Android Create Expansion Panel Basic
1. Project Structure
2. Gradle
plugins {
id 'com.android.application'
}
android {
compileSdkVersion 30
buildToolsVersion "30.0.3"
defaultConfig {
applicationId "com.expansionpanel.basic"
minSdkVersion 19
targetSdkVersion 30
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'com.balysv:material-ripple:1.0.2'
implementation 'androidx.appcompat:appcompat:1.3.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
3. Main Activity
package com.expansionpanel.basic;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.widget.NestedScrollView;
import com.expansionpanel.basic.utils.Tools;
import com.expansionpanel.basic.utils.ViewAnimation;
import com.google.android.material.snackbar.Snackbar;
public class MainActivity extends AppCompatActivity {
private View parent_view;
private NestedScrollView nested_scroll_view;
private ImageButton bt_toggle_text, bt_toggle_input;
private Button bt_hide_text, bt_save_input, bt_hide_input;
private View lyt_expand_text, lyt_expand_input;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_expansion_panel_basic);
parent_view = findViewById(android.R.id.content);
initToolbar();
initComponent();
}
private void initToolbar() {
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setNavigationIcon(R.drawable.ic_menu);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Basic");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Tools.setSystemBarColor(this);
}
private void initComponent() {
// text section
bt_toggle_text = (ImageButton) findViewById(R.id.bt_toggle_text);
bt_hide_text = (Button) findViewById(R.id.bt_hide_text);
lyt_expand_text = (View) findViewById(R.id.lyt_expand_text);
lyt_expand_text.setVisibility(View.GONE);
bt_toggle_text.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
toggleSectionText(bt_toggle_text);
}
});
bt_hide_text.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
toggleSectionText(bt_toggle_text);
}
});
// input section
bt_toggle_input = (ImageButton) findViewById(R.id.bt_toggle_input);
bt_hide_input = (Button) findViewById(R.id.bt_hide_input);
bt_save_input = (Button) findViewById(R.id.bt_save_input);
lyt_expand_input = (View) findViewById(R.id.lyt_expand_input);
lyt_expand_input.setVisibility(View.GONE);
bt_toggle_input.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
toggleSectionInput(bt_toggle_input);
}
});
bt_hide_input.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
toggleSectionInput(bt_toggle_input);
}
});
bt_save_input.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(parent_view, "Data saved", Snackbar.LENGTH_SHORT).show();
toggleSectionInput(bt_toggle_input);
}
});
// nested scrollview
nested_scroll_view = (NestedScrollView) findViewById(R.id.nested_scroll_view);
}
private void toggleSectionText(View view) {
boolean show = toggleArrow(view);
if (show) {
ViewAnimation.expand(lyt_expand_text, new ViewAnimation.AnimListener() {
@Override
public void onFinish() {
Tools.nestedScrollTo(nested_scroll_view, lyt_expand_text);
}
});
} else {
ViewAnimation.collapse(lyt_expand_text);
}
}
private void toggleSectionInput(View view) {
boolean show = toggleArrow(view);
if (show) {
ViewAnimation.expand(lyt_expand_input, new ViewAnimation.AnimListener() {
@Override
public void onFinish() {
Tools.nestedScrollTo(nested_scroll_view, lyt_expand_input);
}
});
} else {
ViewAnimation.collapse(lyt_expand_input);
}
}
public boolean toggleArrow(View view) {
if (view.getRotation() == 0) {
view.animate().setDuration(200).rotation(180);
return true;
} else {
view.animate().setDuration(200).rotation(0);
return false;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_setting, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
finish();
} else {
Toast.makeText(getApplicationContext(), item.getTitle(), Toast.LENGTH_SHORT).show();
}
return super.onOptionsItemSelected(item);
}
}
4. Layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/grey_10"
android:orientation="vertical">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<include layout="@layout/toolbar" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:id="@+id/nested_scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="none"
android:scrollingCache="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="@dimen/spacing_medium">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/spacing_medium"
android:layout_marginLeft="@dimen/spacing_middle"
android:layout_marginRight="@dimen/spacing_middle"
android:layout_marginTop="@dimen/spacing_medium"
android:visibility="visible"
app:cardCornerRadius="2dp"
app:cardElevation="2dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:gravity="center_vertical"
