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ViewPager를 작동 시키려고하지만 코드의 한 섹션에서 문제가 발생합니다. 문제가되는 코드 섹션은 바로 아래에 게시됩니다. 내 생각에, 내 TextViews는 반복적으로 위치가 배열의 크기 인 getCount() 메서드에 설정된 값으로 반복되고 있으므로 업데이트되고 있습니다.ViewPager 및 TextView 업데이트. 치명적인 예외입니까?
어쨌든,이 모든 것의 아래에 지금까지 가지고있는대로 내 코드가 꽉 찼습니다. 여기
// Capture position and set to the TextViews
tvNumber.setText(arrayAtomicNum.get(position));
tvSymbol.setText(arraySymbol.get(position));
tvName.setText(arrayName.get(position));
tvGroup.setText(arrayGroup.get(position));
tvPeriod.setText(arrayPeriod.get(position));
tvBlock.setText(arrayBlock.get(position));
tvFamily.setText(arrayFamily.get(position));
tvColor.setText(arrayColor.get(position));
tvPhase.setText(arrayPhase.get(position));
tvNeutrons.setText(arrayNeutrons.get(position));
tvProtons.setText(arrayProtons.get(position));
tvElectrons.setText(arrayElectrons.get(position));
ViewPagerAdapter.java
에서문제있는 코드는 내가
public class LearnActivity extends Activity {
public static String TAG = LearnActivity.class.getSimpleName();
ViewPager viewPager;
PagerAdapter adapter;
private int atomicNum = 0;
private int temp1;
private int temp2;
List<Integer> arrayAtomicNum = new ArrayList<Integer>();
List<String> arrayName = new ArrayList<String>();
List<String> arraySymbol = new ArrayList<String>();
List<String> arrayFamily = new ArrayList<String>();
List<String> arrayPhase = new ArrayList<String>();
List<String> arrayColor = new ArrayList<String>();
List<Integer> arrayGroup = new ArrayList<Integer>();
List<Integer> arrayPeriod = new ArrayList<Integer>();
List<String> arrayBlock = new ArrayList<String>();
List<Integer> arrayProtons = new ArrayList<Integer>();
List<Integer> arrayNeutrons = new ArrayList<Integer>();
List<Integer> arrayElectrons = new ArrayList<Integer>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_learn);
Log.d(TAG, "Learn layout loaded successfully");
while (atomicNum < 3) {
atomicNum++;
if (atomicNum == 1) {
ElementStructure.setName("Hydrogen");
ElementStructure.setSymbol("H");
ElementStructure.setFamily("Non metals");
ElementStructure.setPhase("Gas");
ElementStructure.setColor("Colorless");
ElementStructure.setAtomicNum(atomicNum);
ElementStructure.setGroup(1);
ElementStructure.setPeriod(1);
ElementStructure.setBlock("s");
ElementStructure.setProton(atomicNum);
} else if (atomicNum == 2) {
ElementStructure.setName("Helium");
ElementStructure.setSymbol("He");
ElementStructure.setFamily("Noble gases");
ElementStructure.setPhase("Gas");
ElementStructure.setColor("Colorless");
ElementStructure.setAtomicNum(atomicNum);
ElementStructure.setGroup(18);
ElementStructure.setPeriod(1);
ElementStructure.setBlock("s");
ElementStructure.setProton(atomicNum);
} else if (atomicNum == 3) {
ElementStructure.setName("Lithium");
ElementStructure.setSymbol("Li");
ElementStructure.setFamily("Alkali metals");
ElementStructure.setPhase("Solid");
ElementStructure.setColor("Silvery white");
ElementStructure.setAtomicNum(atomicNum);
ElementStructure.setGroup(1);
ElementStructure.setPeriod(2);
ElementStructure.setBlock("s");
}
// Atoms must have equal number(s) of protons and electrons
ElementStructure.setElectron(ElementStructure.getProton());
/* Legend:
* temp1-atomic weight rounded to nearest whole integer
* temp2-number of neutrons */
//temp1 = (int)Math.round(ElementStructure.getWeight());
temp1 = 100; //just a test value
temp2 = temp1 - ElementStructure.getProton();
ElementStructure.setNeutron(temp2);
// Populate arrays
arrayAtomicNum.add(ElementStructure.getAtomicNum());
arrayName.add(ElementStructure.getName());
arraySymbol.add(ElementStructure.getSymbol());
arrayFamily.add(ElementStructure.getFamily());
arrayPhase.add(ElementStructure.getPhase());
arrayColor.add(ElementStructure.getColor());
arrayGroup.add(ElementStructure.getGroup());
arrayPeriod.add(ElementStructure.getPeriod());
arrayBlock.add(ElementStructure.getBlock());
arrayProtons.add(ElementStructure.getProton());
arrayNeutrons.add(ElementStructure.getNeutron());
arrayElectrons.add(ElementStructure.getElectron());
} //end while loop
viewPager = (ViewPager)findViewById(R.id.pager);
viewPager.setOffscreenPageLimit(3);
adapter = new ViewPagerAdapter(LearnActivity.this, arrayAtomicNum, arrayName,
arraySymbol, arrayFamily, arrayPhase, arrayColor, arrayGroup, arrayPeriod,
arrayBlock, arrayProtons, arrayNeutrons, arrayElectrons);
viewPager.setAdapter(adapter);
}
}
public class ViewPagerAdapter extends PagerAdapter {
public static String TAG = ViewPagerAdapter.class.getSimpleName();
Context context;
LayoutInflater inflater;
List<Integer> arrayAtomicNum = new ArrayList<Integer>();
List<String> arrayName = new ArrayList<String>();
List<String> arraySymbol = new ArrayList<String>();
