我试图用光标中的数据填充数组，但是如何填充？这是我的代码:
public class Tab3Up extends Activity {
private HipotecaDbAdapter dbAdapter;
private Cursor cursor;
private long id ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.imageslide);
ViewPagerAdapter adapter = new ViewPagerAdapter(this, imageArra);
ViewPager myPager = (ViewPager) findViewById(R.id.view_pager);
myPager.setAdapter(adapter);
myPager.setCurrentItem(0);
dbAdapter = new HipotecaDbAdapter(this);
dbAdapter.abrir();
cursor = dbAdapter.getRegistro(id);
}
private int imageArra[] = { R.drawable.foto1, R.drawable.foto2,
R.drawable.foto3, R.drawable.foto4, };
还有我的适配器:
public class ViewPagerAdapter extends PagerAdapter {
Activity activity;
int imageArray[];
public ViewPagerAdapter(Activity act, int[] imgArra) {
imageArray = imgArra;
activity = act;
}
public int getCount() {
return imageArray.length;
}
//MORE CODE HERE....
使用此代码，我的应用程序可以正常工作，但我需要更改主代码以使用来自 sqlite bd 的数据填充数组。我的sqlite bd有一个字段保存所有图像的路径。
类似这样的吗？
ArrayList<Integer> array=new ArrayList<Integer>();
if (cursor.moveToFirst()) {
do {
array.add(cursor.getInt(cursor.getColumnIndex(HipotecaDbAdapter.C_COLUMNA_FOTO1))); //<< pass column index here instead of i
} while (cursor.moveToNext());
}
//fotos[0] = (Integer[])array.toArray(new Integer[array.size()]);
最佳答案
这并不是您问题的真正答案，但是，我还从 sqlite 中提取数据并将其显示在 View 分页器中。在此我尝试提取联系信息(姓名和电话号码)。每个联系信息都会显示在不同的屏幕上。
这是我的做法:
Step 1: in my on create method, I am setting my adapter that I have made to display specific content.
public class ViewTest extends Activity {
private List<String> testContactName = new ArrayList<String>();
private List<String> testContactNumber = new ArrayList<String>();
MyAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.viewpager_layout);
ViewPager mViewPager = (ViewPager) findViewById(R.id.pager);
mAdapter = new MyAdapter();
mViewPager.setAdapter(mAdapter);
try {
getAllContacts();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Step 2 : Just getting all contacts from the database and adding the values to my arraylist.
public void getAllContacts() {
Cursor cursor = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
null,
null,
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME
+ " COLLATE LOCALIZED ASC");
// Looping through the contacts and adding them to arrayList
while (cursor.moveToNext()) {
String name = cursor
.getString(cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = cursor
.getString(cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
testContactName.add(name);
mAdapter.notifyDataSetChanged();
Log.i("Name: " + "" + "---", name);
testContactNumber.add(phoneNumber);
mAdapter.notifyDataSetChanged();
Log.i("Number: " + "" + "---", phoneNumber);
}
cursor.close();
}
Step 3: Defining my adapter.
private class MyAdapter extends PagerAdapter {
public MyAdapter() {
super();
}
@Override
public int getCount() {
return testContactName.size();
}
@Override
public boolean isViewFromObject(View collection, Object object) {
return collection == ((View) object);
}
@Override
public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.viewpager_items, null);
TextView contactName = (TextView) view.findViewById(R.id.labelText);
TextView contactNumber = (TextView) view
.findViewById(R.id.answerText);
try {
contactName.setText(testContactName.get(position));
contactNumber.setText(testContactNumber.get(position));
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
((ViewPager) collection).addView(view, 0);
return view;
}
@Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager) collection).removeView((View) view);
mAdapter.notifyDataSetChanged();
}
}
}
最后，布局:
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"></android.support.v4.view.ViewPager>
如果你想要viewpager_items.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/background"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/background_dark"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/labelText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="30dp"
android:background="@android:color/background_dark"
android:gravity="left"
android:text="Loading..."
android:textColor="#FFFFFF"
android:textSize="24sp"
android:textStyle="bold"
android:typeface="sans" />
<View
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="@android:color/background_dark" />
<ScrollView
android:id="@+id/scrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/answerText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="30dp"
android:gravity="left"
android:padding="5dp"
android:text="Loading.."
android:textColor="#FFFFFF"
android:textSize="24sp" />
</ScrollView>
</LinearLayout>
希望这能让您对您的问题有所了解。
希望这也能帮助其他观众......:)
关于java - 用光标、Viewpager 中的数据填充数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21622705/