将Button链接到android中的现有活动 _Android

一箫一剑平生意，负尽狂名十五年。这篇文章主要讲述将Button链接到android中的现有活动相关的知识，希望能为你提供帮助。
我有一个已经为nav抽屉装箱的活动。我想连接一个button为search快速navigation，因为我不需要打开drawer进行搜索这里是我的代码如下：
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>

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(); }

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我希望当我点击搜索按钮时，它会加载搜索活动，navigation drawer目前正在使用该搜索活动。
答案【将Button链接到android中的现有活动】FYI
android:id="@+id/nav_search"是MenuItem不是NavigationItem的一部分从你的onNavigationItemSelected()删除它并添加到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); }

另一答案它的MenuItem不是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); }