过去一周半，我一直坚持这个问题。我使用“Kilobolt”框架制作了一个游戏，我一直在尝试在我的应用程序中的App Purchase中实现，并且我已经尽可能地尝试了但是我一直得到相同的错误，即有一个空指针异常。
06-13 21：40：18.991：E / AndroidRuntime（16384）：java.lang.NullPointerException 06-13 21：40：18.991：E / AndroidRuntime（16384）：在android.content.ContextWrapper.getPackageName（ContextWrapper.java:127）
我有一个活动，我有我的方法levelTwoButtonClicked()，我从java类调用该方法，这是空指针异常来自的地方，因为getPackageName()。< / p>
我在try catch语句中有这个：
skuDetails = mService.getSkuDetails(3, getPackageName(), "inapp", querySkus);。
我做了一些研究，并且我读到上下文可能存在问题并且调用getPackageName()但是还没有能够找出问题，但感谢任何能帮我解决这个问题的人！
公共抽象类AndroidGame扩展Activity实现Game {
public static Context mContext;
IInAppBillingService mService;
ServiceConnection mServiceConn;
static final String ITEM_SKU = "android.test.purchased";
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
boolean isPortrait = getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
int frameBufferWidth = isPortrait ? 480: 800;
int frameBufferHeight = isPortrait ? 800: 480;
Bitmap frameBuffer = Bitmap.createBitmap(frameBufferWidth,
frameBufferHeight, Config.RGB_565);
float scaleX = (float) frameBufferWidth
/ getWindowManager().getDefaultDisplay().getWidth();
float scaleY = (float) frameBufferHeight
/ getWindowManager().getDefaultDisplay().getHeight();
renderView = new AndroidFastRenderView(this, frameBuffer);
graphics = new AndroidGraphics(getAssets(), frameBuffer);
fileIO = new AndroidFileIO(this);
audio = new AndroidAudio(this);
input = new AndroidInput(this, renderView, scaleX, scaleY);
screen = getInitScreen();
LinearLayout layout = new LinearLayout(this);
layout.setOrientation(LinearLayout.VERTICAL);
layout.addView(renderView);
setContentView(layout);
PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "MyGame");
mContext = getBaseContext();
mServiceConn = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {
mService = null;
}
@Override
public void onServiceConnected(ComponentName name,
IBinder service) {
mService = IInAppBillingService.Stub.asInterface(service);
}
};
Intent serviceIntent = new Intent("com.android.vending.billing.InAppBillingService.BIND");
serviceIntent.setPackage("com.android.vending");
bindService(serviceIntent, mServiceConn, Context.BIND_AUTO_CREATE);
}
public void levelTwoButtonClicked(){
Assets.click.play(1.00f);
ArrayList<String> skuList = new ArrayList<String> ();
skuList.add("android.test.purchased");
Bundle querySkus = new Bundle();
querySkus.putStringArrayList("ITEM_ID_LIST", skuList);
Bundle skuDetails;
try {
skuDetails = mService.getSkuDetails(3, getPackageName(), "inapp", querySkus);
int response = skuDetails.getInt("RESPONSE_CODE");
if (response == 0) {
ArrayList<String> responseList = skuDetails.getStringArrayList("DETAILS_LIST");
for (String thisResponse : responseList) {
JSONObject object = new JSONObject(thisResponse);
String sku = object.getString("productId");
String price = object.getString("price");
if (sku.equals("android.test.purchased")) {
Bundle buyIntentBundle = mService.getBuyIntent(3, getPackageName(), sku, "inapp", "bGoa+V7g/yqDXvKRqq+JTFn4uQZbPiQJo4pf9RzJ");
PendingIntent pendingIntent = buyIntentBundle.getParcelable("BUY_INTENT");
startIntentSenderForResult(pendingIntent.getIntentSender(), 1001, new Intent(), Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(0));
}
}
}
} catch (RemoteException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} catch (SendIntentException e) {
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1001) {
int responseCode = data.getIntExtra("RESPONSE_CODE", 0);
String purchaseData = data.getStringExtra("INAPP_PURCHASE_DATA");
String dataSignature = data.getStringExtra("INAPP_DATA_SIGNATURE");
