blocks|key|669862|text|可悲的是，我不认为有。Matrix类负责所有图像操作，无论是旋转、缩小/增长、倾斜等。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|669863|http://developer.android.com/reference/android/graphics/Matrix.html|669864|我很抱歉，但我想不出别的办法。也许其他人也能做到，但在我不得不操纵图像的时候，我使用了Matrix。|669865|祝你好运！|669866|entityMap|0|LINK|mutability|MUTABLE|url^0|B|6|0|0|1V|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@$9|W|A|X|1|Y]]|E|$]]|$1|H|3|I|5|6|7|Z|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|10|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|G]]]]

Sadly, I don't think there is. The <code>Matrix</code> class is responsible for all image manipulations, whether it's rotating, shrinking/growing, skewing, etc.

<a href="http://developer.android.com/reference/android/graphics/Matrix.html" rel="nofollow">http://developer.android.com/reference/android/graphics/Matrix.html</a>

My apologies, but I can't think of an alternative. Maybe someone else might be able to, but the times I've had to manipulate an image I've used a Matrix.

Best of luck!

blocks|key|455802|text|另一种可能的解决方案是创建您自己的自定义图像视图(比如RotateableImageView+extends+ImageView+)...and覆盖onDraw()，以便在重绘到画布之前旋转画布/位图。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|455803|但是，如果您打算仅旋转图像视图的单个实例，则您的解决方案应该足够好。|455804|entityMap^0|R|11|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

Another possible solution is to create your own custom Image view(say <code>RotateableImageView extends ImageView</code> )...and override the onDraw() to rotate either the canvas/bitmaps before redering on to the canvas.Don't forget to restore the canvas back.

But if you are going to rotate only a single instance of image view,your solution should be good enough.

blocks|key|455882|text|有两种方法可以做到这点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|455883|1使用Matrix创建新的位图：|offset|length|style|CODE|455884|imageView+=+(ImageView)+findViewById(R.id.imageView);
Bitmap+myImg+=+BitmapFactory.decodeResource(getResources(),+R.drawable.image);

Matrix+matrix+=+new+Matrix();
matrix.postRotate(30);

Bitmap+rotated+=+Bitmap.createBitmap(myImg,+0,+0,+myImg.getWidth(),+myImg.getHeight(),
++++++++matrix,+true);

imageView.setImageBitmap(rotated);|code-block|syntax|javascript|455885|2在要旋转的View上使用动画，并确保动画设置为fillAfter=true、duration=0和fromDegrees=toDgrees|455886|+<?xml+version="1.0"+encoding="utf-8"?>
<rotate
++xmlns:android="http://schemas.android.com/apk/res/android"
++android:fromDegrees="45"
++android:toDegrees="45"
++android:pivotX="50%25"
++android:pivotY="50%25"
++android:duration="0"
++android:startOffset="0"
/>|455887|并在代码中膨胀动画：|455888|Animation+rotation+=+AnimationUtils.loadAnimation(this,+R.anim.rotation);
myView.startAnimation(rotation);|455889|entityMap^0|0|3|6|0|0|6|4|O|E|13|A|1E|K|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|11|8|@$D|12|E|13|F|G]|$D|14|E|15|F|G]|$D|16|E|17|F|G]|$D|18|E|19|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|1A|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|A|$]]|$1|S|3|T|5|J|7|1C|8|@]|9|@]|A|$K|L]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|V|$]]

There are two ways to do that:

1 Using <code>Matrix</code> to create a new bitmap:

<pre><code>imageView = (ImageView) findViewById(R.id.imageView);
Bitmap myImg = BitmapFactory.decodeResource(getResources(), R.drawable.image);

Matrix matrix = new Matrix();
matrix.postRotate(30);

Bitmap rotated = Bitmap.createBitmap(myImg, 0, 0, myImg.getWidth(), myImg.getHeight(),
 matrix, true);

imageView.setImageBitmap(rotated);
</code></pre>

2 use <code>RotateAnimation</code> on the <code>View</code> you want to Rotate, and make sure the Animation set to <code>fillAfter=true</code>, <code>duration=0</code>, and <code>fromDegrees=toDgrees</code>

<pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;rotate
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:fromDegrees="45"
 android:toDegrees="45"
 android:pivotX="50%"
 android:pivotY="50%"
 android:duration="0"
 android:startOffset="0"
/&gt;
</code></pre>

and Inflate the Animation in code:

<pre><code>Animation rotation = AnimationUtils.loadAnimation(this, R.anim.rotation);
myView.startAnimation(rotation);
</code></pre>

blocks|key|455953|text|在自定义视图上尝试此操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|455954|public+class+DrawView+extends+View+{


++++public+DrawView(Context+context,AttributeSet+attributeSet){
++++++++super(context,+attributeSet);
++++}

