launcher: Animated vector describing swipe gesture

Replace the short video with an animated vector image that shows the swipe gesture. This is much lighter and reliable than the mp4 video, which failed to play on many devices. Source for the image of the key is in inkscape SVG format in srcs/res and is converted to an android drawable when needed. The swipe animation is hand-written.
2024-11-18 00:13:08 +01:00 · 2024-11-18 00:13:08 +01:00 · 997b7be4c0
commit 997b7be4c0
parent 23097921cf
10 changed files with 340 additions and 31 deletions
--- a/build.gradle
+++ b/build.gradle
@ -21,7 +21,7 @@ android {
  sourceSets {
    main {
      manifest.srcFile 'AndroidManifest.xml'
-      java.srcDirs = ['srcs']
+      java.srcDirs = ['srcs/juloo.keyboard2']
      res.srcDirs = ['res', 'build/generated-resources']
      assets.srcDirs = ['assets']
    }
--- a/res/drawable/doc_anim_swipe.xml
+++ b/res/drawable/doc_anim_swipe.xml
@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<animated-vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt">
+  <aapt:attr name="android:drawable">
+    <vector android:name="vector" android:width="35dp" android:height="40dp" android:viewportWidth="35" android:viewportHeight="40">
+      <path android:name="trace" android:pathData="M 0 0" android:fillColor="#09b3f1" android:strokeColor="#09b3f1" android:strokeWidth="2" android:strokeLineCap="round"/>
+    </vector>
+  </aapt:attr>
+  <target android:name="trace">
+    <aapt:attr name="android:animation">
+      <set>
+        <objectAnimator android:propertyName="fillAlpha" android:duration="100" android:valueFrom="0" android:valueTo="1" android:valueType="floatType" android:interpolator="@android:interpolator/fast_out_slow_in"/>
+        <objectAnimator android:propertyName="strokeAlpha" android:duration="100" android:valueFrom="0" android:valueTo="1" android:valueType="floatType" android:interpolator="@android:interpolator/fast_out_slow_in"/>
+        <objectAnimator
+          android:propertyName="pathData"
+          android:duration="700"
+          android:valueFrom="M 17.5 20.0 m 2,0 a 2,2 0 1,1 -4,0 a 2,2 0 1,1 4,0 M 17.5 20.0 L 17.5,20.0"
+          android:valueTo="  M 31 4      m 2,0 a 2,2 0 1,1 -4,0 a 2,2 0 1,1 4,0 M 17.5 20.0 L 31  ,4"
+          android:valueType="pathType"
+          android:interpolator="@android:interpolator/linear_out_slow_in"/>
+        <objectAnimator android:propertyName="fillAlpha" android:startOffset="900" android:duration="400" android:valueFrom="1" android:valueTo="0" android:valueType="floatType" android:interpolator="@android:interpolator/linear_out_slow_in"/>
+        <objectAnimator android:propertyName="strokeAlpha" android:startOffset="900" android:duration="400" android:valueFrom="1" android:valueTo="0" android:valueType="floatType" android:interpolator="@android:interpolator/linear_out_slow_in"/>
+      </set>
+    </aapt:attr>
+  </target>
+</animated-vector>
--- a/res/drawable/doc_key_u.xml
+++ b/res/drawable/doc_key_u.xml
@ -0,0 +1,25 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="35dp"
+        android:height="40dp"
+        android:viewportWidth="35.0"
+        android:viewportHeight="40.0">
+    <path
+        android:pathData="M11.26,10.13L23.74,10.13A1.13,1.13 0,0 1,24.87 11.26L24.87,28.74A1.13,1.13 0,0 1,23.74 29.88L11.26,29.88A1.13,1.13 0,0 1,10.13 28.74L10.13,11.26A1.13,1.13 0,0 1,11.26 10.13z"
