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我剛開始使用Android Studio,對我而言,一切都相對較新。我爲我的應用程序添加了一個新的導航抽屜活動,但它似乎沒有我的欄上的切換按鈕。我會去啓用它。我可以在導航抽屜的類中看到已經存在切換代碼。我已經在互聯網上搜索了很長時間,我發現的所有內容都是將導航抽屜首先作爲其起始模板的教程,或者是從頭開始主要活動的直接創建。將導航抽屜添加到Android Studio中的我的應用程序
我的主要活動:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.top_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.info) {
Toast.makeText(this,"Information", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(this, Information.class);
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
的抽屜式導航(還未觸碰):
public class navigation_drawer extends AppCompactActivity
implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation_drawer);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
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.setNavigationItemSelectedListener(this);
}
@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.navigation_drawer, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
嗨了!感謝您的快速回復。我添加了 'getSupportActionBar()。setDisplayHomeAsUpEnabled(true);' 'setSupportActionBar(toolbar);'但我的酒吧裏依然沒有任何東西。然後,我添加了 getSupportActionBar()。setDisplayHomeAsUpEnabled(true); 在我的主要活動中的onCreate方法下,它出現了,但無法點擊。我是否需要將我的導航器從我的主體中擴展出來? –
你還加了'getSupportActionBar()。setDisplayShowHomeEnabled(true);' –
是的,最後,我開始了一個新項目,選擇抽屜模板,並將所有代碼放在新項目的主要活動中。我認爲我的問題是無法連接原始項目中的兩個java文件。我的所有應用程序代碼都放在我的主文件夾上,而另一個java文件上的所有導航代碼都放在了。 –