Issue
I have an ImageView with width = 1080
and height = 1920
I have a bitmap with width = 3340
and height = 1920
I set the scale type of the imageView to MATRIX. So that the bitmap is not scaled to the imageView
imageView.setScaleType(ImageView.ScaleType.MATRIX);
I would like to animate the bitmap from left to right and vice versa.
Is it possible to be done? Any thoughts?
Solution
please create following Custom view class into your project
package com.company.xyz;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
/**
* Created by rohitp on 12/10/2015.
*/
public class CustomImageView extends View {
Bitmap bm;
int x, y;
boolean flag = true;
public CustomImageView(Context context) {
super(context);
}
public CustomImageView(Context context, AttributeSet attrs) {
super(context, attrs);
try{
int src_resource = attrs.getAttributeResourceValue("http://schemas.android.com/apk/res/android", "src", 0);
bm = getDrawable(getResources(),src_resource);
}catch (Exception e){
}
}
public static Bitmap getDrawable(Resources res, int id){
return BitmapFactory.decodeResource(res, id);
}
public void setBm(Bitmap bm) {
this.bm = bm;
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
if(bm != null){
if(flag){
if (x < (getMeasuredWidth()-bm.getWidth())) {
x += 10;
Log.e("Custom",x+""+getMeasuredWidth());
}
else {
Log.e("Custom",x+" false");
flag = false;
}
}else{
if (x >0 ) {
x -= 10;
Log.e("Custom",x+" -");
}
else {
flag = true;
Log.e("Custom",x+" true");
}
}
canvas.drawBitmap(bm, x, y, new Paint());
}
invalidate();//calls this method again and again
}
}
create an layout xml with following
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<com.company.xyz.CustomImageView
android:layout_width="match_parent"
android:layout_height="100dp"
android:id="@+id/animate_pic"
android:src="@drawable/test">
</com.company.xyz.CustomImageView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button"
android:layout_gravity="bottom"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
And you can also change bitmap through code at runtime
((CustomImageView) findViewById(R.id.animate_pic)).setBm(bm)
Answered By - Rohit Patil
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