Add sign out

app/src/main/java/com/hippo/ehviewer/preference/SignOutPreference.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * 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.hippo.ehviewer.preference;
+
+import android.content.Context;
+import android.support.v7.app.AlertDialog;
+import android.util.AttributeSet;
+import android.widget.Toast;
+
+import com.hippo.ehviewer.R;
+import com.hippo.ehviewer.client.EhUtils;
+import com.hippo.preference.MessagePreference;
+
+public class SignOutPreference extends MessagePreference {
+
+    public SignOutPreference(Context context) {
+        super(context);
+        init();
+    }
+
+    public SignOutPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public SignOutPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init();
+    }
+
+    public SignOutPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        init();
+    }
+
+    private void init() {
+        setDialogMessage(getContext().getString(R.string.settings_eh_sign_out_warning));
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
+        super.onPrepareDialogBuilder(builder);
+        builder.setPositiveButton(R.string.settings_eh_sign_out_yes, this);
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+        if (positiveResult) {
+            EhUtils.signOut(getContext());
+            Toast.makeText(getContext(), R.string.settings_eh_sign_out_tip, Toast.LENGTH_SHORT).show();
+        }
+    }
+}