RadioButton加Fragment，点击按钮替换布局，注册Fragment

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activity_main的布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    >    <!--将被替换的布局-->   <RelativeLayout       android:id="@+id/rela"       android:layout_weight="6"       android:layout_width="match_parent"       android:layout_height="0dp">   </RelativeLayout>    <RadioGroup        android:id="@+id/radio_group"        android:background="#fddfdd"        android:orientation="horizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content">        <RadioButton            android:checked="true"            android:id="@+id/btn_zhuce"            android:gravity="center"            android:padding="20dp"            android:textSize="23sp"            android:button="@null"            android:text="注册"            android:layout_width="0dp"            android:layout_weight="1"            android:layout_height="wrap_content" />        <RadioButton            android:id="@+id/btn_denglu"            android:gravity="center"            android:padding="20dp"            android:textSize="23sp"            android:button="@null"            android:text="登录"            android:layout_width="0dp"            android:layout_weight="1"            android:layout_height="wrap_content" />    </RadioGroup></LinearLayout>

Mainactivity的代码。获取id。替换布局

public class MainActivity extends AppCompatActivity {    private RelativeLayout relativeLayout;    private RadioGroup radioGroup;  //  private FragmentTransaction transaction;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //用fragment替换的布局        relativeLayout = (RelativeLayout) findViewById(R.id.rela);        radioGroup = (RadioGroup) findViewById(R.id.radio_group);        //进入页面先展示 注册页面       getSupportFragmentManager().beginTransaction().replace(R.id.rela,new ZhuceFragment()).commit();       // transaction = getSupportFragmentManager().beginTransaction();        //按钮选中的监听        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(RadioGroup radioGroup, int i) {                switch (i){                    case R.id.btn_zhuce:                        getSupportFragmentManager().beginTransaction().replace(R.id.rela,new ZhuceFragment()).commit();                        break;                    case R.id.btn_denglu:                        getSupportFragmentManager().beginTransaction().replace(R.id.rela,new DengluFragment()).commit();                        break;                }                    //执行替换                   // transaction.commit();            }        });    }}

ZhuceFragment里面

public class ZhuceFragment extends Fragment {    private EditText zhu_phone;    private EditText zhu_password;    private Button zhuce;    private MyPresenter myPresenter;    //注册页面    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {       //填充布局        View view = inflater.inflate(R.layout.fragment_zhuce,container,false);        zhu_phone = (EditText) view.findViewById(R.id.zhu_phone);        zhu_password = (EditText) view.findViewById(R.id.zhu_password);        zhuce = (Button) view.findViewById(R.id.zhuce);        return view;    }    @Override    public void onActivityCreated(@Nullable Bundle savedInstanceState) {        super.onActivityCreated(savedInstanceState);       //new出presenter对象        myPresenter = new MyPresenter(getActivity(), new MyPresenter.ZhuceViewCallBack() {            @Override            public void zhu_phone_empty() {                Toast.makeText(getActivity(), "注册手机号不能为空", Toast.LENGTH_SHORT).show();            }            @Override            public void zhu_pass_empty() {                Toast.makeText(getActivity(),"注册密码不能为空",Toast.LENGTH_SHORT).show();            }            @Override            public void zhu_success() {                Toast.makeText(getActivity(),"注册成功!请前往登录页面!",Toast.LENGTH_SHORT).show();            }            @Override            public void zhu_fail() {                Toast.makeText(getActivity(),"不存在!",Toast.LENGTH_SHORT).show();            }        }, new MyPresenter.LoginViewCallBack() {            @Override            public void deng_phone_empty() {            }            @Override            public void deng_pass_empty() {            }            @Override            public void deng_success() {            }            @Override            public void deng_fail() {            }        });        //点击注册按钮 调用p层去逻辑判断非空        zhuce.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                //p层逻辑判断                myPresenter.Zhuce_Panduan(zhu_phone.getText().toString(),zhu_password.getText().toString());            }        });    }}

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