++++@Override
++++public+void+onDraw(Canvas+canvas)+{
++++++++/*Canvas+c=new+Canvas(BitmapFactory.decodeResource(getResources(),+R.drawable.new_minute1)++++);

++++++++c.rotate(45);*/

++++++++canvas.drawBitmap(BitmapFactory.decodeResource(getResources(),+R.drawable.new_minute1),+0,+0,+null);
++++++++canvas.rotate(45);
++++}
}|code-block|syntax|javascript|455955|​|455956|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

try this on a custom view

<pre><code>public class DrawView extends View {


 public DrawView(Context context,AttributeSet attributeSet){
 super(context, attributeSet);
 }

 @Override
 public void onDraw(Canvas canvas) {
 /*Canvas c=new Canvas(BitmapFactory.decodeResource(getResources(), R.drawable.new_minute1) );

 c.rotate(45);*/

 canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.new_minute1), 0, 0, null);
 canvas.rotate(45);
 }
}
</code></pre>

blocks|key|455969|text|使用API>=11的mImageView.setRotation(angle)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|455970|entityMap^0|A|T|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<code>mImageView.setRotation(angle)</code> with API>=11

blocks|key|456029|text|如果您支持API+11或更高版本，则只需使用以下XML属性：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456030|android:rotation="90"|code-block|syntax|javascript|456031|它可能无法在Android+Studio+xml预览中正确显示，但它可以正常工作。|456032|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you're supporting API 11 or higher, you can just use the following XML attribute:

<pre><code>android:rotation="90"
</code></pre>

It might not display correctly in Android Studio xml preview, but it works as expected.

blocks|key|456079|text|没有矩阵和动画：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456080|{
++++img_view+=+(ImageView)+findViewById(R.id.imageView);
++++rotate+=+new+RotateAnimation(0+,300);
++++rotate.setDuration(500);
++++img_view.startAnimation(rotate);
}|code-block|syntax|javascript|456081|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

without matrix and animated:

<pre><code>{
 img_view = (ImageView) findViewById(R.id.imageView);
 rotate = new RotateAnimation(0 ,300);
 rotate.setDuration(500);
 img_view.startAnimation(rotate);
}
</code></pre>

blocks|key|670354|text|只需在您的onactivityResult中编写以下代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|670355|++++++++++++Bitmap+yourSelectedImage=+BitmapFactory.decodeFile(filePath);
++++++++++++Matrix+mat+=+new+Matrix();
++++++++++++mat.postRotate((270));+//degree+how+much+you+rotate+i+rotate+270
++++++++++++Bitmap+bMapRotate=Bitmap.createBitmap(yourSelectedImage,+0,0,yourSelectedImage.getWidth(),yourSelectedImage.getHeight(),+mat,+true);
++++++++++++image.setImageBitmap(bMapRotate);
++++++++++++Drawable+d=new+BitmapDrawable(yourSelectedImage);
++++++++++++image.setBackground(d);+|code-block|syntax|javascript|670356|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

just write this in your onactivityResult

<pre><code> Bitmap yourSelectedImage= BitmapFactory.decodeFile(filePath);
 Matrix mat = new Matrix();
 mat.postRotate((270)); //degree how much you rotate i rotate 270
 Bitmap bMapRotate=Bitmap.createBitmap(yourSelectedImage, 0,0,yourSelectedImage.getWidth(),yourSelectedImage.getHeight(), mat, true);
 image.setImageBitmap(bMapRotate);
 Drawable d=new BitmapDrawable(yourSelectedImage);
 image.setBackground(d); 
</code></pre>

blocks|key|670379|text|尝试这段代码100%25工作；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|670380|在rotate按钮上，单击write+this+code：|670381|++++++++@Override
++++++++public+void+onClick(View+view)+{
++++++++++++if(bitmap==null){
++++++++++++++++Toast.makeText(getApplicationContext(),+"Image+photo+is+not+yet+set",+Toast.LENGTH_LONG).show();
++++++++++++}
++++++++++++else+{
++++++++++++++++Matrix+matrix+=+new+Matrix();
++++++++++++++++ivImageProduct.setScaleType(ImageView.ScaleType.MATRIX);+++//required
++++++++++++++++matrix.postRotate(90,ivImageProduct.getDrawable().getBounds().width()/2,ivImageProduct.getDrawable().getBounds().height()/2);
++++++++++++++++Bitmap+bmp=Bitmap.createBitmap(bitmap,+0,+0,bitmap.getWidth(),+bitmap.getHeight(),+matrix,+true);
++++++++++++++++bitmap.recycle();
++++++++++++++++bitmap=bmp;
++++++++++++++++ivImageProduct.setImageBitmap(bitmap);
++++++++++++}
++++++++}|code-block|syntax|javascript|670382|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Try this code 100% working;

