Android之使用Activity与Fragment通信

一、Fragment—布局

二、Fragment—Java代码

public class FragmentSetterGetter extends Fragment {    private TextView tvContent;    public FragmentSetterGetter() {    }    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.fragment_fragment_setter_getter, container, false);        tvContent = view.findViewById(R.id.tv_content);        return view;    }    public void setContemt(String content) {        tvContent.setText(content);    }    public String getContent() {        return tvContent.getText().toString();    }}

三、Activity—Java代码

public class IndexActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_index);     }}

四、关联

        fragment = new FragmentSetArgument();        fragmentManager = getSupportFragmentManager();        FragmentTransaction transaction = fragmentManager.beginTransaction();        transaction.replace(R.id.fragment_container, fragment);        transaction.commit();

五、通信

        private String[] categorys = new String[]{"国际品牌", "奢饰品", "唯品会", "男装", "女装"};        categoryList.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                 fragment.setContemt(categorys[position]);            }        });

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