我正在实现一个简单的文件浏览器,我有导航工作(感谢在线来源)现在我想要一个家庭和后退按钮直接导航到设置的根和到父目录分别。我做了一个操作栏并添加了两个按钮,但我不知道如何让它们正常工作。最后一个功能是设置按钮功能。对不起提前如果我不发布的代码可以正确 以下是代码我有(我扩展ListActivity):家庭和后退按钮的文件浏览器android
private List<String> item = null;
private List<String> path = null;
private String root;
private TextView myPath;
private File f;
@Override
public boolean onCreateOptionsMenu(Menu menu){
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myPath = (TextView)findViewById(R.id.path);
root = Environment.getExternalStorageDirectory().getPath();
getDir(root);
}
private void getDir(String dirPath)
{
myPath.setText("Location: " + dirPath);
item = new ArrayList<String>();
path = new ArrayList<String>();
f = new File(dirPath);
File[] files = f.listFiles();
if(!dirPath.equals(root))
{
//item.add(root);
//path.add(root);
item.add("../");
path.add(f.getParent());
}
for(int i=0; i < files.length; i++)
{
File file = files[i];
if(!file.isHidden() && file.canRead()){
path.add(file.getPath());
if(file.isDirectory()){
item.add(file.getName() + "/");
}else{
item.add(file.getName());
}
}
}
ArrayAdapter<String> fileList =
new ArrayAdapter<String>(this, R.layout.rows, item);
setListAdapter(fileList);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
File file = new File(path.get(position));
if (file.isDirectory())
{
if(file.canRead()){
getDir(path.get(position));
}else{
new AlertDialog.Builder(this)
.setIcon(R.drawable.ic_launcher)
.setTitle("[" + file.getName() + "] folder can't be read!")
.setPositiveButton("OK", null).show();
}
}else {
new AlertDialog.Builder(this)
.setIcon(R.drawable.ic_launcher)
.setTitle("[" + file.getName() + "]")
.setPositiveButton("OK", null).show();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case R.id.home:
path.add(root);
return true;
case R.id.back:
path.add(f.getParent());
return true;
default:
return super.onOptionsItemSelected(item);
}
}
**的代码 结束谢谢
编辑我的帖子添加更多详细信息 – user1006281 2013-04-08 05:39:44