جسچرها و حرکات لمسی در اندروید

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.RelativeLayout;

public class MainActivity extends Activity implements View.OnTouchListener {

int clickCount;

private ViewGroup RootLayout;

private int Position_X;

private int Position_Y;

long startTime = 0 ;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

RootLayout = (ViewGroup) findViewById(R.id.rootLayout);

//new image

Button NewImage = (Button)findViewById(R.id.new_image_button);

NewImage.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Add_Image();

}

});

clickCount = 0;

}

private void Add_Image() {

final ImageView iv = new ImageView(this);

iv.setImageResource(R.drawable.image);

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(150, 150);

iv.setLayoutParams(layoutParams);

RootLayout.addView(iv, layoutParams);

iv.setOnTouchListener(this);

}

public boolean onTouch(final View view, MotionEvent event) {

final int X = (int) event.getRawX();

final int Y = (int) event.getRawY();

int pointerCount = event.getPointerCount();

switch (event.getAction() & MotionEvent.ACTION_MASK) {

case MotionEvent.ACTION_DOWN:

RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) view.getLayoutParams();

Position_X = X - layoutParams.leftMargin;

Position_Y = Y - layoutParams.topMargin;

break;

case MotionEvent.ACTION_UP:

if (startTime == 0){

startTime = System.currentTimeMillis();

}else {

if (System.currentTimeMillis() - startTime < 200) {

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);

builder.setMessage("Are you sure you want to delete this?");

builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

view.setVisibility(View.GONE);

}

});

builder.setNegativeButton("No", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

dialog.dismiss();

}

});

AlertDialog alertDialog = builder.create();

alertDialog.show();

}

startTime = System.currentTimeMillis();

}

break;

case MotionEvent.ACTION_POINTER_DOWN:

break;

case MotionEvent.ACTION_POINTER_UP:

break;

case MotionEvent.ACTION_MOVE:

if (pointerCount == 1){

RelativeLayout.LayoutParams Params = (RelativeLayout.LayoutParams) view.getLayoutParams();

Params.leftMargin = X - Position_X;

Params.topMargin = Y - Position_Y;

Params.rightMargin = -500;

Params.bottomMargin = -500;

view.setLayoutParams(Params);

}

if (pointerCount == 2){

RelativeLayout.LayoutParams layoutParams1 = (RelativeLayout.LayoutParams) view.getLayoutParams();

layoutParams1.width = Position_X +(int)event.getX();

layoutParams1.height = Position_Y + (int)event.getY();

view.setLayoutParams(layoutParams1);

}

//Rotation

if (pointerCount == 3){

//Rotate the ImageView

view.setRotation(view.getRotation() + 10.0f);

}

break;

}

// Schedules a repaint for the root Layout.

RootLayout.invalidate();

retu true;

}

}

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