直播系统代码,登录时常用验证方式
直播系统代码,登录时常用验证方式实现的相关代码
引用:
dependencies {
...
compile 'com.android.support:recyclerview-v7:25.3.1'
}
代码:
1、item布局
<?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="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/id_num"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#ff5500"
android:gravity="center"
android:text="hello" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimary" />
</LinearLayout>
2、适配器代码
package com.example.lihui.testrecycleview;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;
/**
* Created by lihui on 2017/8/22.
*/
public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.MyViewHolder> {
private static final String TAG = "MyRecyclerAdapter";
private List<String> mData;
private Context mContext;
private LayoutInflater inflater;
public MyRecyclerAdapter(Context context, List<String> data) {
this.mContext = context;
this.mData = data;
inflater = LayoutInflater.from(mContext);
}
@Override
public int getItemCount() {
return mData.size();
}
@Override
public void onViewRecycled(MyViewHolder holder) {
super.onViewRecycled(holder);
Log.d(TAG, "onViewRecycled: " + holder.tv.getText().toString() + ", position: " + holder.getAdapterPosition());
}
//填充onCreateViewHolder方法返回的holder中的控件
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
Log.d(TAG, "onBindViewHolder: 验证是否重用了");
Log.d(TAG, "onBindViewHolder: 重用了" + holder.tv.getTag());
Log.d(TAG, "onBindViewHolder: 放到了" + mData.get(position));
holder.tv.setText(mData.get(position));
holder.tv.setTag(mData.get(position));
}
//重写onCreateViewHolder方法,返回一个自定义的ViewHolder
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Log.d(TAG, "onCreateViewHolder");
View view = inflater.inflate(R.layout.item_layout, parent, false);
return new MyViewHolder(view);
}
static class MyViewHolder extends RecyclerView.ViewHolder {
TextView tv;
public MyViewHolder(View view) {
super(view);
tv = (TextView) view.findViewById(R.id.id_num);
}
}
}
3、activity代码
package com.example.lihui.testrecycleview;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private List<String> mData;
private MyRecyclerAdapter recycleAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView) findViewById(R.id.id_recyclerView);
initData();
recycleAdapter = new MyRecyclerAdapter(MainActivity.this, mData);
//设置布局管理器 , 将布局设置成纵向
LinearLayoutManager linerLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
recyclerView.setLayoutManager(linerLayoutManager); // ...
recyclerView.setAdapter(recycleAdapter);
// ...
}
private void initData() {
mData = new ArrayList<>();
mData.add("test1"); //0
mData.add("test2"); //0
mData.add("test3"); //0
mData.add("test4"); //0
mData.add("test5"); //0
mData.add("test6"); //0
mData.add("test7"); //0
mData.add("test8"); //0
mData.add("test9"); //0
mData.add("test10"); //0
mData.add("test11"); //0
mData.add("test12"); //0
mData.add("test13"); //0
mData.add("test14"); //0
}
}
4、recycleview 布局
<?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"
tools:context="com.example.lihui.testrecycleview.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/id_recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
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