我目前正在制作一个 android 应用程序并试图解决这个问题。每当我编译我的代码并将其加载到模拟器上时，它最初都会加载以下错误：
05-22 00:12:54.753: W/dalvikvm(1631): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
05-22 00:12:54.783: E/AndroidRuntime(1631): FATAL EXCEPTION: main
05-22 00:12:54.783: E/AndroidRuntime(1631): java.lang.RuntimeException: Unable to instantiate application android.app.Application: java.lang.NullPointerException
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.LoadedApk.makeApplication(LoadedApk.java:482)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3938)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.ActivityThread.access$1300(ActivityThread.java:123)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1185)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.os.Handler.dispatchMessage(Handler.java:99)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.os.Looper.loop(Looper.java:137)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-22 00:12:54.783: E/AndroidRuntime(1631): at java.lang.reflect.Method.invokeNative(Native Method)
05-22 00:12:54.783: E/AndroidRuntime(1631): at java.lang.reflect.Method.invoke(Method.java:511)
05-22 00:12:54.783: E/AndroidRuntime(1631): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-22 00:12:54.783: E/AndroidRuntime(1631): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-22 00:12:54.783: E/AndroidRuntime(1631): at dalvik.system.NativeStart.main(Native Method)
05-22 00:12:54.783: E/AndroidRuntime(1631): Caused by: java.lang.NullPointerException
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:362)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.LoadedApk.getClassLoader(LoadedApk.java:305)
05-22 00:12:54.783: E/AndroidRuntime(1631): at android.app.LoadedApk.makeApplication(LoadedApk.java:474)
05-22 00:12:54.783: E/AndroidRuntime(1631): ... 11 more
然后它用强制关闭将我踢出应用程序，但它很快就会自动启动并运行良好。如果我关闭应用程序并杀死它，它不会强制关闭或任何东西。就在它最初在模拟器上启动时。我想知道这是什么原因。以下是第二次加载后弹出的消息：
05-22 00:13:07.113: D/dalvikvm(1664): GC_FOR_ALLOC freed 38K, 3% free 9110K/9347K, paused 61ms
05-22 00:13:07.165: I/dalvikvm-heap(1664): Grow heap (frag case) to 12.525MB for 3732496-byte allocation
05-22 00:13:07.263: D/dalvikvm(1664): GC_CONCURRENT freed 1K, 2% free 12754K/12999K, paused 5ms+5ms
05-22 00:13:07.543: D/dalvikvm(1664): GC_FOR_ALLOC freed <1K, 2% free 12755K/12999K, paused 37ms
05-22 00:13:07.573: I/dalvikvm-heap(1664): Grow heap (frag case) to 14.502MB for 2073616-byte allocation
05-22 00:13:07.753: D/dalvikvm(1664): GC_CONCURRENT freed <1K, 2% free 14780K/15047K, paused 5ms+5ms
05-22 00:13:08.033: D/gralloc_goldfish(1664): Emulator without GPU emulation detected.
我将为您提供你们需要的任何和所有编码，但不幸的是我不知道这个错误会出现在哪里？我的程序中有很多文件，所以如果可能的话，我宁愿不发布所有文件。
抱歉，这个问题没有提供太多信息，我只是不知道该给您什么信息（如果有意义的话？）请回复并告诉我您需要哪些信息，并感谢您的任何和所有帮助
编辑
这是我的splash.java
package com.food;
import com.food.odu.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
//creating a splash effect so the company logo appears for a few seconds before the program
public class Splash extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.splash); //defined the reference id 'splash' in the splash.xml file
Thread timer = new Thread(){ //creates a new timer for our splash effect
public void run(){ //runs the splash program
try{
sleep(5000); //attempts to run the splash picture for 5000 milliseconds (5 seconds)
} catch(InterruptedException e){
e.printStackTrace(); //if that doesn't work, this line is debugging information
}finally{
Intent openStartingPoint = new Intent("com.rhodes.jacob.COM.FOOD.ODUACTIVITY"); //creating an intent which is basically a reference to the Android Manifest
startActivity(openStartingPoint); //file saying that when this intent is called, to go to the address at that name in the Android Manifest file
}
}
};
timer.start();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
finish();
}
}
这是我的 oduActivity.java （我想我的主要）
package com.food;
import com.food.odu.R;
//import com.food.odu.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class oduActivity extends Activity {
/** Called when the activity is first created. */
Button Cafe1201, Legends, Rogers, Faculty;
TextView display;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button Cafe1201 = (Button)findViewById(R.id.cafe1201);
Button Legends = (Button)findViewById(R.id.legends);
Button Rogers = (Button)findViewById(R.id.rogers);
Button Faculty = (Button)findViewById(R.id.fac_n_staff);
// Button Legal = (Button)findViewById(R.id.legal);
// Button Other = (Button)findViewById(R.id.other);
// Button About = (Button)findViewById(R.id.aboutUs);
//Button Mainpage = (Button)findViewById(R.id.main_page);
//Changes page to the cafe1201 page
Cafe1201.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent whichCafe = new Intent(oduActivity.this,cafe1201.class);
startActivity(whichCafe);
}
});
//changes page to the legends page
Legends.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent whichCafe = new Intent(oduActivity.this,legends.class);
startActivity(whichCafe);
}
});
//changes page to the rogers page
Rogers.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent whichCafe = new Intent(oduActivity.this,rogers.class);
startActivity(whichCafe);
}
});
//changes page to the faculty page
Faculty.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent whichCafe = new Intent(oduActivity.this,faculty.class);
startActivity(whichCafe);
}
});
}
//Options menu
@Override
public boolean onCreateOptionsMenu(android.view.Menu menu) {
// TODO Auto-generated method stub
super.onCreateOptionsMenu(menu);
MenuInflater blowUp = getMenuInflater();
blowUp.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch(item.getItemId()){
case R.id.main_page:
Intent whichOption = new Intent(oduActivity.this,oduActivity.class);
startActivity(whichOption);
break;
case R.id.other:
whichOption = new Intent(oduActivity.this,menu.class);
startActivity(whichOption);
break;
case R.id.aboutUs:
whichOption = new Intent(oduActivity.this,aboutUs.class);
startActivity(whichOption);
break;
case R.id.legal:
whichOption = new Intent(oduActivity.this,legal.class);
startActivity(whichOption);
break;
}
return false;
}
// display = (TextView) findViewById(R.id.tvDisplay);
// }
}