瀑布流（点击跳转)
添加的依赖
compile 'com.android.support:recyclerview-v7:21.0.3' compile 'com.github.bumptech.glide:glide:3.7.0' compile 'com.google.code.gson:gson:2.8.2' compile 'com.squareup.okio:okio:1.5.0' compile 'com.squareup.okhttp3:okhttp:3.2.0' compile 'com.squareup.okhttp3:logging-interceptor:3.4.1' compile 'com.orhanobut:logger:1.15' compile 'com.android.support:mediarouter-v7:25.0.0' <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>
activity_main
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.bawie.www.yuekaodemo.MainActivity"> <android.support.v7.widget.RecyclerView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/recyclerView"> </android.support.v7.widget.RecyclerView> </LinearLayout>
item
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/imageView" android:src="@drawable/a" /> </LinearLayout>
MainActivity
package com.bawie.www.yuekaodemo; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.DefaultItemAnimator; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.StaggeredGridLayoutManager; import android.util.Log; import android.view.View; import com.bawie.www.yuekaodemo.adapter.MyRecyclerViewAdapter; import java.util.ArrayList; public class MainActivity extends AppCompatActivity { /** * 复用视图的控件 */ private RecyclerView recyclerView; /** * 显示的数据 */ private ArrayList<String> mDatas; /** * RecyclerView的适配器 */ private MyRecyclerViewAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //1.找到控件 recyclerView = (RecyclerView) findViewById(R.id.recyclerView); //2.声名为瀑布流的布局方式: 3列,垂直方向 StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL); //3.为recyclerView设置布局管理器 recyclerView.setLayoutManager(staggeredGridLayoutManager); initData();//初始化数据 //3.创建适配器 adapter = new MyRecyclerViewAdapter(this, mDatas); //设置添加,移除item的动画,DefaultItemAnimator为默认的 recyclerView.setItemAnimator(new DefaultItemAnimator()); //4.设置适配器 recyclerView.setAdapter(adapter); adapter.setOnItemClickListener(new MyRecyclerViewAdapter.OnItemClickListener() { @Override public void onItemClick(View view, int position) { Intent in=new Intent(MainActivity.this,GouWuCheActivity.class); startActivity(in); } }); } //初始化数据 protected void initData(){ mDatas = new ArrayList<String>(); for (int i = 'A'; i < 'z'; i++){ mDatas.add("" + (char) i); mDatas.add("R.drawable.a"); mDatas.add("R.drawable.r"); } } }
MyRecyclerViewAdapter
package com.bawie.www.yuekaodemo.adapter; import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import com.bawie.www.yuekaodemo.R; import java.util.ArrayList; import java.util.List; import java.util.Random; */ public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.MyViewHolder> implements RecyclerView.OnClickListener{ private OnItemClickListener mOnItemClickListener = null; private Context context; private List<String> list;//数据 private List<Integer> heightList;//装产出的随机数 public MyRecyclerViewAdapter(Context context, List<String> list) { this.context = context; this.list = list; //记录为每个控件产生的随机高度,避免滑回到顶部出现空白 heightList = new ArrayList<>(); for (int i = 0; i < list.size(); i++) { int height = new Random().nextInt(200) + 100;//[100,300)的随机数 heightList.add(height); } } @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { //找到item的布局 View view= LayoutInflater.from(context).inflate(R.layout.item,parent,false); view.setOnClickListener(this); return new MyViewHolder(view);//将布局设置给holder } @Override public int getItemCount() { return list.size(); } @Override public void onBindViewHolder(final MyViewHolder holder, final int position) { //填充数据 // holder.imageView.setImageURI(Uri.parse(list.get(position))); // holder.tv //holder.itemView.setTag(position); //由于需要实现瀑布流的效果,所以就需要动态的改变控件的高度了 ViewGroup.LayoutParams params = holder.imageView.getLayoutParams(); params.height=heightList.get(position); holder.imageView.setLayoutParams(params); holder.itemView.setTag(position); } @Override public void onClick(View view) { if (mOnItemClickListener != null) { //注意这里使用getTag方法获取position mOnItemClickListener.onItemClick(view,(int)view.getTag()); } } //define interface public static interface OnItemClickListener { void onItemClick(View view , int position); } public void setOnItemClickListener(OnItemClickListener listener) { this.mOnItemClickListener = listener; } class MyViewHolder extends RecyclerView.ViewHolder{ ImageView imageView; // ImageView imageView2; public MyViewHolder(View itemView) { super(itemView); imageView = (ImageView) itemView.findViewById(R.id.imageView); // imageView2 = (ImageView) itemView.findViewById(R.id.imageView2); } } }
