检查文件，始终返回true

Question

我尝试了下面的代码，如果我重命名音乐文件Musik_stk100.mp3，if仍然会返回true？

我做错了什么？

String filepath = "file:///mnt/sdcard/data/musikapp/";
final File musicfile = new File(filepath  + "/" + "Musik_stk100.mp3");
final ImageView imagetrue = (ImageView) findViewById(R.id.imagetrue);
final ImageView imagefalse = (ImageView) findViewById(R.id.imagefalse);

    if (musicfile.exists()){
        imagetrue .setVisibility(View.VISIBLE);
        imagefalse .setVisibility(View.GONE);
    } else {
        imagefalse .setVisibility(View.VISIBLE);
        imagetrue .setVisibility(View.GONE);
    }

解

String filepath = (Environment.getExternalStorageDirectory() + "/data/musikapp/");
final File musicfile = new File(filepath  + "Musik_stk100.mp3");
final ImageView imagetrue = (ImageView) findViewById(R.id.imagetrue);
final ImageView imagefalse = (ImageView) findViewById(R.id.imagefalse);

    if (musicfile.exists()){
        imagetrue .setVisibility(View.VISIBLE);
        imagefalse .setVisibility(View.GONE);
    } else {
        imagefalse .setVisibility(View.VISIBLE);
        imagetrue .setVisibility(View.GONE);
    }