将按钮链接到Android中的现有活动
我有一个已经为nav抽屉创建的活动。我想一个button为search在连接快速navigation我并不需要打开drawer搜索这里是我的代码如下：将按钮链接到Android中的现有活动
main.xml中
<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/nav_search"
android:icon="@drawable/ic_search"
android:title="@string/search"
app:showAsAction="always" />
</menu>
上午主要活动如下。
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { Fragment currFragment;
boolean isLoggedPrev, isLoggedCurrent;
NavigationView navigationView;
boolean doubleBackToExitPressedOnce = false;
public static int offsetY = 0;
private AdView adView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
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) {
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
}
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (UserAccessSession.getInstance(MainActivity.this).getUserSession() != null) {
isLoggedCurrent = true;
} else {
isLoggedCurrent = false;
}
if (isLoggedCurrent != isLoggedPrev) {
isLoggedPrev = isLoggedCurrent;
checkLoginNavigation();
}
}
};
drawer.setDrawerListener(toggle);
toggle.syncState();
TypedValue tv = new TypedValue();
if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
offsetY = TypedValue.complexToDimensionPixelSize(tv.data, getResources().getDisplayMetrics());
Config.OFFSET_Y = offsetY;
}
showFragment(new HomeFragment());
showAds();
}
public void checkLoginNavigation() {
navigationView.getMenu().clear();
UserSession userSession = UserAccessSession.getInstance(this).getUserSession();
if (userSession != null) {
navigationView.inflateMenu(R.menu.activity_main_drawer_logged);
} else {
navigationView.inflateMenu(R.menu.activity_main_drawer_not_logged);
}
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
if (doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
doubleBackToExitPressedOnce = true;
Toast.makeText(this, R.string.tap_back_again_to_exit, Toast.LENGTH_SHORT).show();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
doubleBackToExitPressedOnce = false;
}
}, 2000);
}
}
@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();
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
Intent i;
int id = item.getItemId();
if(id == R.id.nav_home) {
showFragment(new HomeFragment());
setTitle(R.string.app_name);
}
if(id == R.id.nav_categories) {
showFragment(new CategoryFragment());
setTitle(R.string.categories);
}
if(id == R.id.nav_favorites) {
showFragment(new FavoritesFragment());
setTitle(R.string.favorites);
}
if(id == R.id.nav_featured) {
showFragment(new FeaturedFragment());
setTitle(R.string.featured);
}
if(id == R.id.nav_search) {
i = new Intent(this, SearchActivity.class);
startActivity(i);
}
if(id == R.id.nav_news) {
showFragment(new NewsFragment());
setTitle(R.string.latest_news);
}
if(id == R.id.nav_about_us) {
showFragment(new AboutUsFragment());
setTitle(R.string.about_us);
}
if(id == R.id.nav_terms_condition) {
showFragment(new TermsConditionFragment());
setTitle(R.string.terms_and_conditions);
}
if(id == R.id.nav_settings) {
i = new Intent(this, SettingsActivity.class);
startActivity(i);
}
if(id == R.id.nav_login) {
i = new Intent(this, LoginActivity.class);
startActivity(i);
}
if(id == R.id.nav_profile) {
i = new Intent(this, ProfileActivity.class);
startActivity(i);
}
if(id == R.id.nav_my_events) {
i = new Intent(this, MyEventsActivity.class);
startActivity(i);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
public void showFragment(Fragment fragment) {
if (currFragment != null && fragment.getClass().equals(currFragment.getClass()))
return;
currFragment = fragment;
FragmentManager fragmentManager = this.getSupportFragmentManager();
if (fragmentManager == null)
return;
FragmentTransaction ft = fragmentManager.beginTransaction();
if (ft == null)
return;
ft.replace(R.id.content_frame, fragment).commitAllowingStateLoss();
}
我想，当我点击它加载搜索，这是目前正在使用的navigation drawer活动搜索按钮爱。
回答：
FYI
android:id="@+id/nav_search"是MenuItem不是NavigationItem一部分从onNavigationItemSelected()删除和添加到onOptionsItemSelected()
试试这个
@Override public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.nav_search) {
i = new Intent(this, SearchActivity.class);
startActivity(i);
return true;
}
return super.onOptionsItemSelected(item);
}
回答：
其菜单项没有NavigationItem。
@Override public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.nav_search) {
// do your stuff here
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.yourMenu,menu);
return super.onCreateOptionsMenu(menu);
}
以上是 将按钮链接到Android中的现有活动 的全部内容， 来源链接： utcz.com/qa/261121.html
