標籤:
sd卡狀態、路徑、可用空間byte,參考http://ai4work.blog.163.com/blog/static/189873306201182310304586/
記憶體,參考http://blog.csdn.net/hudashi/article/details/7050897
manifest許可權:
<!-- 在SDCard中建立與刪除檔案許可權 --> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/> <!-- 往SDCard寫入資料許可權 --> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
code:
package com.test;import android.app.Activity;import android.app.ActivityManager;import android.os.Bundle;import android.os.Environment;import android.os.StatFs;import android.util.Log;public class Test2 extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); int i = 0; while (i < 1) { try { System.out.println("1: " + checkSDCard()); String path = getExternalStoragePath(); System.out.println("2: " + path); if (path != null) { System.out.println("3: " + (getAvailableStore(path)>>20) + "MB"); } displayBriefMemory(); } catch (Exception e) { e.printStackTrace(); } i++; } } //記憶體相關 private void displayBriefMemory() { final ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE); ActivityManager.MemoryInfo info = new ActivityManager.MemoryInfo(); activityManager.getMemoryInfo(info); Log.i("System.out", "系統剩餘記憶體:"+(info.availMem >> 20)+"MB"); Log.i("System.out", "系統是否處於低記憶體運行:"+info.lowMemory); Log.i("System.out", "當系統剩餘記憶體低於" + (info.threshold >> 20) + "MB時就看成低記憶體運行"); } // 檢查SD卡狀態 private boolean checkSDCard() { if (Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) { return true; } return false; } // 擷取SD卡路徑 public static String getExternalStoragePath() { // 擷取SdCard狀態 String state = android.os.Environment.getExternalStorageState(); // 判斷SdCard是否存在並且是可用的 if (android.os.Environment.MEDIA_MOUNTED.equals(state)) { if (android.os.Environment.getExternalStorageDirectory().canWrite()) { return android.os.Environment.getExternalStorageDirectory() .getPath(); } } return null; } /** * * 擷取儲存卡的剩餘容量,單位為位元組 * * * @param filePath * * * @return availableSpare * * */ public static long getAvailableStore(String filePath) { // 取得sdcard檔案路徑 StatFs statFs = new StatFs(filePath); // 擷取block的SIZE long blocSize = statFs.getBlockSize(); // 擷取BLOCK數量 // long totalBlocks = statFs.getBlockCount(); // 可使用的Block的數量 long availaBlock = statFs.getAvailableBlocks(); // long total = totalBlocks * blocSize; long availableSpare = availaBlock * blocSize; return availableSpare; }}
android sd卡狀態、路徑、可用空間,記憶體