Android - Animate a View's topMargin/bottomMargin/etc in LinearLayout or RelativeLayout

Question

I am trying to create a menu that slides up from the bottom. It starts with the menu\'s view just visible at the bottom of the screen, and then clicking it causes it to sli

Answer 1

I feel like this is a bit less of a hack. Basically, it's making your own animator. Below it's setup for only modifying topMargin in a RelativeLayout, but it wouldn't be hard to generalize it.

import java.util.Calendar;

import android.app.Activity;
import android.util.Log;
import android.view.View;
import android.view.animation.Interpolator;
import android.widget.RelativeLayout.LayoutParams;

public class MarginAnimation extends Thread {
    final String TAG = "MarginAnimation";
    long mStartTime;
    long mTotalTime;
    Interpolator mI;

    int mStartMargin;
    int mEndMargin;

    View mV;
    Activity mA;
    public MarginAnimation(Activity a, View v, 
            int startMargin, int endMargin, int totaltime,
            Interpolator i) {
        mV = v;
        mStartMargin = startMargin;
        mEndMargin = endMargin;
        mTotalTime = totaltime;
        mI = i;
        mA = a;
    }

    @Override
    public void run() {
        mStartTime = Calendar.getInstance().getTimeInMillis();
        while(!this.isInterrupted() && 
                Calendar.getInstance().getTimeInMillis() - mStartTime < mTotalTime) {

            mA.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if(MarginAnimation.this.isInterrupted())
                        return;
                    long cur_time = Calendar.getInstance().getTimeInMillis();
                    float perc_done = 1.0f*(cur_time-mStartTime)/mTotalTime;

                    final int new_margin = (int)(1.0f*(mEndMargin-mStartMargin)*mI.getInterpolation(perc_done)) + mStartMargin;
                    LayoutParams p = (LayoutParams) mV.getLayoutParams();
                    Log.v(TAG, String.format("Setting Margin to %d", new_margin));
                    p.topMargin = new_margin;
                    mV.setLayoutParams(p);                  
                }
            });

            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                return;
            }
        }
    }

}