在android6.0以后，需要runtime權限：requestPermissions方法。
具體如下：
PRivate static final int REQUEST_EXTERNAL_STORAGE = 1; private static String[] PERMISSIONS_STORAGE = { Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE }; //獲取動態權限 int hasWriteContactsPermission = ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE);//android.manifest.xml if (hasWriteContactsPermission != PackageManager.PERMISSION_GRANTED) { if (!ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE)) { Log.d("yx","get permission"); ActivityCompat.requestPermissions(MainActivity.this, PERMISSIONS_STORAGE, REQUEST_EXTERNAL_STORAGE); } Log.d("yx","get permission2"); ActivityCompat.requestPermissions(MainActivity.this, PERMISSIONS_STORAGE, REQUEST_EXTERNAL_STORAGE); } Log.d("yx","wait for PERMISSION_GRANTED"); while (( ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE))!= PackageManager.PERMISSION_GRANTED) { } Log.d("yx","wait for PERMISSION_GRANTED finish");還需要加入android-support-v4.jar庫。就可以或許android6.0以上的SD卡權限了。
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