爱心e站 v1.0.0 - FilePickerActivity.java 源代码

package com.newheyd.JZKFcanjiren.Utils.FileSelect;

import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import com.newheyd.JZKFcanjiren.R;
import java.io.File;
import java.util.ArrayList;

public class FilePickerActivity extends Activity {
    private FileChooserAdapter mAdatper;
    private ArrayList<FileInfoBean> mFileLists;
    private String mLastFilePath;
    private String mSdcardRootPath;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_file_picker);
        requestPermission();
        initView();
    }

    private void initView() {
        RecyclerView recycle = (RecyclerView) findViewById(R.id.rvContainer);
        GridLayoutManager manager = new GridLayoutManager(this, 3);
        recycle.setLayoutManager(manager);
        this.mFileLists = new ArrayList<>();
        this.mAdatper = new FileChooserAdapter(this, this.mFileLists);
        recycle.setAdapter(this.mAdatper);
        this.mSdcardRootPath = Environment.getExternalStorageDirectory().getAbsolutePath();
        updateFileItems(this.mSdcardRootPath);
        findViewById(R.id.tv_back).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FilePickerActivity.this.backProcess();
            }
        });
    }

    public void updateFileItems(String filePath) {
        this.mLastFilePath = filePath;
        if (this.mFileLists == null) {
            this.mFileLists = new ArrayList<>();
        }
        if (!this.mFileLists.isEmpty()) {
            this.mFileLists.clear();
        }
        File[] files = folderScan(filePath);
        if (files != null) {
            for (int i = 0; i < files.length; i++) {
                if (!files[i].isHidden()) {
                    String fileAbsolutePath = files[i].getAbsolutePath();
                    String fileName = files[i].getName();
                    boolean isDirectory = false;
                    if (files[i].isDirectory()) {
                        isDirectory = true;
                    }
                    FileInfoBean fileInfo = new FileInfoBean(fileAbsolutePath, fileName, isDirectory);
                    this.mFileLists.add(fileInfo);
                }
            }
            if (this.mAdatper != null) {
                this.mAdatper.notifyDataSetChanged();
            }
        }
    }

    private File[] folderScan(String path) {
        File file = new File(path);
        File[] files = file.listFiles();
        return files;
    }

    public void backProcess() {
        if (!this.mLastFilePath.equals(this.mSdcardRootPath)) {
            File thisFile = new File(this.mLastFilePath);
            String parentFilePath = thisFile.getParent();
            updateFileItems(parentFilePath);
        } else {
            setResult(0);
            finish();
        }
    }

    public void requestPermission() {
        if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(this, "android.permission.WRITE_EXTERNAL_STORAGE") != 0) {
            ActivityCompat.requestPermissions(this, new String[]{"android.permission.WRITE_EXTERNAL_STORAGE", "android.permission.READ_EXTERNAL_STORAGE"}, 129);
        }
    }
}