Glide加载动态图片

首先我们先要去依赖一个githup:bumptech:glide:glide:3.7.0包；

使用Glide结合列表的样式进行图片加载：

1) 如果使用的是ListView，可以直接在Adapter的getView方法中使用：

@Override public View getView(int position, View convertView, ViewGroup parent) { if (null == convertView) { //..... } Glide .with(context) .load(imageUrls[position]) .into(holder.imageView); return convertView; }

2) 如果使用的是RecyclerView，可以在Adapter的onBindViewHolder方法中使用：

@Override public void onBindViewHolder(RVViewHolder holder, int position) { Glide.with(MainActivity.this) .load(args[position]) .into(holder.imageView); }

3) 当加载网络图片时，由于加载过程中图片未能及时显示，此时可能需要设置等待时的图片，通过placeHolder()方法：

Glide .with(context) .load(UsageExampleListViewAdapter.eatFoodyImages[0]) .placeholder(R.mipmap.ic_launcher) // can also be a drawable .into(imageViewPlaceholder);

4)当加载图片失败时，通过error(Drawable drawable)方法设置加载失败后的图片显示：

Glide .with(context) .load("http://futurestud.io/non_existing_image.png") .error(R.mipmap.future_studio_launcher) // will be displayed if the image cannot be loaded .into(imageViewError);

5) 图片的缩放，centerCrop()和fitCenter()：

//使用centerCrop是利用图片图填充ImageView设置的大小，如果ImageView的//Height是match_parent则图片就会被拉伸填充Glide.with(MainActivity.this) .load(args[position]) .centerCrop() .into(holder.imageView);//使用fitCenter即缩放图像让图像都测量出来等于或小于 ImageView 的边界范围//该图像将会完全显示，但可能不会填满整个 ImageView。Glide.with(MainActivity.this) .load(args[position]) .fitCenter() .into(holder.imageView);

6) 显示gif动画：

Glide .with( context ) .load( gifUrl ) .asGif() //判断加载的url资源是否为gif格式的资源 .error( R.drawable.full_cake ) .into( imageViewGif );

7) 显示本地视频

String filePath = "/storage/emulated/0/Pictures/example_video.mp4";Glide .with( context ) .load( Uri.fromFile( new File( filePath ) ) ) .into( imageViewGifAsBitmap );

8) 缓存策略：

Glide .with( context ) .load( Images[0] ) .skipMemoryCache( true ) //跳过内存缓存 .into( imageViewInternet );Glide .with( context ) .load( images[0] ) .diskCacheStrategy( DiskCacheStrategy.NONE ) //跳过硬盘缓存 .into( imageViewInternet );

• DiskCacheStrategy.NONE 什么都不缓存
• DiskCacheStrategy.SOURCE 仅仅只缓存原来的全分辨率的图像
• DiskCacheStrategy.RESULT 仅仅缓存最终的图像，即降低分辨率后的（或者是转换后的）
• DiskCacheStrategy.ALL 缓存所有版本的图像（默认行为）

9) 优先级，设置图片加载的顺序：

Priority.LOWPriority.NORMALPriority.HIGHPriority.IMMEDIATE private void loadImageWithHighPriority() { Glide .with( context ) .load( mages[0] ) .priority( Priority.HIGH ) .into( imageViewHero );}private void loadImagesWithLowPriority() { Glide .with( context ) .load( images[1] ) .priority( Priority.LOW ) .into( imageViewLowPrioLeft ); Glide .with( context ) .load( images[2] ) .priority( Priority.LOW ) .into( imageViewLowPrioRight );}

10) 当不需要将加载的资源直接放入到ImageView中而是想获取资源的Bitmap对象：

//括号中的300,600代表宽和高但是未有作用SimpleTarget target = new SimpleTarget<Bitmap>(300,600) { @Override public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) { holder.imageView.setImageBitmap(resource); } }; Glide.with(MainActivity.this) .load(args[position]) .asBitmap() .into(target);

