java– 代码不起作用,按钮没有响应

概述我创建了将数据发送到数据库的注册活动,按钮必须打开另一个活动,即MainActivity.代码工作正常,但有一个问题.单击该按钮时,它会响应并将信息发送到数据库,但活动不会更改.我怎样才能更改代码以打开另一个活动？RegisterRequest.javapublicclassRegisterRequestextendsStringR

我创建了将数据发送到数据库的注册活动,按钮必须打开另一个活动,即MainActivity.代码工作正常,但有一个问题.单击该按钮时,它会响应并将信息发送到数据库,但活动不会更改.

我怎样才能更改代码以打开另一个活动？

RegisterRequest.java

public class RegisterRequest extends StringRequest {private static final String REGISTER_REQUEST_URL = "http://loginacti.comli.com/Register.PHP";private Map<String, String> params;public RegisterRequest(String Expect, String Prize, String name, String Email, Response.Listener<String> Listener) {        super(Method.POST, REGISTER_REQUEST_URL, Listener, null);    params = new HashMap<>();    params.put("Expect", Expect);    params.put("Prize", Prize);    params.put("name", name);    params.put("Email", Email);}@OverrIDepublic Map<String, String> getParams() {    return params;}

Registeractivity.java

public class Registeractivity extends AppCompatActivity {@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_register);    final EditText etUkNown = (EditText) findVIEwByID(R.ID.etUkNown);    final EditText etPrize = (EditText) findVIEwByID(R.ID.etPrize);    final EditText etname = (EditText) findVIEwByID(R.ID.etname);    final EditText etEmail = (EditText) findVIEwByID(R.ID.etEmail);    final button bRegister = (button) findVIEwByID(R.ID.bRegister);    bRegister.setonClickListener(new VIEw.OnClickListener() {        @OverrIDe        public voID onClick(VIEw v) {            final String Expect = etUkNown.getText().toString();            final String Prize = etPrize.getText().toString();            final String name = etname.getText().toString();            final String Email = etEmail.getText().toString();            Response.Listener<String> responseListener = new Response.Listener<String>(){                @OverrIDe                public voID onResponse(String response) {                    try {                        JsONObject JsonResponse = new JsONObject(response);                        boolean success = JsonResponse.getBoolean("success");                        if (success){                            Intent intent = new Intent(Registeractivity.this, MainActivity.class);                            Registeractivity.this.startActivity(intent);                        }else{                            AlertDialog.Builder builder = new AlertDialog.Builder(Registeractivity.this);                            builder.setMessage("Register Failed")                                    .setNegativebutton("Retry", null)                                    .create()                                    .show();                        }                    } catch (JsONException e) {                        e.printstacktrace();                    }                }            };            RegisterRequest registerRequest = new RegisterRequest(Expect, Prize, name, Email, responseListener);            RequestQueue queue = Volley.newRequestQueue(Registeractivity.this);            queue.add(registerRequest);        }    });}

MainActivity.java

public class MainActivity extends AppCompatActivity {@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_main);    final TextVIEw registerlink = (TextVIEw) findVIEwByID(R.ID.eRegister);    registerlink.setonClickListener(new VIEw.OnClickListener() {        @OverrIDe        public voID onClick(VIEw v) {            Intent registerIntent = new Intent(MainActivity.this, Registeractivity.class);            MainActivity.this.startActivity(registerIntent);        }    });}

表现

<uses-permission androID:name="androID.permission.INTERNET"></uses-permission><application    androID:allowBackup="true"    androID:icon="@mipmap/ic_launcher"    androID:label="@string/app_name"    androID:supportsRtl="true"    androID:theme="@style/Apptheme">    <activity androID:name=".MainActivity">        <intent-filter>            <action androID:name="androID.intent.action.MAIN" />            <category androID:name="androID.intent.category.LAUNCHER" />        </intent-filter>    </activity>    <activity androID:name=".Registeractivity"></activity></application>

activity_register.xml

    <EditText    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:ID="@+ID/etUkNown"    androID:layout_alignParenttop="true"    androID:layout_alignParentleft="true"    androID:layout_alignParentStart="true"    androID:layout_margintop="60dp"    androID:layout_alignParentRight="true"    androID:layout_alignParentEnd="true"    androID:hint="Numbers" /><EditText    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:ID="@+ID/etPrize"    androID:hint="Secret CD"    androID:layout_below="@+ID/etUkNown"    androID:layout_alignParentleft="true"    androID:layout_alignParentStart="true"    androID:layout_alignRight="@+ID/etUkNown"    androID:layout_alignEnd="@+ID/etUkNown" /><EditText    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:inputType="textPersonname"    androID:ems="10"    androID:ID="@+ID/etname"    androID:hint="Full name"    androID:layout_below="@+ID/etPrize"    androID:layout_alignRight="@+ID/etPrize"    androID:layout_alignEnd="@+ID/etPrize"    androID:layout_alignParentleft="true"    androID:layout_alignParentStart="true" /><EditText    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:inputType="textEmailAddress"    androID:ems="10"    androID:ID="@+ID/etEmail"    androID:hint="New Email"    androID:layout_below="@+ID/etname"    androID:layout_alignParentleft="true"    androID:layout_alignParentStart="true"    androID:layout_alignRight="@+ID/etname"    androID:layout_alignEnd="@+ID/etname" /><button    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:text="Register"    androID:ID="@+ID/bRegister"    androID:layout_margintop="46dp"    androID:layout_below="@+ID/etEmail"    androID:layout_centerHorizontal="true" />

解决方法:

再添加一个权限ACCESS_NETWORK_STATE

<uses-permission androID:name="androID.permission.INTERNET"></uses-permission><uses-permission androID:name="androID.permission.ACCESS_NETWORK_STATE" /><application    androID:allowBackup="true"    androID:icon="@mipmap/ic_launcher"    androID:label="@string/app_name"    androID:supportsRtl="true"    androID:theme="@style/Apptheme">    <activity androID:name=".MainActivity">    <intent-filter>        <action androID:name="androID.intent.action.MAIN" />        <category androID:name="androID.intent.category.LAUNCHER" />    </intent-filter>    </activity>    <activity androID:name=".Registeractivity"></activity></application>  

总结

以上是内存溢出为你收集整理的java – 代码不起作用,按钮没有响应全部内容，希望文章能够帮你解决java – 代码不起作用,按钮没有响应所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。