allprojects {
    repositories {
        ...
        mavenCentral()
        maven { url 'https://jitpack.io' }
    }
}

dependencyResolutionManagement {
    repositories {
    	...
        mavenCentral()
        maven { url 'https://jitpack.io' }
    }
}

dependencies {
    ...
    // 建议使用最新发布版，最新发布版请看上面
    // 请将"版本"替换成具体的版本号，如 1.1.16
    implementation 'io.github.molihuan:pathselector:版本'
}

//如果没有权限会自动申请权限
PathSelector.build(this, MConstants.BUILD_DIALOG)//Dialog构建方式
        .setMorePopupItemListeners(
                new CommonItemListener("OK") {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        
                        /**取消dialog弹窗
 * pathSelectFragment.close();
 */

                        StringBuilder builder = new StringBuilder();
                        builder.append("you selected:\n");
                        for (FileBean fileBean : selectedFiles) {
                            builder.append(fileBean.getPath() + "\n");
                        }
                        Mtools.toast(builder.toString());

                        return false;
                    }
                }
        )
        .show();//开始构建

//开启调试模式，生产环境请关闭
PathSelectorConfig.setDebug(true);
//或者PathSelector.setDebug(true);

//Activity构建方式
PathSelectFragment selector = PathSelector.build(this, MConstants.BUILD_ACTIVITY)
        .setRequestCode(635)
        .setMorePopupItemListeners(
                new CommonItemListener("OK") {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {

                        StringBuilder builder = new StringBuilder();
                        builder.append("you selected:\n");
                        for (FileBean fileBean : selectedFiles) {
                            builder.append(fileBean.getPath() + "\n");
                        }
                        Mtools.toast(builder.toString());

                        return false;
                    }
                }
        )
        .show();

//获取PathSelectFragment实例然后在onBackPressed中处理返回按钮点击事件
PathSelectFragment selector = PathSelector.build(this, MConstants.BUILD_FRAGMENT)
        .setFrameLayoutId(R.id.fragment_select_show_area)//加载位置,FrameLayout的ID
        .setMorePopupItemListeners(
                new CommonItemListener("OK") {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {

                        StringBuilder builder = new StringBuilder();
                        builder.append("you selected:\n");
                        for (FileBean fileBean : selectedFiles) {
                            builder.append(fileBean.getPath() + "\n");
                        }
                        
                        Mtools.toast(builder.toString());
                        return false;
                    }
                }
        )
        .show();//开始构建

@Override
public void onBackPressed() {

    //让PathSelectFragment先处理返回按钮点击事件
    if (selector != null && selector.onBackPressed()) {
        return;
    }
    ......
    super.onBackPressed();
}

//获取PathSelectFragment实例然后在onBackPressed中处理返回按钮点击事件
PathSelectFragment selector = PathSelector.build(this, MConstants.BUILD_DIALOG)
        //.setBuildType(MConstants.BUILD_DIALOG)//已经在build中已经设置了
        //.setContext(this)//已经在build中已经设置了
        .setRootPath("/storage/emulated/0/")//初始路径
        .setShowSelectStorageBtn(true)//是否显示内部存储选择按钮
        .setShowTitlebarFragment(true)//是否显示标题栏
        .setShowTabbarFragment(true)//是否显示面包屑
        .setAlwaysShowHandleFragment(true)//是否总是显示长按弹出选项
        .setShowFileTypes("", "mp3", "mp4")//只显示(没有后缀)或(后缀为mp3)或(后缀为mp4)的文件
        .setSelectFileTypes("", "mp3")//只能选择(没有后缀)或(后缀为mp3)的文件
        .setMaxCount(3)//最多可以选择3个文件,默认是-1不限制
        .setRadio()//单选(如果需要单选文件夹请使用setMaxCount(0)来替换)
        .setSortType(MConstants.SORT_NAME_ASC)//按名称排序
        .setTitlebarMainTitle(new FontBean("My Selector"))//设置标题栏主标题,还可以设置字体大小,颜色等
        .setTitlebarBG(Color.GREEN)//设置标题栏颜色
        .setFileItemListener(//设置文件item点击回调(点击是文件才会回调,如果点击是文件夹则不会)
                new FileItemListener() {
                    @Override
                    public boolean onClick(View v, FileBean file, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        Mtools.toast("you clicked path:\n" + file.getPath());
                        return false;
                    }
                }
        )
        .setMorePopupItemListeners(//设置右上角选项回调
                new CommonItemListener("SelectAll") {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        pathSelectFragment.selectAllFile(true);
                        return false;
                    }
                },
                new CommonItemListener("DeselectAll") {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        pathSelectFragment.selectAllFile(false);
                        return false;
                    }
                }
        )
        .setHandleItemListeners(//设置长按弹出选项回调
                new CommonItemListener("OK") {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        StringBuilder builder = new StringBuilder();
                        builder.append("you selected:\n");
                        for (FileBean fileBean : selectedFiles) {
                            builder.append(fileBean.getPath() + "\n");
                        }
                        Mtools.toast(builder.toString());
                        return false;
                    }
                },
                new CommonItemListener("cancel") {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        pathSelectFragment.openCloseMultipleMode(false);
                        return false;
                    }
                }
        )
        .show();

