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;
}

}

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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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