Android 动态权限申请

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
initializePlayer();
} else {
showToast(R.string.storage_permission_denied);
finish();
}
}

/**

• Checks whether it's necessary to request the {@link permission#READ_EXTERNAL_STORAGE}
• permission read the specified {@link Uri}s, requesting the permission if necessary.
• @param activity The host activity for checking and requesting the permission.
• @param uris {@link Uri}s that may require {@link permission#READ_EXTERNAL_STORAGE} to read.
• @return Whether a permission request was made.
  */
  @TargetApi(23)
  public static boolean maybeRequestReadExternalStoragePermission(Activity activity, Uri... uris) {
  if (Util.SDK_INT < 23) {
  return false;
  }
  for (Uri uri : uris) {
  if (Util.isLocalFileUri(uri)) {
  if (activity.checkSelfPermission(permission.READ_EXTERNAL_STORAGE)
  != PackageManager.PERMISSION_GRANTED) {
  activity.requestPermissions(new String[] {permission.READ_EXTERNAL_STORAGE}, 0);
  return true;
  }
  break;
  }
  }
  return false;
  }

/**

• Like {@link android.os.Build.VERSION#SDK_INT}, but in a place where it can be conveniently
• overridden for local testing.
  */
  public static final int SDK_INT =
  (Build.VERSION.SDK_INT == 25 && Build.VERSION.CODENAME.charAt(0) == 'O') ? 26
  : Build.VERSION.SDK_INT;