如何从android中的java类调用片段？答案

【问题标题】：How to call fragment from a java class in android?如何从android中的java类调用片段？
【发布时间】：2017-03-27 15:02:39
【问题描述】：

我正在从一个 java 类中调用一个片段，单击一个文本视图我正在调用一个片段，这是我的 onclick 代码。

returnTheProduct.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
              FragmentManager fragmentManager = context.getFragmentManager();
              FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
              ProductReturnFragment productReturnFragment = new ProductReturnFragment();
              fragmentTransaction.replace(R.id.layout_marketplace_forms, new MarketPlaceFormsActivity());
              fragmentTransaction.addToBackStack(null);
              fragmentTransaction.commit();
            }
          });

【问题讨论】：

how can I call fragment from activity in android的可能重复

标签： android

【解决方案1】：

添加喜欢：

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    if (isBackPressed)
        fragmentTransaction.addToBackStack(null);
    fragmentTransaction.replace(R.id.framelayout,attachedfragmentHere);
    fragmentTransaction.setCustomAnimations(R.anim.fade_in,R.anim.fade_out);
    fragmentTransaction.commit();

【讨论】：

【解决方案2】：

只需导入以下两条语句：

import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

还有，

private FragmentTransaction mFragmentTransaction;
private FragmentManager mFragmentManager;
.....

然后在您的点击监听器上，您可以编写以下代码：

mFragmentManager = getSupportFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.replace(R.id.layout_marketplace_forms, new ProductReturnFragment());
mFragmentTransaction.commit();

希望你能得到答案。 :D

【讨论】：

【解决方案3】：

From class call Activity on which you are calling fragments like below code.

Intent intent = new Intent(context, CallingActivity.class);

         intent.putExtra("key", "value");
          context.startActivity(returnFormIntent);

In your CallingActivity define below code.
private FragmentManager fragmentManager = getSupportFragmentManager(); 
private YourFragment yourFragment;

if (getIntent().hasExtra("key")) {
      FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
      yourFragment = new YourFragment();
      fragmentTransaction.add(R.id.layout_your_fragment, yourFragment);
      fragmentTransaction.commit();

    }

like above we can call fragments from other nonActivity classes.

【讨论】：