Android使用View Animation实现动画加载界面

package com.example.animationloading; 
 
import java.util.Timer; 
import java.util.TimerTask; 
 
import android.annotation.SuppressLint; 
import android.app.Dialog; 
import android.content.Context; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.view.animation.Animation; 
import android.view.animation.RotateAnimation; 
import android.widget.ImageView; 
 
/** 
 * 
* @ClassName: com.example.animationloading.LoadingDialog 
* @Description: 动画加载Dialog 
* @author zhaokaiqiang 
* @date 2014-10-27 下午4:42:52 
* 
 */ 
public class LoadingDialog extends Dialog { 
 
 protected static final String TAG = "LoadingDialog"; 
 // 动画间隔 
 private static final int DURATION = 800; 
 // 前景图片 
 private ImageView img_front; 
 // 定时器，用来不断的播放动画 
 private Timer animationTimer; 
 // 旋转动画 
 private RotateAnimation animationL2R; 
 
 @SuppressLint("HandlerLeak") 
 private Handler handler = new Handler() { 
 
  public void handleMessage(Message msg) { 
   img_front.setAnimation(animationL2R); 
   animationL2R.start(); 
  }; 
 
 }; 
 
 public LoadingDialog(Context context) { 
  super(context, R.style.dialog); 
 } 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.dialog_loading); 
 
  img_front = (ImageView) findViewById(R.id.img_front); 
  animationTimer = new Timer(); 
 
  // 从左到右的旋转动画，设置旋转角度和旋转中心 
  animationL2R = new RotateAnimation(0f, -90f, 
    Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 
    0.5f); 
  // 设置动画的运行时长 
  animationL2R.setDuration(DURATION); 
  // 动画运行结束之后，保存结束之后的状态 
  animationL2R.setFillAfter(true); 
  // 设置重复的次数 
  animationL2R.setRepeatCount(1); 
  //设置重复模式为逆运动 
  animationL2R.setRepeatMode(Animation.REVERSE); 
  // 执行间隔任务，开始间隔是0，每隔DURATION * 2执行一次 
  animationTimer.schedule(new TimerTask() { 
 
   @Override 
   public void run() { 
    handler.sendEmptyMessage(1); 
   } 
  }, 0, DURATION * 2); 
 
 } 
 
 @Override 
 protected void onStop() { 
  super.onStop(); 
  animationTimer.cancel(); 
 } 
 
} 

package com.example.animationloading; 
 
import java.util.Timer; 
import java.util.TimerTask; 
 
import android.annotation.SuppressLint; 
import android.app.Dialog; 
import android.content.Context; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.widget.ImageView; 
 
/** 
 * 
 * @ClassName: com.example.animationloading.LoadingDialog 
 * @Description: 动画加载Dialog 
 * @author zhaokaiqiang 
 * @date 2014-10-27 下午4:42:52 
 * 
 */ 
public class LoadingDialog extends Dialog { 
 
 protected static final String TAG = "LoadingDialog"; 
 // 动画间隔 
 private static final int DURATION = 800; 
 // 前景图片 
 private ImageView img_front; 
 // 定时器，用来不断的播放动画 
 private Timer animationTimer; 
 
 private Animation animation; 
 
 private Context context; 
 
 @SuppressLint("HandlerLeak") 
 private Handler handler = new Handler() { 
 
  public void handleMessage(Message msg) { 
   img_front.setAnimation(animation); 
   animation.start(); 
  }; 
 
 }; 
 
 public LoadingDialog(Context context) { 
  super(context, R.style.dialog); 
  this.context = context; 
 } 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.dialog_loading); 
 
  img_front = (ImageView) findViewById(R.id.img_front); 
  animationTimer = new Timer(); 
 
  animation = AnimationUtils.loadAnimation(context, 
    R.anim.anim_load_dialog); 
   
  // 执行间隔任务，开始间隔是0，每隔DURATION * 2执行一次 
  animationTimer.schedule(new TimerTask() { 
 
   @Override 
   public void run() { 
    handler.sendEmptyMessage(1); 
   } 
  }, 0, DURATION * 2); 
 
 } 
 
 @Override 
 protected void onStop() { 
  super.onStop(); 
  animationTimer.cancel(); 
 } 
 
}