if (resultCode == RESULT_OK) {
try {
JSONObject jo = new JSONObject(purchaseData);
String sku = jo.getString("android.test.purchased");
Toast.makeText(mContext,"You have bought the " + sku + ". Excellent choice,adventurer!", Toast.LENGTH_LONG).show();
}
catch (JSONException e) {
Toast.makeText(mContext,"Failed to parse purchase data.", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
}
}
public static Context getContext(){
return mContext;
}
@Override
public void onResume() {
super.onResume();
wakeLock.acquire();
screen.resume();
renderView.resume();
mAdView.resume();
if(Assets.mainmenuloop.isStopped()){
Assets.mainmenuloop.play();
}
}
@Override
public void onPause() {
super.onPause();
wakeLock.release();
renderView.pause();
screen.pause();
mAdView.pause();
if(Assets.mainmenuloop.isPlaying()){
Assets.mainmenuloop.stop();
}
SharedPreferences HighScoreData = getSharedPreferences("high", 0);
SharedPreferences.Editor editor = HighScoreData.edit();
editor.putInt("score", highScore);
editor.putInt("secondScore", secondHighScore);
editor.putInt("thirdScore", thirdHighScore);
editor.putInt("fourthScore", fourthHighScore);
editor.commit();
if (isFinishing())
screen.dispose();
}
@Override
public Input getInput() {
return input;
}
@Override
public FileIO getFileIO() {
return fileIO;
}
@Override
public Graphics getGraphics() {
return graphics;
}
@Override
public Audio getAudio() {
return audio;
}
@Override
public void onDestroy() {
super.onDestroy();
mAdView.destroy();
/*
if (mService != null) {
unbindService(mServiceConn);
}
*/
}
@Override
public void setScreen(Screen screen) {
if (screen == null)
throw new IllegalArgumentException("Screen must not be null");
this.screen.pause();
this.screen.dispose();
screen.resume();
screen.update(0);
this.screen = screen;
}
public Screen getCurrentScreen() {
return screen;
}
}
//活动课程结束 // BEGIN REGULAR JAVA CLASS
public class InAppPurchase extends Screen {
AndroidGame Buy = new PurchaseLevels();
public InAppPurchase(Game game) {
super(game);
}
@Override
public void update(float deltaTime) {
// TODO Auto-generated method stub
@SuppressWarnings("unused")
Graphics g = game.getGraphics();
List<TouchEvent> touchEvents = game.getInput().getTouchEvents();
int len = touchEvents.size();
for(int i = 0; i < len; i++) {
TouchEvent event = touchEvents.get(i);
if(event.type == TouchEvent.TOUCH_UP) {
if(inBounds(event, 195, 142, 235, 55)) {
// UNLOCK LEVEL TWO
Buy.levelTwoButtonClicked();
}
if(inBounds(event, 195, 310, 235, 55)) {
// UNLOCK LEVEL THREE
}
if(inBounds(event, 195, 490, 235, 55)) {
// UNLOCK LEVEL FOUR
}
if(inBounds(event, 70, 630, 210, 55)) {
// RESTORE BUTTON
Assets.click.play(1.00f);
}
if(inBounds(event, 330, 635, 130, 130)) {
game.setScreen(new MainMenuScreen(game));
Assets.click.play(1.00f);
}
}
}
}
private boolean inBounds(TouchEvent event, int x, int y, int width,
int height) {
if (event.x > x && event.x < x + width - 1 && event.y > y
&& event.y < y + height - 1){
return true;
} else {
return false;
}
}
public void updateUI(){
}
@Override
public void paint(float deltaTime) {
// TODO Auto-generated method stub
}
}
@Override
public void pause() {
// TODO Auto-generated method stub
}
@Override
public void resume() {
// TODO Auto-generated method stub
}
@Override
public void dispose() {
// TODO Auto-generated method stub
}
@Override
public void backButton() {
// TODO Auto-generated method stub
}
} //主要活动子类要让我在应用程序购买类中创建我的抽象主要活动“ANDROIDGAME”的实例，以便调用“LEVELTWOBUTTONCLICKED”
public class PurchaseLevels extends AndroidGame {
@Override
public Screen getInitScreen() {
// TODO Auto-generated method stub
return null;
}
}