Question

当我启动应用程序并输入按钮时，它出现错误“不幸的是，intenttest已经停止。

Fragment_Main.jave代码如下

public class Fragment_Main extends Fragment implements OnClickListener {
EditText studentID;

 public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
     }
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
       Bundle savedInstanceState) {
         View root = inflater.inflate(R.layout.fragment_main, container, false); 
         studentID = (EditText) root.findViewById(R.id.editText1);
         Button submit = (Button) root.findViewById(R.id.button1);
         submit.setOnClickListener(this);
            return root;
     }

     @Override
        public void onClick(View v) {
         Fragment frag = new Average();
            Intent intent = new Intent(getActivity(), Average.class);
            intent.putExtra("ID", studentID.getText().toString());
            startActivity(intent);

            FragmentManager fragmentManager = getFragmentManager();
            fragmentManager.beginTransaction().replace(R.id.container,frag).commit();
        }}

average.jave代码如下

public class Average extends Fragment {
TextView studentInfo;

public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
     }
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
       Bundle savedInstanceState) {
         View root = inflater.inflate(R.layout.fragment_average, container, false);
         studentInfo = (TextView) root.findViewById(R.id.textView2);
            Intent intent = getActivity().getIntent();//取得活動的Intent
            studentInfo.setText("學號:" + intent.getStringExtra("ID"));
            return root;
     }}

Answer 1

从Fragment您可以使用以下代码

开始活动

Intent intent = new Intent(getActivity(),yourclassname.class);
startActivity(intent);

如何开始活动或在片段中调用意图？

1 个答案: