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我想将我通过短信收到的按摩文本设置到我主要活动的文本视图中。我努力了很久，我在互联网上到处搜索，但它不起作用。请帮我

如何在其他活动的 TextView 中设置文本？我试过这样做，但它不起作用

我认为方法“TextView textViewAlarmMassage = (TextView) findViewById(R.id.textViewAlarmMassage);” 在 mainActivity 中不起作用，因为 programkm 停在这一行

主要活动

public class MainActivity extends Activity {

//这是另一个代码

public void showAlarmMassage(){

    //Connect to SMSReceiver Class
    *SMSReceiver receiver = new SMSReceiver();*

    //Get the Alarm Massage
    *String massage = receiver.getAlarmMassage().toString();*

    //Initialize the TextView
    *TextView textViewAlarmMassage = (TextView) findViewById(R.id.textViewAlarmMassage);*

    //Set the Alarm Massage in the TextView
    *textViewAlarmMassage.setText(massage);*
}

}

公共类 SMSReceiver 扩展 BroadcastReceiver{

public String alarmMassage; 
public String senderAddress;


@Override
public void onReceive(Context cxt, Intent intent){

    if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED"))
    {
        Bundle bundle = intent.getExtras();
        Object messages[] = (Object[]) bundle.get("pdus");
        SmsMessage smsMessage[] = new SmsMessage[messages.length];

        for (int n = 0; n < messages.length; n++)
            smsMessage[n] = SmsMessage.createFromPdu((byte[]) messages[n]);

        alarmMassage = smsMessage[0].getDisplayMessageBody();
        senderAddress = smsMessage[0].getDisplayOriginatingAddress();

        //Set the AlarmMassage in the Setter Constructor
        *setAlarmMassage(alarmMassage);*            

        *MainActivity mainActivity = new MainActivity();*

        //Here I want to start the showAlarmMassage methode in the MainActivity
        *mainActivity.showAlarmMassage();*

        String toast = "Received SMS from: " + senderAddress;
        toast += "\nMessage: " + alarmMassage;

        Toast.makeText(cxt, toast, Toast.LENGTH_LONG).show();


    }
}

//Getting AlarmMassage
*public String getAlarmMassage(){*
    return this.alarmMassage;       
}

//setting AlarmMassage
*public void setAlarmMassage(String alarmMassage){*
    this.alarmMassage = alarmMassage;
}

}

显现

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

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" > </uses-permission>
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/title_activity_startseite" >

        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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


    </intent-filter>


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

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

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

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

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

    <receiver android:name=".StatusReceiver">...</receiver>
<receiver android:name=".SMSReceiver">
    <intent-filter>
        <action android:name="android.provider.Telephony.SMS_RECEIVED" />
    </intent-filter>
</receiver>


</application>

日志

01-03 17:04:30.598: E/AndroidRuntime(22422): 致命异常: main 01-03 17:04:30.598: E/AndroidRuntime(22422): java.lang.RuntimeException: 无法在.ffnt 启动接收器。 datenbank.SMSReceiver: java.lang.NullPointerException 01-03 17:04:30.598: E/AndroidRuntime(22422): 在 android.app.ActivityThread.handleReceiver(ActivityThread.java:2287) 01-03 17:04:30.598: E /AndroidRuntime(22422): 在 android.app.ActivityThread.access$1600(ActivityThread.java:140) 01-03 17:04:30.598: E/AndroidRuntime(22422): 在 android.app.ActivityThread$H.handleMessage(ActivityThread .java:1313) 01-03 17:04:30.598: E/AndroidRuntime(22422): 在 android.os.Handler.dispatchMessage(Handler.java:99) 01-03 17:04:30.598: E/AndroidRuntime(22422 ): 在 android.os.Looper.loop(Looper.java:137) 01-03 17:04:30.598: E/AndroidRuntime(22422): 在 android.app.ActivityThread。main(ActivityThread.java:4921) 01-03 17:04:30.598: E/AndroidRuntime(22422): at java.lang.reflect.Method.invokeNative(Native Method) 01-03 17:04:30.598: E/AndroidRuntime (22422): 在 java.lang.reflect.Method.invoke(Method.java:511) 01-03 17:04:30.598: E/AndroidRuntime(22422): 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller。运行（ZygoteInit.java:1038）01-03 17:04:30.598：E/AndroidRuntime（22422）：在 com.android.internal.os.ZygoteInit.main（ZygoteInit.java:805）01-03 17:04： 30.598: E/AndroidRuntime(22422): at dalvik.system.NativeStart.main(Native Method) 01-03 17:04:30.598: E/AndroidRuntime(22422): 由: java.lang.NullPointerException 01-03 17: 04:30.598: E/AndroidRuntime(22422): at.ffnt.datenbank.MainActivity.showAlarmMassage(MainActivity.java:248) 01-03 17:04:30.598: E/AndroidRuntime(22422): at.ffnt.datenbank .SMSReceiver.onReceive(SMSReceiver.java:37) 01-03 17:04:30.598: E/AndroidRuntime(22422): 在 android.app.ActivityThread.handleReceiver(ActivityThread.java:2280) 01-03 17:04:30.598: E/AndroidRuntime(22422): ... 10 更多

4

1 回答 1

0

广播接收器

public class SMSReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context cxt, Intent intent)
 {
  if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED"))
   {
     Bundle b=intent.getExtras();
     Intent i=new Intent(getApplicationContext(),GetSMSActivity.class);
     i.putExtra("SMS_BUNDLE",b);
     startActivity(i);
     
   }
  }
 }

清单文件

 <uses-permission android:name="android.permission.RECEIVE_SMS" />
 <activity
    android:name=".GetSMSActivity"
    android:label="@string/title_activity_startseite" >
  <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>

你的 MainActivity

GetSMSActivity.java


TextView textViewAlarmMassage = (TextView) findViewById(R.id.textViewAlarmMassage);
Intent smsReceived=getIntent();
Bundle smsData=smsReceived.getExtras("SMS_BUNDLE");
Object messages[] = (Object[])smsData.get("pdus");
SmsMessage smsMessage[]=new SmsMessage[messages.length];
    
for (int n = 0; n < messages.length; n++)
     {
        smsMessage[n] = SmsMessage.createFromPdu((byte[]) messages[n]);
      }
String alarmMassage = smsMessage[0].getDisplayMessageBody();
String senderAddress = smsMessage[0].getDisplayOriginatingAddress();

textViewAlarmMassage.setText(alarmMassage);

在测试时使用 eclipse 模拟消息。

于 2013-01-03T17:49:56.307 回答