11) 集成网络栈(okHttp,Volley)：

dependencies { // your other dependencies // ... // Glide compile 'com.github.bumptech.glide:glide:3.6.1' // Glide's OkHttp Integration compile 'com.github.bumptech.glide:okhttp-integration:1.3.1@aar' compile 'com.squareup.okhttp:okhttp:2.5.0'}dependencies { // your other dependencies // ... // Glide compile 'com.github.bumptech.glide:glide:3.6.1' // Glide's Volley Integration compile 'com.github.bumptech.glide:volley-integration:1.3.1@aar' compile 'com.mcxiaoke.volley:library:1.0.8'}

好了，以上就是Glide动态加载图片的方法，下面开始本文的正文：

需求

Glide下载图片并切圆角或圆形,但图片有大有小,图片不能改变,切圆还好说,但是切圆角就会发现图片小的会比图片大的要圆
搜一下 " Glide动态加载圆形图片跟圆角图片 " 就会出现很多文章,但这些都不能解决上面的问题 怎样能 Glide动态加载不同大小的图片切圆形图片跟圆角图片呢?

解决很简单

既然是图片大小不一致而导致图片切出来不一样,那就把图片变的一样大小不就可以吗

申明一下我的代码也是在Glide动态加载圆形图片跟圆角图片搜出来的代码基础上修改的. 下面就是代码了.

build.gradle

apply plugin: 'com.android.application'android { compileSdkVersion 26 buildToolsVersion "26.0.2" defaultConfig { applicationId "cn.xm.weidongjian.glidedemo" minSdkVersion 15 targetSdkVersion 26 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } debug { minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } }}dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:appcompat-v7:26.1.0' compile 'com.github.bumptech.glide:glide:3.6.1'}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="正常图片" android:id="@+id/button" android:layout_alignParentTop="true" android:layout_centerHorizontal="true"/> <ImageView android:layout_width="72dp" android:layout_height="72dp" android:id="@+id/imageView" android:scaleType="fitCenter" android:layout_below="@+id/button" android:layout_alignRight="@+id/button" android:layout_alignEnd="@+id/button" android:layout_marginTop="150dp"/> <ImageView android:layout_width="72dp" android:layout_height="72dp" android:id="@+id/imageView2" android:scaleType="fitCenter" android:layout_below="@+id/imageView" android:layout_alignRight="@+id/imageView" android:layout_alignEnd="@+id/imageView" android:layout_marginTop="5dp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="圆角图片" android:id="@+id/button2" android:layout_below="@+id/button" android:layout_alignLeft="@+id/button" android:layout_alignRight="@+id/imageView" android:layout_alignEnd="@+id/imageView"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="大圆角图片" android:id="@+id/button3" android:layout_below="@+id/button2" android:layout_alignLeft="@+id/button2" android:layout_alignStart="@+id/button2"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="圆形图片" android:id="@+id/button4" android:layout_below="@+id/button3" android:layout_alignLeft="@+id/button" android:layout_alignRight="@+id/button3" android:layout_alignEnd="@+id/button3"/></RelativeLayout>

MainActivity

package cn.xm.weidongjian.glidedemo;import android.content.Context;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.View.OnClickListener;import android.widget.ImageView;import com.bumptech.glide.Glide;import com.bumptech.glide.RequestManager;public class MainActivity extends AppCompatActivity implements OnClickListener { private ImageView imageView; private RequestManager glideRequest; private Context context = this; private ImageView imageView2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); init(); } private void init() { findViewById(R.id.button).setOnClickListener(this); findViewById(R.id.button2).setOnClickListener(this); findViewById(R.id.button3).setOnClickListener(this); findViewById(R.id.button4).setOnClickListener(this); imageView = (ImageView) findViewById(R.id.imageView); imageView2 = (ImageView) findViewById(R.id.imageView2); glideRequest = Glide.with(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.button: glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1704146358.png").into(imageView); glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1716089900.png").into(imageView2); break; case R.id.button2: glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1704146358.png").transform(new GlideRoundTransform(context)).into(imageView); glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1716089900.png").transform(new GlideRoundTransform(context)).into(imageView2); break; case R.id.button3: glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1704146358.png").transform(new GlideRoundTransform(context, 7)).into(imageView); glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1716089900.png").transform(new GlideRoundTransform(context, 7)).into(imageView2); break; case R.id.button4: glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1704146358.png").transform(new GlideCircleTransform(context)).into(imageView); glideRequest.load("http://androidop.le890.com/hma/upload/2016/10/11/1716089900.png").transform(new GlideCircleTransform(context)).into(imageView2); break; } }}