+        android:fillAlpha="1"
+        android:strokeColor="#404040"
+        android:fillColor="#333333"
+        android:strokeWidth="0.251"
+        android:strokeAlpha="1"/>
+    <path
+        android:pathData="m16.64,17.64l0,3.21q0,0.41 0.16,0.58 0.17,0.17 0.5,0.17 0.31,0 0.61,-0.19 0.29,-0.19 0.46,-0.46l0,-3.33l0.98,0l0,4.6l-0.84,0l-0.06,-0.59q-0.26,0.34 -0.65,0.53 -0.39,0.18 -0.8,0.18 -0.67,0 -1,-0.37 -0.33,-0.37 -0.33,-1.01l0,-3.33z"
+        android:fillColor="#fdfdfd"
+        android:strokeWidth="0.265729"/>
+    <path
+        android:pathData="m12.52,24.71q0.3,0 0.54,0.09 0.25,0.09 0.49,0.35l-0.37,0.33q-0.14,-0.16 -0.28,-0.23 -0.14,-0.08 -0.34,-0.08 -0.27,0 -0.41,0.15 -0.14,0.15 -0.14,0.39 0,0.17 0.08,0.31 0.08,0.14 0.23,0.22 0.15,0.08 0.33,0.08l1.58,0l0,0.46l-0.47,0l0,1.56q-0.1,0.12 -0.26,0.24 -0.16,0.12 -0.41,0.21 -0.24,0.08 -0.58,0.08 -0.45,0 -0.75,-0.17 -0.3,-0.17 -0.44,-0.45 -0.15,-0.28 -0.15,-0.6 0,-0.46 0.24,-0.74 0.24,-0.28 0.66,-0.37l0,-0.02q-0.25,-0.06 -0.4,-0.18 -0.15,-0.12 -0.22,-0.3 -0.07,-0.17 -0.07,-0.37 0,-0.26 0.14,-0.48 0.14,-0.22 0.4,-0.35 0.26,-0.13 0.6,-0.13zM13.18,26.79l-0.58,0q-0.28,0 -0.45,0.12 -0.17,0.12 -0.26,0.32 -0.08,0.19 -0.08,0.39 0,0.2 0.08,0.37 0.08,0.17 0.24,0.28 0.16,0.1 0.42,0.1 0.21,0 0.37,-0.07 0.16,-0.07 0.26,-0.19z"
+        android:fillColor="#cccccc"
+        android:strokeWidth="0.265729"/>
+    <path
+        android:pathData="m22.12,15.25 l-0.61,-0.19 1.54,-3.37l-1.84,0l0,-0.51l2.49,0l0,0.47z"
+        android:fillColor="#cccccc"
+        android:strokeWidth="0.265729"/>
+</vector>
--- a/res/layout/launcher_activity.xml
+++ b/res/layout/launcher_activity.xml
@ -4,7 +4,7 @@
    <TextView style="@style/paragraph" android:text="@string/launcher_description"/>
    <Button style="@style/paragraph" android:text="@string/launcher_button_imesettings" android:onClick="launch_imesettings" android:layout_width="wrap_content"/>
    <Button style="@style/paragraph" android:text="@string/launcher_button_imepicker" android:onClick="launch_imepicker" android:layout_width="wrap_content"/>
-    <VideoView android:id="@+id/launcher_intro_video" android:layout_width="240dp" android:layout_height="wrap_content" android:layout_gravity="center"/>
+    <ImageView style="@style/anim" android:id="@+id/launcher_anim_swipe" android:background="@drawable/doc_key_u" android:src="@drawable/doc_anim_swipe"/>
    <TextView android:id="@+id/launcher_tryhere_text" style="@style/paragraph" android:text="@string/launcher_tryhere"/>
    <EditText android:id="@+id/launcher_tryhere_area" style="@style/paragraph" android:inputType="text" android:hint="@string/launcher_tryhere_hint" android:importantForAutofill="no"/>
    <TextView style="@style/paragraph" android:text="@string/launcher_sourcecode"/>
--- a/res/raw/intro_video.mp4
+++ b/res/raw/intro_video.mp4
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@ -56,5 +56,12 @@
    <item name="android:layout_marginHorizontal">16dp</item>
    <item name="android:layout_gravity">center</item>
  </style>
+  <style name="anim">
+    <item name="android:layout_width">100dp</item>
+    <item name="android:layout_height">wrap_content</item>
+    <item name="android:layout_marginVertical">16dp</item>
+    <item name="android:layout_gravity">center</item>
