我有一个自定义光标适配器，其中每一行都包含一个复选框、 TextView 和按钮。 该按钮最初设置为 GONE，当用户选中我希望按钮显示的复选框，以便用户可以单击它并删除相应的行。
我的问题是，在我的 getView() 中，我无法获得正确的光标，所以不断获得 cursorOutOfBoundsExceptions。
如果我不再需要它，我还想删除 bindView()。
public class DeleteCampaignCustomCursorAdapater extends CursorAdapter {
protected static final String TAG = null;
DatabaseHelper myDbHelper;
protected SQLiteDatabase db;
private final Activity context;
private LayoutInflater mInflater;
protected ListView mListView;
private Cursor c;
public static int[] checked;
TextView merchantNameView;
Button deleteButton;
CheckBox selectForDelete;
//ImageView moveButton;
public DeleteCampaignCustomCursorAdapater(Context context, Cursor c) {
super(context, c);
this.context = (Activity) context;
mInflater = LayoutInflater.from(context);
this.c = c;
initializeChecked();
}
@Override
public void bindView(View view, Context context, final Cursor cursor) {
/*myDbHelper = new DatabaseHelper(context); //Links to DatabaseHelper class
merchantNameView = (TextView) view.findViewById(R.id.deleteMerchantNameView);
deleteButton = (Button) view.findViewById(R.id.deleteButton);
//selectForDelete = (CheckBox) view.findViewById(R.id.deleteCheckBox);
//moveButton = (ImageView) view.findViewById(R.id.moveButton);
merchantNameView.setText(cursor.getString(cursor.getColumnIndex("merchantName")));
final int rowID = cursor.getInt(cursor.getColumnIndex("_id"));
//final long rowID = mListView.getSelectedItemId();
if (checked[rowID] == 0) {
selectForDelete.setChecked(false);
} else {
selectForDelete.setChecked(true);
}
selectForDelete.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if ( isChecked )
{
// Make deleteButton appear
RelativeLayout ll = (RelativeLayout) buttonView.getParent();
deleteButton = (Button) ll.findViewById(R.id.deleteButton);
checked[rowID] = 1;
deleteButton.setVisibility(0);
}
else {
//Hide deleteButton
RelativeLayout ll = (RelativeLayout) buttonView.getParent();
deleteButton = (Button) ll.findViewById(R.id.deleteButton);
checked[rowID] = 1;
deleteButton.setVisibility(8);
}
}
});
deleteButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
if(rowID > 0) {
//Log.d(TAG, "Button Click. rowID = "+rowID);
myDbHelper.deleteRecordWithID(rowID);
cursor.requery();
notifyDataSetChanged();
initializeChecked(); // re-set the checked array
}
}
}); */
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return mInflater.inflate(R.layout.delete_campaign_row_layout, null);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
myDbHelper = new DatabaseHelper(context); //Links to DatabaseHelper class
if (convertView == null) {
mInflater = context.getLayoutInflater();
convertView = mInflater.inflate(R.layout.delete_campaign_row_layout, null);
}
merchantNameView = (TextView) convertView.findViewById(R.id.deleteMerchantNameView);
deleteButton = (Button) convertView.findViewById(R.id.deleteButton);
selectForDelete = (CheckBox) convertView.findViewById(R.id.deleteCheckBox);
merchantNameView.setText(c.getString(c.getColumnIndex("merchantName")));
final int rowID = c.getInt(c.getColumnIndex("_id"));
//final long rowID = mListView.getSelectedItemId();
if (checked[position] == 0) {
selectForDelete.setChecked(false);
} else {
selectForDelete.setChecked(true);
}
selectForDelete.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if ( isChecked )
{
// Make deleteButton appear
RelativeLayout ll = (RelativeLayout) buttonView.getParent();
deleteButton = (Button) ll.findViewById(R.id.deleteButton);
checked[position] = 1;
deleteButton.setVisibility(0);
}
else {
//Hide deleteButton
RelativeLayout ll = (RelativeLayout) buttonView.getParent();
deleteButton = (Button) ll.findViewById(R.id.deleteButton);
checked[position] = 1;
deleteButton.setVisibility(8);
}
}
});
deleteButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
if(rowID > 0) {
//Log.d(TAG, "Button Click. rowID = "+rowID);
