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  • java 获取参数泛型类型

    import java.lang.reflect.ParameterizedType;
    
    public abstract class SampleObjectCallBack<T> {
        private Class<T> clazz;
    
        @SuppressWarnings("unchecked")
        public SampleObjectCallBack() {
            ParameterizedType type = (ParameterizedType) this.getClass()
                    .getGenericSuperclass();
            this.clazz = (Class<T>) type.getActualTypeArguments()[0];
        }
    
        public abstract void onSuccess(T t);
    
        public abstract void onError(int error, String msg);
    
        public Class<T> getClazz() {
            return clazz;
        }
    
    }

    用于(接口)回调中获取其泛型的类型。

      .................
    ..............

    String url = text; HMChatManager.getInstance().postByURL(url, null, new SampleObjectCallBack<Friend>() { @Override public void onSuccess(Friend t) { if (t != null) { Log.d("", "" + t.toString()); Intent intent = new Intent(QRActivity.this, FriendDetailActivity.class); intent.putExtra(FriendDetailActivity.KEY_ENTER, FriendDetailActivity.ENTER_SEARCH); intent.putExtra(FriendDetailActivity.KEY_DATA, t); startActivity(intent); finish(); } } @Override public void onError(int error, String msg) { if (error == 200) { ToastUtil.show(getApplicationContext(), "你扫描的用户不存在"); finish(); } } });

    .......
    .......

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  • 原文地址:https://www.cnblogs.com/hubing/p/4945069.html
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