Added a seek bar for the Saturation

app/build.gradle

@@ -24,8 +24,9 @@ dependencies {
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:25.3.0'
-    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+    compile 'com.android.support:appcompat-v7:25.3.1'
     testCompile 'junit:junit:4.12'
     compile 'com.github.bumptech.glide:glide:3.7.0'
+    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+
 }

app/src/main/java/com/teamtreehouse/colorizer/MainActivity.java

@@ -5,35 +5,41 @@
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.widget.ImageView;
+import android.widget.SeekBar;
 
 import com.bumptech.glide.Glide;
 
 public class MainActivity extends AppCompatActivity {
-    ImageView imageView;
-    int[] imageResIds = {R.drawable.cuba1, R.drawable.cuba2, R.drawable.cuba3};
-    int imageIndex = 0;
-    boolean color = true;
-    boolean red = true;
-    boolean green = true;
-    boolean blue = true;
+    private ImageView imageView;
+    private SeekBar saturationSeekBar;
+    private int[] imageResIds = {R.drawable.cuba1, R.drawable.cuba2, R.drawable.cuba3};
+    private int imageIndex = 0;
+    private boolean color = true;
+    private boolean red = true;
+    private boolean green = true;
+    private boolean blue = true;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         imageView = (ImageView)findViewById(R.id.imageView);
+        saturationSeekBar = (SeekBar)findViewById(R.id.saturationSeekBar);
+
+        saturationSeekBar.setOnSeekBarChangeListener(saturationSeekBarListener);
+
         loadImage();
     }
 
     private void loadImage() {
         Glide.with(this).load(imageResIds[imageIndex]).into(imageView);
     }
 
-    private void updateSaturation() {
+    private void updateSaturation(int saturation) {
         ColorMatrix colorMatrix = new ColorMatrix();
         if (color) {
             red = green = blue = true;
-            colorMatrix.setSaturation(1);
+            colorMatrix.setSaturation(saturation);
         } else {
             colorMatrix.setSaturation(0);
         }
@@ -56,4 +62,22 @@ private void updateColors() {
         ColorMatrixColorFilter colorFilter = new ColorMatrixColorFilter(colorMatrix);
         imageView.setColorFilter(colorFilter);
     }
+
+    /*Add a SeekBar for saturation*/
+    private final SeekBar.OnSeekBarChangeListener saturationSeekBarListener = new SeekBar.OnSeekBarChangeListener() {
+        @Override
+        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+            updateSaturation(progress);
+        }
+
+        @Override
+        public void onStartTrackingTouch(SeekBar seekBar) {
+
+        }
+
+        @Override
+        public void onStopTrackingTouch(SeekBar seekBar) {
+
+        }
+    };
 }

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

@@ -16,4 +16,18 @@
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent"/>
 
+    <SeekBar
+        android:id="@+id/saturationSeekBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        android:layout_marginBottom="8dp"
+        android:layout_marginTop="8dp"
+        app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
 </android.support.constraint.ConstraintLayout>