Question

package com.example.example;

import org.cocos2d.layers.CCScene;
import org.cocos2d.nodes.CCDirector;
import org.cocos2d.opengl.CCGLSurfaceView;

import android.app.Activity;
import android.content.SharedPreferences;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v4.view.ViewPager.LayoutParams;
import android.util.DisplayMetrics;
import android.view.KeyEvent;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import android.widget.Toast;

import com.Forestadventure.allaboutoddbuds.R;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdSize;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.InterstitialAd;
import com.startapp.android.publish.ads.banner.Banner;
import com.startapp.android.publish.adsCommon.StartAppAd;
import com.startapp.android.publish.adsCommon.StartAppSDK;


public class MainActivity extends Activity {

    private CCGLSurfaceView mGLSurfaceView;
    public static boolean lock_level = false;
    public static MainActivity app;

    //<!-- Admob Ads Using Google Play Services SDK -->
        private static final String AD_UNIT_ID = "ca-app-pub-3940256099942544/6300978111";
        private static final String AD_INTERSTITIAL_UNIT_ID = "ca-app-pub-3940256099942544/1033173712";

    public StartAppAd startAppAd;


    public static String STARTAPP_ID = "20346xxxx";

    /** The Admob ad. */
    private InterstitialAd interstitialAd = null;
    public AdView adView = null;
    AdRequest interstitialAdRequest;

    public void onCreate(Bundle savedInstanceState)
    {
        app = this;
        StartAppSDK.init(this, STARTAPP_ID, true);
        StartAppAd.disableSplash();
        startAppAd = new StartAppAd(this);


        super.onCreate(savedInstanceState);
        lock_level = LibConstante.booleanValue(getResources().getString(R.string.lock_level), "on");
        LibConstante.valueGameover = Integer.parseInt(getResources().getString(R.string.show_interstitial_every_gameover));
        LibConstante.valueGameCompleted = Integer.parseInt(getResources().getString(R.string.show_interstitial_every_gamecompleted));
        LibConstante.heroNumber = Integer.parseInt(getResources().getString(R.string.hero_number));

        // set view
                mGLSurfaceView = new CCGLSurfaceView(this);

                AdRequest adRequest = new AdRequest.Builder()
                        .addTestDevice("D700C61EFAE5E803737A2EF9D9861E27")
                        .build();




        //Ads ----------------
                // Create the adView
                final RelativeLayout layout = new RelativeLayout(this);
                layout.setLayoutParams(new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));



                final RelativeLayout.LayoutParams bannerParameters =
                        new RelativeLayout.LayoutParams(
                                    RelativeLayout.LayoutParams.WRAP_CONTENT,
                                    RelativeLayout.LayoutParams.WRAP_CONTENT);
            bannerParameters.addRule(RelativeLayout.CENTER_HORIZONTAL);
            bannerParameters.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 

            layout.addView(mGLSurfaceView);


            //<!-- Ads Using Google Play Services SDK -->
            adView = new AdView(this);
            adView.setAdSize(AdSize.SMART_BANNER);
            adView.setAdUnitId(AD_UNIT_ID);

            adView.loadAd(adRequest);

            adView.setAdListener(new AdListener(){

            @Override
            public void onAdFailedToLoad(int errorCode) {
                // TODO Auto-generated method stub
                Banner startAppBanner = new Banner(MainActivity.this);

                if (startAppBanner.getParent() != null) {
                    ViewGroup tempVg = (ViewGroup) startAppBanner.getParent();
                    tempVg.removeView(startAppBanner);
                }

                layout.addView(startAppBanner, bannerParameters);
            }

            @Override
            public void onAdLoaded() {
                // TODO Auto-generated method stub

                if (adView.getParent() != null) {
                    ViewGroup tempVg = (ViewGroup) adView.getParent();
                    tempVg.removeView(adView);
                }
                layout.addView(adView, bannerParameters);
            }

           });





            setContentView(layout);

         // Create an Interstitial ad.
            interstitialAd = new InterstitialAd(this);
            interstitialAd.setAdUnitId(AD_INTERSTITIAL_UNIT_ID);
            interstitialAdRequest = new AdRequest.Builder()
                 .addTestDevice("D700C61EFAE5E803737A2EF9D9861E27")
                 .build();
            interstitialAd.setAdListener(new AdListener() {
                  @Override
                  public void onAdLoaded() {
                    //interstitialAd.show();
                  }

