Android中代碼申請權限（應對android6.0以上）

if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.WRITE_EXTERNAL_STORAGE)
                != PERMISSION_GRANTED) {//判斷是否已經賦予權限
            if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                    Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                //這里可以寫個對話框之類的項向用戶解釋為什么要申請權限，並在對話框的確認鍵后續再次申請權限.它在用戶選擇"不再詢問"的情況下返回false

            } else {
                //申請權限，字符串數組內是一個或多個要申請的權限，1是申請權限結果的返回參數，在onRequestPermissionsResult可以得知申請結果
                ActivityCompat.requestPermissions(this,
                        new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
                                Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
}}

重寫onRequestPermissionsResult
{
if (requestCode == 1) {//requestCode的值是上邊的1 
            for (int i = 0; i < permissions.length; i++) {
                if (grantResults[i] == PERMISSION_GRANTED) {
                    Toast.makeText(this, "" + "權限" + permissions[i] + "申請成功", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(this, "" + "權限" + permissions[i] + "申請失敗", Toast.LENGTH_SHORT).show();
                }
            }
        }
}

　　

宿主Activity中
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
  {
       super.onRequestPermissionsResult(requestCode, permissions, grantResults);
       // 獲取到Activity下的Fragment
       List<Fragment> fragments = getSupportFragmentManager().getFragments();
       if (fragments == null)
       {
           return;
       }
       // 查找在Fragment中onRequestPermissionsResult方法並調用
       for (Fragment fragment : fragments)
       {
           if (fragment != null)
           {
               // 這里就會調用我們Fragment中的onRequestPermissionsResult方法
               fragment.onRequestPermissionsResult(requestCode, permissions, grantResults);
           }
       }
   }

2.Fragment 中 只用如下方式請求權限

fragment.requestPermissions(mPermissionList,REQUEST_CODE_CAMERA)
而不是 ActivityCompat/ContextCompat

ActivityCompat.requestPermissions((AppCompatActivity)context, new String[]{Manifest.permission.CAMERA}, PERMISSION_REQUEST_CODE)