android:minHeight="?android:attr/actionBarSize"
android:orientation="horizontal">
<View
android:layout_width="@dimen/spacing_large"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/textView3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Text"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
android:textColor="@color/grey_80" />
<ImageButton
android:id="@+id/bt_toggle_text"
android:layout_width="?android:attr/actionBarSize"
android:layout_height="?android:attr/actionBarSize"
android:background="?attr/selectableItemBackgroundBorderless"
android:tint="@color/grey_80"
app:srcCompat="@drawable/ic_expand_arrow" />
</LinearLayout>
<LinearLayout
android:id="@+id/lyt_expand_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="@dimen/spacing_large"
android:text="@string/lorem_ipsum" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@color/grey_10" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="end"
android:orientation="horizontal">
<Button
android:id="@+id/bt_hide_text"
style="@style/Widget.AppCompat.Button.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/HIDE" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/spacing_medium"
android:layout_marginLeft="@dimen/spacing_middle"
android:layout_marginRight="@dimen/spacing_middle"
android:layout_marginTop="@dimen/spacing_medium"
android:visibility="visible"
app:cardCornerRadius="2dp"
app:cardElevation="2dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:gravity="center_vertical"
android:minHeight="?android:attr/actionBarSize"
android:orientation="horizontal">
<View
android:layout_width="@dimen/spacing_large"
android:layout_height="wrap_content" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Input"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
android:textColor="@color/grey_80" />
<ImageButton
android:id="@+id/bt_toggle_input"
android:layout_width="?android:attr/actionBarSize"
android:layout_height="?android:attr/actionBarSize"
android:background="?attr/selectableItemBackgroundBorderless"
android:tint="@color/grey_80"
app:srcCompat="@drawable/ic_expand_arrow" />
</LinearLayout>
<LinearLayout
android:id="@+id/lyt_expand_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="@+id/appCompatEditText"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginLeft="@dimen/spacing_large"
android:layout_marginRight="@dimen/spacing_large"
android:layout_marginTop="@dimen/spacing_large"
android:background="@color/grey_5"
android:gravity="center_vertical"
android:hint="Name"
android:padding="@dimen/spacing_middle"
android:textColor="@color/grey_60" />
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/spacing_large"
android:layout_marginTop="@dimen/spacing_medium">
<androidx.appcompat.widget.AppCompatRadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Male" />
<androidx.appcompat.widget.AppCompatRadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Female" />
</RadioGroup>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@color/grey_10" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="end"
android:orientation="horizontal">
<Button
android:id="@+id/bt_hide_input"
style="@style/Widget.AppCompat.Button.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/HIDE" />
<Button
android:id="@+id/bt_save_input"
style="@style/Button.Accent.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/SAVE" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
</LinearLayout>
5. Value
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="grey_3">#f7f7f7</color>
<color name="grey_5">#f2f2f2</color>
<color name="grey_10">#e6e6e6</color>
<color name="grey_20">#cccccc</color>
<color name="grey_40">#999999</color>
<color name="grey_60">#666666</color>
<color name="grey_80">#37474F</color>
<color name="grey_90">#263238</color>
<color name="grey_95">#1a1a1a</color>
<color name="grey_100_">#0d0d0d</color>
</resources>
<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:ns1="urn:oasis:names:tc:xliff:document:1.2">
<style name="TextAppearance.AppCompat.Medium" parent="Base.TextAppearance.AppCompat.Medium"/>
<style name="Widget.AppCompat.Button.Borderless" parent="Base.Widget.AppCompat.Button.Borderless"/>
</resources>
<resources>
<string name="SAVE">SAVE</string>
<string name="HIDE">HIDE</string>
<string name="lorem_ipsum">
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam efficitur ipsum in placerat molestie. Fusce quis mauris a enim sollicitudin
\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam efficitur ipsum in placerat molestie. Fusce quis mauris a enim sollicitudin
</string>
</resources>
