android - 未能将结果 ResultInfo{who=null, request=1, result=-1, data=Intent { (has extras) }} 传递给 Activity ； java.lang.NullPointerException异常

Question

我正在为我的 Final Year 项目创建触发器和操作应用程序，

我将子 Activity 结果返回到中间 Activity ，然后向该 Activity 添加一些数据，然后再次将其发送到主 Activity ，

我为 Trigger 子模块和 Action 子模块都做了，两者都像相同的编码....

触发模块工作正常，但是当 Action 模块运行应用程序时被强制停止

错误是

E/AndroidRuntime(5104): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { (has extras) }} to activity {mani.droid.mechanize/mani.droid.mechanize.ActionListActivity}: java.lang.NullPointerException

子 onActivityResult

public void onSave(View v)
{
    if(txtNum.length() != 0)
    {
        String strTmp = null;
        Intent resultInt = new Intent();
        strTmp = txtNum.getText().toString();
        resultInt.putExtra("Num", strTmp);
        resultInt.putExtra("SubName", strTmp);
        setResult(Activity.RESULT_OK, resultInt);
        finish();
    }
    else
        Toast.makeText(getApplicationContext(), "Please enter number or choose from contact", Toast.LENGTH_SHORT).show();
}

中级 onActivityResult

//getting result from other activity and sending to action list activity
@Override
public void onActivityResult(int reqCode, int resultCode, Intent data) {
    super.onActivityResult(reqCode, resultCode, data);
    if(resultCode == Activity.RESULT_OK)
    {
        switch(reqCode)
        {
            case 1:
                    data.putExtra("ActionName", txtAction);
                    setResult(Activity.RESULT_OK, data);
                    finish();
                    break;
        }
    }
}

主onActivityResult

//Getting Trigger parameters and adding to list
@Override
public void onActivityResult(int reqCode, int resultCode, Intent data) {
    super.onActivityResult(reqCode, resultCode, data);
    if(resultCode == Activity.RESULT_OK)
    {
        switch(reqCode)
        {
            case 1:
                if (data.equals(null))
                {
                    Toast.makeText(context, "Intent is Null", Toast.LENGTH_SHORT).show();
                }
                else
                {
                    //String actName = data.getStringExtra("ActionName");
                    String subName = data.getStringExtra("SubName");
                    Toast.makeText(context, subName, Toast.LENGTH_SHORT).show();
                }
                break;
        }
    }
} 

Answer 1

这意味着 Intent 接收器在其 onActivityResult() 中抛出了异常。我可以在此处看到 NullPointerException:data.equals(null) 绝对是错误的，因为当 data 为 时它会抛出异常空。你的意思是 data == null。