Question

我正在尝试在我的布局文件中以编程方式将Text添加到textview＆radio和单选按钮。我已经调试了应用程序并看到了从光标返回的正确值，但是我无法将这些值绑定到textview上。

显示问题功能

中的问题

package com.Example.assesmenttool;


public class Aptitude extends Activity implements OnClickListener {

    DBHelper helper;
    SQLiteDatabase db;
    Button btnBegin,btnnext;
    int count = 0;

    //Sub category Buttons
    Button btnaptitude5,btnaptitude4,btnaptitude3,btnaptitude2,btnaptitude1;

    String Question_ID,Title,TitleDescription,QuestionText,QuestionTemplate,QuestionImage;

    //String SubModuleQuestion_ID;

    TextView tvTitle,tvInstructions,tvQuestionText;

    RadioGroup rgtemplate4images;
    ImageView img;
     RelativeLayout aptitudesubcateg,temp4optimage;



    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.aptitude);

          aptitudesubcateg = (RelativeLayout) findViewById(R.id.aptitudesubcateg);
          temp4optimage = (RelativeLayout) findViewById(R.id.temp4optimage);


         aptitudesubcateg.setVisibility(View.GONE);
         temp4optimage.setVisibility(View.GONE);


        btnaptitude1 = (Button)findViewById(R.id.btnaptitude1);
        btnaptitude2 = (Button)findViewById(R.id.btnaptitude2);
        btnaptitude3 = (Button)findViewById(R.id.btnaptitude3);
        btnaptitude4 = (Button)findViewById(R.id.btnaptitude4);
        btnaptitude5 = (Button)findViewById(R.id.btnaptitude5);

        btnaptitude1.setOnClickListener(this);
        btnaptitude2.setOnClickListener(this);
        btnaptitude3.setOnClickListener(this);
        btnaptitude4.setOnClickListener(this);
        btnaptitude5.setOnClickListener(this);

        helper=new DBHelper(this);
        //Resources res = getResources();
        //String[] myBooks = res.getStringArray(R.array.my_questions);



        btnBegin = (Button)findViewById(R.id.btnBeginAptitude);

        btnBegin.setOnClickListener(this);

    }

     public int getcount(String moduleID, String SubModuleID)
     {
         count = 0;
         String selectQuery = "Select * from TableQuestionMaster where Module_ID = "+moduleID+" AND SubModule_ID ="+SubModuleID;

            SQLiteDatabase db = helper.getReadableDatabase();
            Cursor cursor = db.rawQuery(selectQuery, null);
            count =  cursor.getCount();

            Toast.makeText(this, String.valueOf(count) ,Toast.LENGTH_LONG).show(); 

            cursor.close();
            db.close();

    return count; 
     }



       public void getAllQuestionsAptitude(String moduleID, String SubModuleID,String SubModuleQuestion_ID){



           SQLiteDatabase db = helper.getReadableDatabase();
           Cursor c = null;

           if (count>0)
            {

           //   SubModuleQuestion_ID = "1";
                   String selectQuestion = "Select * from TableQuestionMaster where Module_ID = "+moduleID+" AND SubModule_ID ="+SubModuleID+" AND SubModuleQuestion_ID ="+SubModuleQuestion_ID;
                      c = db.rawQuery(selectQuestion, null);
            if (c.moveToFirst()) {
                do {


                    Question_ID = c.getString(c.getColumnIndex("Question_ID")); 

                    Title = c.getString(c.getColumnIndex("Title"));


                    TitleDescription = c.getString(c.getColumnIndex("TitleDescription"));


                    QuestionText = c.getString(c.getColumnIndex("QuestionText"));


                    QuestionTemplate = c.getString(c.getColumnIndex("QuestionTemplate"));


                    QuestionImage = c.getString(c.getColumnIndex("QuestionImage"));

                    Toast.makeText(this,Question_ID+" "+Title+" "+TitleDescription+" "+QuestionText+" "+QuestionTemplate+" "+QuestionImage,Toast.LENGTH_LONG).show();



                } while (c.moveToNext());        
            }
            }
            else

            {
                 Toast.makeText(this,"NO question to display",Toast.LENGTH_LONG).show();

            }


            // closing connection
            c.close();
            db.close();

        }

       public void displayquestions()
       {
           Toast.makeText(this,"count on display Q is"+ count,Toast.LENGTH_LONG).show();
           if (count >0)
           {
               getAllQuestionsAptitude("1","1",String.valueOf(count));

                    aptitudesubcateg.setVisibility(View.GONE);      
                    temp4optimage.setVisibility(View.VISIBLE);    
                    tvTitle = (TextView)findViewById(R.id.tvTitleTemplate4optoinsImage);
                    tvInstructions = (TextView)findViewById(R.id.tvInstructionstemplate4);
                    tvQuestionText = (TextView)findViewById(R.id.tvQuestionTextTemplate4Image);

                    img = (ImageView)findViewById(R.id.imageViewtemplate4options);

                    tvTitle.setText(Title);
                    tvInstructions.setText(TitleDescription);
                    tvQuestionText.setText(QuestionText);

