Java 无法转到下一页
我想转到下一页(主要活动)。我能够注册并将这些信息发送到数据库。但是只有成功消息和ok按钮出现。错误不会出现。请检查我的密码 LogingActivity.javaJava 无法转到下一页,java,android,Java,Android,我想转到下一页(主要活动)。我能够注册并将这些信息发送到数据库。但是只有成功消息和ok按钮出现。错误不会出现。请检查我的密码 LogingActivity.java package com.life.registeration; import android.content.Intent; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import andro
package com.life.registeration;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.toolbox.Volley;
import org.json.JSONObject;
public class LoginActivity extends AppCompatActivity {
private AlertDialog dialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
TextView registerButton = (TextView) findViewById(R.id.registerButton);
registerButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
Intent registerIntent = new Intent(LoginActivity.this, RegisterActivity.class);
LoginActivity.this.startActivity(registerIntent);
}
});
final EditText idText = (EditText) findViewById(R.id.idText);
final EditText passwordText = (EditText) findViewById(R.id.passwordText);
final Button loginButton = (Button) findViewById(R.id.loginButton);
loginButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
String userID = idText.getText().toString();
String userPassword = passwordText.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){
AlertDialog.Builder builder = new AlertDialog.Builder(LoginActivity.this);
dialog = builder.setMessage("Login success.")
.setPositiveButton("ok", null)
.create();
dialog.show();
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
LoginActivity.this.startActivity(intent);
finish();
}
else{
AlertDialog.Builder builder = new AlertDialog.Builder(LoginActivity.this);
dialog = builder.setMessage("please, check your id.")
.setNegativeButton("re try", null)
.create();
dialog.show();
}
}
catch (Exception e) {
e.printStackTrace();
}
}
};
LoginRequest loginRequest = new LoginRequest(userID, userPassword, responseListener);
RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
queue.add(loginRequest);
}
});
}
@Override
protected void onStop(){
super.onStop();
if(dialog != null){
dialog.dismiss();
dialog = null;
}
}
}
package com.life.registration;
导入android.content.Intent;
导入android.support.v7.app.AlertDialog;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.view.view;
导入android.widget.Button;
导入android.widget.EditText;
导入android.widget.TextView;
导入com.android.volley.RequestQueue;
导入com.android.volley.Response;
导入com.android.volley.toolbox.volley;
导入org.json.JSONObject;
公共类LoginActivity扩展了AppCompatActivity{
私人警报对话框;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u登录);
TextView注册表按钮=(TextView)findViewById(R.id.registerButton);
registerButton.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
Intent registerIntent=newintent(LoginActivity.this、RegisterActivity.class);
LoginActivity.this.startActivity(注册内容);
}
});
最终EditText idText=(EditText)findViewById(R.id.idText);
最终EditText passwordText=(EditText)findViewById(R.id.passwordText);
最终按钮loginButton=(按钮)findViewById(R.id.loginButton);
loginButton.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
字符串userID=idText.getText().toString();
字符串userPassword=passwordText.getText().toString();
Response.Listener responseListener=新的Response.Listener(){
@凌驾
公共void onResponse(字符串响应){
试一试{
JSONObject jsonResponse=新的JSONObject(响应);
boolean success=jsonResponse.getBoolean(“success”);
如果(成功){
AlertDialog.Builder=新建AlertDialog.Builder(LoginActivity.this);
dialog=builder.setMessage(“登录成功”)
.setPositiveButton(“确定”,空)
.create();
dialog.show();
意向意向=新意向(LoginActivity.this、MainActivity.class);
后勤活动。这。开始行动(意图);
完成();
}
否则{
AlertDialog.Builder=新建AlertDialog.Builder(LoginActivity.this);
dialog=builder.setMessage(“请检查您的id”)
.setNegativeButton(“重试”,null)
.create();
dialog.show();
}
}
捕获(例外e){
e、 printStackTrace();
}
}
};
LoginRequest LoginRequest=新的LoginRequest(用户ID、用户密码、响应侦听器);
RequestQueue=Volley.newRequestQueue(LoginActivity.this);
添加(loginRequest);
}
});
}
@凌驾
受保护的void onStop(){
super.onStop();
如果(对话框!=null){
dialog.dismise();
dialog=null;
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.life.registeration">
<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.NoActionBar">
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".RegisterActivity" /><!-- ATTENTION: This was auto-generated to add Google Play services to your project for
App Indexing. See https://g.co/AppIndexing/AndroidStudio for more information. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>
在Manifest.xml
上添加您的活动的答案如下:
<activity android:name=".MainActivity" />
您尚未在AndroidManifest.xml
文件中注册您的MainActivity
。在清单文件中添加行
。所以它应该看起来像:
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="com.life.registeration">
<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.NoActionBar">
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".RegisterActivity" />
<activity android:name=".MainActivity" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>
那么问题到底出在哪里?单击“登录”按钮或“注册”按钮>@OBX登录成功后,将显示“成功”,而不会转到下一页。注册按钮如何?单击下一个活动时是否能够启动它?替换LoginActivity.this.startActivity(intent)代码>至起始触觉(意图)代码>@OBX寄存器按钮没有问题。注册按钮工作正常,我也加入了,id和pw在db中。我不认为这是问题所在。单击“确定”后,下面的dialog.show()
行将被执行。@PrerakSola,我同意,但我指出了对话框的确切用途。是的,我得到了这个角度。很乐意帮助……:)@PrerakSola,感谢您指出Manifest.xml
错误,这是一项综合工作:P
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="com.life.registeration">
<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.NoActionBar">
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".RegisterActivity" />
<activity android:name=".MainActivity" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>