从片段中获取字符串

Question

考虑一下： MainActivity有TextView id = txtMain;

Activity2有一个名为Fragment1;

的片段

Fragment1有TextView id = txtFrag;

如何从片段中获取字符串，以便出现在MainActivity中？ 我尝试使用Bundle但不会工作。

Answer 1

这是使用Bundles的工作代码，您可以检查代码是否有错误或在此处发布以供审核。

MainActivity.java

    String textViewText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        Bundle textBundle=getIntent().getExtras();
        textViewText=textBundle.get("TextView").toString();


    }

    @Override
    protected void onResume() {  // used onResume because until this call activity is created completely
        super.onResume();


        TextView textViewWidget=(TextView) findViewById(R.id.textView);
        textViewWidget.setText(textViewTexts);
    }

Fragment1.java

TextView text;

 @Override
    public View onCreateView(LayoutInflater inflater,
                             ViewGroup container, Bundle
                                     savedInstanceState) {

        // Inflate the layout for this fragment
        final View view =  inflater.inflate(R.layout.toolbar_fragment,
                container, false);

 Button newActivity=(Button) view.findViewById(R.id.new_activity_button);
        newActivity.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                    text=(TextView) view.findViewById(R.id.txtFrag);

                    Intent newActivityIntent=new Intent(getActivity(),Main2Activity.class);
                    newActivityIntent.putExtra("TextView",text.getText());
                    startActivity(newActivityIntent);


            }
        });

}