내 탐색 창에서 메뉴를 클릭하여 새 액티비티를 열 수 있습니다.

Question

매니페스트 파일에 몇 가지 선언이 있습니다. 나는 그 일을 시도했지만 몇 가지 오류가 계속 발생했습니다. 내 응용 프로그램은 정상적으로 실행되지만 메뉴 항목을 선택하면 내 응용 프로그램이 중지됩니다.

의 AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.example.sachinsharma.nav"> 

<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:roundIcon="@mipmap/ic_launcher_round" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <activity 
     android:name=".MainActivity" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme.NoActionBar"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application> 

또한 나는 다시 내가 한 나의 새로운 활동을 시작하는 의도 방법을 사용해야 할 것이라는 점을 알고있다하지만 같은 문제가 유지합니다.

MainActivity.java

package com.example.sachinsharma.nav 
import android.app.Fragment; 
import android.content.Intent; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.app.FragmentTransaction; 
import android.util.Log; 
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 static android.R.attr.value; 

public class MainActivity extends AppCompatActivity 
     implements NavigationView.OnNavigationItemSelectedListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Toolbar 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 = (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.main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     int id = item.getItemId(); 

     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    private void displaySelectedScreen(int id){ 

     Fragment fragment = null; 
     switch(id) { 
      case R.id.nav_dashboard: 
       fragment = new FragDashboard(); 
       break; 
      case R.id.nav_attendance: 
       fragment = new FragAttendance(); 
       break; 
//   case R.id.nav_homework: 
//    break; 
//   case R.id.nav_exams: 
//    break; 
//   case R.id.nav_fee: 
//    break; 
//   case R.id.nav_notifications: 
//    break; 
//   case R.id.nav_tracking: 
//    break; 
//   case R.id.nav_profile: 
//    break; 
     } 

     if(fragment != null){ 

      FragmentTransaction ft = getFragmentManager().beginTransaction(); 

      ft.replace(R.id.content_main, fragment); 
      ft.commit(); 

      //this transaction does not replace layouts completely, it just overlaps and the rest 
      //of content_main layout can still be seen 
     } 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     drawer.closeDrawer(GravityCompat.START); 
    } 

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

     displaySelectedScreen(id); 

     return true; 
    } 
} 

NewActivity.java

package com.example.sachinsharma.nav; 

import android.os.Bundle; 
import android.os.PersistableBundle; 
import android.support.annotation.Nullable; 

/** 
* Created by sachinsharma on 4/4/17. 
*/ 

public class NewActivity extends MainActivity{ 

    @Override 
    public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) { 
     super.onCreate(savedInstanceState, persistentState); 
    } 
} 

다음 내 서랍의 메뉴 항목입니다.

action_main_drawer.xml

<?xml version="1.0" encoding="utf-8"?> 
<menu xmlns:android="http://schemas.android.com/apk/res/android"> 


    <item 
     android:id="@+id/nav_dashboard" 
     android:icon="@mipmap/ic_dashboard_black_24dp" 
     android:title="Dashboard" /> 
    <item 
     android:id="@+id/nav_attendance" 
     android:icon="@mipmap/ic_watch_later_black_24dp" 
     android:title="Attendance" /> 
    <item 
     android:id="@+id/nav_homework" 
     android:icon="@mipmap/ic_announcement_black_24dp" 
     android:title="Homework" /> 
    <item 
     android:id="@+id/nav_exams" 
     android:icon="@mipmap/ic_assignment_black_24dp" 
     android:title="Exams" /> 
    <item 
     android:id="@+id/nav_fee" 
     android:icon="@drawable/rupee" 
     android:title="Fee" /> 
    <item 
     android:id="@+id/nav_notifications" 
     android:icon="@mipmap/ic_notifications_active_black_24dp" 
     android:title="Notifications" /> 
    <item 
     android:id="@+id/nav_tracking" 
     android:icon="@mipmap/ic_directions_bus_black_24dp" 
     android:title="Tracking" /> 
    <item 
     android:id="@+id/nav_profile" 
     android:icon="@mipmap/ic_account_circle_black_24dp" 
     android:title="Profile" /> 


</menu> 

Answer 1

것은 당신이 조각을 사용해야합니다. 당신이하고있는 것은 네비게이션 서랍이없는 또 다른 액티비티와 the fact is you can have only one navigation drawer per activity but multiple fragments per activity and not multiple activities per activity을 여는 것입니다.

조각을 사용하면 모든 것이 잘 작동하여 앱에서 많은 활동을하는 것이 뒤처 지거나 사용자가 앱을 제거 할 가능성이 높습니다.

기타 문의 사항은 for the code just create new project in android studio and select navigation drawer activity over there and create your project after that read the code you will get the concept of fragments으로 알려 주시기 바랍니다.

행운을 빈다. 에서

Answer 2

1. 선언 NewActivity 당신의
2. AndroidManifest.xml이 NewActivity에 대한 테마 AppTheme.NoActionBar을 적용하는 것을 잊지 마십시오.

업데이트하여 다음과 같이 AndroidMenifest.xml :

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.sachinsharma.nav"> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:roundIcon="@mipmap/ic_launcher_round" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 

     <activity 
      android:name=".MainActivity" 
      android:label="@string/app_name" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 

     <activity 
      android:name=".NewActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
     </activity> 

    </application> 
</manifest> 

희망이 ~