탐색 창을 사용하여 새 활동을 여는 방법은 무엇입니까?

Question

왼쪽에서 오른쪽으로 슬라이딩하여 탐색 서랍 메뉴를 만들고 싶습니다. Google 개발자 자습서로 해봤지만 자습서에서는 탐색 서랍을 만드는 방법과 메뉴에서 항목을 설정하여 새 조각을 여는 방법을 보여 줬습니다. 레이아웃,하지만 내가 원한 아니에요 .. 내가 원하는 것은 탐색 서랍 메뉴에서 항목으로 새로운 활동을 열고, 또한 그것을했지만 Sliding.java 활동이 열리면 내 애플이 충돌 .. 슬라이딩 .java는 메뉴에 대한 코드가 포함 된 활동입니다.

Sliding.java :

package com.orar.cngcnasaud; 

import android.app.Activity; 
import android.content.Intent; 
import android.content.res.Configuration; 
import android.os.Bundle; 
import android.support.v4.app.ActionBarDrawerToggle; 
import android.support.v4.view.GravityCompat; 
import android.support.v4.widget.DrawerLayout; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 


public class Sliding extends Activity { 
    private DrawerLayout mDrawerLayout; 
    private ListView mDrawerList; 
    private ActionBarDrawerToggle mDrawerToggle; 

    private CharSequence mDrawerTitle; 
    private CharSequence mTitle; 
    private String[] mPlanetTitles; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     mTitle = mDrawerTitle = getTitle(); 
     mPlanetTitles = getResources().getStringArray(R.array.planets_array); 
     mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
     mDrawerList = (ListView) findViewById(R.id.left_drawer); 

     // set a custom shadow that overlays the main content when the drawer opens 
     mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 
     // set up the drawer's list view with items and click listener 
     mDrawerList.setAdapter(new ArrayAdapter<String>(this, 
       R.layout.drawer_list_item, mPlanetTitles)); 
     mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); 

     // enable ActionBar app icon to behave as action to toggle nav drawer 
     getActionBar().setDisplayHomeAsUpEnabled(true); 
     getActionBar().setHomeButtonEnabled(true); 

     // ActionBarDrawerToggle ties together the the proper interactions 
     // between the sliding drawer and the action bar app icon 
     mDrawerToggle = new ActionBarDrawerToggle(
       this,     /* host Activity */ 
       mDrawerLayout,   /* DrawerLayout object */ 
       R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ 
       R.string.drawer_open, /* "open drawer" description for accessibility */ 
       R.string.drawer_close /* "close drawer" description for accessibility */ 
       ) { 
      public void onDrawerClosed(View view) { 
       getActionBar().setTitle(mTitle); 
       invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
      } 

      public void onDrawerOpened(View drawerView) { 
       getActionBar().setTitle(mDrawerTitle); 
       invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
      } 
     }; 
     mDrawerLayout.setDrawerListener(mDrawerToggle); 

     if (savedInstanceState == null) { 
      selectItem(0); 
     } 
    } 

    private void selectItem(int i) { 
     // TODO Auto-generated method stub 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     MenuInflater inflater = getMenuInflater(); 
     inflater.inflate(R.menu.main, menu); 
     return super.onCreateOptionsMenu(menu); 
    } 

    /* Called whenever we call invalidateOptionsMenu() */ 


    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 

     if (mDrawerToggle.onOptionsItemSelected(item)) { 
      return true; 
     } 
     return false; 


     } 



     private class DrawerItemClickListener implements ListView.OnItemClickListener { 

     @Override 
     public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, 
       long arg3) { 
      // TODO Auto-generated method stub 

     } 

    } 




    @Override 
    public void setTitle(CharSequence title) { 
     mTitle = title; 
     getActionBar().setTitle(mTitle); 
    } 



    @Override 
    protected void onPostCreate(Bundle savedInstanceState) { 
     super.onPostCreate(savedInstanceState); 

     mDrawerToggle.syncState(); 
    } 

    @Override 
    public void onConfigurationChanged(Configuration newConfig) { 
     super.onConfigurationChanged(newConfig); 

     mDrawerToggle.onConfigurationChanged(newConfig); 
    } 

     @SuppressWarnings("unused") 
     private void selectItem1(final int position) { 
      switch(position) { 
      case 1: 
        Intent a = new Intent(this, MainActivity.class); 
        startActivity(a); 
      break; 
      case 2: 
        Intent b = new Intent(this, Profesori.class); 
        startActivity(b); 
        break; 
      default: 
      } 
     } 
} 

내가 그것을 실행할 때이 오류가없는,하지만 여전히 충돌 것 ..

