Android最新Glide 4.0使用简介
Glide自v3.0到v4.0使用，发生了一些比较大的改变，使用方式和编程模型有了新的变化，这些变化，使得Glide的功能更加强大，性能更加优良，提供了开放的编程接口，便于开发者自定制，以适应自有项目的定制化开发。
本例给出一些最新Android Glide 4.0的新变化、新模型的简单使用方式。
写一个简单垂直线性布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context="zhangphil.phildemo.MainActivity">
<ImageView
android:id="@+id/image1"
android:layout_width="100dp"
android:layout_height="100dp" />
<ImageView
android:id="@+id/image2"
android:layout_width="100dp"
android:layout_height="100dp" />
<ImageView
android:id="@+id/image3"
android:layout_width="100dp"
android:layout_height="100dp" />
<ImageView
android:id="@+id/image4"
android:layout_width="100dp"
android:layout_height="100dp" />
</LinearLayout>
测试的MainActivity.java，在这里面有四个不同的新版Glide 4.0使用方式：
package zhangphil.phildemo;
import android.graphics.drawable.Drawable;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;
import com.bumptech.glide.Glide;
import com.bumptech.glide.Priority;
import com.bumptech.glide.RequestBuilder;
import com.bumptech.glide.load.DataSource;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.bumptech.glide.load.engine.GlideException;
import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions;
import com.bumptech.glide.request.RequestListener;
import com.bumptech.glide.request.RequestOptions;
import com.bumptech.glide.request.target.Target;
public class MainActivity extends AppCompatActivity {
private String url = "https://www.baidu.com/img/bd_logo1.png";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView image1 = (ImageView) findViewById(R.id.image1);
ImageView image2 = (ImageView) findViewById(R.id.image2);
ImageView image3 = (ImageView) findViewById(R.id.image3);
ImageView image4 = (ImageView) findViewById(R.id.image4);
load1(image1);
load2(image2);
load3(image3);
load4(image4);
}
private void load1(ImageView image) {
Glide.with(this)
.load(url)
.apply(new RequestOptions().circleCrop().placeholder(R.mipmap.ic_launcher))
.transition(new DrawableTransitionOptions().crossFade(2000))
.into(image);
}
private void load2(ImageView image) {
RequestOptions options = new RequestOptions()
.centerCrop()
.placeholder(R.mipmap.ic_launcher_round)
.error(android.R.drawable.stat_notify_error)
.priority(Priority.HIGH)
//.skipMemoryCache(true)
.diskCacheStrategy(DiskCacheStrategy.AUTOMATIC);
Glide.with(this)
.load(url)
.apply(options)
.into(image);
}
private void load3(ImageView image) {
Glide.with(this)
.load(url)
.listener(new RequestListener<Drawable>() {
@Override
public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
return false;
}
@Override
public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
return false;
}
})
.apply(new RequestOptions().centerInside())
.thumbnail(Glide.with(this).load(R.mipmap.ic_launcher))
.into(image);
}
private void load4(ImageView image) {
RequestBuilder<Drawable> mRequestBuilder = Glide.with(this).load(url);
mRequestBuilder.listener(new RequestListener<Drawable>() {
@Override
public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
return false;
}
@Override
public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
return false;
}
}).transition(new DrawableTransitionOptions().crossFade(2000))
.apply(new RequestOptions().circleCrop())
.into(image);
}
}
不要忘了添加读写存储和访问网络的权限：
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
附录：
1，Glide在github上的开源项目主页：https://github.com/bumptech/glide