myDbHelper.deleteRecordWithID(rowID);
c.requery();
notifyDataSetChanged();
initializeChecked(); // re-set the checked array
}
}
});
return convertView;
}
public void initializeChecked() {
checked = new int[c.getCount()];
int i = 0;
while (i < c.getCount()) {
checked[i] = 0;
i++;
}
}
日志:
05-12 00:36:23.232: W/KeyCharacterMap(15777): Can't open keycharmap file
05-12 00:36:23.232: W/KeyCharacterMap(15777): Error loading keycharmap file '/system/usr/keychars/synaptics-rmi-touchscreen.kcm.bin'. hw.keyboards.65537.devname='synaptics-rmi-touchscreen'
05-12 00:36:23.232: I/KeyCharacterMap(15777): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
05-12 00:36:23.332: D/WindowManagerImpl(15777): addView, new view, mViews[1]: com.android.internal.policy.impl.PhoneWindow$DecorView@4053e328
05-12 00:36:23.903: D/View(15777): onTouchEvent: viewFlags: 0x18005001
05-12 00:36:23.903: D/View(15777): onTouchEvent: isFocusable: true, isFocusableInTouchMode: false, isFocused: false; focusTaken: false
05-12 00:36:23.913: D/WindowManagerImpl(15777): finishRemoveViewLocked, mViews[1]: com.android.internal.policy.impl.PhoneWindow$DecorView@4053e328
05-12 00:36:23.973: D/Database(15777): dbopen(): path = /data/data/com.roardog.FidelrBasic/databases/Fidelr_memory, flag = 6, file size = 5120
05-12 00:36:23.973: D/Database(15777): dbopen(): path = /data/data/com.roardog.FidelrBasic/databases/Fidelr_memory, mode: wal, disk free size: 253 M, handle: 0x387968
05-12 00:36:23.983: D/ATRecorder(15777): com.htc.autotest.dlib.RecordEngine in loader dalvik.system.DexClassLoader@40550268
05-12 00:36:23.983: D/WindowManagerImpl(15777): addView, new view, mViews[1]: com.android.internal.policy.impl.PhoneWindow$DecorView@40548d90
05-12 00:36:23.993: D/AndroidRuntime(15777): Shutting down VM
05-12 00:36:23.993: W/dalvikvm(15777): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0)
05-12 00:36:24.023: E/AndroidRuntime(15777): FATAL EXCEPTION: main
05-12 00:36:24.023: E/AndroidRuntime(15777): android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 3
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:585)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
05-12 00:36:24.023: E/AndroidRuntime(15777): at com.roardog.FidelrBasic.DeleteCampaignCustomCursorAdapater.getView(DeleteCampaignCustomCursorAdapater.java:125)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.AbsListView.obtainView(AbsListView.java:1449)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.ListView.measureHeightOfChildren(ListView.java:1265)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.ListView.onMeasure(ListView.java:1128)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.View.measure(View.java:8553)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3261)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.View.measure(View.java:8553)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3261)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.View.measure(View.java:8553)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3261)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.View.measure(View.java:8553)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.ViewRoot.performTraversals(ViewRoot.java:915)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.view.ViewRoot.handleMessage(ViewRoot.java:1991)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.os.Handler.dispatchMessage(Handler.java:99)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.os.Looper.loop(Looper.java:150)
05-12 00:36:24.023: E/AndroidRuntime(15777): at android.app.ActivityThread.main(ActivityThread.java:4385)
05-12 00:36:24.023: E/AndroidRuntime(15777): at java.lang.reflect.Method.invokeNative(Native Method)
05-12 00:36:24.023: E/AndroidRuntime(15777): at java.lang.reflect.Method.invoke(Method.java:507)