편집 :

로그 캣 :

02-17 16:29:58.496: I/dalvikvm(322): Could not find method com.orar.cngcnasaud.Sliding.getActionBar, referenced from method com.orar.cngcnasaud.Sliding.onCreate 
02-17 16:29:58.496: W/dalvikvm(322): VFY: unable to resolve virtual method 5311: Lcom/orar/cngcnasaud/Sliding;.getActionBar()Landroid/app/ActionBar; 
02-17 16:29:58.496: D/dalvikvm(322): VFY: replacing opcode 0x6e at 0x0058 
02-17 16:29:58.496: D/dalvikvm(322): VFY: dead code 0x005b-0087 in Lcom/orar/cngcnasaud/Sliding;.onCreate (Landroid/os/Bundle;)V 
02-17 16:29:58.504: I/dalvikvm(322): Could not find method com.orar.cngcnasaud.Sliding.getActionBar, referenced from method com.orar.cngcnasaud.Sliding.setTitle 
02-17 16:29:58.504: W/dalvikvm(322): VFY: unable to resolve virtual method 5311: Lcom/orar/cngcnasaud/Sliding;.getActionBar()Landroid/app/ActionBar; 
02-17 16:29:58.504: D/dalvikvm(322): VFY: replacing opcode 0x6e at 0x0002 
02-17 16:29:58.504: D/dalvikvm(322): VFY: dead code 0x0005-000b in Lcom/orar/cngcnasaud/Sliding;.setTitle (Ljava/lang/CharSequence;)V 
02-17 16:29:58.534: D/AndroidRuntime(322): Shutting down VM 
02-17 16:29:58.534: W/dalvikvm(322): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
02-17 16:29:58.554: E/AndroidRuntime(322): FATAL EXCEPTION: main 
02-17 16:29:58.554: E/AndroidRuntime(322): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.orar.cngcnasaud/com.orar.cngcnasaud.Sliding}: java.lang.NullPointerException 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.os.Handler.dispatchMessage(Handler.java:99) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.os.Looper.loop(Looper.java:123) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.app.ActivityThread.main(ActivityThread.java:4627) 
02-17 16:29:58.554: E/AndroidRuntime(322): at java.lang.reflect.Method.invokeNative(Native Method) 
02-17 16:29:58.554: E/AndroidRuntime(322): at java.lang.reflect.Method.invoke(Method.java:521) 
02-17 16:29:58.554: E/AndroidRuntime(322): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
02-17 16:29:58.554: E/AndroidRuntime(322): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
02-17 16:29:58.554: E/AndroidRuntime(322): at dalvik.system.NativeStart.main(Native Method) 
02-17 16:29:58.554: E/AndroidRuntime(322): Caused by: java.lang.NullPointerException 
02-17 16:29:58.554: E/AndroidRuntime(322): at com.orar.cngcnasaud.Sliding.onCreate(Sliding.java:39) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
02-17 16:29:58.554: E/AndroidRuntime(322): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
02-17 16:29:58.554: E/AndroidRuntime(322): ... 11 more 
02-17 16:30:06.275: I/Process(322): Sending signal. PID: 322 SIG: 9 

슬라이딩 .xml :

Answer 1

당신은 여기에 NullPointer 있습니다

Caused by: java.lang.NullPointerException at com.orar.cngcnasaud.Sliding.onCreate(Sliding.java:39) 

이 (어쨌든 라인에 대한 확인되지 않음) DrawerLayout 것 같다 :

mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 

당신은 당신의 레이아웃을 게시/확인 할 수 있습니까?

Answer 2

동일한 문제가있었습니다. 그래서 나는 다음 단계를 사용하여 그것을 해결했다. 다른 사람들에게도 유용 할 것입니다.

activity_main.xml에있는 drawer_layout을 검색하는 컴파일러가 문제입니다.

setContentView(R.layout.activity_main); 
//You added the view file as activity_main 

mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
//While execution the compiler will search "drawer_layout" in the view file (activity_main.xml). But the drawer_layout is in sliding.xml. 

는 그러나 더 "drawer_layout"이 activity_main.xml에 추가되지 않습니다있다. 추가 된 내용은 "sliding.xml"

입니다. 따라서이 문제를 해결하려면 activity_main.xml에 다음을 추가해야합니다.

<android.support.v4.widget.DrawerLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/drawer_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@drawable/bff"> 

    <FrameLayout 
     android:id="@+id/content_frame" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 


    <ListView 
     android:id="@+id/left_drawer" 
     android:layout_width="240dp" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:choiceMode="singleChoice" 
     android:divider="@android:color/transparent" 
     android:dividerHeight="0dp" 
     android:background="#111"/> 

<!-- The content in the activity_main.xml --> 

</android.support.v4.widget.DrawerLayout>