Android 常用包的基本使用 - glide okhttp retrofit gson
准备工作
国内仓库设置
https://developer.aliyun.com/mirror/
https://jitpack.io/
入口配置文件-build.gradle buildscript { repositories { .... maven { url 'https://maven.aliyun.com/repository/public' } maven { url 'https://maven.aliyun.com/repository/central' } maven { url 'https://maven.aliyun.com/repository/gradle-plugin' } maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://jitpack.io' } .... .... allprojects { repositories { maven { url 'https://maven.aliyun.com/repository/public' } maven { url 'https://maven.aliyun.com/repository/central' } maven { url 'https://maven.aliyun.com/repository/gradle-plugin' } maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://jitpack.io' } google() mavenCentral() jcenter() // Warning: this repository is going to shut down soon } } ... setting.gradle 注释一下 //dependencyResolutionManagement { // repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS) // repositories { // google() // mavenCentral() // jcenter() // Warning: this repository is going to shut down soon // } //}
依赖添加
//glide implementation 'com.github.bumptech.glide:glide:4.12.0' annotationProcessor 'com.github.bumptech.glide:compiler:4.12.0'//注解注入模块 //http 请求 implementation("com.squareup.okhttp3:okhttp:4.9.2") //retrofit implementation 'com.squareup.retrofit2:retrofit:2.9.0' //json 解析 implementation 'com.google.code.gson:gson:2.8.8'
权限申请
<uses-permission android:name="android.permission.INTERNET" />
http请求的特殊设置
res/xml/config.xml
<?xml version="1.0" encoding="utf-8"?> <network-security-config> <base-config cleartextTrafficPermitted="true" /> </network-security-config>
.....
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:networkSecurityConfig="@xml/config"
....
Glide
官网
图片资源 https://huaban.com/
demo效果
xml布局
xml 代码 <?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"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <ImageView android:id="@+id/iv1" android:layout_width="200dp" android:layout_height="200dp" android:background="#F44336" /> <ImageView android:id="@+id/iv2" android:layout_width="200dp" android:layout_height="200dp" android:background="#4CAF50" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:orientation="horizontal"> <ImageView android:id="@+id/iv3" android:layout_width="200dp" android:layout_height="200dp" android:background="#2196F3" /> <ImageView android:id="@+id/iv4" android:layout_width="200dp" android:layout_height="200dp" android:background="#FFC107" /> </LinearLayout> </LinearLayout>
Act-java
java ---- @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_glide); //基本使用 ImageView iv1 = findViewById(R.id.iv1); String ImgUrl1 = "https://hbimg.huabanimg.com/dcc3f25f9834681095d5c1ac52c4918a0fdf497a34ef9-JU0zF9_fw658/format/webp"; Glide.with(this)//当前环境 context fragment view .load(ImgUrl1)//图片地址 .centerCrop()//缩放居中显示 .into(iv1);//显示图片的组件对象 //占位符 - 加载前 ，加载异常，加载资源异常的一个图片占位 ImageView iv2 = findViewById(R.id.iv2); String ImgUrl2 = "https://hbimg.huabanimg.com/5ff2935963b42de42d838ab221fe55ad5c3d8eaa4a313-v6XTjn_fw658/format/webp"; //一个 null 的个人资料 url 可能暗示这个用户没有设置头像，因此应该使用默认头像。 // 然而，null 也可能表明这个元数据根本就是不合法的，或者取不到。 