List<String> arrayFamily = new ArrayList<String>();
List<String> arrayPhase = new ArrayList<String>();
List<String> arrayColor = new ArrayList<String>();
List<Integer> arrayGroup = new ArrayList<Integer>();
List<Integer> arrayPeriod = new ArrayList<Integer>();
List<String> arrayBlock = new ArrayList<String>();
List<Integer> arrayProtons = new ArrayList<Integer>();
List<Integer> arrayNeutrons = new ArrayList<Integer>();
List<Integer> arrayElectrons = new ArrayList<Integer>();
public ViewPagerAdapter(Context context, List<Integer> arrayAtomicNum,
List<String> arrayName, List<String> arraySymbol, List<String> arrayFamily,
List<String> arrayPhase, List<String> arrayColor, List<Integer> arrayGroup,
List<Integer> arrayPeriod, List<String> arrayBlock, List<Integer> arrayProtons,
List<Integer> arrayNeutrons, List<Integer> arrayElectrons) {
this.context = context;
this.arrayAtomicNum = arrayAtomicNum;
this.arrayName = arrayName;
this.arraySymbol = arraySymbol;
this.arrayFamily = arrayFamily;
this.arrayPhase = arrayPhase;
this.arrayColor = arrayColor;
this.arrayGroup = arrayGroup;
this.arrayPeriod = arrayPeriod;
this.arrayBlock = arrayBlock;
this.arrayProtons = arrayProtons;
this.arrayNeutrons = arrayNeutrons;
this.arrayElectrons = arrayElectrons;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
//return 0;
return arrayAtomicNum.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
// TODO Auto-generated method stub
//return false;
return view == ((RelativeLayout) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
// Declare Variables
TextView tvNumber; // container for atomic number
TextView tvSymbol; // container for symbol
TextView tvName; // container for name
TextView tvGroup; // container for group
TextView tvPeriod; // container for period
TextView tvBlock; // container for block
TextView tvFamily; // container for family
TextView tvColor; // container for color
TextView tvPhase; // container for phase
TextView tvNeutrons; // container for neutrons
TextView tvProtons; // container for protons
TextView tvElectrons; // container for electrons
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.frame_learn, container,
false);
// Locate the TextViews in viewpager_item.xml
// atomic number textView
tvNumber = (TextView)itemView.findViewById(R.id.metanumber);
// symbol textView
tvSymbol = (TextView)itemView.findViewById(R.id.metasymbol);
// name textView
tvName = (TextView)itemView.findViewById(R.id.metaname);
// group textView
tvGroup = (TextView)itemView.findViewById(R.id.metagroup);
// period textView
tvPeriod = (TextView)itemView.findViewById(R.id.metaperiod);
// block textView
tvBlock = (TextView)itemView.findViewById(R.id.metablock);
// family textView
tvFamily = (TextView)itemView.findViewById(R.id.metafamily);
// color textView
tvColor = (TextView)itemView.findViewById(R.id.metacolor);
// phase textView
tvPhase = (TextView)itemView.findViewById(R.id.metaphase);
// neutrons textView
tvNeutrons = (TextView)itemView.findViewById(R.id.metaneutrons);
// protons textView
tvProtons = (TextView)itemView.findViewById(R.id.metaprotons);
// electrons textView
tvElectrons = (TextView)itemView.findViewById(R.id.metaelectrons);
//comment out the setText and logs will print out full arrayLists
Log.d(TAG, "arrayAtomicNum.get(position): " + arrayAtomicNum.get(position));
Log.d(TAG, "arraySymbol.get(position): " + arraySymbol.get(position));
Log.d(TAG, "arrayName.get(position): " + arrayName.get(position));
// Capture position and set to the TextViews
tvNumber.setText(arrayAtomicNum.get(position));
tvSymbol.setText(arraySymbol.get(position));
tvName.setText(arrayName.get(position));
tvGroup.setText(arrayGroup.get(position));
tvPeriod.setText(arrayPeriod.get(position));
tvBlock.setText(arrayBlock.get(position));
tvFamily.setText(arrayFamily.get(position));
tvColor.setText(arrayColor.get(position));
tvPhase.setText(arrayPhase.get(position));
tvNeutrons.setText(arrayNeutrons.get(position));
tvProtons.setText(arrayProtons.get(position));
tvElectrons.setText(arrayElectrons.get(position));
// Add viewpager_item.xml to ViewPager
((ViewPager) container).addView(itemView);
return itemView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
// Remove viewpager_item.xml from ViewPager
((ViewPager) container).removeView((RelativeLayout) object);
}
}
전체 클래스
모든 arrayLists에 올바른 값이 있습니다. 내가 원하는 모든 데이터를 적절하게 연관시켰다. 더 많은 것이 있지만, 나는이 지위를 제한하려고 노력하고있다. 두 경우 모두 아래 오류가 발생하는 이유는 무엇입니까? 나는 setText를 시도 할 때 그것이 일어난다는 것을 안다, 그러나 왜? 당신은 텍스트 뷰에 텍스트로 정수를 설정하려면 그냥 int 값의 텍스트 뷰를 설정합니다 경우
예! 당신 Eddy 남자, 그게 내가이 오류를 얻는 이유입니다. 모든 것이 이제 완벽하게 작동합니다! 이 팁을 확실히 기억해 두겠습니다. 이제 알겠습니다. – portfoliobuilder
오신 것을 환영합니다. .. – Eddy