收到短信时不显示 AlertDialog答案

【问题标题】：AlertDialog not be shown when receiving sms收到短信时不显示 AlertDialog
【发布时间】：2014-05-26 14:41:12
【问题描述】：

我在一个应用程序上工作，它发送一条短信并将收到的短信显示为AlertDialog，但在接收短信时不显示 AlertDialog 这是我项目的代码：

主活动：

package com.am7.masirinfo;

public class MainActivity extends Activity {



TextView tv;
SharedPreferences prefs;
Button sendBtn;   
EditText txtphoneNo;   
EditText txtMessage;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ImageButton btn2 = (ImageButton) findViewById(R.id.btn2);
    btn2.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            finish();
            System.exit(0);

        }
    });




    ActionBar bar = getActionBar();
    bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#8A0441")));
    bar.show();
    bar.setIcon(R.drawable.bar);
    bar.setDisplayShowTitleEnabled(false);
    bar.setDisplayUseLogoEnabled(true);
    bar.setDisplayHomeAsUpEnabled(false);







    TextView tx = (TextView)findViewById(R.id.textView1);
    Typeface custom_font = Typeface.createFromAsset(getAssets(), "fonts/font.ttf");
    tx.setTypeface(custom_font);

    TextView tx1 = (TextView)findViewById(R.id.textView2);

    Typeface custom_font1 = Typeface.createFromAsset(getAssets(), "fonts/gmail.ttf");
    tx1.setTypeface(custom_font1);
    TextView tx2 = (TextView)findViewById(R.id.textViewMessage);
    tx2.setTypeface(custom_font);
    TextView tx3 = (TextView)findViewById(R.id.textView3);
    TextView tx4 = (TextView)findViewById(R.id.textView4);





     sendBtn = (Button) findViewById(R.id.btnSendSMS);      
     txtphoneNo = (EditText) findViewById(R.id.editTextPhoneNo);      
     txtMessage = (EditText) findViewById(R.id.editTextSMS);
      sendBtn.setOnClickListener(new View.OnClickListener() {         
          public void onClick(View view) {            
              sendSMSMessage();         
              }      
          });
   }   protected void sendSMSMessage() {      
       Log.i("Send SMS", "");
          String phoneNo = txtphoneNo.getText().toString();      
      String message = txtMessage.getText().toString();
      try {         SmsManager smsManager =
SmsManager.getDefault();         
      smsManager.sendTextMessage(phoneNo, null, message, null, null);         
      AlertDialog ad1 = new AlertDialog.Builder(this).create(); 
        ad1.setCancelable(false); 
        // This blocks the 'BACK' button 
        ad1.setMessage("با موفقیت ارسال شد");
        ad1.setTitle("انجام شد");
        ad1.setButton("باش", new DialogInterface.OnClickListener() {    
            @Override    
            public void onClick(DialogInterface dialog, int which) {        
                dialog.dismiss();                        
                } 
            }); 
        ad1.show();
        ad1.setCanceledOnTouchOutside(true);    
      } 
      catch (Exception e) {   
          AlertDialog ad = new AlertDialog.Builder(this).create(); 
        ad.setCancelable(false); 
        // This blocks the 'BACK' button 
        ad.setMessage("متاسفانه ارسال نشد مجددا تلاش کنید.");
        ad.setTitle("خطایی رخ داد!");
        ad.setButton("خب", new DialogInterface.OnClickListener() {    
            @Override    
            public void onClick(DialogInterface dialog, int which) {        
                dialog.dismiss();                        
                } 
            }); 
        ad.show();
        ad.setCanceledOnTouchOutside(true);      
          e.printStackTrace();



      }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

        }

这是 SmsReceiver.java ：

public class SmsReceiver extends BroadcastReceiver {        
// Get the object of SmsManager
    final SmsManager sms = SmsManager.getDefault();

    public void onReceive(Context context, Intent intent) {

        // Retrieves a map of extended data from the intent.
        final Bundle bundle = intent.getExtras();

        try {

            if 
            (bundle != null) {

                final Object[] pdusObj = (Object[]) bundle.get("pdus");

                for (int i = 0; i < pdusObj.length; i++) {

                    SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
                    String phoneNumber = currentMessage.getDisplayOriginatingAddress();
                    String message = currentMessage.getDisplayMessageBody();
                    Log.i("SmsReceiver", "senderNum: " + phoneNumber + "; message: " + message);
                    if 
                    (TextUtils.equals(currentMessage.getDisplayOriginatingAddress(), "+981000141")) {                    
                     AlertDialog.Builder builder = new AlertDialog.Builder(context);
                     builder.setTitle("اطلاعات ریافت شد!");
                     builder.setMessage(message);
                     builder.setPositiveButton("HEY!", new DialogInterface.OnClickListener() 
                     {

