RecycleView界面跳转设计

Android开发——RecycleView设计及activity生命周期及界面跳转

本次作业基于上次的作业基础对于news界面的设计加入点击效果。如图：

 预计效果，在此界面点击后会跳转到一个新的界面。

实验步骤：

1.Activity_2文件设计：该文件用于跳转界面的数据接收

package com.example.mywechat01;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity2 extends AppCompatActivity {
    private TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        Intent i=getIntent();
        tv=(TextView) findViewById(R.id.textView7);
        tv.setText(i.getStringExtra("ouwen"));
    }
}

2.详情界面的设计：top_2.xml 、activity_main2.xml

（1）top_2.xml

<?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">

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:layout_weight="1"
        android:background="#8A5757"
        android:gravity="center"
        android:text="TextView"
        android:textColor="@color/white"
        android:textSize="20sp" />
</LinearLayout>

(2)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=".MainActivity2">

    <include
        layout="@layout/top_2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/textView7"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="5"
        android:gravity="center"
        android:text="TextView" />

</LinearLayout>

3.Adapter文件

package com.example.mywechat01;


import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import androidx.recyclerview.widget.RecyclerView;

import java.util.List;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
    private Context mContext;
    private List<String> mlist;

    public MyAdapter(List<String> mlist,Context context){
        this.mContext=context;
        this.mlist=mlist;
    }


    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(this.mContext).inflate(R.layout.item,parent,false);
        return new MyViewHolder((view));
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        holder.number.setText(position + 1 + "");
        holder.content.setText(mlist.get(position));
        String ouwen=mlist.get(position);
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i =new Intent(mContext,MainActivity2.class);
                i.putExtra("ouwen",ouwen+"请求与你视频聊天·····");
                mContext.startActivity(i);
            }
        });

    }

    @Override
    public int getItemCount() {

        return mlist.size();
    }

    class MyViewHolder extends RecyclerView.ViewHolder {
        TextView number,content;
        public MyViewHolder(View itemView) {
            super(itemView);
            number=itemView.findViewById(R.id.number);
            content=itemView.findViewById(R.id.content);
        }
    }
}

完成之后运行即可。

结果展示：

最终代码仓库：

刘志儒/MyWechat01