Glide 实现圆形图片 并动态旋转

一、添加Glide依赖

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

二、Glide提供了transform方法来实现图片的转化，animate方法来实现图片的动画。

1、看看实现总代码

// 下面代码写在activity中
iv_1 = (ImageView) findViewById(R.id.iv_1);
Glide.with(this)
.load(imgUrl)
.transform(new GlideCircleTransform(this))
.placeholder(R.drawable.img1)
.animate(mAnimator)
.into(iv_1);
// 由于glide具有缓存作用，当再次进入界面，如果没有下面的代码，就不会旋转了
iv_1.startAnimation(mAnimation);

1、Transform相关实现

public DrawableRequestBuilder<ModelType> transform(BitmapTransformation... transformations) {
return bitmapTransform(transformations);
}

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;

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();
// 要处理的bitmap对象
// 在X轴处理的效果，Shader.TileMode里有三种模式：CLAMP、MIRROR和REPETA
// 在Y轴处理的效果，Shader.TileMode里有三种模式：CLAMP、MIRROR和REPETA
paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
paint.setAntiAlias(true);
double r = (double) size / 2;
canvas.drawCircle((float) r, (float)r, (float)r, paint);
return result;
}

@Override
public String getId() {
return getClass().getName();
}
}

2、Animator 图片动画的实现

public DrawableRequestBuilder<ModelType> animate(ViewPropertyAnimation.Animator animator) {
super.animate(animator);
return this;
}

private ViewPropertyAnimation.Animator mAnimator = new ViewPropertyAnimation.Animator() {
@Override
public void animate(View view) {
Log.i("lvjie","Animator-->animate()...");
view.startAnimation(mAnimation);
}
};

private Animation mAnimation;

// 封装下面代码到一个方法中
mAnimation = AnimationUtils.loadAnimation(this, R.anim.img_animation);
LinearInterpolator lin = new LinearInterpolator();//设置动画匀速运动
mAnimation.setInterpolator(lin);

// img_animation.xml文件 该文件是在res/anim下
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<rotate
android:duration="12000"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="-1"
android:repeatMode="restart"
android:toDegrees="360" />
</set>

3、下面附上activity中的完整代码

public class GlideDemoActivity extends AppCompatActivity {

private String imgUrl = "http://r.v1.e.101.com/s/p/1016/847ed000400d4de098f434207ceeb099.jpg";

private ImageView iv_1;
private Animation mAnimation;

public static void startActivity(Context context){
Intent intent = new Intent(context, GlideDemoActivity.class);
context.startActivity(intent);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_glide_demo);

initView();
}

private void initView(){

mAnimation = AnimationUtils.loadAnimation(this, R.anim.img_animation);
LinearInterpolator lin = new LinearInterpolator();//设置动画匀速运动
mAnimation.setInterpolator(lin);

iv_1 = (ImageView) findViewById(R.id.iv_1);
Glide.with(this)
.load(imgUrl)
.transform(new GlideCircleTransform(this))
.placeholder(R.drawable.img1)
.animate(mAnimator)
.into(iv_1);
iv_1.startAnimation(mAnimation);
}

private ViewPropertyAnimation.Animator mAnimator = new ViewPropertyAnimation.Animator() {
@Override
public void animate(View view) {
Log.i("lvjie","Animator-->animate()...");
view.startAnimation(mAnimation);
}
};

}

下面看看具体相关图