새로운 기본 활동을 추가 한 이후 앱이 다운 됨

Question

다른 프로젝트에 새로운 주요 활동을 성공적으로 추가했습니다. 그러나 나는 다른 프로젝트에서 동일한 기술을 사용하려고 시도했다. (메인 쓰레드의 작업량 때문에 문제가 발생했다.)

"MainActivity"라는 원래 기본 활동을 불러오는 버튼이있는 "HomePage"라는 간단한 홈페이지를 만들고 싶습니다. "MainActivity는"GetLightData "라는 서블릿에 연결하는 데 사용됩니다.이 프로젝트는 Homepage를 추가하기 전에 에뮬레이터에서 (몇 가지 버그가 있지만) 즉시 작동하지만 즉시 충돌합니다. 코드에 대한 답변을 고맙게 생각합니다. .

홈페이지 :

package com.example.clearlight; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 


public class HomePage extends Activity { 

    private Button ScheduleBtn; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.homepage); 

     ScheduleBtn = (Button) findViewById(R.id.home_btn); 

     ScheduleBtn.setOnClickListener(new View.OnClickListener() { 

      public void onClick(View v) { 
       // TODO Auto-generated method stub 


       Intent myIntent = new Intent(HomePage.this, MainActivity.class); 
       HomePage.this.startActivity(myIntent); 


      } 
     }); 
    } 



} 

MainActivity

package com.example.clearlight; 

import android.os.Bundle; 
import android.app.Activity; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.net.URL; 

import org.apache.http.client.ResponseHandler; 

import org.apache.http.client.methods.HttpGet; 

import org.apache.http.impl.client.BasicResponseHandler; 
import org.apache.http.impl.client.DefaultHttpClient; 

import android.os.StrictMode; 
import android.util.Log; 


public class MainActivity extends Activity { 

    TextView txt; 

     @Override 
     public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); 
     StrictMode.setThreadPolicy(policy); 


     setContentView(R.layout.relative); 
     // Create a crude view - this should really be set via the layout resources but since its an example saves declaring them in the XML. 

     /*LinearLayout rootLayout = new LinearLayout(getApplicationContext()); 
     txt = new TextView(getApplicationContext()); 
     rootLayout.addView(txt); 
     setContentView(rootLayout);*/ 


     URL url = null; 
     DefaultHttpClient httpclient = null; 
     try { 
      String registrationUrl = "http://10.0.2.2/SensorInfo/GetLightData?sensor=light"; 
      url = new URL(registrationUrl); 

      HttpGet getRequest = new HttpGet(registrationUrl); 
      ResponseHandler<String> handler = new BasicResponseHandler(); 
      httpclient = new DefaultHttpClient(); 
      // request data from server 
      String result = httpclient.execute(getRequest, handler); 
      Log.d("MyApp", "Data from server is "+ result); 


      //Creating TextView Variable********************************** 
      TextView text1 = (TextView) findViewById(R.id.text); 

      //Sets the new text to TextView (runtime click event)//******* 
      text1.setText("Light Data= " + result); 

      Toast.makeText(this, "Light Data:" + result, Toast.LENGTH_SHORT).show(); //MESSAGE BOX 
      //txtMessage.setText(String.valueOf(msg1) + " " + String.valueOf(msg2)); 
     } catch (Exception ex) { 
      ex.printStackTrace(); 
     } 

     } 
    } 

매니페스트 :

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.clearlight" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="10" 
     android:targetSdkVersion="16" /> 
    <uses-permission android:name="android.permission.INTERNET"></uses-permission> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name="com.example.clearlight.MainActivity" 
      android:label="@string/app_name" > 

     </activity> 
     <activity 
      android:name="com.clearlight.HomePage" 
      android:label="@string/homepage" 
      android:parentActivityName="com.example.clearlight.MainActivity" > 

      <!-- Move the intent filter to HomePage --> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 

      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.example.clearlight.MainActivity" /> 
     </activity> 
    </application> 

</manifest> 

로그인 :

03-11 18 : 08 : 09.522 : I/Process (878) : 보내는 신호. PID : 878 SIG : 9 03-11 18 : 08 : 14.882 : E/Trace (893) : 오류 열림 추적 파일 : 아니요 파일 또는 디렉터리 (0) 03-11 18 : 08 : 15.192 : D/AndroidRuntime (group = 0x40a13300) 03-11 18 : 08 : 15.272 : E/dalvikvm (893) : threadid = 1 : VM 종료 03-11 18 : 08 : 15.192 : AndroidRuntime (893) : 치명적인 예외 : main 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : java.lang.RuntimeException : 활동을 인스턴스화 할 수 없습니다. ComponentInfo {com.example.clearlight/com.clearlight. HomePage} : java.lang.ClassNotFoundException : com.clearlight.HomePage 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : android.app.ActivityThread.performLaunchA ctivity (ActivityThread.java:1983) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2084) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : android.app.ActivityThread.access $ 600 (ActivityThread.java:130) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1195) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : 에 있습니다. 03-11 18:08 : 15.272 : E/AndroidRuntime (893) : android.os.Looper.loop (Looper.java:137) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : 에서 android. app.ActivityThread.main (ActivityThread.java:4745) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : 에서 java.lang.reflect.Method.invokeNative (기본 메소드) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : java.lang.reflect.Method.invoke (Method.java:511) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : com. android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:786) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : 에서 com.android.internal.os.ZygoteInit.main (ZygoteInit .java : 553) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : 에서 dalvik.system.NativeStart.main (기본 메소드) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893)) : 원인 : java.lang.ClassNotFoundEx ception : com.clearlight.HomePage 03-11 18:08:15.272 : E/AndroidRuntime (893) : dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:61) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : java.lang.ClassLoader. loadClass (ClassLoader.java:501) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : 에서 java.lang.ClassLoader.loadClass (ClassLoader.java:461) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : android.app.Instrumentation.newActivity (Instrumentation.java:1053) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : android.app.ActivityThread.performLaunchActivity (ActivityThread.java:1974) 03-11 18 : 08 : 15.272 : E/AndroidRuntime (893) : ... 11 자세히 03-11 18 : 08 : 19.122 : I/Process (893) : 보내는 신호. PID : 893 SIG : 유 com.clearlight.HomePage로 AndroidManifest에서 HomePage 활동을 등록하는

<activity 
     android:name="com.clearlight.HomePage" 
     android:label="@string/homepage" 
     android:parentActivityName="com.example.clearlight.MainActivity" > 

.... /> 

현재

<activity 
     android:name="com.example.clearlight.HomePage" 
     android:label="@string/homepage" 
     android:parentActivityName="com.example.clearlight.MainActivity" > 
.... /> 

에 9

Answer 1

변화하지만 기본 패키지는 com.example.clearlight