Android Open Source - AndroidFloatingImage Floating Image

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License

The source code is released under:

Apache License

Java Source Code

package com.styleme.floating.example.views;
//from  w w  w  . j a  va2  s  . c o m
import android.content.Context;
import android.graphics.PixelFormat;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.Toast;

import com.styleme.floating.example.R;

public class FloatingImage extends ImageView implements OnTouchListener {
  WindowManager windowManager; // to hold our image on screen
  Context ctx; // context so in case i use it somewhere.
  GestureDetector gestureDetector; // to detect some listener on the image.
  WindowManager.LayoutParams params; // layoutParams where i set the image height/width and other.
  WindowManager.LayoutParams paramsF;
  int initialX;
  int initialY;
  float initialTouchX;
  float initialTouchY;
  /**
   * @param context
   */
  public FloatingImage(Context context) {
    super(context);
    this.ctx = context;
    this.setOnTouchListener(this); // setting touchListener to the imageView
    this.setImageResource(R.drawable.ic_launcher); // setting icon to the imageView
    gestureDetector = new GestureDetector(ctx, new GestureListener());
    windowManager = (WindowManager) ctx.getSystemService("window"); // ini the windowManager
    params = new WindowManager.LayoutParams(
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.WRAP_CONTENT,
        PixelFormat.TRANSLUCENT); // assigning height/width to the imageView
    params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
        | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR
        | WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM; // assigning some flags to the layout
    params.gravity = Gravity.TOP | Gravity.LEFT; // setting the gravity of the imageView
    params.windowAnimations = android.R.style.Animation_Toast; // adding an animation to it.
    params.x = 0; // horizontal location of imageView
    params.y = 100; // vertical location of imageView
    params.height = 120; // given it a fixed height in case of large image
    params.width = 120; // given it a fixed width in case of large image
    params.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN;
    windowManager.addView(this, params); // adding the imageView & the  params to the WindowsManger.
  }

  /**
   * @param context
   * @param attrs
   */
  public FloatingImage(Context context, AttributeSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub
  }

  /**
   * @param context
   * @param attrs
   * @param defStyle
   */
  public FloatingImage(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    // TODO Auto-generated constructor stub
  }

  /**
   * @param v
   * @param event
   * @return true/false
   */
  @Override
  public boolean onTouch(View v, MotionEvent event) {
    gestureDetector.onTouchEvent(event);
    paramsF = params; // getting the layout params from the current one and assigning new one.
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
      paramsF = params;
      initialX = paramsF.x; // Horizontal location of the ImageView
      initialY = paramsF.y; // Vertical location of the ImageView
      initialTouchX = event.getRawX(); //X coordinate  location of the ImageView
      initialTouchY = event.getRawY(); //Y coordinate  location of the ImageView
      break;
    case MotionEvent.ACTION_UP: // this called when we actually leave the Imageview
      break;
    case MotionEvent.ACTION_MOVE:
      paramsF.x = initialX + (int) (event.getRawX() - initialTouchX);
      paramsF.y = initialY + (int) (event.getRawY() - initialTouchY);
      windowManager.updateViewLayout(this, paramsF);
      break;
    }
    return false; // returning false otherwise any touch event on the imageView wont work.
  }

  private class GestureListener extends
      GestureDetector.SimpleOnGestureListener {
    @Override
    public boolean onDown(MotionEvent e) {// When there is a touch event on the imageView
      return true;
    }

    @Override
    public boolean onDoubleTapEvent(MotionEvent e) { // perform Double tap on the ImageView
      Toast.makeText(ctx, "Hi You Double Tap Me", Toast.LENGTH_SHORT).show();
      return false;
    }

    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) { // perform single tap on the ImageView
      Toast.makeText(ctx, "Hi You Single Tap Me", Toast.LENGTH_SHORT).show();
      return true;
    }

    @Override
    public void onLongPress(MotionEvent e) { // perform long press on the ImageView
      Toast.makeText(ctx, "Hi You Long Tap Me", Toast.LENGTH_SHORT).show();
    }
  }
  /**
   * return [Remove the FloatingImage from the windowManager]
   */
  public void destroy(){
    if(windowManager != null){ // if the image still exists on the WindowManager release it.
      windowManager.removeView(this); // remove the ImageView
    }
  }
}

Java Source Code List

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