[Android]ListView中PopupWindow的使用

懒得打字了，直接把这个类的代码贴上来

public class MainActivity extends Activity {

    private TextView tv_shuju;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    static String projectfilepath = "//sdcard//麻城市宅基地资料//";
    private String[] listParents;
    private PopupWindow popupWindow;
    private ArrayList<String> folder;
    private String path;

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 判断sd卡是否存在
        boolean sdCardExist = Environment.getExternalStorageState().equals(
                android.os.Environment.MEDIA_MOUNTED);
        // 获得sd卡根目录
        if (sdCardExist) {
            File dir = Environment.getExternalStorageDirectory();
            path = dir.getAbsolutePath() + "/麻城市宅基地资料/";
            // 文件夹List集合
            folder = getFolder(path);
            // 适配器数据
            listParents = listParent(folder);
        } else {
            Toast.makeText(getApplicationContext(), "没有SD卡", 0).show();
        }

        // 获取控件ID
        tv_shuju = (TextView) findViewById(R.id.tv_shuju);
        tv_shuju.setText("点击下面修改数据");
        listView = (ListView) findViewById(R.id.listView1);
        if (listParents.length == 0) {
            tv_shuju.setText("没有数据");
        }
        // listview适配器
        if (adapter == null) {
            adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listParents);
            listView.setAdapter(adapter);
        } else {
            adapter.notifyDataSetChanged();
        }

        // listview 点击监听
        listView.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {

                System.out.println(position);
                if (popupWindow != null) {
                    popupWindow.dismiss();
                    popupWindow = null;
                }
                int[] location = new int[2];
                view.getLocationInWindow(location); // 获取到了x 和y的坐标 存放到了 2个元素的数组中
                int x = location[0];
                int y = location[1];
                // 弹出popupWindow
                View popup_view = View.inflate(getApplicationContext(), R.layout.popup_soft_manager, null);
                Button btn_del = (Button) popup_view.findViewById(R.id.btn_del);
                // 删除按钮
                btn_del.setOnClickListener(new OnClickListener() {

                    public void onClick(View v) {
                        // 获取到点击的文件夹名称
                        String name = listParents[position];
                        // 删除文件夹
                        delFolder(name);
                        popupWindow.dismiss();
                        popupWindow = null;
                        shuaxin();
                    }

                });
                // 更新/重命名按钮
                Button btn_update = (Button) popup_view.findViewById(R.id.btn_update);
                btn_update.setOnClickListener(new OnClickListener() {

                    public void onClick(View v) {
                        Intent intent = new Intent(getApplicationContext(), UpdateActivty.class);
                        intent.putExtra("floerName", folder.get(position));
                        intent.putExtra("path", path);
                        startActivityForResult(intent, 1);
                        popupWindow.dismiss();
                        popupWindow = null;

                    }
                });

                // 取消按钮
                Button btn_canel = (Button) popup_view.findViewById(R.id.btn_canel);
                btn_canel.setOnClickListener(new OnClickListener() {

                    public void onClick(View v) {
                        popupWindow.dismiss();
                        popupWindow = null;

                    }
                });
                popupWindow = new PopupWindow(popup_view, -2, -2);
                // 给popupWindow设置背景
                popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
                // 展示popupWindow 参数 1 挂载的父窗体
                popupWindow.showAtLocation(parent, Gravity.LEFT | Gravity.TOP, x + 50, y + 60);
            }

        });

        // listview 滑动监听
        listView.setOnScrollListener(new OnScrollListener() {

            public void onScrollStateChanged(AbsListView view, int scrollState) {
                // TODO Auto-generated method stub

            }

            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
                    int totalItemCount) {
                if (popupWindow != null) {
                    popupWindow.dismiss();
                    popupWindow = null;
                }

            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode==2){
            shuaxin();
        }
    }

    // 刷新适配器
    private void shuaxin() {
        folder.clear();
        listParents = null;
        folder = getFolder(path);
        // 适配器数据
        listParents = listParent(folder);
        adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1,
                listParents);
        listView.setAdapter(adapter);

    }

    //重命名文件
    public  void renameFloder(String name,String reName){
        File file = new File(path + name);
        file.renameTo(new File(reName));
    }

    // List转换为String[]
    public String[] listParent(ArrayList<String> list) {
        int size = list.size();
        String[] array = new String[size];
        for (int i = 0; i < list.size(); i++) {
            array[i] = (String) list.get(i);
        }
        return array;
    }

    // 删除文件夹
    public void delFolder(String name) {
        File file = new File(path + name);
        if (file.isFile()) {
            file.delete();
            return;
        }
        if (file.isDirectory()) {
            File[] chaFiles = file.listFiles();
            if (chaFiles == null || chaFiles.length == 0) {
                file.delete();
                return;
            }
            for (int i = 0; i < chaFiles.length; i++) {
                chaFiles[i].delete();
            }
            file.delete();
        }

    }

    // 检查文件夹是否存在
    boolean isFolderExists(String strFolder) {
        File file = new File(strFolder);
        return file.exists();
    }

    // 扫描文件夹目录下的文件夹名字
    public ArrayList<String> getFolder(String path) {
        ArrayList<String> names = new ArrayList<String>();
        File file = new File(path);
        if (file.isDirectory()) {
            File[] array = file.listFiles();
            for (int i = 0; i < array.length; i++) {
                File f = array[i];
                names.add(f.getName());
                System.out.println("文件夹名称" + f.getName());
            }
        }
        return names;

    }

    // 扫描文件夹里面的数据
    public ArrayList<String> folderScan(String path) {
        File file = new File(path);
        ArrayList<String> names = new ArrayList<String>();
        if (file.isDirectory()) {
            File[] array = file.listFiles();

            for (int i = 0; i < array.length; i++) {
                File f = array[i];

                if (f.isFile()) {// FILE TYPE
                    String name = f.getName();
                    if (name.contains(".jpg")) {
                        names.add(name);
                        fileScan(f.getAbsolutePath());
                    }
                } else {// FOLDER TYPE
                    folderScan(f.getAbsolutePath());
                }
            }
        }
        return names;
    }

    // 扫描
    public void fileScan(String file) {
        Uri data = Uri.parse("file://" + file);
        sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, data));
    }

    protected void onDestroy() {
        // 避免窗体泄露
        if (popupWindow != null) {
            popupWindow.dismiss();
            popupWindow = null;
        }
        super.onDestroy();
    }
}