用于适配不同型号手机，反射获取SD卡路径和状态
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<span style="font-size:18px;">package net.lockapp.appmanager.utils;import java.io.File;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.concurrent.ConcurrentLinkedQueue;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import android.content.Context;import android.os.Environment;import android.os.StatFs;import android.os.storage.StorageManager;import android.text.TextUtils;import android.util.Log;/** * 用于适配不同型号手机，反射获取SD卡路径和状态 * @author johdan * */public class DevMountInfo { private final String TAG = DevMountInfo.class.getSimpleName(); private static final int ERROR = -1; // class name private final static String CLASS_NAME = "android.os.storage.StorageVolume"; //remained spare memory size private static final int REMAINED_SPARE_IN_MB = 100; // method name private final static String METHOD_GET_VOLUME_LIST = "getVolumeList"; private final static String METHOD_GET_VOLUME_STATE = "getVolumeState"; private final static String METHOD_IS_REMOVABLE = "isRemovable"; private final static String METHOD_GET_PATH = "getPath"; private final static String MOUNTED = "mounted"; private static DevMountInfo INSTANCE; private String mSDCardPath = null; // internal file path private ConcurrentLinkedQueue<String> mInternalPathList = new ConcurrentLinkedQueue<String>(); // external file path private ConcurrentLinkedQueue<String> mExternalPathList = new ConcurrentLinkedQueue<String>(); private ExecutorService mExecutor = null; private DevMountInfo() { mExecutor = Executors.newSingleThreadExecutor(); } public static DevMountInfo getInstance() { synchronized (DevMountInfo.class) { if (null == INSTANCE) { INSTANCE = new DevMountInfo(); } return INSTANCE; } } @Override protected void finalize() throws Throwable { super.finalize(); synchronized (DevMountInfo.class) { mInternalPathList.clear(); mExternalPathList.clear(); mExecutor.shutdown(); INSTANCE = null; } } public void init(final Context context) { mExecutor.execute(new Runnable() { @Override public void run() { executeInit(context); } }); } public boolean isSDCardFull() { return REMAINED_SPARE_IN_MB > (getSDCardAvailSpace() * 1024); } public boolean isSDCardAvaiable() { return !mExternalPathList.isEmpty() || !mInternalPathList.isEmpty(); } public String getSDCardPath() { return mSDCardPath; } public long getSDCardTotalSpace() { long totalSpace = 0; if (!TextUtils.isEmpty(mSDCardPath)) { StatFs sf = new StatFs(mSDCardPath); long blockSize = sf.getBlockSize(); long total = sf.getBlockCount(); totalSpace = total * blockSize / 1024; } return totalSpace; } public long getSDCardAvailSpace() { long availSpace = 0; if (!TextUtils.isEmpty(mSDCardPath)) { StatFs sf = new StatFs(mSDCardPath); long blockSize = sf.getBlockSize(); long availCount = sf.getAvailableBlocks(); availSpace = availCount * blockSize / 1024; } return availSpace; } public String getInternalSDCardPath() { return mInternalPathList.peek(); } public String getExternalSDCardPath() { return mExternalPathList.peek(); } private void executeInit(Context context) { StorageManager mStorageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE); if (mStorageManager != null) { Class<?> mStorageVolume = null; Method mGetVolumeListMethod = null; Method mGetVolumeStateMethod = null; Method mGetPathMethod = null; Method mIsRemovableMethod = null; Object[] mStorageVolumeList = null; try { mStorageVolume = Class.forName(CLASS_NAME); mGetVolumeListMethod = mStorageManager.getClass().getMethod(METHOD_GET_VOLUME_LIST, new Class[0]); mGetVolumeStateMethod = mStorageManager.getClass().getMethod(METHOD_GET_VOLUME_STATE, new Class[] { String.class }); mIsRemovableMethod = mStorageVolume.getMethod(METHOD_IS_REMOVABLE, new Class[0]); mGetPathMethod = mStorageVolume.getMethod(METHOD_GET_PATH, new Class[0]); mStorageVolumeList = (Object[]) mGetVolumeListMethod.invoke(mStorageManager, new Object[0]); boolean mIsRemovable = false; if (mStorageVolumeList != null && mStorageVolumeList.length > 0) { int mStorageVolumeCount = mStorageVolumeList.length; if(Env.DEG){ Log.i(TAG, "init() === > StorageVolume Count = " + mStorageVolumeCount); } mInternalPathList.clear(); mExternalPathList.clear(); for (int i = 0; i < mStorageVolumeCount; ++i) { String mStoragePath = (String) mGetPathMethod.invoke(mStorageVolumeList[i], new Object[0]); mIsRemovable = ((Boolean) mIsRemovableMethod.invoke(mStorageVolumeList[i], new Object[0])).booleanValue(); if (!TextUtils.isEmpty(mStoragePath)) { String state = (String) mGetVolumeStateMethod.invoke(mStorageManager, new Object[] { mStoragePath }); if ((state != null) && (state.equals(MOUNTED))) { if (mIsRemovable) { if(Env.DEG){ Log.i(TAG, "init() === > external storage path = (" + mStoragePath + ")"); } mExternalPathList.add(mStoragePath); } else { if(Env.DEG){ Log.i(TAG, "init() === > internal storage path = (" + mStoragePath + ")"); } mInternalPathList.add(mStoragePath); } } } } } } catch (ClassNotFoundException e) { handleInvalid(); if(Env.DEG){ Log.e(TAG, "init() === > Exception:ClassNotFoundException"); } } catch (NoSuchMethodException e) { handleInvalid(); if(Env.DEG){ Log.e(TAG, "init() === > Exception:NoSuchMethodException"); } } catch (IllegalArgumentException e) { handleInvalid(); if(Env.DEG){ Log.e(TAG, "init() === > Exception:IllegalArgumentException"); } } catch (IllegalAccessException e) { handleInvalid(); if(Env.DEG){ Log.e(TAG, "init() === > Exception:IllegalAccessException"); } } catch (InvocationTargetException e) { handleInvalid(); if(Env.DEG){ Log.e(TAG, "init() === > Exception:InvocationTargetException"); } } } else { handleInvalid(); if(Env.DEG){ Log.e(TAG, "init() === > can't get storage manager"); } } initSDCardPath(); } private void handleInvalid() { mInternalPathList.add(Environment.getExternalStorageDirectory().getPath()); } private void initSDCardPath() { if (!mExternalPathList.isEmpty()) { mSDCardPath = mExternalPathList.peek(); } else if (!mInternalPathList.isEmpty()) { mSDCardPath = mInternalPathList.peek(); } else { mSDCardPath = Environment.getExternalStorageDirectory().getPath(); } if(Env.DEG){ Log.i(TAG, "initSDCardPath() === > SDCARD PATH = (" + mSDCardPath + ")"); } } /** * SDCARD是否存 */ public static boolean externalMemoryAvailable() { return android.os.Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED); } /** * 获取手机内部剩余存储空间 * @return */ public static long getAvailableInternalMemorySize() { File path = Environment.getDataDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long availableBlocks = stat.getAvailableBlocks(); return availableBlocks * blockSize; } /** * 获取手机内部总的存储空间 * @return */ public static long getTotalInternalMemorySize() { File path = Environment.getDataDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long totalBlocks = stat.getBlockCount(); return totalBlocks * blockSize; } /** * 获取手机内置存储剩余存储空间 * @return */ public static long getAvailableInternalSystemMemorySize() { File path = Environment.getRootDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long availableBlocks = stat.getAvailableBlocks(); return availableBlocks * blockSize; } /** * 获取手机内置存储总的存储空间 * @return */ public static long getTotalInternalSystemMemorySize() { File path = Environment.getRootDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long totalBlocks = stat.getBlockCount(); return totalBlocks * blockSize; } /** * 获取SDCARD剩余存储空间 * @return */ public static long getAvailableExternalMemorySize() { if (externalMemoryAvailable()) { File path = Environment.getExternalStorageDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long availableBlocks = stat.getAvailableBlocks(); return availableBlocks * blockSize; } else { return ERROR; } } /** * 获取SDCARD总的存储空间 * @return */ public static long getTotalExternalMemorySize() { if (externalMemoryAvailable()) { File path = Environment.getExternalStorageDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long totalBlocks = stat.getBlockCount(); return totalBlocks * blockSize; } else { return ERROR; } } public static long getAvailableMemorySize(String path){ if(null == path) return 0; StatFs stat = new StatFs(path); long blockSize = stat.getBlockSize(); long availableBlocks = stat.getAvailableBlocks(); return availableBlocks * blockSize; } }</span> 0 0
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