第一行代码 3-2-2 软件也要拼脸蛋-UI界面-更强大的滚动条- 卡片

2022-10-11 08:35:39

 <LinearLayout

            android:orientation="vertical"

            android:layout_width="match_parent"

            android:layout_height="wrap_content">

            <android.support.v7.widget.CardView

                android:layout_width="match_parent"

                android:layout_height="wrap_content"

                android:layout_marginBottom="15dp"

                android:layout_marginLeft="15dp"

                android:layout_marginRight="15dp"

                android:layout_marginTop="35dp"

                app:cardCornerRadius="4dp">

                <TextView

                    android:id="@+id/fruit_content_text"

                    android:layout_width="match_parent"

                    android:layout_height="wrap_content"

                    android:layout_margin="10dp" />

            </android.support.v7.widget.CardView>

        </LinearLayout>

dependencies {

    compile fileTree(dir: 'libs', include: ['*.jar'])

    compile 'com.android.support:appcompat-v7:24.2.1'

    testCompile 'junit:junit:4.12'

    compile 'com.android.support:design:24.2.1'

    compile 'de.hdodenhof:circleimageview:2.1.0'

    compile 'com.android.support:recyclerview-v7:24.2.1'

    compile 'com.android.support:cardview-v7:24.2.1'

    compile 'com.github.bumptech.glide:glide:3.7.0'

}

<?xml version="1.0" encoding="utf-8"?>

<android.support.v4.widget.DrawerLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/drawer_layout"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <android.support.design.widget.CoordinatorLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent">

        <android.support.design.widget.AppBarLayout

            android:layout_width="match_parent"

            android:layout_height="wrap_content">

            <android.support.v7.widget.Toolbar

                android:id="@+id/toolbar"

                android:layout_width="match_parent"

                android:layout_height="?attr/actionBarSize"

                android:background="?attr/colorPrimary"

                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"

                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"

                app:layout_scrollFlags="scroll|enterAlways|snap" />

        </android.support.design.widget.AppBarLayout>

        <android.support.v4.widget.SwipeRefreshLayout

            android:id="@+id/swipe_refresh"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <android.support.v7.widget.RecyclerView

                android:id="@+id/recycler_view"

                android:layout_width="match_parent"

                android:layout_height="match_parent" />

        </android.support.v4.widget.SwipeRefreshLayout>

        <android.support.design.widget.FloatingActionButton

            android:id="@+id/fab"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="bottom|end"

            android:layout_margin="16dp"

            android:src="@drawable/ic_done" />

    </android.support.design.widget.CoordinatorLayout>

    <android.support.design.widget.NavigationView

        android:id="@+id/nav_view"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_gravity="start"

        app:headerLayout="@layout/nav_header"

        app:menu="@menu/nav_menu" />

</android.support.v4.widget.DrawerLayout>

public class Fruit {

    private String name;

    private int imageId;

    public Fruit(String name, int imageId) {

        this.name = name;

        this.imageId = imageId;

    }

    public String getName() {

        return name;

    }

    public int getImageId() {

        return imageId;

    }

}

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.CardView

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:layout_margin="5dp"

    app:cardCornerRadius="4dp">

    <LinearLayout

        android:orientation="vertical"

        android:layout_width="match_parent"

        android:layout_height="wrap_content">

        <ImageView

            android:id="@+id/fruit_image"

            android:layout_width="match_parent"

            android:layout_height="100dp"

            android:scaleType="centerCrop" />

        <TextView

            android:id="@+id/fruit_name"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center_horizontal"

            android:layout_margin="5dp"

            android:textSize="16sp" />

    </LinearLayout>

</android.support.v7.widget.CardView>

package com.example.materialtest;

import android.content.Context;

import android.content.Intent;

import android.support.v7.widget.CardView;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.TextView;

import com.bumptech.glide.Glide;

import java.util.List;

public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder>{

    private static final String TAG = "FruitAdapter";

    private Context mContext;

    private List<Fruit> mFruitList;

    static class ViewHolder extends RecyclerView.ViewHolder {

        CardView cardView;

        ImageView fruitImage;

        TextView fruitName;

        public ViewHolder(View view) {

            super(view);

            cardView = (CardView) view;

            fruitImage = (ImageView) view.findViewById(R.id.fruit_image);

            fruitName = (TextView) view.findViewById(R.id.fruit_name);

        }

    }

    public FruitAdapter(List<Fruit> fruitList) {

        mFruitList = fruitList;

    }

    @Override

    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        if (mContext == null) {

            mContext = parent.getContext();

        }

        View view = LayoutInflater.from(mContext).inflate(R.layout.fruit_item, parent, false);

        final ViewHolder holder = new ViewHolder(view);

        holder.cardView.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                int position = holder.getAdapterPosition();

                Fruit fruit = mFruitList.get(position);

                Intent intent = new Intent(mContext, FruitActivity.class);

                intent.putExtra(FruitActivity.FRUIT_NAME, fruit.getName());

                intent.putExtra(FruitActivity.FRUIT_IMAGE_ID, fruit.getImageId());

                mContext.startActivity(intent);

            }

        });

        return holder;

    }

    @Override

    public void onBindViewHolder(ViewHolder holder, int position) {

        Fruit fruit = mFruitList.get(position);

        holder.fruitName.setText(fruit.getName());

        Glide.with(mContext).load(fruit.getImageId()).into(holder.fruitImage);

    }

    @Override

    public int getItemCount() {

        return mFruitList.size();

    }

}

 private DrawerLayout mDrawerLayout;

    private Fruit[] fruits = {new Fruit("Apple", R.drawable.apple), new Fruit("Banana", R.drawable.banana),

            new Fruit("Orange", R.drawable.orange), new Fruit("Watermelon", R.drawable.watermelon),

            new Fruit("Pear", R.drawable.pear), new Fruit("Grape", R.drawable.grape),

            new Fruit("Pineapple", R.drawable.pineapple), new Fruit("Strawberry", R.drawable.strawberry),

            new Fruit("Cherry", R.drawable.cherry), new Fruit("Mango", R.drawable.mango)};

    private List<Fruit> fruitList = new ArrayList<>();

    private FruitAdapter adapter;

 initFruits();
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        GridLayoutManager layoutManager = new GridLayoutManager(this, 2);
        recyclerView.setLayoutManager(layoutManager);
        adapter = new FruitAdapter(fruitList);
        recyclerView.setAdapter(adapter);

  private void initFruits() {

        fruitList.clear();

        for (int i = 0; i < 50; i++) {

            Random random = new Random();

            int index = random.nextInt(fruits.length);

            fruitList.add(fruits[index]);

        }

    }

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