Android GridView实现动画效果

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项目中用到的一些动画，GridView的Item依次从屏幕外飞入到相应位置，附上相关代码：

MainActivity.Java

package com.mundane.gridanimationdemo; 
 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.view.animation.Animation; 
import android.view.animation.TranslateAnimation; 
import android.widget.Button; 
import android.widget.GridView; 
 
import java.util.ArrayList; 
import java.util.List; 
 
public class MainActivity extends AppCompatActivity { 
 
  private GridView mGridView; 
  private List mList; 
  private GridAdapter mGridAdapter; 
  private Button mBtnRefresh; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    mGridView = (GridView) findViewById(R.id.grid_view); 
    mBtnRefresh = (Button) findViewById(R.id.btn_refresh); 
    mBtnRefresh.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
        mBtnRefresh.setVisibility(View.INVISIBLE); 
        mGridAdapter.notifyDataSetChanged(); 
      } 
    }); 
    mList = new ArrayList<>(); 
    for (int i = 0; i < 9; i++) { 
      mList.add(i + ""); 
    } 
    mGridAdapter = new GridAdapter(mList); 
    final TranslateAnimation animation = new TranslateAnimation( 
        Animation.RELATIVE_TO_PARENT, 
        1.0f, 
        Animation.RELATIVE_TO_PARENT, 
        0, 
        Animation.RELATIVE_TO_SELF, 
        0, 
        Animation.RELATIVE_TO_SELF, 
        0); 
    animation.setDuration(200); 
    animation.setAnimationListener(new Animation.AnimationListener() { 
      @Override 
      public void onAnimationStart(Animation animation) { 
        mBtnRefresh.setVisibility(View.VISIBLE); 
      } 
 
      @Override 
      public void onAnimationEnd(Animation animation) { 
 
      } 
 
      @Override 
      public void onAnimationRepeat(Animation animation) { 
 
      } 
    }); 
    mGridAdapter.setOnLastItemAnimationEndListener(new GridAdapter.OnLastItemAnimationEndListener() { 
      @Override 
      public void onAnimationEnd() { 
        mBtnRefresh.startAnimation(animation); 
      } 
    }); 
    mGridView.setAdapter(mGridAdapter); 
 
  } 
} 

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