On rotate button click write this code:

<pre><code> @Override
 public void onClick(View view) {
 if(bitmap==null){
 Toast.makeText(getApplicationContext(), "Image photo is not yet set", Toast.LENGTH_LONG).show();
 }
 else {
 Matrix matrix = new Matrix();
 ivImageProduct.setScaleType(ImageView.ScaleType.MATRIX); //required
 matrix.postRotate(90,ivImageProduct.getDrawable().getBounds().width()/2,ivImageProduct.getDrawable().getBounds().height()/2);
 Bitmap bmp=Bitmap.createBitmap(bitmap, 0, 0,bitmap.getWidth(), bitmap.getHeight(), matrix, true);
 bitmap.recycle();
 bitmap=bmp;
 ivImageProduct.setImageBitmap(bitmap);
 }
 }
</code></pre>

blocks|key|456176|text|如果只想直观地旋转视图，可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456177|iv.setRotation(float)|code-block|syntax|javascript|456178|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you only want to rotate the view visually you can use: 

<pre><code>iv.setRotation(float)
</code></pre>

blocks|key|456226|text|与其将图像转换为位图，然后旋转它，不如像下面的代码那样直接旋转图像视图。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456227|ImageView+myImageView+=+(ImageView)findViewById(R.id.my_imageview);

AnimationSet+animSet+=+new+AnimationSet(true);
animSet.setInterpolator(new+DecelerateInterpolator());
animSet.setFillAfter(true);
animSet.setFillEnabled(true);

final+RotateAnimation+animRotate+=+new+RotateAnimation(0.0f,+-90.0f,
++++RotateAnimation.RELATIVE_TO_SELF,+0.5f,+
++++RotateAnimation.RELATIVE_TO_SELF,+0.5f);

animRotate.setDuration(1500);
animRotate.setFillAfter(true);
animSet.addAnimation(animRotate);

myImageView.startAnimation(animSet);|code-block|syntax|javascript|456228|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Rather than convert image to bitmap and then rotate it try to rotate direct image view like below code.

<pre><code>ImageView myImageView = (ImageView)findViewById(R.id.my_imageview);

AnimationSet animSet = new AnimationSet(true);
animSet.setInterpolator(new DecelerateInterpolator());
animSet.setFillAfter(true);
animSet.setFillEnabled(true);

final RotateAnimation animRotate = new RotateAnimation(0.0f, -90.0f,
 RotateAnimation.RELATIVE_TO_SELF, 0.5f, 
 RotateAnimation.RELATIVE_TO_SELF, 0.5f);

animRotate.setDuration(1500);
animRotate.setFillAfter(true);
animSet.addAnimation(animRotate);

myImageView.startAnimation(animSet);
</code></pre>

blocks|key|456275|text|如果需要连续旋转图像视图，请遵循以下答案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456276|int+i=0;|code-block|syntax|javascript|456277|如果单击了旋转按钮|456278|imageView.setRotation(i%2B90);
i=i%2B90;|456279|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Follow the below answer for continuous rotation of an imageview

<pre><code>int i=0;
</code></pre>

If rotate button clicked

<pre><code>imageView.setRotation(i+90);
i=i+90;
</code></pre>

blocks|key|456313|text|我认为最好的方法是:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456314|int+angle+=+0;
imageView.setOnClickListener(new+View.OnClickListener()+{
++++++++@Override
++++++++public+void+onClick(View+v)+{
++++++++++++angle+=+angle+%2B+90;
++++++++++++imageView.setRotation(angle);
++++++++}
++++});|code-block|syntax|javascript|456315|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I think the best method :)

<pre><code>int angle = 0;
imageView.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 angle = angle + 90;
 imageView.setRotation(angle);
 }
 });
</code></pre>

blocks|key|456363|text|也可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456364|imageView.animate().rotation(180).start();|code-block|syntax|javascript|456365|got+from+here.|offset|length|456366|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/30209711/7168430^0|0|0|0|E|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Can also be done this way:-

<pre><code>imageView.animate().rotation(180).start();
</code></pre>

<a href="https://stackoverflow.com/a/30209711/7168430">got from here.</a>

blocks|key|456406|text|在android中延迟旋转图片：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456407|imgSplash.animate().rotationBy(360f).setDuration(3000).setInterpolator(new+LinearInterpolator()).start();|code-block|syntax|javascript|456408|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Rotate an image in android with delay:

<pre><code>imgSplash.animate().rotationBy(360f).setDuration(3000).setInterpolator(new LinearInterpolator()).start();
</code></pre>

blocks|key|456481|text|如果你想将一张图片旋转180度，那么在imageview标签中输入这两个值：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456482|android:scaleX="-1"
android:scaleY="-1"|code-block|syntax|javascript|456483|解释：-+scaleX+=1和scaleY+=1代表它的正常状态，但是如果我们把-1放在scaleX/scaleY属性上，那么它将被旋转180度|456484|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

if u want to rotate an image by 180 degrees then put these two value in imageview tag:-

