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完整的应用程序工作正常，但是当涉及到侧抽屉的过渡或者我们可以说导航菜单不平滑时。它在开启和关闭时会造成延迟。 这是我的主要活动代码。想要使导航菜单的拖曳顺畅
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mHandler = new Handler();
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
navigationView = (NavigationView) findViewById(R.id.nav_view);
navHeader = navigationView.getHeaderView(0);
activityTitles = getResources().getStringArray(R.array.nav_item_activity_titles);
setUpNavigationView();
if (savedInstanceState == null) {
navItemIndex = 0;
CURRENT_TAG = TAG_HOME;
loadHomeFragment();
}
}
private void loadHomeFragment() {
selectNavMenu();
setToolbarTitle();
if (getSupportFragmentManager().findFragmentByTag(CURRENT_TAG) != null) {
drawer.closeDrawers();
return;
}
Runnable mPendingRunnable = new Runnable() {
@Override
public void run() {
Fragment fragment = getHomeFragment();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.setCustomAnimations(android.R.anim.fade_in,
android.R.anim.fade_out);
fragmentTransaction.replace(R.id.frame, fragment, CURRENT_TAG);
fragmentTransaction.commitAllowingStateLoss();
}
};
if (mPendingRunnable != null) {
mHandler.post(mPendingRunnable);
}
drawer.closeDrawers();
invalidateOptionsMenu();
}
private Fragment getHomeFragment() {
switch (navItemIndex) {
case 0:
HomeFragment homeFragment = new HomeFragment();
return homeFragment;
case 1:
HealthFragment healthFragment = new HealthFragment();
return healthFragment;
case 2:
PinFragment pinFragment = new PinFragment();
return pinFragment;
case 3:
SupportFragment supportFragment = new SupportFragment();
return supportFragment;
case 4:
FeedbackFragment feedbackFragment = new FeedbackFragment();
return feedbackFragment;
case 5:
FAQsFragment faQsFragment = new FAQsFragment();
return faQsFragment;
default:
return new HomeFragment();
}
}
private void setToolbarTitle() {
getSupportActionBar().setTitle(activityTitles[navItemIndex]);
}
private void selectNavMenu() {
navigationView.getMenu().getItem(navItemIndex).setChecked(true);
}
private void setUpNavigationView() {
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.home:
navItemIndex = 0;
CURRENT_TAG = TAG_HOME;
break;
case R.id.nav_health:
navItemIndex = 1;
CURRENT_TAG = TAG_HEALTH;
break;
case R.id.nav_pin:
navItemIndex = 2;
CURRENT_TAG = TAG_PIN;
break;
case R.id.nav_support:
navItemIndex = 3;
CURRENT_TAG = TAG_SUPPORT;
break;
case R.id.nav_feedback:
navItemIndex = 4;
CURRENT_TAG = TAG_FEEDBACK;
break;
case R.id.nav_faqs:
navItemIndex = 5;
CURRENT_TAG = TAG_FAQS;
break;
case R.id.nav_chat:
startActivity(new Intent(MainActivity.this, LoginActivity.class));
drawer.closeDrawers();
return true;
case R.id.nav_rate:
Uri uri = Uri.parse("https://play.google.com/store/apps/details?id=com.sega.sonicdash");
Intent goToMarket = new Intent(Intent.ACTION_VIEW, uri);
goToMarket.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY |
Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
try {
startActivity(goToMarket);
} catch (ActivityNotFoundException e) {
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse("https://play.google.com/store/apps/details?id=com.sega.sonicdash")));
}
break;
case R.id.nav_aboutus:
startActivity(new Intent(MainActivity.this, AboutUsActivity.class));
drawer.closeDrawers();
return true;
case R.id.nav_share:
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBody = "Here is the share content body";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Subject Here");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
drawer.closeDrawers();
return true;
case R.id.nav_privacy_policy:
startActivity(new Intent(MainActivity.this, PrivacyPolicyActivity.class));
drawer.closeDrawers();
return true;
default:
navItemIndex = 0;
}
if (menuItem.isChecked()) {
menuItem.setChecked(false);
} else {
menuItem.setChecked(true);
}
menuItem.setChecked(true);
loadHomeFragment();
return true;
}
});
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.openDrawer, R.string.closeDrawer) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
/* My edits */
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
}
};
drawer.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
}
@Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawers();
return;
}
if (shouldLoadHomeFragOnBackPress) {
if (navItemIndex != 0) {
navItemIndex = 0;
CURRENT_TAG = TAG_HOME;
loadHomeFragment();
return;
}
}
super.onBackPressed();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (navItemIndex == 0) {
getMenuInflater().inflate(R.menu.main, menu);
}
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
return super.onOptionsItemSelected(item);
}
}
我在导航菜单切换片段。如何使菜单的这些转换顺利进行。