Question

I have been created the animation arrow. When I press the button then it rotate -45 degree and then goes back arrow.
My Question is: I want to stop the arrow at -45 degree. When I click the button again then it should move the arrow -45 to -90 and so on.
Please help me regarding this problem. thanks

I am placing code here.

<?xml version="1.0" encoding="utf-8"?>
 <set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">

        <rotate
            android:fromDegrees="0"
            android:toDegrees="-45"
            android:toYScale="0.0"
            android:pivotX="50%"
            android:pivotY="50%"
            android:duration="400"


             />
    </set>

---

hyperspace_jump.xml

package kh.qasim;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;

public class CustomAnimationActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);
        final ImageView image = (ImageView) findViewById(R.id.imageView1);
        final Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump);
        Button btn = (Button) findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub

                    image.startAnimation(hyperspaceJump);

            }
        });

    }
}

---

CustomAnimationActivity.java

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<ImageView android:id="@+id/imageView1" android:src="@drawable/up" android:layout_width="203dp" android:layout_height="148dp"></ImageView>
</LinearLayout>

---

main.xml

Answer 1

First, if you want to prevent you image to revert to previous state afterb the animation, you need to use :

anim.setFillAfter(true);

Also, in order to be able to change orientation dynamically, you should create your animation programmatically, instead of doing it from an XML file :

RotateAnimation anim = new RotateAnimation(fromDegrees, toDegrees);

Use fromDegress and toDegrees variable to control the start and end orientation of your object. For instance, you could put save the current orientation in a variable that you would call currentOrientation. So, you just need to call :

RotateAnimation anim = new RotateAnimation(cuurentOrientation, currentOrientation - 45);

Then start the animation like you did before.

At the end of the animation, just store the new orientation in currentOrientation.