默认情况下Glide将 null 作为错误处理，所以可以接受 null 的应用应当显式地设置一个 fallback Drawable // Glide.with(this)//当前环境 context fragment view // .load(ImgUrl2)//图片地址 // .placeholder(R.mipmap.ic_launcher)//加载前 // .error(new ColorDrawable(Color.RED))//加载资源失败 // .fallback(new ColorDrawable(Color.GREEN))//加载 资源为null // .into(iv2);//显示图片的组件对象 // ImgUrl2 = null;//fallback //可以 把系统同 设置放到 until里面，返回一个通用配置对象 RequestOptions requestOptions = new RequestOptions(); requestOptions .placeholder(R.mipmap.ic_launcher)//加载前 .error(new ColorDrawable(Color.RED))//加载资源失败 .fallback(new ColorDrawable(Color.BLUE))//加载 资源为null .centerCrop();//缩放 Glide.with(this)//当前环境 context fragment view .load(ImgUrl2)//图片地址 .apply(requestOptions)//加载前 .into(iv2);//显示图片的组件对象 //过渡效果 - transition listView 少用消耗性能 ImageView iv3 = findViewById(R.id.iv3); String ImgUrl3 = "https://hbimg.huabanimg.com/55b2ac82ab62732fb70f09715b90aac11e58648c23bd9-yratri_fw658/format/webp"; DrawableCrossFadeFactory factory = new DrawableCrossFadeFactory .Builder(3000)//时间 .setCrossFadeEnabled(true) .build(); //变换效果 - transform 改变图片大小，角度 Glide.with(this) // .asBitmap()// - BitmapTransitionOptions .load(ImgUrl3) .placeholder(R.mipmap.ic_launcher) //bitmap写法 // .transition(BitmapTransitionOptions.withCrossFade(factory)) //---- 普通写法 // .transition(DrawableTransitionOptions.withCrossFade(factory)) .transition(withCrossFade(factory)) // ---- 单独设置 // .transform(new CenterCrop())//缩放 // .transform(new CircleCrop())//圆角 // .transform(new RoundedCorners(40))//指定角度 的圆角 // .transform(new GranularRoundedCorners(0, 20, 100, 200))//指定四个角度 的圆角 // .transform(new Rotate(40))//指定角度 旋转 //多重变换 // .transform(new MultiTransformation(new CircleCrop(), new Rotate(40))) .transform(new CenterCrop(), new CircleCrop(), new Rotate(40))//简写 .into(iv3); //在 Application 模块中的使用 - 简写 // 创建moudle 然后build，在通过 GlideApp // GlideExtension + GlideOption 拓展方法的形式封装 多个方法 - 然后build ImageView iv4 = findViewById(R.id.iv4); String ImgUrl4 = "https://hbimg.huabanimg.com/8260d6ca8b6550d4aefb195e8ad92cb311ce222737276-4PQrrW_fw658/format/webp"; GlideApp.with(this) .load(ImgUrl4) .myPlaceholder()//拓展方法 // .miniThumb(400)//拓展方法 .into(iv4); }
拓展Module
Glide v4 : Generated API (muyangmin.github.io)
App拓展 - MyAppGlideMoudle.java import com.bumptech.glide.annotation.GlideModule; import com.bumptech.glide.module.AppGlideModule; @GlideModule public class MyAppGlideMoudle extends AppGlideModule { } GlideExtension 拓展 -MyAppGlideExtension.java import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import androidx.annotation.NonNull; import com.bumptech.glide.annotation.GlideExtension; import com.bumptech.glide.annotation.GlideOption; import com.bumptech.glide.request.BaseRequestOptions; import com.hw.demo.R; @GlideExtension public class MyAppGlideExtension { // Size of mini thumb in pixels. // private static final int MINI_THUMB_SIZE = 100; private MyAppGlideExtension() { } // utility class @NonNull @GlideOption public static BaseRequestOptions<?> miniThumb(BaseRequestOptions<?> options, int size) { return options .fitCenter() .override(size); } @NonNull @GlideOption public static BaseRequestOptions<?> myPlaceholder(BaseRequestOptions<?> options) { return options .centerCrop() .placeholder(R.mipmap.ic_launcher) .error(new ColorDrawable(Color.RED)) .error(new ColorDrawable(Color.BLUE)); } }
一定要build
build - make module
使用注意：
图片类型 - png jpeg
列表 使用 https://muyangmin.github.io/glide-docs-cn/doc/getting-started.html#%E5%9C%A8-listview-%E5%92%8C-recyclerview-%E4%B8%AD%E7%9A%84%E4%BD%BF%E7%94%A8
Okhttp3
官网
https://github.com/square/okhttp
测试资源网址
https://httpbin.org
https://www.wanandroid.com/blog/show/2
基本使用
