Question

我想要紧急帮助，当我点击“ffp”imagebutton时，我想去另一个活动，但每次点击它，我都会收到一个错误，我该怎么办，除了调用那个按钮，一切都还好。如果我应该使用AsynchTask那么如何？我的布局XML文件没有错误我多次检查它。，我在下面提供了我的LoginActivity和清单：

package com.aminmousavi.safetransaction;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import android.os.StrictMode;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;


public class LoginActivity extends Activity {


private static final String SOAP_ACTION = "urn:safewsdl#loginuser";
private static final String METHOD_NAME = "loginuser";
private static final String NAMESPACE = "urn:safewsdl";
private static final String URL = "http://10.0.2.2/WebServiceSOAP/webs.php";

SoapObject request;
SoapSerializationEnvelope envelope;
HttpTransportSE httpTransport;
Object response;
StrictMode.ThreadPolicy policy;

@Override
protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.login);

    if (android.os.Build.VERSION.SDK_INT > 9) {
        policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }

    Button btnLogin = (Button) findViewById(R.id.btnLogin);
    btnLogin.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                   EditText emailet = (EditText)findViewById(R.id.emailet); 
                   EditText passet = (EditText) findViewById(R.id.passet);
                   request = new SoapObject(NAMESPACE, METHOD_NAME);
                    //SoapObject 
                     request.addProperty("email", emailet.getText().toString());
               request.addProperty("password", passet.getText().toString());           
                   envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                        envelope.setOutputSoapObject(request);      
            httpTransport = new HttpTransportSE(URL);
            try
            {
                httpTransport.call(SOAP_ACTION, envelope);
                response = envelope.getResponse();
      Toast.makeText(getBaseContext(), response.toString(), Toast.LENGTH_LONG).show(); 
            }

            catch (Exception exception)
            {
      Toast.makeText(getBaseContext(), exception.toString(), Toast.LENGTH_LONG).show();

            }

        }   
    });

   TextView registerScreen = (TextView) findViewById(R.id.link_to_register);

    // Listening to register new account link
    registerScreen.setOnClickListener(new View.OnClickListener() {
          public void onClick(View v) {
               //Switching to Register screen
               Intent i = new Intent(getApplicationContext(), RegisterActivity.class);
                startActivity(i);
        }
   });

    ImageButton ffp = (ImageButton) findViewById(R.id.fingerp);
    ffp.setOnClickListener(new View.OnClickListener() { 
          public void onClick(View v) {
            try{
              startActivity(new Intent("com.aminmousavi.SecondActivity"));
            }
            catch(Exception e){
                e.printStackTrace();
                Log.d("AppErorr", e.getMessage());
        Toast.makeText(getBaseContext(), "Error", Toast.LENGTH_LONG).show();
            }
         }
     });
   }
 }



<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.aminmousavi.safetransaction"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="10"
    android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.aminmousavi.safetransaction.LoginActivity"
        android:label="Login to your Account" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <!--  Entry for RegisterActivity.class -->
    <activity android:name=".RegisterActivity"
              android:label="Register New Account">

    </activity>
    <!--  Entry for FiongerprintActivity.class -->
    <activity android:name=".SecondActivity"
              android:label="Second Activity">

    </activity>
</application>

Answer 1

尝试：

startActivity(new Intent(LoginActivity.this, SecondActivity.class));

而不是：

startActivity(new Intent("com.aminmousavi.SecondActivity"));

Answer 2

适合我：

startActivity（new Intent（LoginActivity.this， com.aminmousavi.SecondActivity.class））;

通过单击图像按钮调用另一个活动时出错

2 个答案: