Android 动画（二） 实战演示——仿网易新闻安卓端菜单栏动画

package com.example.administrator.myapplication; import android.animation.Animator; import android.animation.ObjectAnimator; import android.app.Activity; import android.media.Image; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.KeyEvent; import android.view.Menu; import android.view.View; import android.view.animation.AccelerateDecelerateInterpolator; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.view.animation.AnticipateOvershootInterpolator; import android.view.animation.BounceInterpolator; import android.view.animation.LinearInterpolator; import android.view.animation.OvershootInterpolator; import android.widget.ImageButton; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; import org.w3c.dom.Text; public class MainActivity extends Activity { private ImageButton menu; private ImageButton icon1; private ImageButton icon2; private ImageButton icon3; private ImageButton icon4; private ImageButton icon5; private ImageButton icon6; private RelativeLayout rl_menu; private TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); menu = (ImageButton) findViewById(R.id.ibtn); icon1 = (ImageButton) findViewById(R.id.button); icon2 = (ImageButton) findViewById(R.id.button2); icon3 = (ImageButton) findViewById(R.id.button3); icon4 = (ImageButton) findViewById(R.id.button4); icon5 = (ImageButton) findViewById(R.id.button5); icon6 = (ImageButton) findViewById(R.id.button6); rl_menu = (RelativeLayout) findViewById(R.id.rl_menu); hide(); tv = (TextView)findViewById(R.id.textView); menu.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (rl_menu.getVisibility() == View.VISIBLE) hide(); else showMenu(); } }); tv.animate().alpha(0f).setDuration(1000).alpha(1f).setDuration(1000).start(); } @Override protected void onDestroy() { super.onDestroy(); System.out.println("test-onDestroy"); } public void showMenu() { final int count = 1; rl_menu.setVisibility(View.VISIBLE); Animation animation = AnimationUtils.loadAnimation(this, R.anim.menu_anim); animation.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { showBtn(count); } @Override public void onAnimationEnd(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } }); rl_menu.startAnimation(animation); } public void showBtn(final int count) { Animation animation = AnimationUtils.loadAnimation(this, R.anim.btn_anim); OvershootInterpolator overshootInterpolator = new OvershootInterpolator(4f); animation.setInterpolator(overshootInterpolator); animation.setStartOffset(count*50); animation.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { showBtn(count + 1); } @Override public void onAnimationEnd(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } }); switch (count) { case 1: icon1.setVisibility(View.VISIBLE); icon1.startAnimation(animation); break; case 2: icon2.setVisibility(View.VISIBLE); icon2.startAnimation(animation); break; case 3: icon3.setVisibility(View.VISIBLE); icon3.startAnimation(animation); break; case 4: icon4.setVisibility(View.VISIBLE); icon4.startAnimation(animation); break; case 5: icon5.setVisibility(View.VISIBLE); icon5.startAnimation(animation); break; case 6: icon6.setVisibility(View.VISIBLE); icon6.startAnimation(animation); break; } } public void hide() { rl_menu.setVisibility(View.GONE); icon1.setVisibility(View.GONE); icon2.setVisibility(View.GONE); icon3.setVisibility(View.GONE); icon4.setVisibility(View.GONE); icon5.setVisibility(View.GONE); icon6.setVisibility(View.GONE); } }