OmniGears: make easy to add a checkbox preference

based from Cyanogenmod, but im adding more preferences :D

use SystemCheckBoxPreference if you want adding option for Settings.System
use SecureCheckBoxPreference if you want adding option for Settings.Secure
use GlobalCheckBoxPreference if you want adding option for Settings.Global

example:

we always using like this

    <CheckBoxPreference
        android:key="soft_back_kill_app"
        android:title="@string/soft_back_kill_app_title"
        android:summary="@string/soft_back_kill_app_summary"
        android:persistent="false"/>

and put preference into java code

but with this patch, we can use like this

    <org.omnirom.omnigears.preference.SystemCheckBoxPreference
        android:key="soft_back_kill_app_enable" << put key from android.provider.Settings
        android:title="@string/soft_back_kill_app_title"
        android:summary="@string/soft_back_kill_app_summary" />

the preference will always use presistent command

no need to add this preference into java code again :)
and say goodbye to bad java code style xD

will make all checkbox preference using this, if merged :)

depends on https://gerrit.omnirom.org/#/c/11977/ :)

Change-Id: Ied880d49ccc60c1e02615eccc6d01ddbd30bddf7
(cherry picked from commit bf86799feaebf524c637816e727cc2f9b2932cfb)
diff --git a/src/org/omnirom/omnigears/preference/GlobalCheckBoxPreference.java b/src/org/omnirom/omnigears/preference/GlobalCheckBoxPreference.java
new file mode 100644
index 0000000..0ba460f
--- /dev/null
+++ b/src/org/omnirom/omnigears/preference/GlobalCheckBoxPreference.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2013 The CyanogenMod 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 org.omnirom.omnigears.preference;
+
+import android.content.Context;
+import android.preference.CheckBoxPreference;
+import android.provider.Settings;
+import android.util.AttributeSet;
+
+public class GlobalCheckBoxPreference extends CheckBoxPreference {
+    public GlobalCheckBoxPreference(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public GlobalCheckBoxPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public GlobalCheckBoxPreference(Context context) {
+        super(context, null);
+    }
+
+    @Override
+    protected boolean persistBoolean(boolean value) {
+        if (shouldPersist()) {
+            if (value == getPersistedBoolean(!value)) {
+                // It's already there, so the same as persisting
+                return true;
+            }
+
+            Settings.Global.putInt(getContext().getContentResolver(), getKey(), value ? 1 : 0);
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    protected boolean getPersistedBoolean(boolean defaultReturnValue) {
+        if (!shouldPersist()) {
+            return defaultReturnValue;
+        }
+
+        return Settings.Global.getInt(getContext().getContentResolver(),
+                getKey(), defaultReturnValue ? 1 : 0) != 0;
+    }
+
+    @Override
+    protected boolean isPersisted() {
+        // Using getString instead of getInt so we can simply check for null
+        // instead of catching an exception. (All values are stored as strings.)
+        return Settings.Global.getString(getContext().getContentResolver(), getKey()) != null;
+    }
+}
diff --git a/src/org/omnirom/omnigears/preference/SecureCheckBoxPreference.java b/src/org/omnirom/omnigears/preference/SecureCheckBoxPreference.java
new file mode 100644
index 0000000..8f4e3f9
--- /dev/null
+++ b/src/org/omnirom/omnigears/preference/SecureCheckBoxPreference.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2013 The CyanogenMod 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 org.omnirom.omnigears.preference;
+
+import android.content.Context;
+import android.preference.CheckBoxPreference;
+import android.provider.Settings;
+import android.util.AttributeSet;
+
+public class SecureCheckBoxPreference extends CheckBoxPreference {
+    public SecureCheckBoxPreference(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public SecureCheckBoxPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public SecureCheckBoxPreference(Context context) {
+        super(context, null);
+    }
+
+    @Override
+    protected boolean persistBoolean(boolean value) {
+        if (shouldPersist()) {
+            if (value == getPersistedBoolean(!value)) {
+                // It's already there, so the same as persisting
+                return true;
+            }
+
+            Settings.Secure.putInt(getContext().getContentResolver(), getKey(), value ? 1 : 0);
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    protected boolean getPersistedBoolean(boolean defaultReturnValue) {
+        if (!shouldPersist()) {
+            return defaultReturnValue;
+        }
+
+        return Settings.Secure.getInt(getContext().getContentResolver(),
+                getKey(), defaultReturnValue ? 1 : 0) != 0;
+    }
+
+    @Override
+    protected boolean isPersisted() {
+        // Using getString instead of getInt so we can simply check for null
+        // instead of catching an exception. (All values are stored as strings.)
+        return Settings.Secure.getString(getContext().getContentResolver(), getKey()) != null;
+    }
+}
diff --git a/src/org/omnirom/omnigears/preference/SystemCheckBoxPreference.java b/src/org/omnirom/omnigears/preference/SystemCheckBoxPreference.java
new file mode 100644
index 0000000..8a099e7
--- /dev/null
+++ b/src/org/omnirom/omnigears/preference/SystemCheckBoxPreference.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2013 The CyanogenMod 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 org.omnirom.omnigears.preference;
+
+import android.content.Context;
+import android.preference.CheckBoxPreference;
+import android.provider.Settings;
+import android.util.AttributeSet;
+
+public class SystemCheckBoxPreference extends CheckBoxPreference {
+    public SystemCheckBoxPreference(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public SystemCheckBoxPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public SystemCheckBoxPreference(Context context) {
+        super(context, null);
+    }
+
+    @Override
+    protected boolean persistBoolean(boolean value) {
+        if (shouldPersist()) {
+            if (value == getPersistedBoolean(!value)) {
+                // It's already there, so the same as persisting
+                return true;
+            }
+
+            Settings.System.putInt(getContext().getContentResolver(), getKey(), value ? 1 : 0);
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    protected boolean getPersistedBoolean(boolean defaultReturnValue) {
+        if (!shouldPersist()) {
+            return defaultReturnValue;
+        }
+
+        return Settings.System.getInt(getContext().getContentResolver(),
+                getKey(), defaultReturnValue ? 1 : 0) != 0;
+    }
+
+    @Override
+    protected boolean isPersisted() {
+        // Using getString instead of getInt so we can simply check for null
+        // instead of catching an exception. (All values are stored as strings.)
+        return Settings.System.getString(getContext().getContentResolver(), getKey()) != null;
+    }
+}