Android Open Source - ChitChat Fab

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Back to project page ChitChat.
License

The source code is released under:
MIT License
If you think the Android project ChitChat listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package com.shivamb7.chitchat.workers;
import android.animation.ObjectAnimator;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import com.shivamb7.chitchat.R;
/*w  w  w .j a v a  2  s . co  m*/
public class Fab extends View 
{
    Context _context;
    Paint mButtonPaint, mDrawablePaint;
    Bitmap  mBitmap;
    int mScreenHeight;
  float currentY;;
    boolean mHidden = false;

    public Fab(Context context, AttributeSet attributeSet)
    {
        super(context, attributeSet);
        _context = context;
        init(Color.WHITE);
    }
    
    @SuppressLint("NewApi")
  public Fab(Context context)
    {
        super(context);
        _context = context;
        init(Color.WHITE);
    }
    
    public void setFabColor(int fabColor)
    {
      init(fabColor);
    }
    
    public void setFabDrawable(Drawable fabDrawable)
    {
      Drawable myDrawable = fabDrawable;
        mBitmap = ((BitmapDrawable) myDrawable).getBitmap();
        invalidate();
    }
    
    
  public void init(int fabColor)
    {
      setWillNotDraw(false);
      this.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
        mButtonPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mButtonPaint.setColor(fabColor);
        mButtonPaint.setStyle(Paint.Style.FILL);
        mButtonPaint.setShadowLayer(10.0f, 0.0f, 3.5f, Color.argb(100, 0, 0, 0));
        mDrawablePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        invalidate();
        
        WindowManager mWindowManager = (WindowManager) _context.getSystemService(Context.WINDOW_SERVICE);
    Display display = mWindowManager.getDefaultDisplay();
    Point size = new Point();
    display.getSize(size);
    mScreenHeight = size.y;
    }
    
    @Override
    protected void onDraw(Canvas canvas) 
    {
      setClickable(true);
        canvas.drawCircle(getWidth()/2, getHeight()/2,(float) (getWidth()/2.6), mButtonPaint);
      canvas.drawBitmap(mBitmap, (getWidth() - mBitmap.getWidth()) / 2, (getHeight() - mBitmap.getHeight()) / 2, mDrawablePaint);
    }

  @Override
  public boolean onTouchEvent(MotionEvent event) 
  {
    if(event.getAction() == MotionEvent.ACTION_UP)
    {
      setAlpha(1.0f);
      }
    else if(event.getAction() == MotionEvent.ACTION_DOWN)
      {
      setAlpha(0.6f);
      }
    return super.onTouchEvent(event);
  }
    
  public int dpToPx(int dp) 
  {
      DisplayMetrics displayMetrics = getContext().getResources().getDisplayMetrics();
      int px = Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));       
      return px;
  }
  
  public void hideFab()
  {
    if(mHidden == false)
    {
      currentY = getY();
      ObjectAnimator mHideAnimation = ObjectAnimator.ofFloat(this, "Y", mScreenHeight);
      mHideAnimation.setInterpolator(new AccelerateInterpolator());
      mHideAnimation.start();
      mHidden = true;
    }
  }
  
  public void showFab()
  {
    if(mHidden == true)
    {
      ObjectAnimator mShowAnimation = ObjectAnimator.ofFloat(this, "Y", currentY);
      mShowAnimation.setInterpolator(new DecelerateInterpolator());
      mShowAnimation.start();
      mHidden = false;
    }
  }
    
}
Java Source Code List
