[移动开发]Android studio界面点击跳转设计

一、思路简述

1.设计xml文件

需要跳转到一个新的Activity页面，而页面设计需要在创建Activity的时候生成的xml文件中进行

package com.example.myapplication5;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Window;

public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.information_weixin);
    }
}

2、对item设置监听
即在onBindViewHolder中对item设置点击事件，当点击后执行所要跳转Activity中的代码。

3.外部使用该方法

最后需要对设置的adapter实现这个点击事件

二、代码展示

Adapter

public class MainActivity2 extends RecyclerView.Adapter<MySecondAdapter.InnerHolder> {

    private final Context mContext;
    private OnItemClickListener mListener;


    public MainActivity2(Context context){
        this.mContext=context;
    }

    @NonNull
    @Override
    public InnerHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = View.inflate(mContext, R.layout.item_my_recycler_view, null);
        return new InnerHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull InnerHolder holder, final int position) {
        holder.mTextView.setText("点击跳转");
        holder.mImageView.setImageResource(R.mipmap.ic_launcher_round);

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mListener.onItemClick(position);
            }
        });
    }


    public void setOnItemClickListener(OnItemClickListener listener) {
        this.mListener=listener;
    }

    public interface OnItemClickListener {
        void onItemClick(int position);
    }
    
    @Override
    public int getItemCount() {
        return 30;
    }

    public class InnerHolder extends RecyclerView.ViewHolder {

        private final TextView mTextView;
        private final ImageView mImageView;

        public InnerHolder(@NonNull View itemView) {
            super(itemView);
            mTextView = itemView.findViewById(R.id.tv_title);
            mImageView = itemView.findViewById(R.id.iv_pic);

        }
    }
}

layout

<?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"
    android:layout_centerHorizontal="true">

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/refresh_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:id="@+id/tv_pull_down_refresh"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:gravity="center"
                android:text="Weixin"
                android:textSize="20sp" />

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/my_recycler_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="20dp" />
        </LinearLayout>

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

</LinearLayout>

item_layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:gravity="center">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <ImageView
            android:id="@+id/iv_pic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"

            android:layout_marginTop="10dp"
            android:src="@mipmap/ic_launcher" />
        <TextView
            android:id="@+id/tv_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"

            android:layout_marginTop="30dp"
            android:layout_marginLeft="30dp"
            android:text="点击跳转"
            android:textSize="20sp" />

    </LinearLayout>

</LinearLayout>

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