+    <item name="android:adjustViewBounds">true</item>
+  </style>
  <style name="appTheme" parent="@android:style/Theme.DeviceDefault.DayNight"/>
 </resources>
--- a/srcs/juloo.keyboard2/LauncherActivity.java
+++ b/srcs/juloo.keyboard2/LauncherActivity.java
@ -3,11 +3,14 @@ package juloo.keyboard2;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Intent;
+import android.graphics.drawable.Animatable;
 import android.media.AudioManager;
 import android.media.MediaPlayer;
 import android.net.Uri;
 import android.os.Build.VERSION;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
 import android.provider.Settings;
 import android.view.KeyEvent;
 import android.view.Menu;
@ -15,28 +18,49 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
+import android.widget.ImageView;
 import android.widget.TextView;
-import android.widget.VideoView;
+import java.util.ArrayList;
+import java.util.List;

-public class LauncherActivity extends Activity
+public class LauncherActivity extends Activity implements Handler.Callback
 {
  /** Text is replaced when receiving key events. */
-  VideoView _intro_video;
  TextView _tryhere_text;
  EditText _tryhere_area;
+  /** Periodically restart the animations. */
+  List<Animatable> _animations;
+  Handler _handler;

  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.launcher_activity);
-    _intro_video = (VideoView)findViewById(R.id.launcher_intro_video);
    _tryhere_text = (TextView)findViewById(R.id.launcher_tryhere_text);
    _tryhere_area = (EditText)findViewById(R.id.launcher_tryhere_area);
    if (VERSION.SDK_INT >= 28)
      _tryhere_area.addOnUnhandledKeyEventListener(
          this.new Tryhere_OnUnhandledKeyEventListener());
-    setup_intro_video(_intro_video);
+  }
+
+  @Override
+  public void onStart()
+  {
+    super.onStart();
+    _animations = new ArrayList<Animatable>();
+    _animations.add(find_anim(R.id.launcher_anim_swipe));
+    _handler = new Handler(getMainLooper(), this);
+    _handler.sendEmptyMessageDelayed(0, 500);
+  }
+
+  @Override
+  public boolean handleMessage(Message _msg)
+  {
+    for (Animatable anim : _animations)
+      anim.start();
+    _handler.sendEmptyMessageDelayed(0, 3000);
+    return true;
  }

  @Override
@ -70,31 +94,10 @@ public class LauncherActivity extends Activity
    imm.showInputMethodPicker();
  }

-  static void setup_intro_video(final VideoView v)
+  Animatable find_anim(int id)
  {
-    if (VERSION.SDK_INT >= 26)
-      v.setAudioFocusRequest(AudioManager.AUDIOFOCUS_NONE);
-    v.setVideoURI(Uri.parse("android.resource://" +
-          v.getContext().getPackageName() + "/" + R.raw.intro_video));
-    v.setOnPreparedListener(new MediaPlayer.OnPreparedListener()
-        {
-          @Override
-          public void onPrepared(MediaPlayer mp)
-          {
-            mp.setLooping(true);
-          }
-        });
-    v.setOnErrorListener(new MediaPlayer.OnErrorListener()
-        {
-          @Override
-          public boolean onError(MediaPlayer mp, int what, int extra)
-          {
-            v.stopPlayback();
-            v.setVisibility(View.GONE);
-            return true;
-          }
-        });
-    v.start();
+    ImageView img = (ImageView)findViewById(id);
+    return (Animatable)img.getDrawable();
  }

  @TargetApi(28)
--- a/srcs/res/SvgToVector.java
+++ b/srcs/res/SvgToVector.java