                        @Override
                        public void onClick(DialogInterface dialog, int id) {
                            // TODO Auto-generated method stub

                        }
                    });
                     builder.show();
                        }



                } // end for loop
              } // bundle is null

        } catch (Exception e) {
            Log.e("SmsReceiver", "Exception smsReceiver" +e);

        }
    }

    private CharSequence contains(String string) {
        // TODO Auto-generated method stub
        return null;
    }



}

主布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/bg"
android:orientation="vertical" >



<TextView
    android:id="@+id/textViewMessage"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/sms_label" />

<EditText
    android:id="@+id/editTextSMS"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="����: 0711 0511 ���� ����� �� ����"
    android:inputType="textMultiLine" >

    <requestFocus />
</EditText>

<Button
    android:id="@+id/btnSendSMS"
    android:layout_width="fill_parent"
    android:layout_height="41dp"
    android:background="@drawable/abstract_877"
    android:text="@string/send_sms_label" />

<EditText
    android:id="@+id/editTextPhoneNo"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:enabled="false"
    android:inputType="phone"
    android:text="+981000141"
    android:visibility="invisible" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="����� �� ���� ��� ���� � Ӂ� �� �� � ����� �� ��� ���� �� ���� ������."
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:textColor="#000000"
    android:textColorHint="#00BD39" />
<TextView
    android:id="@+id/textView2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="bottom|center"
    android:text="AM7group@gmail.com" />

<TextView
    android:id="@+id/textView3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="www.iran141.ir"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<TextView
    android:id="@+id/textView4"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="+981000141"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<ImageButton
    android:id="@+id/btn2"
    android:layout_width="match_parent"
    android:layout_height="339dp"
    android:background="@android:color/transparent"
    android:src="@drawable/exitbtn" />

Logcat：

05-26 20:16:53.509: I/SmsReceiver(31910): senderNum: +981000141; message: عجبا
05-26 20:16:53.529: I/SmsReceiver(31356): senderNum: +981000141; message: عجبا
05-26 20:16:53.639: E/SmsReceiver(31356): Exception  smsReceiverandroid.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

在与@faizal 交谈后，我更改了主要活动，但在 MainActivity 中出现了 2 个错误：

public class MainActivity extends Activity {



TextView tv;
SharedPreferences prefs;
Button sendBtn;   
EditText txtphoneNo;   
EditText txtMessage;
SmsReceiver BR_smsreceiver = null;








@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    BR_smsreceiver = new SmsReceiver();
    BR_smsreceiver.setActivityHandler(this);
    IntentFilter fltr_smsreceived = new IntentFilter("android.provider.Telephony.SMS_RECEIVED");
    registerReceiver(BR_smsreceiver, fltr_smsreceived);

    ImageButton btn2 = (ImageButton) findViewById(R.id.btn2);
    btn2.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            finish();
            System.exit(0);

        }
    });




    ActionBar bar = getActionBar();
    bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#8A0441")));
    bar.show();
    bar.setIcon(R.drawable.bar);
    bar.setDisplayShowTitleEnabled(false);
    bar.setDisplayUseLogoEnabled(true);
    bar.setDisplayHomeAsUpEnabled(false);


    public void showAlert(string message){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);                 
        builder.setTitle(" !");                 
        builder.setMessage(message);
        builder.setPositiveButton("HEY!", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int id) {
                // TODO Auto-generated method stub

            }
        });
        builder.show();
    }







    TextView tx = (TextView)findViewById(R.id.textView1);
    Typeface custom_font = Typeface.createFromAsset(getAssets(), "fonts/font.ttf");
    tx.setTypeface(custom_font);

    TextView tx1 = (TextView)findViewById(R.id.textView2);

