我有一个cardview，我在其中根据是否满足特定条件来动态加载textview。从下面的代码中可以看到，onBindViewHolder中有2个if条件。如果满足，第一个将始终产生1个textview。所以我有1张卡，其值来自mPurchaseDateList，一张值来自mVehicleList。这样可以产生具有该结构的多个卡。我的第二个条件将始终产生1张卡，该卡具有mPurchaseDateList中的值，而mVehicleList中具有MULTIPLE个值，这取决于“昨天”的出现次数。列表中值的位置已经按照我的需要进行了排序，并且两个列表中的计数始终相等。我用下面的代码实现了我所需要的，但是当我向下滚动时，我总是遇到错误。我认为这是因为我添加数据后会从列表中删除数据，以避免重复。
public DataAdapter(MainActivity activity, ArrayList<String> mVehicleList, ArrayList<String> mPurchaseDateList) {
this.mActivity = activity;
this.mVehicleList= mVehicleList;
this.mPurchaseDateList= mPurchaseDateList;
countPurchaseDateList();
}
private LinearLayout llVehicleName;
private TextView tv_PurchaseDate;
public MyViewHolder(View view) {
super(view);
llVehicleName = (LinearLayout) view.findViewById(R.id.row_tv_vehicle_name);
tv_PurchaseDate = (TextView) view.findViewById(R.id.row_tv_purchase_date);
}
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.activity_row_data, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
//the header
holder.tv_PurchaseDate.setText(mPurchaseDateList.get(position));
if (mPurchaseDateList.get(position).equalsIgnoreCase("Today")) {
addTextViews(holder, position);
}
if (mPurchaseDateList.get(position).equalsIgnoreCase("Yesterday")) {
for(int i=0;i < yesterdayCounter;i++) {
addTextViews(holder, position);
//remove the vehicle and date to avoid duplicates
mVehicleList.remove(position);
mPurchaseDateList.remove(position);
}
}
}
以下方法添加了我的文本视图（或多个实例，具体取决于"Yesterday"中出现mPurchaseDateList的次数）
private void addTextViews(MyViewHolder holder, final int position) {
RecyclerView.LayoutParams lparams = new RecyclerView.LayoutParams(RecyclerView.LayoutParams.WRAP_CONTENT, RecyclerView.LayoutParams.WRAP_CONTENT);
TextView tv = new TextView(holder.llVehicleName.getContext());
tv.setLayoutParams(lparams);
tv.setText(mVehicleList.get(position));
holder.llVehicleName.addView(tv);
}
以下方法告诉我"Yesterday"出现了多少次：
public void countPurchaseDateList () {
for(int i=0; i < mPurchaseDateList.size(); i++)
if (mPurchaseDateList.get(i).equalsIgnoreCase("Yesterday")) {
yesterdayCounter++;
}
}
开始向下滚动后引发的错误：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mySampleProject, PID: 11262
java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid view holder adapter positionViewHolder{c91c8a2 position=7 id=-1, oldPos=-1, pLpos:-1 no parent} android.support.v7.widget.RecyclerView{47ff933 VFED..... ........ 0,0-1440,2432 #7f070006 app:id/act_recyclerview}, adapter:com.mySampleProject.DataAdapter@8dcd4f0, layout:android.support.v7.widget.LinearLayoutManager@87fa69, context:com.mySampleProject.Activity.MainActivity@d943958
at android.support.v7.widget.RecyclerView$Recycler.validateViewHolderForOffsetPosition(RecyclerView.java:5715)
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5898)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1331)
at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:1075)
at android.support.v7.widget.RecyclerView.scrollStep(RecyclerView.java:1832)
at android.support.v7.widget.RecyclerView.scrollByInternal(RecyclerView.java:1927)
at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:3187)
at android.view.View.dispatchTouchEvent(View.java:12513)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3024)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2705)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:440)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1830)
at android.app.Activity.dispatchTouchEvent(Activity.java:3400)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:398)
at android.view.View.dispatchPointerEvent(View.java:12752)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5106)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4909)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4426)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4479)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4445)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4585)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4453)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4642)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4426)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4479)
E/AndroidRuntime: at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4445)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4453)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4426)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7092)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7061)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7022)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7195)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:186)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:177)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7166)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7218)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
at android.view.Choreographer.doCallbacks(Choreographer.java:761)
at android.view.Choreographer.doFrame(Choreographer.java:690)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)