xml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" android:orientation="vertical" android:gravity="center"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="getSync" android:text="同步 Get" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="getAsync" android:text="异步 Get" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="postSync" android:text="同步 Post" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="postAsyc" android:text="异步 Post" /> </LinearLayout>
java代码
private static final String TAG = "OkHttp"; public void getSync(View view) { //请求客户端对象 //request 对象 //call 对象 //response 对象 new Thread(new Runnable() {//Android 网络请求需要放到 子线程中 @Override public void run() { OkHttpClient okHttpClient = new OkHttpClient(); Request request = new Request.Builder() .url("https://www.httpbin.org/get?a=1&b=2") .build(); Call call = okHttpClient.newCall(request); try { Response response = call.execute(); Log.d(TAG, "getSync: " + response.body().string());//这里是 string 不是toString } catch (IOException exception) { exception.printStackTrace(); } } }).start(); } public void getAsync(View view) { OkHttpClient okHttpClient = new OkHttpClient(); Request request = new Request.Builder() .url("https://www.httpbin.org/get?a=1&b=2") .build(); Call call = okHttpClient.newCall(request); //异步使用 - enqueue call.enqueue(new Callback() { @Override public void onFailure(@NonNull Call call, @NonNull IOException e) { Log.d(TAG, "getSync: " + e.getMessage()); } @Override public void onResponse(@NonNull Call call, @NonNull Response response) throws IOException { if (response.isSuccessful()) {//判断http 请求成功 Log.d(TAG, "getAsync: " + response.body().string());//这里是 string 不是toString //注意这里是子线程 不能更新UI操作 //通过handerl bus looper 可以到主线程更新UI Looper.prepare();//启动 -准备发送消息到主线程 Toast.makeText(getApplicationContext(), "异步GET请求成功了".toString(), Toast.LENGTH_SHORT).show(); Looper.loop();//循环 } } }); } public void postSync(View view) { //请求客户端 client //请求对象 request + 请求体 requestBody //call 对象 //response对象 new Thread(new Runnable() { @Override public void run() { OkHttpClient okHttpClient = new OkHttpClient(); FormBody formBody = new FormBody.Builder() .add("username", "test") .add("psw", "123456") .build(); Request request = new Request.Builder() .url("https://httpbin.org/post?get=aaa&test=bbb") .post(formBody) .build(); Call call = okHttpClient.newCall(request); try { Response response = call.execute(); Log.d(TAG, "postSync: " + response.body().string()); } catch (IOException exception) { exception.printStackTrace(); } } }).start(); } public void postAsyc(View view) { OkHttpClient okHttpClient = new OkHttpClient(); FormBody formBody = new FormBody.Builder() .add("username", "test") .add("psw", "123456") .build(); Request request = new Request.Builder() .url("https://httpbin.org/post?get=aaa&test=bbb") .post(formBody) .build(); Call call = okHttpClient.newCall(request); call.enqueue(new Callback() { @Override public void onFailure(@NonNull Call call, @NonNull IOException e) { Log.d(TAG, "postAsyc: " + e.getMessage()); } @Override public void onResponse(@NonNull Call call, @NonNull Response response) throws IOException { Log.d(TAG, "postAsyc: " + response.body().string()); //注意这里是子线程 不能更新UI操作 //通过handerl bus looper 可以到主线程更新UI Looper.prepare();//启动 -准备发送消息到主线程 Toast.makeText(getApplicationContext(), "异步POST请求成功了".toString(), Toast.LENGTH_SHORT).show(); Looper.loop();//循环 } }); }
client 构造器 使用拦截器，缓存信息
多种请求体：文件上传，json提交
retrofit