    Typeface custom_font1 = Typeface.createFromAsset(getAssets(), "fonts/gmail.ttf");
    tx1.setTypeface(custom_font1);
    TextView tx2 = (TextView)findViewById(R.id.textViewMessage);
    tx2.setTypeface(custom_font);
    TextView tx3 = (TextView)findViewById(R.id.textView3);
    TextView tx4 = (TextView)findViewById(R.id.textView4);





     sendBtn = (Button) findViewById(R.id.btnSendSMS);      
     txtphoneNo = (EditText) findViewById(R.id.editTextPhoneNo);      
     txtMessage = (EditText) findViewById(R.id.editTextSMS);
      sendBtn.setOnClickListener(new View.OnClickListener() {         
          public void onClick(View view) {            
              sendSMSMessage();         
              }      
          });
   }   protected void sendSMSMessage() {      
       Log.i("Send SMS", "");
          String phoneNo = txtphoneNo.getText().toString();      
      String message = txtMessage.getText().toString();
      try {         SmsManager smsManager =
SmsManager.getDefault();         
      smsManager.sendTextMessage(phoneNo, null, message, null, null);         
      AlertDialog ad1 = new AlertDialog.Builder(this).create(); 
        ad1.setCancelable(false); 
        // This blocks the 'BACK' button 
        ad1.setMessage("�� ������ ����� ��");
        ad1.setTitle("����� ��");
        ad1.setButton("���", new DialogInterface.OnClickListener() {    
            @Override    
            public void onClick(DialogInterface dialog, int which) {        
                dialog.dismiss();                        
                } 
            }); 
        ad1.show();
        ad1.setCanceledOnTouchOutside(true);    
      } 
      catch (Exception e) {   
          AlertDialog ad = new AlertDialog.Builder(this).create(); 
        ad.setCancelable(false); 
        // This blocks the 'BACK' button 
        ad.setMessage("�������� ����� ��� ����� ���� ����.");
        ad.setTitle("����� �� ���!");
        ad.setButton("��", new DialogInterface.OnClickListener() {    
            @Override    
            public void onClick(DialogInterface dialog, int which) {        
                dialog.dismiss();                        
                } 
            }); 
        ad.show();
        ad.setCanceledOnTouchOutside(true);      
          e.printStackTrace();



      }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

错误在公共 void 方法中。 SmsReceiver 中有两次错误，但这个问题是针对这个问题的！你在这里@faizal

提前致谢

【问题讨论】：

你也可以发布布局文件吗？
你在manifest中注册了receiver吗？
@faizal 为您编辑！
@user184994 是的，我注册了！
@user184994 亲爱的我有 3 个活动：1-splashScreen 2-MainActivity 3-SmsReceiver 我在第一个活动（SplashScreen）下注册了它，你能帮帮我吗？

标签： java android android-alertdialog

【解决方案1】：

问题在于，提供给 BroadcastReceiver 的 onReceive 方法的上下文是应用程序上下文（与活动上下文相反），显然不能用于显示对话框。因此，您需要在正在运行的 Activity 中而不是在广播接收器中显示对话框。

在你的 SmsReceiver 类中，创建一个函数来接收主要的活动类对象：

MainActivity act = null;
void setActivityHandler(MainActivity act)
{
this.act=act;
}

在主活动中注册广播接收器（而不是在初始屏幕中）并调用 setActivityHandler()。因此，您的主要活动中将包含以下几行：

SmsReceiver BR_smsreceiver = null;

onCreate(Bundle savedInstance){
....
BR_smsreceiver = new SmsReceiver();
BR_smsreceiver.setActivityHandler(this);
IntentFilter fltr_smsreceived = new     
IntentFilter("android.provider.Telephony.SMS_RECEIVED");
registerReceiver(BR_smsreceiver, fltr_smsreceived);
....
}

在您的 SmsReceiver 类中，删除所有 AlertDialog 构建器行并将其替换为
```
act.showAlert(message);
```

在您的主要活动类中，创建 showAlert() ：

public void showAlert(String message){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
                 builder.setTitle("اطلاعات ریافت شد!");
                 builder.setMessage(message);
                 builder.setPositiveButton("HEY!", new DialogInterface.OnClickListener() 
                 {

                    @Override
                    public void onClick(DialogInterface dialog, int id) {
                        // TODO Auto-generated method stub

                    }
                });
                 builder.show();
}

【讨论】：

哦，非常感谢我的兄弟 faizal
先生。我做。对不起，我在 java 文件中看到了 2 个错误！如何解决？ 1-in mainActivity: public void showAlert (string... Error: void is an invalid type for the variable showAlert then 2-smsReceiver.java : act.showAlert(message... 方法 showAlert(string) 未定义该类型MainActivity 你能帮我吗？
在 Dropbox 等地方公开上传您的 mainActivity 类并分享链接。我去看看。
Excuse me different by if copy the text of MainActivity and put this in this place?
在 cmets 中粘贴代码真的很麻烦，因为所有格式都丢失了。 cmets 也有字符限制。也许您可以在问题中添加一个编辑部分并将其粘贴到那里。