@ -0,0 +1,32 @@
+package srcs.res;
+
+import com.android.ide.common.vectordrawable.Svg2Vector;
+import java.io.File;
+import java.io.FileOutputStream;
+
+/** Inspired from Bernard Ladenthin's answer:
+    https://stackoverflow.com/a/78898372 */
+public class SvgToVector
+{
+  public static void main(String[] args)
+  {
+    if (args.length != 2)
+    {
+      System.out.println("Usage: svg_to_vector <input_file> <output_file>");
+      return;
+    }
+    try
+    {
+      File input_file = new File(args[0]);
+      FileOutputStream output_stream = new FileOutputStream(args[1]);
+      String warnings;
+      warnings = Svg2Vector.parseSvgToXml(input_file, output_stream);
+      System.err.println(warnings);
+    }
+    catch (Exception e)
+    {
+      e.printStackTrace();
+      System.exit(2);
+    }
+  }
+}
--- a/srcs/res/doc_key.svg
+++ b/srcs/res/doc_key.svg
@ -0,0 +1,192 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="35mm"
+   height="40mm"
+   viewBox="0 0 35 40"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.3.2 (091e20ef0f, 2023-11-25)"
+   sodipodi:docname="doc_key.svg"
+   inkscape:export-filename="key_u.svg"
+   inkscape:export-xdpi="96"
+   inkscape:export-ydpi="96"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#1b1b1b"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#1b1b1b"
+     inkscape:document-units="mm"
+     inkscape:zoom="4.6038101"
+     inkscape:cx="160.95364"
+     inkscape:cy="75.69817"
+     inkscape:window-width="2560"
+     inkscape:window-height="1440"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer2">
+    <inkscape:page
+       x="0"
+       y="0"
+       width="35"
+       height="40"
+       id="page1"
+       margin="0"
+       bleed="0"
+       inkscape:label="g" />
+    <inkscape:page
+       x="45"
+       y="0"
+       width="35"
+       height="40"
+       id="page2"
+       margin="0"
+       bleed="0"
+       inkscape:label="u" />
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+  <defs
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+     inkscape:groupmode="layer"
+     id="layer2"
+     inkscape:label="U"
+     style="display:inline">
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+       inkscape:label="Background"
+       inkscape:groupmode="layer"
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+       style="display:inline"
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+         sodipodi:role="line"
+         id="tspan5-9"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;fill:#cccccc;fill-opacity:1;stroke-width:0.265729"
+         x="20.691027"
+         y="15.147132">-</tspan></text>
+  </g>
+</svg>
--- a/srcs/res/gen_doc_key_drawables.sh
+++ b/srcs/res/gen_doc_key_drawables.sh
@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+set -e
+cd "$(dirname $0)"
+
+DRAWABLE_DIR=../../res/drawable
+ANDROID_LIB=$ANDROID_SDK_ROOT/tools/lib
+
+first () { echo "$1"; }
+JAVA_ARGS=(
+  -classpath
+  "$(first $ANDROID_LIB/sdk-common-*.jar):$(first $ANDROID_LIB/common-*.jar)"
+)
+svg_to_vector ()
+{
+  java "${JAVA_ARGS[@]}" SvgToVector.java "$@"
+}
+
+TMP=`mktemp -d`
+trap "rm -r '$TMP'" EXIT
+set -x
+
+inkscape doc_key.svg -o "$TMP/doc_key_u.svg" -C --export-page 2 --export-plain-svg --export-text-to-path
+
+svg_to_vector "$TMP/doc_key_u.svg" "$DRAWABLE_DIR/doc_key_u.xml"