当我打开某个扩展 ArrayAdapter 的类时,当我转到另一个屏幕并点击后退按钮时,会发生一些奇怪的事情。我设置对于某些值,膨胀的 xml 文件的背景应该设置为灰色(200,200,200)。但是当我现在点击后退按钮时,一切都是灰色的,尽管当我只是通过主屏幕进入那里时它显示良好(而不是点击后退按钮......)类看起来像这样:
覆盖getView方法的代码:
@Override
public View getView(int position, View v, ViewGroup parent) {
View mView = v;
if (mView == null) {
LayoutInflater vi = (LayoutInflater) getContext().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
mView = vi.inflate(R.layout.levelselector_item, null);
}
TextView level = (TextView) mView.findViewById(R.id.tvLevel);
TextView levelScore = (TextView) mView.findViewById(R.id.tvLevelScore);
if (mView != null) {
level.setText(Integer.toString(getItem(position).getLevel()));
loadDataBase();
int correctAnswers = myDbHelper.getCorrectAnswers(getItem(position).getLevel());
int correctAnswersPrev = 0;
int correctAnswersPrev = myDbHelper.getCorrectAnswersPrev(getItem(position).getLevel());
String correct = Integer.toString(correctAnswers);
levelScore.setText(correct + "/60");
level.setTypeface(font);
levelScore.setTypeface(font);
if (correctAnswersPrev < 2 && !correct.equals("") ){
mView.setBackgroundColor(Color.argb(200, 200, 200, 200));
}
}
return mView;
}
private void loadDataBase() {
// TODO Auto-generated method stub
myDbHelper = new DataBaseHelper(C);
try {
myDbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
myDbHelper.openDataBase();
} catch (SQLException sqle) {
throw sqle;
}
}
格兹!