Tween animation examples

1. View Animations in android dependent on android.view.animation can be used to animate Views in android.

2. The animation can be applied to Views (ImageView, TextView, etc.).

3. XML files for the animation are placed in res/anim/ folder.

4. The root tags for the XML file include:

  • <alpha> (fade in/out)
  • <scale> (zoom)
  • <translate> (move)
  • <rotate> (rotate)
  • <set> (combine multiple animations)
5. Below are examples of each of them:

a) res/anim/fade_in.xml

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromAlpha="0.0"
    android:toAlpha="1.0"
    android:duration="1000" />
b) res/anim/fade_out.xml

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromAlpha="1.0"
    android:toAlpha="0.0"
    android:duration="1000" />
c) res/anim/move_up.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromYDelta="100%"
    android:toYDelta="0%"
    android:duration="1000" />
d) res/anim/move_down.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromYDelta="-100%"
    android:toYDelta="0%"
    android:duration="1000" />
e) res/anim/move_right.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromXDelta="0%"
    android:toXDelta="100%"
    android:fromYDelta="0%"
    android:toYDelta="0%"
    android:duration="1000" />
f) res/anim/move_left.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromXDelta="0%"
    android:toXDelta="-100%"
    android:fromYDelta="0%"
    android:toYDelta="0%"
    android:duration="1000" />
g) res/anim/zoom_in.xml

<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromXScale="0.5"
    android:toXScale="1.0"
    android:fromYScale="0.5"
    android:toYScale="1.0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:duration="800" />
h) res/anim/zoom_out.xml

<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromXScale="1.0"
    android:toXScale="0.5"
    android:fromYScale="1.0"
    android:toYScale="0.5"
    android:pivotX="50%"
    android:pivotY="50%"
    android:duration="800" />
i) res/anim/rotate.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="0"
    android:toDegrees="360"
    android:pivotX="50%"
    android:pivotY="50%"
    android:duration="1200"
    android:repeatCount="infinite" />
j) res/anim/set_animations.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator">

    <scale
        android:fromXScale="0.5"
        android:toXScale="1.0"
        android:fromYScale="0.5"
        android:toYScale="1.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="700" />

    <rotate
        android:fromDegrees="0"
        android:toDegrees="360"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="700" />

    <alpha
        android:fromAlpha="0.0"
        android:toAlpha="1.0"
        android:duration="700" />

</set>

6. To use the animation xml file to animate an object, use codes in onCreate. The following code animates an ImageView imageview1 with fade_in animation.


Animation anim = AnimationUtils.loadAnimation(context, R.anim.fade_in);
binding.imageview1.startAnimation(anim);

7. Modify the animation files as per requirement and use them for any View in your Activity.


Comments

Post a Comment

Popular posts from this blog

Simple car racing android game in Sketchware

Image
To create a simple car racing game in sketchware follow the steps given below. 1. Create a new project in Sketchware. 2. In VIEW area of main.xml add a TextView textview3 for displaying score of previous game, a TextView textview4 for displaying high score, and a Button button1 for starting game. 3. In MainActivity , add a Shared Preferences component sp:sp . 4. Add onStart event and put blocks to set the text of textview3 and textview4 . 5. Create a new page page2.xml . 6. On button1 click use intent to move to page2 . 7. On page2.xml add a LinearV linear1 with padding 0 and width and height MATCH_PARENT. 8. In Page2Activity , add a Shared Preferences component sp:sp . 9. Create a number variable highscore . 10. In onCreate event of Page2Activity , use blocks to set the value of number variable highscore , and use codes to create a new GameView and add it to linear1 , as shown in image below. The code used in the add source directly bloc...
Read more

How to enable upload from webview in Sketchware?

Image
Now that Sketchware has a block to add java code directly in the project, it is possible to enable file upload in webview. To enable file upload in webview in sketchware app, follow the steps given below. 1. Insert a webview in VIEW area in the sketchware project. Note the ID of webview, usually it is webview1 . 2. In LOGIC area of project, in onCreate event, add the block add source directly and copy the following code in it: webview1.setWebChromeClient(new WebChromeClient() { // For 3.0+ Devices protected void openFileChooser(ValueCallback uploadMsg, String acceptType) { mUploadMessage = uploadMsg; Intent i = new Intent(Intent.ACTION_GET_CONTENT); i.addCategory(Intent.CATEGORY_OPENABLE); i.setType("image/*"); startActivityForResult(Intent.createChooser(i, "File Browser"), FILECHOOSER_RESULTCODE); } // For Lollipop 5.0+ Devices public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChoose...
Read more

Simple Audio recorder app in Sketchware

Image
1.  Switch on AppCompat and Design. 2. In main.xml,  add two Buttons startBtn and stopBtn , and add two TextViews textview_message and textview_file . 3. Add a SpeechToText component (To add record audio permissions). 4. Add a String variable outputFile and add a custom variable of type MediaRecorder with name mediaRecorder . 5. In onCreate , add write string__to file path__ block  (To add read and write external storage permissions). Then put following codes to define outputFile. stopBtn.setEnabled(false); File downloadsDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS); String fileName = "recording_" + System.currentTimeMillis() + ".3gp"; File file = new File(downloadsDir, fileName); outputFile = file.getAbsolutePath(); 6. Create a More block startRecording and put following codes in it. try { mediaRecorder = new MediaRecorder(); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); ...
Read more

Retrieve contact list in Sketchware

Image
 To read contact list in Sketchware pro, follow the steps given below. 1. In the Sketchware project, in main.xml, add a ListView. Also add a custom view for ListView items. For the ListView, select the custom view. 2. Switch on AppCompat and design. 3. In permission manager, select android.permission.READ_CONTACTS . 4. In Activity, add Import event. Put following codes in the import event: import android.Manifest; import android.content.pm.PackageManager; import android.database.Cursor; import android.provider.ContactsContract; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; 5. Create a more block getAllContacts of type List Map. In this more block, put following codes: ArrayList<HashMap<String, Object>> contactList = new ArrayList<>(); ContentResolver contentResolver = MainActivity.this.getContentResolver(); Cursor cursor = contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, ...
Read more

Custom dialog box in Sketchware using CustomView

Image
The CustomView can be used to create a custom dialog box in Sketchware, by using simple codes. Follow the steps below to create a custom dialog pop-up. 1. In VIEW area of your project add a new CustomView . In the image above I have added a new CustomView 'cust.xml'. 2. Design the CustomView the way you want your custom dialog box to look like. In the image above, I have added an ImageView, two TextViews, and two Buttons (namely 'button1' and 'button2'). 3. Choose the event on which you want to show the dialog. It can be onBackPressed or onButtonClick, etc. 4. On the event when dialog is to be shown, use add source directly block to create and show the dialog box. In the image above I have added the code to onBackPressed event. The code used is explained below. a) First use the code to create a dialog. final AlertDialog dialog2 = new AlertDialog.Builder( MainActivity .this).create(); Note that here 'MainActivity' is the nam...
Read more