Android 在登录页面按钮中注入活动

我正在创建一个登录页面。我创建了一个带有toast“login success”和“login fail”的登录按钮（btnlogin）。但是，我需要在“成功”后使用相同的按钮（btnlogin）启动另一个页面。如何将intent方法注入按钮，使其可以打开另一个活动

主要

短信活动

package com.example.fyp;

import com.example.fyp.R;
import android.os.Bundle;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class SMS extends Activity {
Button sendSMS;
EditText msgTxt;
EditText numTxt;
IntentFilter intentFilter;

private BroadcastReceiver intentReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent)
    {
        TextView inTxt = (TextView) findViewById(R.id.textMsg);
        inTxt.setText(intent.getExtras().getString("sms"));
    }
};
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    intentFilter = new IntentFilter();
    intentFilter.addAction("SMS_RECEIVED_ACTION");

    sendSMS = (Button)findViewById(R.id.sendBtn);
    msgTxt = (EditText)findViewById(R.id.message);
    numTxt = (EditText)findViewById(R.id.numberTxt);
    sendSMS.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            String myMsg = msgTxt.getText().toString();
            String theNumber = numTxt.getText().toString();
            sendMsg(theNumber, myMsg);

        }
    });
}

protected void sendMsg(String theNumber, String myMsg) {
    // TODO Auto-generated method stub
    String SENT = "Message Sent";
    String DELIVERED = "Message Delivered";

PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent(SENT), 0);
PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0, new Intent(DELIVERED), 0);

registerReceiver(new BroadcastReceiver()
{
    public void onReceive(Context arg0, Intent arg1)
    {
        switch(getResultCode())
        {
        case Activity.RESULT_OK:
        Toast.makeText(getBaseContext(), "SMS sent", Toast.LENGTH_LONG).show();
            break;
        case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
    Toast.makeText(getBaseContext(), "Generic Failure",   Toast.LENGTH_LONG).show();
            break;
        case SmsManager.RESULT_ERROR_NO_SERVICE:
    Toast.makeText(getBaseContext(), "No Service", Toast.LENGTH_LONG).show();
            break;      
        }
    }
}, new IntentFilter(SENT));

registerReceiver(new BroadcastReceiver()
{
    public void onReceive(Context arg0, Intent arg1)
    {
        switch(getResultCode())
        {
        case Activity.RESULT_OK:
    Toast.makeText(getBaseContext(), "SMS delivered", Toast.LENGTH_LONG).show();
            break;
        case Activity.RESULT_CANCELED:
    Toast.makeText(getBaseContext(), "SMS not delivered", Toast.LENGTH_LONG).show();
            break;  
        }
    }
}, new IntentFilter(DELIVERED));

SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(theNumber, null, myMsg, sentPI, deliveredPI);  
}

protected void onResume(){
registerReceiver(intentReceiver, intentFilter);
super.onResume();
}
protected void onPause(){
unregisterReceiver(intentReceiver);
super.onPause();    
}   
}

清单文件

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

<uses-sdk
    android:minSdkVersion="10"
    android:targetSdkVersion="18" />

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity  android:name=".SMS"
               android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <receiver android:name=".SMSReceiver" >
        <intent-filter>
            <action android:name="android.provider.Telephony.SMS_RECEIVED" />
        </intent-filter>
    </receiver>
    <activity
        android:name="com.example.fyp.Main"
        android:label="@string/title_activity_main" >
    </activity>
</application>

</manifest>

---

您的问题不太清楚，根据我的理解，您希望在用户成功登录后打开新的活动，然后您应该将代码编写为

if(receiveMessage.equals("success")){
                    Toast.makeText(getBaseContext(), "Login success!",
                            Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MainActivity.this, SMS.class);
         startActivity(intent);
}

但是请确保您的

SMS

类必须在您的

清单中注册

试试这个-

String receiveMessage = builder.toString();
if(receiveMessage.equals("success")){
Toast.makeText(getBaseContext(), "Login success!",Toast.LENGTH_SHORT).show();
startActivity(new Intent(MainActivity.this, SMS.class);
finish();
}

---

谢谢你的回答。这就是我在我的maifest文件中所写的@userVee发布您的短信活动谢谢您的回答。你能帮我找出我在日志中遇到的错误吗？”java.lang.RuntimeException:无法启动活动组件信息{com.example.fyp/com.example.fyp.SMS}:java.lang.NullPointerException'是的，我添加了名称。应用程序似乎停止工作。我刚刚发布了清单文件。请从您的SMS活动中删除此文件。在manifest.MAIN中，表示此活动是应用程序的入口点，即启动应用程序时，将创建此活动。

if(receiveMessage.equals("success")){
                    Toast.makeText(getBaseContext(), "Login success!",
                            Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MainActivity.this, SMS.class);
         startActivity(intent);
}

String receiveMessage = builder.toString();
if(receiveMessage.equals("success")){
Toast.makeText(getBaseContext(), "Login success!",Toast.LENGTH_SHORT).show();
startActivity(new Intent(MainActivity.this, SMS.class);
finish();
}