Dream (screensaver) settings.

Depends on change Ied691856 for
Settings.Secure.DREAM_TIMEOUT and
Settings.Secure.DREAM_COMPONENT.

Change-Id: Ib6f74b74036e12637efb891b97e459a4e33444e7

src/com/android/settings/DreamComponentPreference.java

@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings;
+
+import static android.provider.Settings.Secure.DREAM_COMPONENT;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.ComponentName;
+import android.content.ContentResolver;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.res.Resources;
+import android.preference.Preference;
+import android.provider.Settings;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class DreamComponentPreference extends Preference {
+    private static final String TAG = "DreamComponentPreference";
+    
+    private final PackageManager pm;
+    private final ContentResolver resolver;
+
+    public DreamComponentPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        pm = getContext().getPackageManager();
+        resolver = getContext().getContentResolver();
+
+        refreshFromSettings();
+    }
+
+    private void refreshFromSettings() {
+        String component = Settings.Secure.getString(resolver, DREAM_COMPONENT);
+        if (component != null) {
+            ComponentName cn = ComponentName.unflattenFromString(component);
+            try {
+                setSummary(pm.getActivityInfo(cn, 0).loadLabel(pm));
+            } catch (PackageManager.NameNotFoundException ex) {
+                setSummary("(unknown)");
+            }
+        }
+    }
+
+    public class DreamListAdapter extends BaseAdapter implements ListAdapter {
+        private ArrayList<ResolveInfo> results;
+        private final LayoutInflater inflater;
+
+        public DreamListAdapter(Context context) {
+            Intent choosy = new Intent(Intent.ACTION_MAIN)
+                        .addCategory("android.intent.category.DREAM");
+
+            inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+            results = new ArrayList<ResolveInfo>(pm.queryIntentActivities(choosy, 0));
+        }
+
+        @Override
+        public int getCount() {
+            return results.size();
+        }
+
+        @Override
+        public Object getItem(int position) {
+            return results.get(position);
+        }
+
+        @Override
+        public long getItemId (int position) {
+            return (long) position;
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            View row = (convertView != null) 
+                ? convertView
+                : inflater.inflate(R.layout.dream_picker_row, parent, false);
+            ResolveInfo ri = results.get(position);
+            ((TextView)row.findViewById(R.id.title)).setText(ri.loadLabel(pm));
+            ((ImageView)row.findViewById(R.id.icon)).setImageDrawable(ri.loadIcon(pm));
+            return row;
+        }
+    }
+
+    @Override
+    protected void onClick() {
+        final DreamListAdapter list = new DreamListAdapter(getContext());
+        AlertDialog alert = new AlertDialog.Builder(getContext())
+            .setAdapter(
+                list,
+                new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        ResolveInfo ri = (ResolveInfo)list.getItem(which);
+                        ActivityInfo act = ri.activityInfo;
+                        ComponentName cn = new ComponentName(
+                            act.applicationInfo.packageName,
+                            act.name);
+                        Intent intent = new Intent(Intent.ACTION_MAIN).setComponent(cn);
+                        
+                        setSummary(ri.loadLabel(pm));
+                        //getContext().startActivity(intent);
+                        
+                        Settings.Secure.putString(resolver, DREAM_COMPONENT, cn.flattenToString());
+                    }
+                })
+            .create();
+        alert.show();
+    }
+}