener(this);
    } //End of onCreate

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

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_welcome) {
            //Set the fragment initially
            WelcomeFragment fragment = new WelcomeFragment();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fragment_container, fragment);
            fragmentTransaction.commit();
            // Handle the camera action
        }
        else if (id == R.id.nav_facebook) {
            FacebookFragment fragment = new FacebookFragment();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fragment_container, fragment);
            fragmentTransaction.commit();
        }
        else if (id == R.id.nav_scout) {
            //Set the fragment initially
            ScoutFragment fragment = new ScoutFragment();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fragment_container, fragment);
            fragmentTransaction.commit();
        }
        else if (id == R.id.nav_match) {
            //Set the fragment initially
            MatchFragment fragment = new MatchFragment();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fragment_container, fragment);
            fragmentTransaction.commit();
        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    } //End of onNavigationItemSelected
} //End of class

Answer 1

有一个可以制作这种动画的库。我正在寻找相同类型的过渡效果，这可能对您有所帮助。

FragmentTransactionExtended

这里还有另一个代码：

@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();

switch(id) {
    // ...

    // up button
    case android.R.id.home:
        finish();
        overridePendingTransition(R.anim.activity_back_in, R.anim.activity_back_out);
        return true;
}

return super.onOptionsItemSelected(item);
}

Android - 在导航抽屉片段之间滑动的动画

1 个答案: