我一直在google和其他使用LibGdx实现GameHelper的网站上的教程，我不知道为什么会出现这个错误
这是我的主要活动
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.RelativeLayout;
import com.CrazyEagle.utils.AdsHandler;
import com.CrazyEagle.utils.GameAction;
import com.badlogic.gdx.backends.android.AndroidApplication;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdSize;
import com.google.android.gms.ads.AdView;
import com.google.example.games.basegameutils.GameHelper;
public class MainActivity extends AndroidApplication implements AdsHandler, GameAction, GameHelper.GameHelperListener{
static AdView adView;
static RelativeLayout.LayoutParams adParams;
GameHelper mHelper;
private static final String AD_UNIT_ID = "cid";
private final static int SHOW_ADS = 1;
private final static int HIDE_ADS = 0;
private final static int TOP = 1;
private final static int BOTTOM = 0;
final static int RC_UNUSED = 9002;
public MainActivity(){
mHelper = new GameHelper(this, GameHelper.CLIENT_ALL);
}
@Override
protected void onActivityResult(int requestCode, int response, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, response, data);
mHelper.onActivityResult(requestCode, response, data);
}
protected static Handler handler = new Handler()
{
@Override
public void handleMessage(Message msg) {
switch(msg.what) {
case SHOW_ADS:
{
adView.setVisibility(View.VISIBLE);
break;
}
case HIDE_ADS:
{
adView.setVisibility(View.GONE);
break;
}
}
switch(msg.what){
case TOP:
adParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
adParams.addRule(RelativeLayout.ALIGN_TOP);
break;
case BOTTOM:
adParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
adParams.addRule(RelativeLayout.ALIGN_BOTTOM);
break;
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mHelper.setup(this);
RelativeLayout layout = new RelativeLayout(this);
// Do the stuff that initialize() would do for you
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
View gameView = initializeForView(new GameActivity(this));
AdRequest adRequest = new AdRequest.Builder()
.addTestDevice("")
.build();
adView = new AdView(this);
adView.setAdSize(AdSize.FULL_BANNER);
adView.setAdUnitId(AD_UNIT_ID);
adView.loadAd(adRequest);
RelativeLayout.LayoutParams gameParams =
new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
gameParams.addRule(RelativeLayout.CENTER_IN_PARENT);
gameParams.bottomMargin = 1;
adParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
layout.addView(gameView, gameParams);
layout.addView(adView, adParams);
setContentView(layout);
}
@Override
protected void onDestroy() {
if (adView != null) {
adView.destroy();
}
super.onDestroy();
}
@Override
protected void onPause() {
if (adView != null) {
adView.pause();
}
super.onPause();
}
@Override
protected void onResume() {
if (adView != null) {
adView.resume();
}
super.onResume();
}
@Override
public void showAds(boolean show) {
handler.sendEmptyMessage(show ? SHOW_ADS : HIDE_ADS);
}
@Override
public void setLocation(boolean loc) {
handler.sendEmptyMessage(loc ? TOP : BOTTOM);
}
@Override
public void Login() {
try {
runOnUiThread(new Runnable(){
//@Override
public void run(){
mHelper.beginUserInitiatedSignIn();
}
});
}catch (final Exception ex){
}
}
@Override
public void LogOut() {
try {
runOnUiThread(new Runnable(){
//@Override
public void run(){
mHelper.signOut();
}
});
}catch (final Exception ex){
}
}
@Override
public boolean getSignedIn() {
return mHelper.isSignedIn();
}
@Override
public void onSignInFailed() {
System.out.println("sign in failed");
}
@Override
public void onSignInSucceeded() {
System.out.println("sign in succeeded");
}
}
这是我的日志
03-09 15:17:15.813: E/AndroidRuntime(25395): FATAL EXCEPTION: main
03-09 15:17:15.813: E/AndroidRuntime(25395): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.CrazyEagle/com.CrazyEagle.MainActivity}: java.lang.NullPointerException
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2219)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.app.ActivityThread.access$700(ActivityThread.java:159)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.os.Handler.dispatchMessage(Handler.java:99)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.os.Looper.loop(Looper.java:137)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.app.ActivityThread.main(ActivityThread.java:5419)
03-09 15:17:15.813: E/AndroidRuntime(25395): at java.lang.reflect.Method.invokeNative(Native Method)
03-09 15:17:15.813: E/AndroidRuntime(25395): at java.lang.reflect.Method.invoke(Method.java:525)
03-09 15:17:15.813: E/AndroidRuntime(25395): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
03-09 15:17:15.813: E/AndroidRuntime(25395): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
03-09 15:17:15.813: E/AndroidRuntime(25395): at dalvik.system.NativeStart.main(Native Method)
03-09 15:17:15.813: E/AndroidRuntime(25395): Caused by: java.lang.NullPointerException
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.content.ContextWrapper.getApplicationContext(ContextWrapper.java:109)
03-09 15:17:15.813: E/AndroidRuntime(25395): at com.google.example.games.basegameutils.GameHelper.<init>(GameHelper.java:172)
03-09 15:17:15.813: E/AndroidRuntime(25395): at com.CrazyEagle.MainActivity.<init>(MainActivity.java:44)
03-09 15:17:15.813: E/AndroidRuntime(25395): at java.lang.Class.newInstanceImpl(Native Method)
03-09 15:17:15.813: E/AndroidRuntime(25395): at java.lang.Class.newInstance(Class.java:1130)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.app.Instrumentation.newActivity(Instrumentation.java:1078)
03-09 15:17:15.813: E/AndroidRuntime(25395): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2210)
03-09 15:17:15.813: E/AndroidRuntime(25395): ... 11 more
任何帮助都将被appricaited
答案 0 :(得分：0)
放置mHelper = new GameHelper（this，GameHelper.CLIENT_ALL）;在错误的地方。它应该在onCreate（）
中启动答案 1 :(得分：0)
尝试put requestWindowFeature（Window.FEATURE_NO_TITLE）;在super.onCreate之前（savedInstanceState）;