initial commit

Author: ErrorxCode

Collapsible-card/build.gradle

@@ -0,0 +1,21 @@
+plugins {
+    id 'com.android.library'
+}
+
+android {
+    compileSdk 32
+
+    defaultConfig {
+        minSdk 26
+        targetSdk 32
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_16
+        targetCompatibility JavaVersion.VERSION_16
+    }
+}
+
+dependencies {
+    implementation 'androidx.cardview:cardview:1.0.0'
+}

Collapsible-card/src/main/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.errorxcode.card">
+
+</manifest>

Collapsible-card/src/main/java/com/errorxcode/card/CollapsibleCard.java

@@ -0,0 +1,85 @@
+package com.errorxcode.card;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.GradientDrawable;
+import android.transition.AutoTransition;
+import android.transition.TransitionManager;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.RelativeLayout;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+public class CollapsibleCard extends RelativeLayout {
+    private boolean isCollapsed;
+    private AutoTransition transition = new AutoTransition();
+
+    public CollapsibleCard(@NonNull Context context) {
+        super(context);
+        init();
+    }
+
+    public CollapsibleCard(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public CollapsibleCard(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init();
+    }
+
+    private void init(){
+        GradientDrawable drawable = new GradientDrawable();
+        drawable.setCornerRadius(10);
+        drawable.setColor(Color.WHITE);
+        setPadding(10,10,10,10);
+        setBackground(drawable);
+        setElevation(10);
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        var layout = this;
+        for (int i = 0; i < layout.getChildCount(); i++) {
+            var view = layout.getChildAt(i);
+            if ("main".equals(view.getTag()))
+                view.setOnClickListener(v -> {
+                    if (isCollapsed)
+                        expand();
+                    else
+                        collapse();
+                });
+        }
+        collapse();
+    }
+
+    public void collapse() {
+        var layout = this;
+        for (int i = 1; i < layout.getChildCount(); i++) {
+            var view = layout.getChildAt(i);
+            if (!"main".equals(view.getTag())){
+                view.setVisibility(GONE);
+            }
+        }
+        TransitionManager.beginDelayedTransition(this,transition);
+        isCollapsed = true;
+    }
+
+    public void expand() {
+        TransitionManager.beginDelayedTransition(this,transition);
+        var layout = this;
+        for (int i = 1; i < layout.getChildCount(); i++) {
+            layout.getChildAt(i).setVisibility(View.VISIBLE);
+        }
+        isCollapsed = false;
+    }
+
+    public void setCustomTransition(AutoTransition transition) {
+        this.transition = transition;
+    }
+}