Question

我在Android市场上有一个应用程序用户报告偶尔出现的错误ArrayIndexOutofBounds（强制关闭）。我自己从来没有经历过这个错误，所以很难找出问题所在。我希望有一个更有天赋的程序员可以看一看。有些人查看此文件对话框时会发生这种情况。

public void fileDialog() {
    // TODO Auto-generated method stub
    d = new Dialog(this);
    d.setTitle("Choose the song file");
    if (canWriteToFlash()) {

    ScrollView sview = new ScrollView(this);
    LinearLayout holder = new LinearLayout(this);
    holder.setOrientation(1);

    String path = Environment.getExternalStorageDirectory().getPath()
        + File.separator + "Music" + File.separator;

    File folder = new File(path);
    File[] listOfFiles = folder.listFiles();
    int count = 0;
    // count files in directory
    for (int i = 0; i < listOfFiles.length; i++) {

        if (listOfFiles[i].isFile()) {
            count++;

        }
    }
    if (count == 0) {
    TextView empty1 = new TextView(this);
         empty1.setText("The folder sdcard/Music, is empty. You must add song files in order to attach music to lyrics.");
         empty1.setTextSize(18);
         empty1.setPadding(8, 0, 8, 8);
         holder.addView(empty1);
    }

    // turn files into string array
    String[] sfiles = new String[count];
    for (int i = 0; i < listOfFiles.length; i++) {
        if (listOfFiles[i].isFile()) {
            sfiles[i] = listOfFiles[i].getName();
        }
    }
    // Sort Array case insenstive
    Arrays.sort(sfiles, String.CASE_INSENSITIVE_ORDER);
    // create text
    TextView[] t1 = new TextView[(count)];
    for (int i = 0; i < listOfFiles.length; i++) {
        if (listOfFiles[i].isFile()) {
            t1[i] = new TextView(this);
            t1[i].setText(sfiles[i]);
            t1[i].setPadding(7, 8, 7, 8);
            t1[i].setTextSize(18);
            holder.addView(t1[i]);
        }
    }
    // Create Click
    for (int i = 0; i < listOfFiles.length; i++) {
        if (listOfFiles[i].isFile()) {
        final TextView thetext = t1[i];
        thetext.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            // TODO Auto-generated method stub
                songname = (String) thetext.getText();
                songfile.setText(songname);
                d.cancel();
            }
        });
    }
    }

    sview.addView(holder);
    d.setContentView(sview);
        } else {
       TextView usbt = new TextView(this);
       usbt.setText("Cannot communicate with sdcard! Make sure that USB connected is not enabled. Or try unplugging your USB cord.");
       usbt.setPadding(7, 8, 7, 8);
           usbt.setTextSize(18);
       d.setContentView(usbt);
    }

    d.show();
}

Answer 1

我不喜欢这个：

if (listOfFiles[i].isFile()) {
            t1[i] = new TextView(this);
            t1[i].setText(sfiles[i]);
            t1[i].setPadding(7, 8, 7, 8);
            t1[i].setTextSize(18);
            holder.addView(t1[i]);
        }

您假设sFiles [i]与listOfFiles [i]具有相同的位置，但您之前订购过，所以它可能不是同一个文件？

无论如何，除此之外，你一遍又一遍地问同样的问题。（if（listOfFiles [i] .isFile（））{）如果你有完整的堆栈跟踪，请发布它。

Answer 2

您已将“TextView”声明为最终版。在最终字段中存储对象的引用将使您的引用不可变。它没有造成任何问题吗？

Android arrayindexoutofbounds错误

2 个答案: