好吧，所以我正在尝试创建一个文件选择对话框，我得到了它，所以我可以选择该文件，但我想要它，所以当我选择一个目录时，它会移动并列出新目录中的所有文件。 现在，当我点击某个目录时，它只会进入黑屏。当我点击目录时，如何让它列出目录的文件？ 这是我到目前为止的代码：
private void loadFileList(){
try{
dir.mkdirs();
}
catch(SecurityException e){
Log.e("Error: ", "unable to write on the sd card " + e.toString());
}
if(dir.exists()){
mFileList = dir.list();
}
else{
mFileList= new String[0];
}
}
protected Dialog onCreateDialog(int id){
Dialog dialog = null;
AlertDialog.Builder builder = new Builder(this);
switch(id){
case DIALOG_LOAD_ROM:
builder.setTitle("Choose your rom");
if(mFileList == null){
dialog = builder.create();
return dialog;
}
builder.setItems(dir.list(), new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
mChosenFile = dir.list()[which];
rom = new File(dir, mChosenFile);
if(rom.isDirectory()){
Log.e("log:",dir.getAbsolutePath());
dir = new File(dir, mChosenFile);
Log.e("log:",dir.getAbsolutePath());
loadFileList();
showDialog(DIALOG_LOAD_ROM);
}
else{
loadFileList();
showDialog(DIALOG_LOAD_PATCH);
}
}
});
break;
case DIALOG_LOAD_PATCH:
builder.setTitle("Choose your patch");
if(mFileList == null){
dialog = builder.create();
return dialog;
}
builder.setItems(dir.list(), new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
mChosenFile = dir.list()[which];
File sdcard = Environment.getExternalStorageDirectory();
patch = new File(sdcard, mChosenFile);
AlertDialog.Builder alert = new AlertDialog.Builder(masterApp);
alert.setTitle("New Rom Name");
alert.setMessage("Please input a name");
// Set an EditText view to get user input
final EditText input = new EditText(masterApp);
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String value = input.getText().toString();
File sdcard = Environment.getExternalStorageDirectory();
File newRom = new File(sdcard,value);
patchROM(rom, patch, newRom);
AlertDialog.Builder alert2 = new AlertDialog.Builder(masterApp);
alert2.setTitle("Finished");
alert2.setMessage("Rom has been patched");
alert2.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
System.exit(0);
}
});
alert2.show();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
File sdcard = Environment.getExternalStorageDirectory();
File newRom = new File(sdcard,"newrom.gb");
patchROM(rom, patch, newRom);
AlertDialog.Builder alert2 = new AlertDialog.Builder(masterApp);
alert2.setTitle("Finished");
alert2.setMessage("Rom has been patched");
alert2.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
System.exit(0);
}
});
alert2.show();
}
});
alert.show();
}
});
break;
}
dialog = builder.show();
return dialog;
}