Android GridView实现动画效果
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<String> 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); } }
GridAdapter.java
package com.mundane.gridanimationdemo; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.animation.Animation; import android.view.animation.TranslateAnimation; import android.widget.BaseAdapter; import android.widget.TextView; import java.util.List; /** * Created by Jackie on 2017/3/7 16:29 */ public class GridAdapter extends BaseAdapter{ private List<String> mList; public GridAdapter(List<String> list) { mList = list; } @Override public int getCount() { return mList.size(); } @Override public Object getItem(int position) { return mList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { String text = mList.get(position); ViewHolder holder; if (convertView == null) { convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_desk_grid_item, parent, false); holder = new ViewHolder(convertView); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } convertView.setVisibility(View.INVISIBLE); holder.textView.setText(text); int count = 3 - position % 3; final TranslateAnimation translateAnimation = new TranslateAnimation( Animation.RELATIVE_TO_SELF, count, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0); translateAnimation.setDuration(count* 100); // final Animation animation = AnimationUtils.loadAnimation(parent.getContext(), R.anim.slide_in_right); final View finalConvertView = convertView; convertView.postDelayed(new Runnable() { @Override public void run() { finalConvertView.startAnimation(translateAnimation); } }, position * 200); translateAnimation.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { finalConvertView.setVisibility(View.VISIBLE); } @Override public void onAnimationEnd(Animation animation) { if (position == mList.size() - 1) { if (mListener != null) { mListener.onAnimationEnd(); } } } @Override public void onAnimationRepeat(Animation animation) { } }); return convertView; } static class ViewHolder { TextView textView; public ViewHolder(View view) { textView = (TextView) view.findViewById(R.id.tv); } } public interface OnLastItemAnimationEndListener { void onAnimationEnd(); } private OnLastItemAnimationEndListener mListener; public void setOnLastItemAnimationEndListener(OnLastItemAnimationEndListener listener) { mListener = listener; } }
参上上面的代码，还可以实现GridView Item的其他动画效果，注意//注释的部分，这个就是另外的动画效果，这里就不作过多的描述。
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.mundane.gridanimationdemo.MainActivity"> <Button android:visibility="invisible" android:id="@+id/btn_refresh" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="刷新"/> <GridView android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" android:stretchMode="columnWidth" android:id="@+id/grid_view" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:background="#f6f6f6" android:horizontalSpacing="10dp" android:numColumns="3" android:scrollbars="none" android:verticalSpacing="10dp"> </GridView> </LinearLayout>
card_desk_grid_item.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:background="#33000000" android:layout_width="match_parent" android:layout_height="156dp"> <TextView android:id="@+id/tv" android:gravity="center" android:layout_width="match_parent" android:layout_height="match_parent"/> </LinearLayout>
效果如下：
模拟器上运行很卡，真机上是很流畅的。
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