<pre><code>android:scaleX="-1"
android:scaleY="-1"
</code></pre>

Explanation:- scaleX = 1 and scaleY = 1 repesent it's normal state but if we put -1 on scaleX/scaleY property then it will be rotated by 180 degrees

blocks|key|456498|text|Matrix+matrix+=+new+Matrix();
imageView.setScaleType(ImageView.ScaleType.MATRIX);+//required
matrix.postRotate((float)+20,+imageView.getDrawable().getBounds().width()/2,+imageView.getDrawable().getBounds().height()/2);
imageView.setImageMatrix(matrix);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|456499|如何使用？|unstyled|456500|public+class+MainActivity+extends+AppCompatActivity+{
+++int+view+=+R.layout.activity_main;
+++TextView+textChanger;
+++ImageView+imageView;
+++@RequiresApi(api+=+Build.VERSION_CODES.JELLY_BEAN)
+++@Override
+++protected+void+onCreate(Bundle+savedInstanceState)+{
++++++super.onCreate(savedInstanceState);
++++++setContentView(view);
++++++textChanger+=+findViewById(R.id.textChanger);
++++++imageView=findViewById(R.id.imageView);
++++++textChanger.setOnClickListener(new+View.OnClickListener()+{
+++++++++@Override
+++++++++public+void+onClick(View+v)+{
++++++++++++roateImage(imageView);
+++++++++}
++++++});
+++}
+++private+void+roateImage(ImageView+imageView)+{
++++++Matrix+matrix+=+new+Matrix();
++++++imageView.setScaleType(ImageView.ScaleType.MATRIX);+//required
++++++matrix.postRotate((float)+20,+imageView.getDrawable().getBounds().width()/2,++++imageView.getDrawable().getBounds().height()/2);
++++++imageView.setImageMatrix(matrix);
+++}
}|456501|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>Matrix matrix = new Matrix();
imageView.setScaleType(ImageView.ScaleType.MATRIX); //required
matrix.postRotate((float) 20, imageView.getDrawable().getBounds().width()/2, imageView.getDrawable().getBounds().height()/2);
imageView.setImageMatrix(matrix);
</code></pre>

how to use?

<pre><code>public class MainActivity extends AppCompatActivity {
 int view = R.layout.activity_main;
 TextView textChanger;
 ImageView imageView;
 @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(view);
 textChanger = findViewById(R.id.textChanger);
 imageView=findViewById(R.id.imageView);
 textChanger.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 roateImage(imageView);
 }
 });
 }
 private void roateImage(ImageView imageView) {
 Matrix matrix = new Matrix();
 imageView.setScaleType(ImageView.ScaleType.MATRIX); //required
 matrix.postRotate((float) 20, imageView.getDrawable().getBounds().width()/2, imageView.getDrawable().getBounds().height()/2);
 imageView.setImageMatrix(matrix);
 }
}
</code></pre>

blocks|key|670805|text|对于Kotlin来说|type|unstyled|depth|inlineStyleRanges|entityRanges|data|670806|mImageView.rotation+=+90f+//angle+in+float|code-block|syntax|javascript|670807|这将旋转imageView，而不是旋转图像|670808|另外，尽管它是View类中的一个方法。所以你几乎可以使用它来旋转任何视图。|offset|length|style|CODE|670809|entityMap^0|0|0|0|7|4|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

For Kotlin, 

<pre><code>mImageView.rotation = 90f //angle in float
</code></pre>

This will rotate the imageView rather than rotating the image

Also, though its a method in <code>View</code> class. So you can pretty much rotate any view using it.

I am using the following code to rotate a image in ImageView by an angle. Is there any simpler and less complex method available.

<pre><code>ImageView iv = (ImageView)findViewById(imageviewid);
TextView tv = (TextView)findViewById(txtViewsid);
Matrix mat = new Matrix();
Bitmap bMap = BitmapFactory.decodeResource(getResources(),imageid);
mat.postRotate(Integer.parseInt(degree));===&gt;angle to be rotated
Bitmap bMapRotate = Bitmap.createBitmap(bMap, 0, 0,bMap.getWidth(),bMap.getHeight(), mat, true);
iv.setImageBitmap(bMapRotate);
</code></pre>

Android: Rotate image in imageview by an angle

Android Studio

Android

Kotlin

我正在使用下面的代码在ImageView中旋转一个角度的图像。有没有更简单、更简单的方法。ImageView iv = (ImageView)findViewById(imageviewid);TextView tv = (TextView)findViewById(txtViewsid);Matrix mat = n...

问Android:按一定角度旋转imageview中的图片
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