この単純なコードが機能しない理由を誰か教えてもらえますか? 最初のアクティビティでは、次のアクティビティに arraylist を送信するオプションをユーザーに選択してもらいます。それはelseステートメントを実行せず、強制終了します。みんなありがとう！
String[] quotes;
ArrayList<String> Dark = new ArrayList<String>();
ArrayList<String> Light = new ArrayList<String>();
コードはこちら
if (Dark.isEmpty()){
Light = i.getStringArrayListExtra("light");
quotes = Light.toArray(new String[Light.size()]);
} else {
Dark = i.getStringArrayListExtra("dark");
quotes = Dark.toArray(new String[Dark.size()]);
};
これが私がそれを送信する方法です
public void dark (View d){
dark.add("Even 0 is a number, just leave him alone!");
dark.add("Love is noting but a bad spell, cast onto your soul, never to be released into the wild...");
dark.add("The end is near please do not make the same mistakes.");
dark.add( "Jenna i love you, youre my little beandip, dive you!");
dark.add( "cute hate but dont rate im no skate");
dark.add("You will never live if you live a lie");
Intent intent = new Intent(choose.this,Startme.class);
intent.putStringArrayListExtra("dark",dark);
startActivity(intent);
}
public void light (View l) {
light.add("Good ideas will come if you share your love");
light.add("enter a world with no doubt, join god");
light.add("come on, can you live a life");
light.add( "where love is so is hate lol not");
light.add( "watch me now!! go with me and join the lord");
light.add("never be afrade of the darkness");
Intent intent = new Intent(choose.this,Startme.class);
intent.putStringArrayListExtra("light",light);
startActivity(intent);
}
ログ
07-30 17:41:33.457: E/AndroidRuntime(15638): FATAL EXCEPTION: main
07-30 17:41:33.457: E/AndroidRuntime(15638): java.lang.RuntimeException: Unable to start activity ComponentInfo{me.me.quote/me.me.quote.Startme}: java.lang.NullPointerException
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1696)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1716)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.app.ActivityThread.access$1500(ActivityThread.java:124)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:968)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.os.Handler.dispatchMessage(Handler.java:99)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.os.Looper.loop(Looper.java:130)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.app.ActivityThread.main(ActivityThread.java:3806)
07-30 17:41:33.457: E/AndroidRuntime(15638): at java.lang.reflect.Method.invokeNative(Native Method)
07-30 17:41:33.457: E/AndroidRuntime(15638): at java.lang.reflect.Method.invoke(Method.java:507)
07-30 17:41:33.457: E/AndroidRuntime(15638): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-30 17:41:33.457: E/AndroidRuntime(15638): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-30 17:41:33.457: E/AndroidRuntime(15638): at dalvik.system.NativeStart.main(Native Method)
07-30 17:41:33.457: E/AndroidRuntime(15638): Caused by: java.lang.NullPointerException
07-30 17:41:33.457: E/AndroidRuntime(15638): at me.me.quote.Startme.onCreate(Startme.java:164)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-30 17:41:33.457: E/AndroidRuntime(15638): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1660)
07-30 17:41:33.457: E/AndroidRuntime(15638): ... 11 more
完全なコードは次のとおりです。
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.startquotes);
Intent i = getIntent();
if (Dark.isEmpty()){
Light = i.getStringArrayListExtra("light");
quotes = Light.toArray(new String[Light.size()]);
} else {
Dark = i.getStringArrayListExtra("dark");
quotes = Dark.toArray(new String[Dark.size()]);
}
Button clouds = (Button) findViewById(R.id.Change);
TranslateAnimation cloud2 = new TranslateAnimation(0, 0, +200, 0);
clouds.startAnimation(cloud2);
cloud2.setDuration(1000);
Button clouds3 = (Button) findViewById(R.id.nxt);
TranslateAnimation cloud3 = new TranslateAnimation(+200, 0, 0, 0);
clouds3.startAnimation(cloud3);
cloud3.setDuration(1000);
Button clouds4 = (Button) findViewById(R.id.back);
TranslateAnimation cloud4 = new TranslateAnimation(-200, 0, 0, 0);
clouds4.startAnimation(cloud4);
cloud4.setDuration(1000);
AdView adview = (AdView)findViewById(R.id.adView);
AdRequest re = new AdRequest();
re.setTesting(true);
adview.loadAd(re);
String ser = SerializeObject.ReadSettings(Startme.this, "myobject.dat");
if (ser != null && !ser.equalsIgnoreCase("")) {
Object obj = SerializeObject.stringToObject(ser);
// Then cast it to your object and
if (obj instanceof ArrayList) {
// Do something
give = (ArrayList<String>)obj;
}
}
TextView Dark=(TextView)findViewById(R.id.Quote);
Typeface face=Typeface.createFromAsset(getAssets(), "fonts/font1.ttf");
Dark.setTypeface(face);
num = gen.nextInt(5);
TextView text = (TextView) findViewById(R.id.Quote);
text.setText( quotes[num]);
TextView number = (TextView) findViewById(R.id.Qn);
number.setText("#"+num);
TextView Q=(TextView)findViewById(R.id.Qn);
Typeface tf=Typeface.createFromAsset(getAssets(), "fonts/titlefont.ttf");
Q.setTypeface(tf);
}
}
164行目
if (Dark.isEmpty()){
Light = i.getStringArrayListExtra("light");
----------> quotes = Light.toArray(new String[Light.size()]);
} else {