make Focus Before Capture optional, disabled by default

app/src/main/java/com/simplemobiletools/camera/Config.java

@@ -21,4 +21,12 @@ public class Config {
     public void setLongTapEnabled(boolean enabled) {
         prefs.edit().putBoolean(Constants.LONG_TAP, enabled).apply();
     }
+
+    public boolean getFocusBeforeCaptureEnabled() {
+        return prefs.getBoolean(Constants.FOCUS_BEFORE_CAPTURE, false);
+    }
+
+    public void setFocusBeforeCaptureEnabled(boolean enabled) {
+        prefs.edit().putBoolean(Constants.FOCUS_BEFORE_CAPTURE, enabled).apply();
+    }
 }

app/src/main/java/com/simplemobiletools/camera/Constants.java

@@ -8,4 +8,5 @@ public class Constants {
     // Shared preferences
     public static final String PREFS_KEY = "Camera";
     public static final String LONG_TAP = "long_tap";
+    public static final String FOCUS_BEFORE_CAPTURE = "focus_before_capture";
 }

app/src/main/java/com/simplemobiletools/camera/Preview.java

@@ -48,6 +48,7 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
     private static boolean isSurfaceCreated;
     private static boolean switchToVideoAsap;
     private static boolean isVideoCaptureIntent;
+    private static boolean focusBeforeCapture;
     private boolean setupPreviewAfterMeasure;
     private static String curVideoPath;
     private static int lastClickX;
@@ -145,6 +146,8 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
         final boolean isLongTapEnabled = Config.newInstance(getContext()).getLongTapEnabled();
         surfaceView.setOnLongClickListener(isLongTapEnabled ? this : null);
 
+        focusBeforeCapture = Config.newInstance(getContext()).getFocusBeforeCaptureEnabled();
+
         return true;
     }
 
@@ -194,7 +197,11 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
     }
 
     public void tryTakePicture() {
-        focusArea(true);
+        if (focusBeforeCapture) {
+            focusArea(true);
+        } else {
+            takePicture();
+        }
     }
 
     private void takePicture() {

app/src/main/java/com/simplemobiletools/camera/SettingsActivity.java

@@ -10,6 +10,7 @@ import butterknife.OnClick;
 
 public class SettingsActivity extends AppCompatActivity {
     @BindView(R.id.settings_long_tap) SwitchCompat longTapSwitch;
+    @BindView(R.id.settings_focus_before_capture) SwitchCompat focusBeforeCaptureSwitch;
 
     private static Config mConfig;
 
@@ -19,16 +20,28 @@ public class SettingsActivity extends AppCompatActivity {
         setContentView(R.layout.activity_settings);
         mConfig = Config.newInstance(getApplicationContext());
         ButterKnife.bind(this);
+
         setupLongTap();
+        setupFocusBeforeCapture();
     }
 
     private void setupLongTap() {
         longTapSwitch.setChecked(mConfig.getLongTapEnabled());
     }
 
+    private void setupFocusBeforeCapture() {
+        focusBeforeCaptureSwitch.setChecked(mConfig.getFocusBeforeCaptureEnabled());
+    }
+
     @OnClick(R.id.settings_long_tap_holder)
     public void handleLongTapToTrigger() {
         longTapSwitch.setChecked(!longTapSwitch.isChecked());
         mConfig.setLongTapEnabled(longTapSwitch.isChecked());
     }
+
+    @OnClick(R.id.settings_focus_before_capture_holder)
+    public void handleFocusBeforeCapture() {
+        focusBeforeCaptureSwitch.setChecked(!focusBeforeCaptureSwitch.isChecked());
+        mConfig.setFocusBeforeCaptureEnabled(focusBeforeCaptureSwitch.isChecked());
+    }
 }

app/src/main/res/layout/activity_settings.xml

@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
+<LinearLayout
     android:id="@+id/settings_holder"
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
 
     <RelativeLayout
         android:id="@+id/settings_long_tap_holder"
@@ -30,4 +31,30 @@
             android:clickable="false"/>
 
     </RelativeLayout>
-</RelativeLayout>
+
+    <RelativeLayout
+        android:id="@+id/settings_focus_before_capture_holder"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="@dimen/settings_padding"
+        android:background="?android:attr/selectableItemBackground"
+        android:padding="@dimen/activity_margin">
+
+        <TextView
+            android:id="@+id/settings_focus_before_capture_label"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
+            android:paddingLeft="@dimen/settings_padding"
+            android:text="@string/focus_before_capture"/>
+
+        <android.support.v7.widget.SwitchCompat
+            android:id="@+id/settings_focus_before_capture"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentRight="true"
+            android:background="@null"
+            android:clickable="false"/>
+
+    </RelativeLayout>
+</LinearLayout>

app/src/main/res/values/strings.xml

@@ -15,6 +15,7 @@
     <!-- Settings -->
     <string name="settings">Settings</string>
     <string name="long_tap_capture">Long tap to capture</string>
+    <string name="focus_before_capture">Focus before capture</string>
 
     <!-- About -->
     <string name="about">About</string>