AlertDialog秀=新AlertDialog.Builder(这)是未定义 [英] AlertDialog show = new AlertDialog.Builder(this) is Undefined

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问题描述

该应用程序拦截短信,并显示一个对话框的消息。

但我不能让我的测试类解决了我的对话框错误。我在做什么错了?

(我也包括我的其他2个文件)。

在Eclipse中所示

错误: AlertDialog.Builder(测试)未定义


test.java

 包com.example.firstapp;进口android.app.AlertDialog;
进口android.content.BroadcastReceiver;
进口android.content.Context;
进口android.content.Intent;
进口android.os.Bundle;
进口android.telephony.SmsMessage;公共类测试扩展广播接收器
{
    @覆盖
    公共无效的onReceive(上下文的背景下,意图意图)
    {
        // ---获得通过SMS消息---
        捆绑包= intent.getExtras();
        SmsMessage []封邮件= NULL;
        字符串str =;
        如果(捆绑!= NULL)
        {
            // ---检索收到的短信---
            [对象]的PDU =(对象[])bundle.get(的PDU);
            封邮件=新SmsMessage [pdus.length]
            的for(int i = 0; I< msgs.length;我++){
                封邮件[I] = SmsMessage.createFromPdu((字节[])的PDU [I]);
                STR + =短信来自+封邮件[I] .getOriginatingAddress();
                STR + =;
                STR + =封邮件[I] .getMessageBody()的toString()。
                STR + =\\ n;
            }            AlertDialog秀=新AlertDialog.Builder(本)
            .setTitle(信息)
            .setMessage(STR)
            .setNeutralButton(OK,NULL)
            。显示();
    }
}

}


的Andr​​oidManifest.xml

 <清单的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
    包=com.example.firstapp
    安卓版code =1
    机器人:=的versionName1.0>    <用途-SDK
        安卓的minSdkVersion =9
        机器人:targetSdkVersion =15/>
    <使用许可权的android:NAME =android.permission.SEND_SMS>
    < /使用许可权>
    <使用许可权的android:NAME =android.permission.RECEIVE_SMS>
    < /使用许可权>
    <应用
        机器人:图标=@绘制/ ic_launcher
        机器人:标签=@字符串/ APP_NAME
        机器人:主题=@风格/ AppTheme>
        <活动
            机器人:你好NAME =
            机器人:标签=@字符串/ title_activity_hello>
            &所述;意图滤光器>
                <作用机器人:名字=android.intent.action.MAIN/>                <类机器人:名字=android.intent.category.LAUNCHER/>
            &所述; /意图滤光器>
        < /活性GT;
        <接收机器人:测试NAME =>
            &所述;意图滤光器>
                <作用机器人:名字=
                    android.provider.Telephony.SMS_RECEIVED/>
            &所述; /意图滤光器>
        < /接收器>
    < /用途>< /清单>


hello.java

 包com.example.firstapp;进口android.app.Activity;
进口android.os.Bundle;
进口android.view.Menu;公共类您好延伸活动{    @覆盖
    公共无效的onCreate(捆绑savedInstanceState){
         super.onCreate(savedInstanceState);
         的setContentView(R.layout.activity_hello);
    }    @覆盖
    公共布尔onCreateOptionsMenu(菜单菜单){
        。getMenuInflater()膨胀(R.menu.activity_hello,菜单);
        返回true;
    }
}


解决方案

做到这一点:

  AlertDialog.Builder建设者=新AlertDialog.Builder(背景);
builder.setTitle(信息)
    .setMessage(STR)
    .setNeutralButton(OK,NULL);AlertDialog对话框= builder.create();
dialog.show();

而不是:

  AlertDialog秀=新AlertDialog.Builder(本)
    .setTitle(信息)
    .setMessage(STR)
    .setNeutralButton(OK,NULL)
    。显示();

您必须 AlertDialog.Builder 首先创建一个实例。然后,你可以建立对话框 builder.create()。然后你就可以显示对话框 .show()

The app intercepts sms messages and displays a Dialog of the message.

However I am unable to get my Dialog error resolved in my Test class. What am I doing wrong?

(I've also included my other 2 files).

ERROR shown in Eclipse: AlertDialog.Builder(Test) is undefined


test.java

package com.example.firstapp;

import android.app.AlertDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;

public class Test extends BroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent) 
    {
        //---get the SMS message passed in---
        Bundle bundle = intent.getExtras();        
        SmsMessage[] msgs = null;
        String str = "";            
        if (bundle != null)
        {
            //---retrieve the SMS message received---
            Object[] pdus = (Object[]) bundle.get("pdus");
            msgs = new SmsMessage[pdus.length];            
            for (int i=0; i<msgs.length; i++){
                msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);                
                str += "SMS from " + msgs[i].getOriginatingAddress();                     
                str += " :";
                str += msgs[i].getMessageBody().toString();
                str += "\n";                  
            }

            AlertDialog show = new AlertDialog.Builder(this)
            .setTitle("Message")
            .setMessage(str)
            .setNeutralButton("OK", null)
            .show();
    }                         
}

}


AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.firstapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="9"
        android:targetSdkVersion="15" />
    <uses-permission android:name="android.permission.SEND_SMS">
    </uses-permission>
    <uses-permission android:name="android.permission.RECEIVE_SMS">
    </uses-permission>
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".Hello"
            android:label="@string/title_activity_hello" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".test"> 
            <intent-filter> 
                <action android:name=
                    "android.provider.Telephony.SMS_RECEIVED" /> 
            </intent-filter> 
        </receiver>
    </application>

</manifest>


hello.java

package com.example.firstapp;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;

public class Hello extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_hello);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_hello, menu);
        return true;
    }  
}

解决方案

Do this:

AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Message")
    .setMessage(str)
    .setNeutralButton("OK", null);

AlertDialog dialog = builder.create();
dialog.show();

Instead of:

AlertDialog show = new AlertDialog.Builder(this)
    .setTitle("Message")
    .setMessage(str)
    .setNeutralButton("OK", null)
    .show();

You have to create an instance of an AlertDialog.Builder first. Then you can build the Dialog with builder.create(). Then you can show the Dialog with .show().

这篇关于AlertDialog秀=新AlertDialog.Builder(这)是未定义的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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