铁路压实系统移动客户端（Android）.zip

package com.railwaycompactionsystemmobileclient; import com.facebook.react.ReactActivity; import com.github.mjdev.libaums.UsbMassStorageDevice; import com.github.mjdev.libaums.fs.FileSystem; import com.github.mjdev.libaums.fs.UsbFile; import com.github.mjdev.libaums.fs.UsbFileInputStream; import com.github.mjdev.libaums.partition.Partition; import com.ldm.androidudisk.utils.FileUtil; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.IntentFilter; import android.hardware.usb.UsbDevice; import android.hardware.usb.UsbManager; import android.os.Bundle; import org.devio.rn.splashscreen.SplashScreen; import android.content.Intent; // <--- import import android.content.res.Configuration; // <--- import import android.os.Handler; import android.os.Message; import android.text.TextUtils; import android.util.Log; import android.widget.Toast; import java.io.BufferedReader; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; public class MainActivity extends ReactActivity { //自定义U盘读写权限 private static final String ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION"; //当前处接U盘列表 private UsbMassStorageDevice[] storageDevices; //当前U盘所在文件目录 private UsbFile cFolder; private final static String U_DISK_FILE_NAME = "u_disk.txt"; /** * Returns the name of the main component registered from JavaScript. * This is used to schedule rendering of the component. */ @Override protected void onCreate(Bundle savedInstanceState) { SplashScreen.show(this); // here super.onCreate(savedInstanceState); registerUDiskReceiver(); } @Override protected String getMainComponentName() { return "RailwayCompactionSystemMobileClient"; } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); Intent intent = new Intent("onConfigurationChanged"); intent.putExtra("newConfig", newConfig); this.sendBroadcast(intent); } private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case 100: showToastMsg("保存成功"); break; case 101: String txt = msg.obj.toString(); if (!TextUtils.isEmpty(txt)) // u_disk_show.setText("读取到的数据是：" + txt); break; } } }; //从U盘读取文件 private void readFromUDisk() { UsbFile[] usbFiles = new UsbFile[0]; try { usbFiles = cFolder.listFiles(); } catch (IOException e) { e.printStackTrace(); } if (null != usbFiles && usbFiles.length > 0) { for (UsbFile usbFile : usbFiles) { if (usbFile.getName().equals(U_DISK_FILE_NAME)) { readTxtFromUDisk(usbFile); } } } } /** * @description 保存数据到U盘，目前是保存到根目录的 * @author ldm * @time 2017/9/1 17:17 */ private void saveText2UDisk(String content) { //项目中也把文件保存在了SD卡，其实可以直接把文本读取到U盘指定文件 File file = FileUtil.getSaveFile(getPackageName() + File.separator + FileUtil.DEFAULT_BIN_DIR, U_DISK_FILE_NAME); try { FileWriter fw = new FileWriter(file); fw.write(content); fw.close(); } catch (IOException e) { e.printStackTrace(); } if (null != cFolder) { FileUtil.saveSDFile2OTG(file, cFolder); mHandler.sendEmptyMessage(100); } } /** * @description OTG广播注册 * @author ldm * @time 2017/9/1 17:19 */ private void registerUDiskReceiver() { //监听otg插入 拔出 IntentFilter usbDeviceStateFilter = new IntentFilter(); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED); registerReceiver(mOtgReceiver, usbDeviceStateFilter); //注册监听自定义广播 IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION); registerReceiver(mOtgReceiver, filter); } /** * @description OTG广播，监听U盘的插入及拔出 * @author ldm * @time 2017/9/1 17:20 * @param */ private BroadcastReceiver mOtgReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); switch (action) { case ACTION_USB_PERMISSION://接受到自定义广播 UsbDevice usbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); //允许权限申请 if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) { if (usbDevice != null) { //用户已授权，可以进行读取操作 readDevice(getUsbMass(usbDevice)); } else { showToastMsg("没有插入U盘"); } } else { showToastMsg("未获取到U盘权限"); } break; case UsbManager.ACTION_USB_DEVICE_ATTACHED://接收到U盘设备插入广播 UsbDevice device_add = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); if (device_add != null) { //接收到U盘插入广播，尝试读取U盘设备数据 redUDiskDevsList(); } break; case UsbManager.ACTION_USB_DEVICE_DETACHED://接收到U盘设设备拔出广播 showToastMsg("U盘已拔出"); break; } } }; /** * @description U盘设备读取 * @author ldm * @time 2017/9/1 17:20 */ private void redUDiskDevsList() { //设备管理器 UsbManager usbManager = (UsbManager) getSystemService(Context.USB_SERVICE); //获取U盘存储设备 storageDevices = UsbMassStorageDevice.getMassStorageDevices(this); PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0); //一般手机只有1个OTG插口 for (UsbMassStorageDevice device : storageDevices) { //读取设备是否有权限 if (usbManager.hasPermission(device.getUsbDevice())) { readDevice(device); } else { //没有权限，进行申请 usbManager.requestPermission(device.getUsbDevice(), pendingIntent); } } if (storageDevices.length == 0) { showToastMsg("请插入可用的U盘"); } } private UsbMassStorageDevice getUsbMass(UsbDevice usbDevice) { for (UsbMassStorageDevice device : storageDevices) { if (usbDevice.equals(device.getUsbDevice())) { return device; } } return null; } private void readDevice(UsbMassStorageDevice device) { try { device.init();//初始化 //设备分区 Partition partition = device.getPartitions().get(0); //文件系统 FileSystem currentFs = partition.getFileSystem(); currentFs.getVolumeLabel();//可以获