Introduce 'Home' settings

Bug 9958444

Change-Id: I868f5b7aa6ae9273b725cb96e80821a82569e7e0

1 files changed, 243 insertions, 0 deletions

diff --git a/src/com/android/settings/HomeSettings.java b/src/com/android/settings/HomeSettings.java
new file mode 100644
index 0000000..6d937fd
--- /dev/null
+++ b/src/com/android/settings/HomeSettings.java
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2013 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 java.util.ArrayList;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ActivityInfo;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.graphics.ColorFilter;
+import android.graphics.ColorMatrix;
+import android.graphics.ColorMatrixColorFilter;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Handler;
+import android.preference.Preference;
+import android.preference.PreferenceGroup;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.ImageView;
+import android.widget.RadioButton;
+
+public class HomeSettings extends SettingsPreferenceFragment {
+    static final String TAG = "HomeSettings";
+
+    static final int REQUESTING_UNINSTALL = 10;
+
+    public static final String CURRENT_HOME = "current_home";
+
+    PreferenceGroup mPrefGroup;
+
+    PackageManager mPm;
+    ComponentName[] mHomeComponentSet;
+    ArrayList<HomeAppPreference> mPrefs;
+    HomeAppPreference mCurrentHome = null;
+    final IntentFilter mHomeFilter;
+
+    public HomeSettings() {
+        mHomeFilter = new IntentFilter(Intent.ACTION_MAIN);
+        mHomeFilter.addCategory(Intent.CATEGORY_HOME);
+        mHomeFilter.addCategory(Intent.CATEGORY_DEFAULT);
+    }
+
+    OnClickListener mHomeClickListener = new OnClickListener() {
+        @Override
+        public void onClick(View v) {
+            int index = (Integer)v.getTag();
+            HomeAppPreference pref = mPrefs.get(index);
+            if (!pref.isChecked) {
+                makeCurrentHome(pref);
+            }
+        }
+    };
+
+    OnClickListener mDeleteClickListener = new OnClickListener() {
+        @Override
+        public void onClick(View v) {
+            int index = (Integer)v.getTag();
+            uninstallApp(mPrefs.get(index));
+        }
+    };
+
+    void makeCurrentHome(HomeAppPreference newHome) {
+        if (mCurrentHome != null) {
+            mCurrentHome.setChecked(false);
+        }
+        newHome.setChecked(true);
+        mCurrentHome = newHome;
+
+        mPm.replacePreferredActivity(mHomeFilter, IntentFilter.MATCH_CATEGORY_EMPTY,
+                mHomeComponentSet, newHome.activityName);
+    }
+
+    void uninstallApp(HomeAppPreference pref) {
+        // Uninstallation is done by asking the OS to do it
+       Uri packageURI = Uri.parse("package:" + pref.activityName.getPackageName());
+       Intent uninstallIntent = new Intent(Intent.ACTION_UNINSTALL_PACKAGE, packageURI);
+       uninstallIntent.putExtra(Intent.EXTRA_UNINSTALL_ALL_USERS, false);
+       int requestCode = REQUESTING_UNINSTALL + (pref.isChecked ? 1 : 0);
+       startActivityForResult(uninstallIntent, requestCode);
+   }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+
+        // Rebuild the list now that we might have nuked something
+        buildHomeActivitiesList();
+
+        // if the previous home app is now gone, fall back to the system one
+        if (requestCode > REQUESTING_UNINSTALL) {
+            // if mCurrentHome has gone null, it means we didn't find the previously-
+            // default home app when rebuilding the list, i.e. it was the one we
+            // just uninstalled.  When that happens we make the system-bundled
+            // home app the active default.
+            if (mCurrentHome == null) {
+                for (int i = 0; i < mPrefs.size(); i++) {
+                    HomeAppPreference pref = mPrefs.get(i);
+                    if (pref.isSystem) {
+                        makeCurrentHome(pref);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    void buildHomeActivitiesList() {
+        ArrayList<ResolveInfo> homeActivities = new ArrayList<ResolveInfo>();
+        ComponentName currentDefaultHome  = mPm.getHomeActivities(homeActivities);
+
+        Context context = getActivity();
+        mCurrentHome = null;
+        mPrefGroup.removeAll();
+        mPrefs = new ArrayList<HomeAppPreference>();
+        mHomeComponentSet = new ComponentName[homeActivities.size()];
+        int prefIndex = 0;
+        for (int i = 0; i < homeActivities.size(); i++) {
+            final ResolveInfo candidate = homeActivities.get(i);
+            final ActivityInfo info = candidate.activityInfo;
+            ComponentName activityName = new ComponentName(info.packageName, info.name);
+            mHomeComponentSet[i] = activityName;
+            try {
+                Drawable icon = info.loadIcon(mPm);
+                CharSequence name = info.loadLabel(mPm);
+                boolean isSystem = (info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0;
+                HomeAppPreference pref = new HomeAppPreference(context, activityName, prefIndex,
+                        icon, name, this, isSystem);
+                mPrefs.add(pref);
+                mPrefGroup.addPreference(pref);
+                pref.setEnabled(true);
+                if (activityName.equals(currentDefaultHome)) {
+                    mCurrentHome = pref;
+                }
+                prefIndex++;
+            } catch (Exception e) {
+                Log.v(TAG, "Problem dealing with activity " + activityName, e);
+            }
+        }
+
+        if (mCurrentHome != null) {
+            new Handler().post(new Runnable() {
+               public void run() {
+                   mCurrentHome.setChecked(true);
+               }
+            });
+        }
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        addPreferencesFromResource(R.xml.home_selection);
+
+        mPm = getPackageManager();
+        mPrefGroup = (PreferenceGroup) findPreference("home");
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        buildHomeActivitiesList();
+    }
+
+    class HomeAppPreference extends Preference {
+        ComponentName activityName;
+        int index;
+        boolean isSystem;
+        HomeSettings fragment;
+        final ColorFilter grayscaleFilter;
+        boolean isChecked;
+
+        public HomeAppPreference(Context context, ComponentName activity,
+                int i, Drawable icon, CharSequence title,
+                HomeSettings parent, boolean sys) {
+            super(context);
+            setLayoutResource(R.layout.preference_home_app);
+            setIcon(icon);
+            setTitle(title);
+            activityName = activity;
+            fragment = parent;
+            index = i;
+            isSystem = sys;
+
+            ColorMatrix colorMatrix = new ColorMatrix();
+            colorMatrix.setSaturation(0f);
+            float[] matrix = colorMatrix.getArray();
+            matrix[18] = 0.5f;
+            grayscaleFilter = new ColorMatrixColorFilter(colorMatrix);
+        }
+
+        @Override
+        protected void onBindView(View view) {
+            super.onBindView(view);
+
+            RadioButton radio = (RadioButton) view.findViewById(R.id.home_radio);
+            radio.setChecked(isChecked);
+
+            Integer indexObj = new Integer(index);
+
+            ImageView icon = (ImageView) view.findViewById(R.id.home_app_uninstall);
+            if (isSystem) {
+                icon.setEnabled(false);
+                icon.setColorFilter(grayscaleFilter);
+            } else {
+                icon.setOnClickListener(mDeleteClickListener);
+                icon.setTag(indexObj);
+            }
+
+            View v = view.findViewById(R.id.home_app_pref);
+            v.setOnClickListener(mHomeClickListener);
+            v.setTag(indexObj);
+        }
+
+        void setChecked(boolean state) {
+            if (state != isChecked) {
+                isChecked = state;
+                notifyChanged();
+            }
+        }
+    }
+}