                  @Override
                  public void onAdFailedToLoad(int errorCode) {
                      Toast.makeText(getApplicationContext(), "Interstitial Ads loading failed", Toast.LENGTH_SHORT).show();
                  }
            });
             // Load the interstitial ad.
            LoadInterstitialAds();

        //----------------------
        // set director
        CCDirector director = CCDirector.sharedDirector();
        director.attachInView(mGLSurfaceView);
        director.setAnimationInterval(1/60);

        // get display info
        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        G.display_w = displayMetrics.widthPixels;
        G.display_h = displayMetrics.heightPixels;
        G.scale = Math.max(G.display_w/1280.0f, G.display_h/800.0f);
        G.width = G.display_w / G.scale;
        G.height = G.display_h / G.scale;

        // get data
        SharedPreferences sp = CCDirector.sharedDirector().getActivity().getSharedPreferences("GameInfo", 0);
        G.music = sp.getBoolean("music", true);
        G.sound = sp.getBoolean("sound", true);

        // create sound
        G.soundMenu = MediaPlayer.create(this, R.raw.menu);
        G.soundMenu.setLooping(true);
        G.soundGame = MediaPlayer.create(this, R.raw.game);
        G.soundGame.setLooping(true);
        G.soundCollide = MediaPlayer.create(this, R.raw.collide);
        G.soundJump = MediaPlayer.create(this, R.raw.jump);
        G.soundLongJump = MediaPlayer.create(this, R.raw.long_jump);
        G.soundSpeedDown = MediaPlayer.create(this, R.raw.speed_down);
        G.soundSpeedUp = MediaPlayer.create(this, R.raw.speed_up);
        G.soundDirection = MediaPlayer.create(this, R.raw.direction_sign);
        G.soundClick = MediaPlayer.create(this, R.raw.menu_click);
        G.soundCollect = MediaPlayer.create(this, R.raw.collect);
        G.bgSound = G.soundMenu;

        // show menu
        CCScene scene = CCScene.node();
        scene.addChild(new MenuLayer(true));
        director.runWithScene(scene);
    }  

    @Override
    public void onPause()
    {
        super.onPause();
        G.bgSound.pause();
        CCDirector.sharedDirector().onPause();
    }

    @Override
    public void onResume()
    {
        super.onResume();
        if( G.music ) G.bgSound.start();
        CCDirector.sharedDirector().onResume();
    }

    @Override
    public void onDestroy()
    {
        super.onDestroy();
        G.bgSound.pause();
        CCDirector.sharedDirector().end();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        if( keyCode == KeyEvent.KEYCODE_BACK )
        {
            CCDirector.sharedDirector().onKeyDown(event);
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    public void LoadInterstitialAds()
    {


                 interstitialAd.loadAd(interstitialAdRequest);

    }

    public void showInterstitialAds()
    {
        runOnUiThread(new Runnable() {
            public void run() {
                if (interstitialAd.isLoaded()){
                interstitialAd.show();
                LoadInterstitialAds();
                }
                else{
                    startAppAd.showAd();
                    LoadInterstitialAds();
                }
            }
        });
    }

}

我不知道为什么我的输出总是重复第3和第4行，无论我输入什么数字。谢谢

Answer 1

a != 0 or 1实际上被解释为(a != 0) or (1)，其中括在括号中的表达式被评估为布尔值。由于1始终为True，因此无论while的值如何，a循环都将继续运行。

请参阅近似重复的How do I test one variable against multiple values?，详细了解or运算符无法满足您在此情况下可能达到的目的的原因。

您应该在条件中使用字符串，因为raw_input返回一个字符串，并使用a运算符和元组检查not in是否是多种可能之一：

a = raw_input("please type 1 or 0")
while a not in ('1', '0'):
    print("please retype")
    a = raw_input("please type 1 or 0")
print("thanks")

Answer 2

另一个例子：

a = raw_input("please type 1 or 0\n")
while True:
    if a in ("1", "0"):
        break
    print "please retype"
    a = raw_input("please type 1 or 0\n")
print "thanks"

Answer 3

您可以使用辅助变量来确定是否符合条件。

b = True
while b:
    a = input("please type 1 or 0")
    if a == "0" or a == "1":
        b = False
    else:
        print("please retype")

print("thanks")

这也可以防止非整数字符抛出错误。

不能走出while循环

3 个答案: