Question

我正在尝试传递数组项目，以便它们可以显示为图像视图，但在实现它时遇到困难。任何帮助。

class sampleData.java

public static ArrayList<Data> generateSampleData() {
int sampleData[] = {
       R.drawable.imageone,
       R.drawable.imagetwo,
       R.drawable.imagethree

};
String repeat = " repeat";
final ArrayList<Data> datas = new ArrayList<Data>();
for (int i = 0; i < SAMPLE_DATA_ITEM_COUNT; i++) {
    Data data = new Data();
    data.image = sampleData[0];
    data.title = "Pinterest Card";
    data.description = "Super awesome description";
    Random ran = new Random();
    int x = ran.nextInt(i + SAMPLE_DATA_ITEM_COUNT);
    for (int j = 0; j < x; j++)
        data.description += repeat;
    datas.add(data);
}
return datas;

类Data.java

 public class Data {

    public int image;
    public String title;
    public String description;

    public Data() {}

}

如果我将data.image = sampleData [0]更改为，则会出现错误 data.image = sampleData [i]

06-19 11:51:02.814    1626-1626/com.richapps.true_gamer E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.ArrayIndexOutOfBoundsException: length=2; index=2
            at com.richapps.true_gamer.grid.SampleData.generateSampleData(SampleData.java:21)
            at com.richapps.true_gamer.FindPeopleFragment.onCreateView(FindPeopleFragment.java:29)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:828)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1032)
            at android.app.BackStackRecord.run(BackStackRecord.java:622)
            at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1382)
            at android.app.FragmentManagerImpl$1.run(FragmentManager.java:426)
            at android.os.Handler.handleCallback(Handler.java:605)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4424)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
            at dalvik.system.NativeStart.main(Native Method)

Answer 1

更改

data.image = sampleData[0];

到

data.image = sampleData[i];

Answer 2

括号中有0。这意味着您在每一行上打印相同的图像。将其更改为您的循环信函，即＆＃39; i＆＃39;

data.image = sampleData[i];

Answer 3

让它发挥作用。

最初我设置了SAMPLE_DATA_ITEM_COUNT = 10，但当我将其设置为4时，它工作正常，因为它必须与数组中的项目数相匹配。感谢大家的帮助

Answer 4

由于sampleData[]有3个项目且SAMPLE_DATA_ITEM_COUNT's值为10，而您在data.image = sampleData[i];时尝试访问i is greater than 2获得ArrayIndexOutOfBoundsException，因此更改此

for (int i = 0; i < SAMPLE_DATA_ITEM_COUNT; i++) {
    Data data = new Data();
    data.image = sampleData[0];
    data.title = "Pinterest Card";
    data.description = "Super awesome description";
    Random ran = new Random();
    int x = ran.nextInt(i + SAMPLE_DATA_ITEM_COUNT);
    for (int j = 0; j < x; j++)
        data.description += repeat;
    datas.add(data);
}

到

for (int i = 0; i < sampleData.length(); i++){
    Data data = new Data();
    data.image = sampleData[i];
    data.title = "Pinterest Card";
    data.description = "Super awesome description";
    Random ran = new Random();
    int x = ran.nextInt(i + SAMPLE_DATA_ITEM_COUNT);
    for (int j = 0; j < x; j++)
        data.description += repeat;
    datas.add(data);
}

使用for循环传递所有数组项

4 个答案: