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我正在尝试制作一个从 .txt 文件读取到哈希图的应用程序,然后在单击按钮时打印一个随机哈希图条目。但是我收到了像“FATAL EXCEPTION:main”这样的错误,我可以找出问题所在。

public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    register r = new register();
    final HashMap<String, quote> quotes = r.getMap();


    final Random rand = new Random();

    final Button newQuote = (Button) findViewById(R.id.button1);
    final Button clear = (Button) findViewById(R.id.button2);
    final TextView text = (TextView) findViewById(R.id.Text1);
    newQuote.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            int i = rand.nextInt(4);
            String kode = ""+i;
            // TODO Auto-generated method stub
            text.setText(quotes.get(kode).sitat);

        }
    });

    clear.setOnClickListener(new View.OnClickListener() {


        @Override
        public void onClick(View v) {
            text.setText("Sitat");
            // TODO Auto-generated method stub

        }
    });


}  

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
}

class quote{
String kode;
String sitat;
String forfatter;

quote(String kode, String sitat, String forfatter){
    this.kode = kode;
    this.sitat = sitat;
    this.forfatter = forfatter;

}

public String hentSitat(){
    return sitat;

}
public String hentForfatter(){
    return forfatter;
}

}

class register{
HashMap<String, quote> quotes = new HashMap<String, quote>();

register(){
    Scanner sc = new Scanner("sitater");

    while(sc.hasNext()){
        String linje = sc.nextLine();
        String[] split = linje.split("\t");
        String kode = split[0];
        String sitat = split[1];
        String forfatter = split[2];
        quote q = new quote(kode, sitat, forfatter);
        quotes.put(kode, q);
    }

}
HashMap<String, quote> getMap(){
    return quotes;
}
}

日志猫:

05-15 16:25:12.906: D/AndroidRuntime(4135): 关闭 VM 05-15 16:25:12.906: W/dalvikvm(4135): threadid=1: 线程退出未捕获异常 (group=0x40a71930) 05 -15 16:25:12.927: E/AndroidRuntime(4135): 致命异常: main 05-15 16:25:12.927: E/AndroidRuntime(4135): java.lang.RuntimeException: 无法启动活动 ComponentInfo{com.MorHam .qoutes/com.MorHam.qoutes.MainActivity}:java.lang.ArrayIndexOutOfBoundsException:长度=1;index=1 05-15 16:25:12.927: E/AndroidRuntime(4135): 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 05-15 16:25:12.927: E/AndroidRuntime(4135):在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 05-15 16:25:12.927: E/AndroidRuntime(4135): 在 android.app.ActivityThread.access$600(ActivityThread.java:141) 05-15 16:25:12.927: 25:12.927:E/AndroidRuntime(4135):在 dalvik.system.NativeStart.main(本机方法)05-15 16:25:12.927:E/AndroidRuntime(4135):引起:java.lang.ArrayIndexOutOfBoundsException:长度= 1个;index=1 05-15 16:25:12.927: E/AndroidRuntime(4135): at com.MorHam.qoutes.register.(MainActivity.java:120) 05-15 16:25:12.927: E/AndroidRuntime(4135) : 在 com.MorHam.qoutes.MainActivity.onCreate(MainActivity.java:19) 05-15 16:25:12.927: E/AndroidRuntime(4135): 在 android.app.Activity.performCreate(Activity.java:5104) 05 -15 16:25:12.927: E/AndroidRuntime(4135): 在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 05-15 16:25:12.927: E/AndroidRuntime(4135): 在 android.app .ActivityThread.performLaunchActivity(ActivityThread.java:2144) 05-15 16:25:12.927: E/AndroidRuntime(4135): ... 11 更多 05-15 16:25:12.998:

4

1 回答 1

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您可以在添加的 LogCat 中看到:

引起:java.lang.ArrayIndexOutOfBoundsException: length=1; index=1 05-15 16:25:12.927: E/AndroidRuntime(4135): at com.MorHam.qoutes.register.(MainActivity.java:120)

这意味着您的数组有1 个元素,并且您正在尝试访问第二个元素。

String sitat = split[1];
于 2013-05-15T21:12:05.620 回答