05-12 00:36:24.023: E/AndroidRuntime(15777): 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 05-12 00:36:24.023: E/AndroidRuntime(15777): 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607) 05-12 00:36:24.023:E/AndroidRuntime(15777):在 dalvik.system.NativeStart.main( native 方法) 05-12 00:36:25.304: D/进程 (15777): killProcess, pid=15777 05-12 00:36:25.304:D/进程(15777):dalvik.system.VMStack.getThreadStackTrace( native 方法) 05-12 00:36:25.304: D/进程 (15777): java.lang.Thread.getStackTrace(Thread.java:745) 05-12 00:36:25.304: D/进程 (15777): android.os.Process.killProcess(Process.java:797) 05-12 00:36:25.304: D/进程(15777):com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:108) 05-12 00:36:25.304: D/进程(15777):java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:854) 05-12 00:36:25.314: D/进程(15777):java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:851) 05-12 00:36:25.314:D/进程(15777):dalvik.system.NativeStart.main( native 方法) 05-12 00:36:25.314: I/Process(15777): 发送信号。 PID:15777 SIG:9
最终工作解决方案
public class DeleteCampaignCustomCursorAdapater extends CursorAdapter {
protected static final String TAG = null;
DatabaseHelper myDbHelper;
protected SQLiteDatabase db;
private final Activity context;
private LayoutInflater mInflater;
protected ListView mListView;
private Cursor c;
public static int[] checked;
TextView merchantNameView;
Button deleteButton;
CheckBox selectForDelete;
//ImageView moveButton;
public DeleteCampaignCustomCursorAdapater(Context context, Cursor c) {
super(context, c);
this.context = (Activity) context;
mInflater = LayoutInflater.from(context);
this.c = c;
c.moveToFirst();
initializeChecked();
}
@Override
public void bindView(View view, Context context, final Cursor cursor) {
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return mInflater.inflate(R.layout.delete_campaign_row_layout, null);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
c.moveToPosition(position);
myDbHelper = new DatabaseHelper(context); //Links to DatabaseHelper class
if (convertView == null) {
mInflater = context.getLayoutInflater();
convertView = mInflater.inflate(R.layout.delete_campaign_row_layout, null);
}
merchantNameView = (TextView) convertView.findViewById(R.id.deleteMerchantNameView);
deleteButton = (Button) convertView.findViewById(R.id.deleteButton);
selectForDelete = (CheckBox) convertView.findViewById(R.id.deleteCheckBox);
merchantNameView.setText(c.getString(c.getColumnIndex("merchantName")));
final int rowID = c.getInt(c.getColumnIndex("_id"));
if (checked[position] == 0) {
selectForDelete.setChecked(false);
} else {
selectForDelete.setChecked(true);
}
selectForDelete.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if ( isChecked )
{
// Make deleteButton appear
RelativeLayout ll = (RelativeLayout) buttonView.getParent();
deleteButton = (Button) ll.findViewById(R.id.deleteButton);
checked[position] = 1;
deleteButton.setVisibility(0);
}
else {
//Hide deleteButton
RelativeLayout ll = (RelativeLayout) buttonView.getParent();
deleteButton = (Button) ll.findViewById(R.id.deleteButton);
//checked[position] = 1;
deleteButton.setVisibility(8);
}
}
});
deleteButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
if(rowID > 0) {
//Log.d(TAG, "Button Click. rowID = "+rowID);
myDbHelper.deleteRecordWithID(rowID); //Call deleteRecord on selected row
c.requery(); //requery the cursor
notifyDataSetChanged(); //notify the view the data set has changed
initializeChecked(); // re-set the checked array
}
}
});
return convertView;
}
public void initializeChecked() {
checked = new int[c.getCount()];
int i = 0;
while (i < c.getCount()) {
checked[i] = 0;
i++;
}
}
最佳答案
在 initializeChecked(); 之前将 c.moveToFirst(); 添加到你的构造函数中。
编辑
首先在您的 getView 中添加:
c.moveToPosition(position);
关于android - 在 CustomCursor Adapter getView() 中获取正确的光标，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10553389/
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