Adding app grid layout with fastscroller.

- Adding filtering and using alphabetic index for app grouping.

Change-Id: I745b644fa8f90f5ff24a8642ac377ef1c65d8aff

1 files changed, 119 insertions, 0 deletions

diff --git a/src/com/android/launcher3/AppsListAdapter.java b/src/com/android/launcher3/AppsListAdapter.java
new file mode 100644
index 000000000..8ac381e79
--- /dev/null
+++ b/src/com/android/launcher3/AppsListAdapter.java
@@ -0,0 +1,119 @@
+package com.android.launcher3;
+
+import android.content.Context;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import com.android.launcher3.compat.AlphabeticIndexCompat;
+
+/**
+ * The linear list view adapter for all the apps.
+ */
+class AppsListAdapter extends RecyclerView.Adapter<AppsListAdapter.ViewHolder> {
+
+    /**
+     * ViewHolder for each row.
+     */
+    public static class ViewHolder extends RecyclerView.ViewHolder {
+        public View mContent;
+
+        public ViewHolder(View v) {
+            super(v);
+            mContent = v;
+        }
+    }
+
+    private static final int SECTION_BREAK_VIEW_TYPE = 0;
+    private static final int ICON_VIEW_TYPE = 1;
+
+    private LayoutInflater mLayoutInflater;
+    private AlphabeticalAppsList mApps;
+    private View.OnTouchListener mTouchListener;
+    private View.OnClickListener mIconClickListener;
+    private View.OnLongClickListener mIconLongClickListener;
+
+    public AppsListAdapter(Context context, AlphabeticalAppsList apps,
+            View.OnTouchListener touchListener, View.OnClickListener iconClickListener,
+            View.OnLongClickListener iconLongClickListener) {
+        mApps = apps;
+        mLayoutInflater = LayoutInflater.from(context);
+        mTouchListener = touchListener;
+        mIconClickListener = iconClickListener;
+        mIconLongClickListener = iconLongClickListener;
+    }
+
+    public RecyclerView.LayoutManager getLayoutManager(Context context) {
+        return new LinearLayoutManager(context);
+    }
+
+    @Override
+    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        switch (viewType) {
+            case SECTION_BREAK_VIEW_TYPE:
+                return new ViewHolder(new View(parent.getContext()));
+            case ICON_VIEW_TYPE:
+                // Inflate the row and all the icon children necessary
+                ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.apps_list_row_view,
+                        parent, false);
+                BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(
+                        R.layout.apps_list_row_icon_view, row, false);
+                LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(0,
+                        ViewGroup.LayoutParams.WRAP_CONTENT, 1);
+                lp.gravity = Gravity.CENTER_VERTICAL;
+                icon.setLayoutParams(lp);
+                icon.setOnTouchListener(mTouchListener);
+                icon.setOnClickListener(mIconClickListener);
+                icon.setOnLongClickListener(mIconLongClickListener);
+                icon.setFocusable(true);
+                row.addView(icon);
+                return new ViewHolder(row);
+            default:
+                throw new RuntimeException("Unexpected view type");
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(ViewHolder holder, int position) {
+        AppInfo info = mApps.getApps().get(position);
+        if (info != AlphabeticalAppsList.SECTION_BREAK_INFO) {
+            ViewGroup content = (ViewGroup) holder.mContent;
+            String sectionDescription = mApps.getSectionNameForApp(info);
+
+            // Bind the section header
+            boolean showSectionHeader = true;
+            if (position > 0) {
+                AppInfo prevInfo = mApps.getApps().get(position - 1);
+                showSectionHeader = (prevInfo == AlphabeticalAppsList.SECTION_BREAK_INFO);
+            }
+            TextView tv = (TextView) content.findViewById(R.id.section);
+            if (showSectionHeader) {
+                tv.setText(sectionDescription);
+                tv.setVisibility(View.VISIBLE);
+            } else {
+                tv.setVisibility(View.INVISIBLE);
+            }
+
+            // Bind the icon
+            BubbleTextView icon = (BubbleTextView) content.getChildAt(1);
+            icon.applyFromApplicationInfo(info);
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return mApps.getApps().size();
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        if (mApps.getApps().get(position) == AlphabeticalAppsList.SECTION_BREAK_INFO) {
+            return SECTION_BREAK_VIEW_TYPE;
+        }
+        return ICON_VIEW_TYPE;
+    }
+}