Question

我想将值从一个活动发送到另一个活动，但我得到了空指针例外请解决我的问题。第一项活动包含短信的细节 sms根据这些值发送到第二个活动，第二个活动搜索联系人不发送回复短信。

public void onReceive( Context context, Intent intent ) 
    {
        // Get SMS map from Intent
        Bundle bundle = null;
        Bundle extras = intent.getExtras();

        String messages = "";
        String address = null,body=null;

        if ( extras != null )
        {
            // Get received SMS array
            Object[] smsExtra = (Object[]) extras.get( "pdus" );

            // Get ContentResolver object for pushing encrypted SMS to incoming folder
            //ContentResolver contentResolver = context.getContentResolver();

            for ( int i = 0; i < smsExtra.length; ++i )
            {
                SmsMessage sms = SmsMessage.createFromPdu((byte[])smsExtra[i]);

                body = sms.getMessageBody().toString();
               address = sms.getOriginatingAddress();

                messages += "SMS from " + address + " :\n";                    
                messages += body + "\n";

                // Here you can add any your code to work with incoming SMS
                // I added encrypting of all received SMS 


            }

            // Display SMS message
            Toast.makeText( context, messages, Toast.LENGTH_SHORT ).show();
            Intent i=new Intent(context,AlertActivity.class);

           bundle.putString("from",address);
            bundle.putString("msg",body);
            i.putExtras(bundle);

            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i);

        }

}

活性2：

  Intent i=getIntent();
    Bundle bundle=i.getExtras();
    String fromAdd=bundle.getString("from");
    String msgBody=bundle.getString("body");

Answer 1

更改此

String msgBody=bundle.getString("body");

到

String msgBody=bundle.getString("msg");

Answer 2

试试这个：

@Override  
 public void onCreate(Bundle savedInstanceState) {  
 super.onCreate(savedInstanceState);  
 setContentView(R.layout.main);    
 Bundle bundle = this.getIntent().getExtras();   
if (bundle != null)
{       
 String fromAdd = bundle.getString("from");  
 String msgBody = bundle.getString("body");   
}         
}

Answer 3

在Android Bundle中我们放置了键值对，并且必须传递相同的键，同时从bundle中获取数据，这是您放置数据的。检查你的代码，你在意图上放了两个字符串，它们是： “from”和“msg” 并且您通过密钥从意图中获取值： “来自”和“身体”

所以在启动活动或活动2中更改它，以便键值匹配。

Answer 4

试试这个......

Activity1.java

Intent intent = new Intent(getApplication(),Activity2.class);
intent.putExtra("from",from);
intent.putExtra("Body",Body);
StartActivity(intent);

Activity2.java

Intent intent = getintent();
Bundle bundle=intent.getExtras();
String Body=bundle.getString("Body");
String From=bundle.getString("From");
setResult("RESULT_OK",intent);

Answer 5

尝试这种方式..

Bundle bu = getIntent（）。getExtras（）;

String title = bu.get（“from”）。toString（）;

String msg = bu.get（“body”）。toString（）;

Answer 6

试试这个.....将值从Activity1传递给Activity2。

    Intent myIntent = new Intent(Activity1.this, Activity2.class);
           myIntent.putExtra("UserId",UserId);
           myIntent.putExtra("UserName",UserName);
           myIntent.putExtra("CompanyID",CompanyID);
           myIntent.putExtra("CompanyName",CompanyName);
           myIntent.putExtra("ProjectId",ProjectId);
           startActivity(myIntent);

还可以提取您可以使用的值

    Intent intent = getIntent();
    UserId=intent.getStringExtra("UserId");
    UserName=intent.getStringExtra("UserName");
    CompanyID=intent.getStringExtra("CompanyID");
    CompanyName=intent.getStringExtra("CompanyName");

将值从一个活动传递到另一个活动

6 个答案: