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我想在我的佈局文件中以編程方式將文本添加到textview和單選按鈕。我已經調試了應用程序，並看到從光標返回正確的值，但我無法將這些值綁定到textview的。在displayquestions功能Android：無法在佈局文件中設置值Programitically
問題
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>
成果
結果是什麼？ –
獲取任何錯誤？爲什麼在初始化displayquestions（）函數中的textviews而不是onCreate（）方法 – Soham
縮小代碼以改變您的問題 – yshahak