Implement about screen

app/src/main/java/org/isoron/uhabits/AboutActivity.java

@@ -0,0 +1,93 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied  warranty of MERCHANTABILITY or
+ * FITNESS  FOR  A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You  should  have  received  a  copy  of the GNU General Public License
+ * along  with  this  program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.net.Uri;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.TextView;
+
+import org.isoron.helpers.ColorHelper;
+
+public class AboutActivity extends Activity implements View.OnClickListener
+{
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.about);
+
+        if (android.os.Build.VERSION.SDK_INT >= 21)
+        {
+            int color = getResources().getColor(R.color.blue_700);
+            int darkerColor = ColorHelper.mixColors(color, Color.BLACK, 0.75f);
+            getActionBar().setBackgroundDrawable(new ColorDrawable(color));
+            getWindow().setStatusBarColor(darkerColor);
+        }
+
+        TextView tvVersion = (TextView) findViewById(R.id.tvVersion);
+        TextView tvRate = (TextView) findViewById(R.id.tvRate);
+        TextView tvFeedback = (TextView) findViewById(R.id.tvFeedback);
+        TextView tvSource = (TextView) findViewById(R.id.tvSource);
+
+        tvVersion.setText(String.format("%s %s", getResources().getString(R.string.version),
+                BuildConfig.VERSION_NAME));
+        tvRate.setOnClickListener(this);
+        tvFeedback.setOnClickListener(this);
+        tvSource.setOnClickListener(this);
+    }
+
+    @Override
+    public void onClick(View v)
+    {
+        switch (v.getId())
+        {
+            case R.id.tvRate:
+            {
+                Intent intent = new Intent();
+                intent.setAction(Intent.ACTION_VIEW);
+                intent.setData(Uri.parse("market://details?id=org.isoron.uhabits"));
+                startActivity(intent);
+                break;
+            }
+
+            case R.id.tvFeedback:
+            {
+                Intent intent = new Intent();
+                intent.setAction(Intent.ACTION_SENDTO);
+                intent.setData(Uri.parse("mailto:isoron+habits@gmail.com?" +
+                                "subject=Feedback%20about%20Loop%20Habit%20Tracker"));
+                startActivity(intent);
+                break;
+            }
+
+            case R.id.tvSource:
+            {
+                Intent intent = new Intent();
+                intent.setAction(Intent.ACTION_VIEW);
+                intent.setData(Uri.parse("https://github.com/iSoron/uhabits"));
+                startActivity(intent);
+                break;
+            }
+        }
+    }
+}

app/src/main/java/org/isoron/uhabits/MainActivity.java

@@ -117,9 +117,18 @@ public class MainActivity extends ReplayableActivity
         switch (item.getItemId())
         {
             case R.id.action_settings:
+            {
                 Intent intent = new Intent(this, SettingsActivity.class);
                 startActivity(intent);
                 return true;
+            }
+
+            case R.id.action_about:
+            {
+                Intent intent = new Intent(this, AboutActivity.class);
+                startActivity(intent);
+                return true;
+            }
 
             default:
                 return super.onOptionsItemSelected(item);