Android动画开发四个功能全解

package zyf.myActionAnimation; 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; public class myActionAnimation extends Activity implements OnClickListener { /** Called when the activity is first created. */ private Button button_alpha; private Button button_scale; private Button button_translate; private Button button_rotate; private Animation myAnimation_Alpha; private Animation myAnimation_Scale; private Animation myAnimation_Translate; private Animation myAnimation_Rotate; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); button_alpha = (Button) findViewById(R.id.button_Alpha); button_alpha.setOnClickListener(this); button_scale = (Button) findViewById(R.id.button_Scale); button_scale.setOnClickListener(this); button_translate = (Button) findViewById(R.id.button_Translate); button_translate.setOnClickListener(this); button_rotate = (Button) findViewById(R.id.button_Rotate); button_rotate.setOnClickListener(this); } public void onClick(View button) { // TODO Auto-generated method stub switch (button.getId()) { case R.id.button_Alpha: { myAnimation_Alpha = AnimationUtils.loadAnimation(this,R.anim.my_alpha_action); button_alpha.startAnimation(myAnimation_Alpha); } break; case R.id.button_Scale: { myAnimation_Scale= AnimationUtils.loadAnimation(this,R.anim.my_scale_action); button_scale.startAnimation(myAnimation_Scale); } break; case R.id.button_Translate: { myAnimation_Translate= AnimationUtils.loadAnimation(this,R.anim.my_translate_action); button_translate.startAnimation(myAnimation_Translate); } break; case R.id.button_Rotate: { myAnimation_Rotate= AnimationUtils.loadAnimation(this,R.anim.my_rotate_action); button_rotate.startAnimation(myAnimation_Rotate); } break; default: break; } } }