PathSelectFragment selector = PathSelector.build(this, MConstants.BUILD_DIALOG)
        .setHandleItemListeners(//设置长按弹出选项回调
                //FontBean可以设置文本、字的大小、字的颜色、字左边的图标
    			//R.drawable.ic_test_mlh是你自己的图片资源id
                new CommonItemListener(new FontBean("OK", 18, Color.RED, R.drawable.ic_test_mlh)) {
                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        Mtools.toast("You Click");
                        return false;
                    }
                }
        )
        .show();

PathSelectFragment selector = PathSelector.build(this, MConstants.BUILD_DIALOG)
        .setHandleItemListeners(
                //重写CommonItemListener的setViewStyle方法来自定义样式
                new CommonItemListener("OK") {
                    @Override
                    public boolean setViewStyle(RelativeLayout container, ImageView leftImg, TextView textView) {
                        textView.setTextSize(18);
                        textView.setTextColor(Color.RED);
                        //默认是不显示图标的
                        leftImg.setVisibility(View.VISIBLE);
                        leftImg.setImageResource(R.drawable.ic_test_mlh);
                        leftImg.getLayoutParams().width = 90;
                        leftImg.getLayoutParams().height = 90;
                        return true;
                    }

                    @Override
                    public boolean onClick(View v, TextView tv, List<FileBean> selectedFiles, String currentPath, BasePathSelectFragment pathSelectFragment) {
                        Mtools.toast("You Click");
                        return false;
                    }
                }
        )
        .show();

public class CustomTitlebarFragment extends AbstractTitlebarFragment {
    private Button btn1;
    private Button btn2;
    
    @Override
    public int setFragmentViewId() {
        return R.layout.fragment_custom_titlebar;
    }

    @Override
    public void getComponents(View view) {
        btn1 = view.findViewById(R.id.my_btn1);
        btn2 = view.findViewById(R.id.my_btn2);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Mtools.toast("The current path is:\n" + psf.getCurrentPath());
            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                psf.selectAllFile(true);
            }
        });
    }
}

//获取PathSelectFragment实例然后在onBackPressed中处理返回按钮点击事件
PathSelectFragment selector = PathSelector.build(this, MConstants.BUILD_DIALOG)
        .setTitlebarFragment(new CustomTitlebarFragment())
        .show();

PathSelectFragment selector = PathSelector.build(this, MConstants.BUILD_DIALOG)
        .setFileBeanController(new AbstractFileBeanController() {
            @Override
            public int getFileBeanImageResource(boolean isDir, String extension, FileBean fileBean) {
                int resourceId;
                switch (extension) {
                    case "jpg":
                    case "jpeg":
                    case "png":
                        //开发者自己的图片资源id
                        resourceId = R.drawable.ic_launcher_foreground;
                        break;
                    case "mp3":
                        resourceId = R.drawable.ic_launcher_foreground;
                        break;
                    case "mp4":
                        //也可以使用默认的图片资源id
                        resourceId = com.molihuan.pathselector.R.mipmap.movie;
                        break;
                    default:
                        if (isDir) {
                            //开发者自己的图片资源id
                            resourceId = R.drawable.ml192;
                        } else {
                            resourceId = R.drawable.ic_launcher_background;
                        }
                        break;
                }
                return resourceId;
            }
        })
        .show();