1 功能说明

??????? 在上次微信界面设计的基础上，对有recycleView的页面进行点击跳转设计；
比如，某一tab页是联系人列表，则点击某一行能跳转到联系人详情页面。并且设置一个返回按钮可以返回跳转。

2 跳转方法

我使用通过class跳转的方法

try {
	Intent intent = new Intent();
	//(当前Activity，目标Activity)
	intent.setClass(MainActivity.this, Class.forName("com.cx.testdemo.TestActivity"));
	startActivity(intent);
} catch (ClassNotFoundException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
}

?除此之外还有通过Activity的name跳转

Intent intent = new Intent();
//(当前Activity，目标Activity)
intent.setClass(MainActivity.this, TestActivity.class);
startActivity(intent);

为Activity设置Action，通过Action跳转

Intent intent = new Intent();
//(声明中的Action)
intent.setAction("");
//(声明中的Category)
intent.addCategory("");
startActivity(intent);

上面的Action和Category应该与Activity声明中设置的Action和Category相同

<activity android:name="">
	<!-- intent-filter：过滤器一 -->
      <intent-filter >
		<!-- action随便设置，但必须保证唯一 -->
            <action android:name=""/>
            <category android:name=""/>
      </intent-filter>
</activity>

3具体代码

MailActivitiy

package com.example.mywork;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MailActivity extends AppCompatActivity {
    //好友名字
    private TextView friend_name;
    //好友信息
    private TextView friend_info;
    //好友照片
    private ImageView friend_pic;
    //返回上个页面按钮
    private Button btn_back;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.friend2);
        init();
        setListeners();
    }

    public void init() {
        friend_name = (TextView) findViewById(R.id.friend_name);
        friend_info = (TextView) findViewById(R.id.friend_info);
        friend_pic = (ImageView) findViewById(R.id.friend_pic);
        btn_back = (Button) findViewById(R.id.btn_back);
    }

    private void setListeners() {
        btn_back.setOnClickListener(backMain);
    }

    private Button.OnClickListener backMain = new Button.OnClickListener() {
        @Override
        public void onClick(View arg0) {
            MailActivity.this.finish();
        }
    };

}

布局配置文件friend2

package com.example.mywork;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MailActivity extends AppCompatActivity {
    //好友名字
    private TextView friend_name;
    //好友信息
    private TextView friend_info;
    //好友照片
    private ImageView friend_pic;
    //返回上个页面按钮
    private Button btn_back;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.friend2);
        init();
        setListeners();
    }

    public void init() {
        friend_name = (TextView) findViewById(R.id.friend_name);
        friend_info = (TextView) findViewById(R.id.friend_info);
        friend_pic = (ImageView) findViewById(R.id.friend_pic);
        btn_back = (Button) findViewById(R.id.btn_back);
    }

    private void setListeners() {
        btn_back.setOnClickListener(backMain);
    }

    private Button.OnClickListener backMain = new Button.OnClickListener() {
        @Override
        public void onClick(View arg0) {
            MailActivity.this.finish();
        }
    };

}

?修改AndroidManifest.xml

添加

<activity
    android:name=".MailActivity"
    >
</activity>

修改CollectRecycleAdapter

@Override
    public void onBindViewHolder(myViewHodler holder, int position) {
        //根据点击位置绑定数据
        final GoodsEntity data = goodsEntityList.get(position);
        //        holder.mItemGoodsImg;
        holder.mItemGoodsName.setText(data.goodsName);//获取实体类中的name字段并设置
        holder.mItemGoodsPrice.setText(data.goodsPrice);//获取实体类中的price字段并设置
        //实现点击功能
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(context, "您点击的联系人是：" + data.goodsName, Toast.LENGTH_SHORT).show();
                Intent intent = new Intent();
                intent.setClass(context,MailActivity.class);
                context.startActivity(intent);
            }
        });
    }

添加跳转功能