VerticalStepperView: notifyItemRangeChanged instead (Better animation)

Signed-off-by: Fung <fython@163.com>

Author: fython

demo/src/main/res/layout/fragment_vertical_stepper_adapter.xml

@@ -8,7 +8,7 @@
 	<moe.feng.common.stepperview.VerticalStepperView
 			android:id="@+id/vertical_stepper_view"
 			android:layout_width="match_parent"
-			android:layout_height="wrap_content"
+			android:layout_height="match_parent"
 			app:step_done_icon="@drawable/ic_done_white_16dp"
 			app:step_animation_duration="@android:integer/config_mediumAnimTime"/>
 

library/src/main/java/moe/feng/common/stepperview/StepperViewAdapter.java

@@ -2,7 +2,6 @@
 
 import android.content.Context;
 import android.view.View;
-import android.view.ViewGroup;
 
 public abstract class StepperViewAdapter implements IStepperViewAdapter {
 
@@ -24,11 +23,6 @@ public View getView(int index) {
 		return mViews[index];
 	}
 
-	@Override
-	public String getTitle(int index) {
-		return "Step " + index;
-	}
-
 	@Override
 	public int size() {
 		return mViews.length;

library/src/main/java/moe/feng/common/stepperview/VerticalStepperView.java

@@ -67,7 +67,7 @@ private void prepareListView(Context context) {
 		mListView.setLayoutManager(new LinearLayoutManager(context));
 		mListView.setAdapter(mAdapter);
 
-		addView(mListView, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
+		addView(mListView, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
 	}
 
 	public void setViewAdapter(IStepperViewAdapter viewAdapter) {
@@ -90,7 +90,7 @@ public boolean canPrev() {
 	public boolean nextStep() {
 		if (canNext()) {
 			mCurrentStep++;
-			mAdapter.notifyDataSetChanged();
+			mAdapter.notifyItemRangeChanged(mCurrentStep - 1, 2);
 			return true;
 		}
 		return false;
@@ -99,7 +99,7 @@ public boolean nextStep() {
 	public boolean prevStep() {
 		if (canPrev()) {
 			mCurrentStep--;
-			mAdapter.notifyDataSetChanged();
+			mAdapter.notifyItemRangeChanged(mCurrentStep, 2);
 			return true;
 		}
 		return false;
@@ -136,8 +136,11 @@ public Drawable getDoneIcon() {
 	}
 
 	public void setCurrentStep(int currentStep) {
+		int minIndex = Math.min(currentStep, mCurrentStep);
+		int count = Math.abs(mCurrentStep - currentStep) + 1;
+
 		mCurrentStep = currentStep;
-		mAdapter.notifyDataSetChanged();
+		mAdapter.notifyItemRangeChanged(minIndex, count);
 	}
 
 	class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ItemHolder> {