                    String imgName = QuestionImage; // specify here your image name fetched from db
                    String uri = "drawable/" + imgName;
                    int icon = getResources().getIdentifier(uri, "drawable", getPackageName());
                    img.setImageResource(icon);

                    //NextQuestion();
           }
           else
           {
               Toast.makeText(this,"NO question to display",Toast.LENGTH_LONG).show();
           }


       }

       public void NextQuestion()
       {
           if (count>0)
           {
           count = count - 1;
           displayquestions();
           }

       }




    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub

        if (v==btnBegin)
        {
             aptitudesubcateg.setVisibility(View.VISIBLE);
              temp4optimage.setVisibility(View.GONE);

        }       
            if (v== btnaptitude1)
            {               
                      getcount("1", "1");
                      displayquestions();          

            }

            if (v== btnaptitude2)
            {
                  getcount("1", "2");
                  displayquestions();
            //  getAllQuestionsAptitude("1","2");
            }

            if (v== btnaptitude3)
            {
                  getcount("1", "3");
                  displayquestions();

                //getAllQuestionsAptitude("1","3");
            }

            if (v== btnaptitude4)
            {
            //  getAllQuestionsAptitude("1","1");
                 getcount("1", "4");
                 displayquestions();
            }

            if (v== btnaptitude5)
            {
            //  getAllQuestionsAptitude("1","1");
                 getcount("1", "5");
                 displayquestions();
            }           


        }



    }

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/back" >

    <TextView
        android:id="@+id/tvInstructionsAptitude"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/tvQuestionTextTemplate4Image"
        android:layout_alignParentTop="true"
        android:layout_alignRight="@+id/TextView01"
        android:layout_marginTop="93dp"
        android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam nibh ex, elementum non bibendum ac, consequat a sem. Proin aliquet arcu id lacus interdum, sed fermentum neque sollicitudin. Vestibulum mauris massa, vulputate tincidunt quam vel, egestas tincidunt nisi. Ut ut nulla sagittis, aliquet lectus vitae, pretium nisi. Duis maximus, magna vitae ultricies consectetur, ex felis congue turpis, id scelerisque nisl ex at turpis. Aenean dui sapien, euismod at sem non, rhoncus molestie urna. Mauris condimentum risus felis, nec iaculis orci accumsan nec. Vivamus pharetra ultricies quam a aliquam. Praesent facilisis turpis malesuada massa interdum consequat. In hac habitasse platea dictumst. Integer efficitur nibh risus, ac mattis mi porta ut. Nam leo ex, pulvinar eu orci vel, pretium maximus velit. Pellentesque rhoncus sapien felis, in cursus eros malesuada imperdiet."
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/tvQuestionTextTemplate4Image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="53dp"
        android:layout_marginTop="40dp"
        android:text="Instructions"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/TextView01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/tvQuestionTextTemplate4Image"
        android:layout_alignBottom="@+id/tvQuestionTextTemplate4Image"
        android:layout_alignParentRight="true"
        android:layout_marginRight="36dp"
        android:text="Time : 10 Mins"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/btnBeginAptitude"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/tvInstructionsAptitude"
        android:layout_alignRight="@+id/tvInstructionsAptitude"
        android:layout_below="@+id/tvInstructionsAptitude"
        android:layout_marginTop="42dp"
        android:text="Begin" />

    <include
        android:id="@+id/aptitudesubcateg"
        android:layout_width="match_parent"
        android:layout_height="match_parent"

        layout="@layout/aptitudesubcategory" />

    <include
        android:id="@+id/temp4optimage"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        layout="@layout/template4optionsimage" />

</RelativeLayout>

结果

As u can the values are coming in toast but are unable to set them

Answer 1

您可以通过在oncreate()方法而不是displayquestions()中添加以下内容来尝试一次吗？

            tvTitle = (TextView)findViewById(R.id.tvTitleTemplate4optoinsImage);
            tvInstructions = (TextView)findViewById(R.id.tvInstructionstemplate4);
            tvQuestionText = (TextView)findViewById(R.id.tvQuestionTextTemplate4Image);

            img = (ImageView)findViewById(R.id.imageViewtemplate4options);

Answer 2

如果您的cursor只返回一行（我想通过查看您的query确实会这样做），您不需要循环，请写入正在初始化strings的循环，但它们被新值覆盖。

Android：无法以编程方式在布局文件中设置值

2 个答案: