preview with callback

app/build.gradle

@@ -3,13 +3,14 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
+    namespace "com.mrudultora.colorpickerapp"
+    compileSdk 36
     buildToolsVersion "30.0.2"
 
     defaultConfig {
         applicationId "com.mrudultora.colorpickerapp"
         minSdkVersion 21
-        targetSdkVersion 30
+        targetSdkVersion 36
         versionCode 1
         versionName "1.0"
 
@@ -26,11 +27,11 @@ android {
 
 dependencies {
 
-    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'com.google.android.material:material:1.3.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.appcompat:appcompat:1.7.1'
+    implementation 'com.google.android.material:material:1.12.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.2.1'
     implementation project(path: ':colorpicker')
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.3.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.7.0'
 }

app/src/main/AndroidManifest.xml

@@ -9,7 +9,8 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.ColorpickerApp">
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

build.gradle

@@ -1,11 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
+
 buildscript {
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:4.1.1"
+        classpath "com.android.tools.build:gradle:8.10.0"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

colorpicker/build.gradle

@@ -3,14 +3,15 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
+    namespace "com.mrudultora.colorpicker"
+    compileSdkVersion 36
     buildToolsVersion "30.0.2"
 
     defaultConfig {
         minSdkVersion 21
-        targetSdkVersion 30
-        versionCode 1
-        versionName "1.0"
+        targetSdkVersion 35
+        versionCode 2
+        versionName "1.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles "consumer-rules.pro"
@@ -25,9 +26,9 @@ android {
 }
 
 dependencies {
-    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.appcompat:appcompat:1.7.1'
+    implementation 'com.google.android.material:material:1.12.0'
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.3.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.7.0'
 }

colorpicker/src/main/java/com/mrudultora/colorpicker/ColorPickerPopUp.java

@@ -65,6 +65,7 @@ public class ColorPickerPopUp extends View implements ViewTreeObserver.OnGlobalL
     private int selectedColor = Integer.MAX_VALUE;
     private int alpha = 255;
     private float[] currentColorsHSV = new float[]{1f, 1f, 1f};
+    private IPreviewCallback previewCallback;
 
     public interface OnPickColorListener {
         void onColorPicked(int color);
@@ -178,7 +179,9 @@ public boolean onTouch(View view, MotionEvent motionEvent) {
             setSaturation(1f / colorPickerView.getMeasuredWidth() * x);
             setValue(1f - (1f / colorPickerView.getMeasuredHeight() * y));
             moveCursorColorPicker();
+            int color = getCurrentColor();
             viewNewColor.setBackgroundColor(getCurrentColor());
+            preview(color);
             return true;
         } else if (hueImageView != null && view == hueImageView && isRequiredMotionEvent(motionEvent)) {
             float y = motionEvent.getY();
@@ -195,7 +198,9 @@ public boolean onTouch(View view, MotionEvent motionEvent) {
             setHue(hue);
 
             colorPickerView.setHue(getHue());
+            int color = getCurrentColor();
             viewNewColor.setBackgroundColor(getCurrentColor());
+            preview(color);
             moveCursorHue();
             updateAlphaOverlay();
             return true;
@@ -213,6 +218,7 @@ public boolean onTouch(View view, MotionEvent motionEvent) {
             selectedColor = this.alpha << 24 | getCurrentColor() & 0x00FFFFFF;
             moveCursorAlpha();
             viewNewColor.setBackgroundColor(selectedColor);
+            preview(selectedColor);
             return true;
         }
         return false;
@@ -407,6 +413,20 @@ public ColorPickerPopUp setOnPickColorListener(OnPickColorListener onPickColorLi
         return this;
     }
 
+    /**
+     * A callback which can do stuff, like preview the color in the real object
+     * @param previewCallback
+     */
+    public ColorPickerPopUp setPreviewCallback(IPreviewCallback previewCallback) {
+        this.previewCallback = previewCallback;
+        return this;
+    }
+
+    private void preview(int color) {
+        if (previewCallback != null) {
+            previewCallback.preview(color);
+        }
+    }
     /**
      * Sets whether to show Alpha Channel or not.
      * Default value is true.

colorpicker/src/main/java/com/mrudultora/colorpicker/IPreviewCallback.java

@@ -0,0 +1,15 @@
+package com.mrudultora.colorpicker;
+
+/**
+ * Interface which marks a preview callback.
+ * The callback can do much more than preview,
+ * but its main purpose is to actually show a preview
+ * of the object to be colored on the screen.
+ */
+public interface IPreviewCallback {
+    /**
+     * callback method.
+     * @param selectedColor
+     */
+    void preview(int selectedColor);
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Apr 29 20:58:56 IST 2021
+#Sun Aug 10 09:43:21 EEST 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip