在
Android模拟器上运行项目时,我在getApplicationContext上面对异常,因为java.lang.NullPointerException.请帮我解决这个问题.
07-19 15:08:07.811: D/AndroidRuntime(366): Shutting down VM
07-19 15:08:07.811: W/dalvikvm(366): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-19 15:08:07.841: E/AndroidRuntime(366): FATAL EXCEPTION: main
07-19 15:08:07.841: E/AndroidRuntime(366): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{org.TfsMutualFund/org.TfsMutualFund.loading}: java.lang.NullPointerException
07-19 15:08:07.841: E/AndroidRuntime(366): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
07-19 15:08:07.841: E/AndroidRuntime(366): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-19 15:08:07.841: E/AndroidRuntime(366): Caused by: java.lang.NullPointerException
07-19 15:08:07.841: E/AndroidRuntime(366): at android.content.ContextWrapper.getApplicationContext(ContextWrapper.java:100)
07-19 15:08:07.841: E/AndroidRuntime(366): at org.TfsMutualFund.loading.<init>(loading.java:23)
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.TfsMutualFund">
<uses-sdk android:targetSdkVersion="8" />
<application android:name=".globalAdapter" android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".loading"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar"
android:configChanges="orientation|keyboard|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".TFSManinActivity"
android:configChanges="orientation|keyboard|keyboardHidden"/>
</application>
loading.java
package org.TfsMutualFund;
public class loading extends Activity{
private static ArrayAdapter<String> adapter;
private globalAdapter adpt = ((globalAdapter)getApplicationContext());
private String ServicePath = adpt.getServicePath();
private String ServiceName = adpt.getServiceName();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loading);
if(isOnline())
new AsyncLoad().execute();
else
解决方法
不要在OnCreate()之前初始化它,你不能在那里得到Context,在onCreate()中做.
private globalAdapter adpt;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loading);
adpt = ((globalAdapter)getApplicationContext());
...
}
