CODEWITHSUNDEEP
androidandroid-animationtranslate-animation
Dhrumil Patel
Dhrumil Patel

Reputation: 554

Android: animate a view with setY()

I want to animate a simple view, say for example a simple textview. I want to use translate animate the view.

Now what my requirement is, I want to make a method, say for example slide(View v, float position). Which will take the view to animate and position till where it should be animated. And I will call that method from desired place in my code.

To accomplish this, I have tried something. I have made MyTranslateAnimation class as follow.

public class MyTranslateAnimation extends Animation {

private View mView;
private final float position;

public MyTranslateAnimation(View view, float position){

    mView = view;
    this.position = position;
}

@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
    mView.setY(position);
    mView.requestLayout();
}

}

Then I made a textview in MainActivity.java and set onTouchListener and then created this method slide() to do the task I described above.

Below is the code: onCreate():

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    _root = (ViewGroup)findViewById(R.id.root);

    _view = new TextView(this);
    _view.setText("TextView!!!!!!!!");

    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(150, 50);
    layoutParams.leftMargin = 50;
    layoutParams.topMargin = 50;
    layoutParams.bottomMargin = -250;
    layoutParams.rightMargin = -250;
    _view.setLayoutParams(layoutParams);

    _view.setOnTouchListener(this);
    _root.addView(_view);
}

slide():

private void slide(View view, float position){
    Animation animation = new MyTranslateAnimation(view, position);
    animation.setInterpolator(new DecelerateInterpolator());
    animation.setDuration(200);
    animation.start();
}

And as below I used slide() method:

public boolean onTouch(View view, MotionEvent event) {
    final int X = (int) event.getRawX();
    final int Y = (int) event.getRawY();
    switch (event.getAction() & MotionEvent.ACTION_MASK) {
        case MotionEvent.ACTION_DOWN:
            RelativeLayout.LayoutParams lParams = (RelativeLayout.LayoutParams) view.getLayoutParams();
            _xDelta = X - lParams.leftMargin;
            _yDelta = Y - lParams.topMargin;
            break;
        case MotionEvent.ACTION_UP:
            slide(view, 100);
            break;
        case MotionEvent.ACTION_POINTER_DOWN:
            break;
        case MotionEvent.ACTION_POINTER_UP:
            break;
        case MotionEvent.ACTION_MOVE:
            RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) view.getLayoutParams();
            layoutParams.leftMargin = X - _xDelta;
            layoutParams.topMargin = Y - _yDelta;
            layoutParams.rightMargin = -250;
            layoutParams.bottomMargin = -250;
            view.setLayoutParams(layoutParams);
            break;
    }
    _root.invalidate();
    return true;
}

Also I don't want to use nineoldandroid library for this. Any help regarding this is highly appreciated.

Upvotes: 2

Views: 361

Answers (1)

Dhrumil Patel
Dhrumil Patel

Reputation: 554

slide():

public void slide(float position){
    ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(overflow.get(), "translationY", position);
    objectAnimator.setInterpolator(new DecelerateInterpolator());
    objectAnimator.setDuration(200);
    objectAnimator.start();
}

Upvotes: 3

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