[移动开发]Android 简易浏览器，跳转到指定目录

public class SelectorFileActivity extends Activity{
@BindView(R.id.btn_back)
ImageView btnBack;
@BindView(R.id.selector_file_lsit)
RecyclerView selectorFileLsit;
@BindView(R.id.file_path)
TextView filePath;
File[] currentfiles;
String pathfile;
File parentfile;
@BindView(R.id.no_files)
TextView noFiles;
@BindView(R.id.search_file)
EditText searchFile;
@BindView(R.id.search_img)
ImageView searchImg;
private Intent intent;
private Bundle bundle;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_selector_file_list);
    ButterKnife.bind(this);
    initData();
}

private void initData() {
    intent = getIntent();
    bundle = intent.getExtras();
    int type = intent.getIntExtra("type", 0);
    File file = new File("要跳转的路径");
    if (!file.exists()) {//判断文件是否存在
        try {
            //按照指定的路径创建文件夹
            file.mkdirs();
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
    pathfile = file.getAbsolutePath(); // 获取绝对路径
    filePath.setText("当前路径为" + pathfile);
    parentfile = file;//父级路径
    currentfiles = file.listFiles();当前路径下的所有文件
    this.inflatefiles(currentfiles);
    btnBack.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (parentfile.toString().equals(Environment.getExternalStorageDirectory().toString())) {
                finish();
            } else {
                //当点击上一级时，使用parentfile，来刷新listview,
                parentfile = parentfile.getParentFile();
                currentfiles = parentfile.listFiles();
                SelectorFileActivity.this.inflatefiles(currentfiles);
                filePath.setText("当前路径为" + parentfile.getAbsolutePath());
            }


        }
    });
}

public void inflatefiles(final File[] files) {
    List<String> list = new ArrayList<>();
    List<String> searchList = new ArrayList<>();
    Log.i("lenght", String.valueOf(files.length));
    for (int i = 0; i < files.length; i++) {
        list.add(files[i].getName());
    }
    if (files.length < 1) {
        selectorFileLsit.setVisibility(View.GONE);
        noFiles.setVisibility(View.VISIBLE);
        return;
    }
    selectorFileLsit.setVisibility(View.VISIBLE);
    noFiles.setVisibility(View.GONE);
    LinearLayoutManager linearLayoutManager = new 	LinearLayoutManager(SelectorFileActivity.this);
    selectorFileLsit.setLayoutManager(linearLayoutManager);
    FileAdapter fileAdapter = new FileAdapter(SelectorFileActivity.this, list, files);
    selectorFileLsit.setAdapter(fileAdapter);
    fileAdapter.setItemClick(new FileAdapter.setOnClick() {
        @Override
        public void setItemClick(int position) {
            if (files[position].isFile()) {
                String absolutePath = files[position].getAbsolutePath();
                bundle.putString("path", absolutePath);//添加要返回的数据
                intent.putExtras(bundle);
                SelectorFileActivity.this.setResult(Activity.RESULT_OK, intent);
                SelectorFileActivity.this.finish();
                return;
            } else {
                if (files[position].listFiles() != null) {
                    File[] f = files[position].listFiles();
                    currentfiles = f;
                    SelectorFileActivity.this.inflatefiles(f);
                    pathfile = files[position].getAbsolutePath();
                    filePath.setText("当前路径" + pathfile);
                    parentfile = files[position];
                }
            }
        }
    });
}

}