GlideCircleTransform

package cn.xm.weidongjian.glidedemo;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapShader;import android.graphics.Canvas;import android.graphics.Paint;import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;public class GlideCircleTransform extends BitmapTransformation { public GlideCircleTransform(Context context) { super(context); } @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) { return circleCrop(pool, toTransform); } private static Bitmap circleCrop(BitmapPool pool, Bitmap source) { if (source == null) return null; int size = Math.min(source.getWidth(), source.getHeight()); int x = (source.getWidth() - size) / 2; int y = (source.getHeight() - size) / 2; // TODO this could be acquired from the pool too Bitmap squared = Bitmap.createBitmap(source, x, y, size, size); Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888); if (result == null) { result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888); } Canvas canvas = new Canvas(result); Paint paint = new Paint(); paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP)); paint.setAntiAlias(true); float r = size / 2f; canvas.drawCircle(r, r, r, paint); return result; } @Override public String getId() { return getClass().getName(); }}

GlideRoundTransform

package cn.xm.weidongjian.glidedemo;import android.content.Context;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.BitmapShader;import android.graphics.Canvas;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.RectF;import android.util.Log;import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;public class GlideRoundTransform extends BitmapTransformation { private static float radius = 0f; public GlideRoundTransform(Context context) { this(context, 4); } public GlideRoundTransform(Context context, int dp) { super(context); this.radius = Resources.getSystem().getDisplayMetrics().density * dp; } @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) { return roundCrop(pool, toTransform); } private static Bitmap roundCrop(BitmapPool pool, Bitmap source) { if (source == null) return null; Bitmap bitmap = changeBitmapSize(source); Bitmap result = pool.get(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_4444); if (result == null) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); result = Bitmap.createBitmap(width,height, Bitmap.Config.ARGB_4444); } Canvas canvas = new Canvas(result); Paint paint = new Paint(); paint.setShader(new BitmapShader(bitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP)); paint.setAntiAlias(true); RectF rectF = new RectF(0f, 0f, bitmap.getWidth(), bitmap.getHeight()); canvas.drawRoundRect(rectF, radius, radius, paint); return result; } public static Bitmap changeBitmapSize(Bitmap bitmap) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); //设置想要的大小 int newWidth=72; int newHeight=72; //计算压缩的比率 float scaleWidth=((float)newWidth)/width; float scaleHeight=((float)newHeight)/height; //获取想要缩放的matrix Matrix matrix = new Matrix(); matrix.postScale(scaleWidth,scaleHeight); //获取新的bitmap bitmap=Bitmap.createBitmap(bitmap,0,0,width,height,matrix,true); bitmap.getWidth(); bitmap.getHeight(); Log.e("newWidth","newWidth"+bitmap.getWidth()); Log.e("newHeight","newHeight"+bitmap.getHeight()); return bitmap; } @Override public String getId() { return getClass().getName() + Math.round(radius); }}

很简单吧,就是用changeBitmapSize方法把图片压缩到72*72的这样图片都一样大了,在切就不会出现切出来的图片效果不一样了

最后代码(dome)

github地址: https://github.com/liang9/Imagedome

本地下载地址：http://xiazai.jb51.net/201711/yuanma/Imagedome(jb51.net).rar

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对的支持。