028 Java Android Program to Demonstrate an Advanced Animation Activity
Posted by Superadmin on December 25 2015 04:16:01

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Java Android Program to Demonstrate an Advanced Animation Activity

This Android Java Program lets you create an Activity to create an Advanced Animation Application.
Here is source code of the Program to create an Activity to Create an Advanced Animation Application. The program is successfully compiled and run on a Windows system using Eclipse Ide. The program output is also shown below.

Using thread and bit-map creating a simple animation of an image.

Main Activity


package com.example.animation_activity2;


import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnTouchListener;

public class MainActivity extends Activity implements OnTouchListener{
Ourview v;
Bitmap bm , bitmap1;
float x,y;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
v = new Ourview(this);
v.setOnTouchListener(this);
bm = BitmapFactory.decodeResource(getResources(), R.drawable.image4);
bitmap1 = BitmapFactory.decodeResource(getResources(), R.drawable.mario2);

x=0;y=0;
setContentView(v);
}

@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
v.pause();
}

@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
v.resume();
}

// surface view is going to be a thread now
class Ourview extends SurfaceView implements Runnable {

Thread th = null;
SurfaceHolder holder;
boolean var = false;
sprite sprite_object;
boolean sprite_loaded = false;
public Ourview(Context context) {
super(context);
// TODO Auto-generated constructor stub
holder = getHolder();


}

@Override
public void run() {
// TODO Auto-generated method stub
sprite_object = new sprite(Ourview.this, bitmap1);
while (var = true) {
// do stuff
if (!holder.getSurface().isValid()) {
continue;
}
if(!sprite_loaded){
sprite_loaded=true;
}
Canvas c = holder.lockCanvas();// while drawing on a canvas we
// lock it and after drawing on
// it we unlock it
OnDraw(c);
holder.unlockCanvasAndPost(c);
}
}

@SuppressLint("WrongCall")
void OnDraw(Canvas c){
c.drawARGB(255, 250, 150, 20);//rgb values
c.drawBitmap(bm, x -(bm.getWidth()/2), y -(bm.getHeight()/2), null );
sprite_object.onDraw(c);
}

public void pause() {

var = false;
while (true) {
try {
th.join();// would pause the currently executing thread till
// the user finishes its job
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
}
th = null;
}

public void resume() {
var = true;
th = new Thread(this);
th.start();
}
}

@Override
public boolean onTouch(View v, MotionEvent me) {
// TODO Auto-generated method stub

//x=me.getX();//ontouch listener
//y=me.getY();

try {
Thread.sleep(80);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
switch (me.getAction()) {
case MotionEvent.ACTION_DOWN:
x= me.getX();
y=me.getY();
break;

case MotionEvent.ACTION_UP:
x= me.getX();
y=me.getY();
break;

case MotionEvent.ACTION_MOVE:
x= me.getX();
y=me.getY();
break;

default:
break;
}

return true;
}


}


Sprite

package com.example.animation_activity2;

import com.example.animation_activity2.MainActivity.Ourview;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;

public class sprite {

int x,y,xspeed,yspeed,height,width;
Bitmap b;
Ourview our_view;
int current_frame=0,direction=1;
public sprite(Ourview ourview, Bitmap bitmap1) {
// TODO Auto-generated constructor stub
b=bitmap1;
our_view=ourview;
//4 rows
height =b.getHeight()/4;
//6 columns
width = b.getWidth()/6;
x=y=0;
xspeed=30;
yspeed=0;
}

public void onDraw(Canvas c) {
// TODO Auto-generated method stub
update();
int srcX=current_frame*width;
int srcy=direction*height;
Rect src = new Rect(srcX, srcy, srcX+width,srcy+ height);
Rect dst = new Rect(x,y,x+width,y+height);
c.drawBitmap(b,src, dst, null);

}

private void update() {
// TODO Auto-generated method stub
//1 right
//3 left
//down 2
//up 0

//facing down
if(x>our_view.getWidth() -width -xspeed){
xspeed=0;
yspeed=30;
direction=2;
}

//left
if(y>our_view.getHeight() - height -yspeed){
xspeed=-30;
yspeed=0;
direction=3;
}

//up
if(x+xspeed<0){
x=0;
xspeed=0;
yspeed=-30;
direction=0;
}

//right
if(y+yspeed<0){
y=0;
xspeed=30;
yspeed=0;
direction=1;
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
current_frame=++current_frame%6;
x+=xspeed;
y+=yspeed;
}

}