需要在android应用程序中裁剪图像的示例吗

对不起，这不是技术问题

我正在研究如何在android应用程序中实现一个非常常见的功能，用户可以裁剪图像的一部分。这通常使用悬浮在阴影图像上方的方形窗口来执行。一个很好的例子是在linkedin应用程序中选择个人资料图像。 有没有人知道或有好的例子来说明如何做到这一点

提前感谢。

尝试此库：

对于正方形：

intent.putExtra(CropImage.ASPECT_X, 2);
intent.putExtra(CropImage.ASPECT_Y, 2);

对于矩形：

intent.putExtra(CropImage.ASPECT_X, 3);
intent.putExtra(CropImage.ASPECT_Y, 2);

试试这个：

1.清单XML 3。Main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/textViewAddCard"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Take Image"
android:textSize="16dp"
android:layout_gravity="center"
android:gravity="center"
android:typeface="sans"/>

<Button
android:id="@+id/btn_take_camera"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Take From Camera"
android:layout_marginTop="5dp"
android:layout_gravity="center"
android:typeface="sans"/>

<Button
android:id="@+id/btn_select_gallery"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Select from Gallery"
android:layout_marginTop="10dp"
android:layout_gravity="center"
android:typeface="sans" />
<ImageView
android:id="@+id/imageView1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>

---

尝试下面的示例方法。不仅可以剪切矩形，还可以从位图中的任何位置剪切任何形状

你也可以从位图的中心切一只米老鼠

下面的方法是剪切一个矩形位图，使其在位图的左侧有一个尖三角形。就像whatsapp为聊天室中共享的图像缩略图所做的一样

使用setXfermode（new PoterDuffXfermode（Mode.CLEAR））从绘制中绘制的任何内容都将清除位图中的像素

试试看。。希望这有帮助：）

---

关于这一点有很多问题和答案。希望这一条能有所帮助：referelink也可以referelink:Bundle extras=data.getExtras（）；。。。。。。。。？在选择个人资料图片时，如何在imageview上绘制可拖动的半透明圆圈，如whatsapp facebook和其他应用程序。那你的施舍方法对我有用，知道吗

package camera.test.demo;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class SimpleCameraGalleryDemo extends Activity {
private static final int PICK_FROM_CAMERA = 1;
private static final int PICK_FROM_GALLERY = 2;
ImageView imgview;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

imgview = (ImageView) findViewById(R.id.imageView1);
Button buttonCamera = (Button) findViewById(R.id.btn_take_camera);
Button buttonGallery = (Button) findViewById(R.id.btn_select_gallery);
buttonCamera.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// call android default camera
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

intent.putExtra(MediaStore.EXTRA_OUTPUT,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI.toString());
// ******** code for crop image
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 0);
intent.putExtra("aspectY", 0);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 150);

try {

intent.putExtra("return-data", true);
startActivityForResult(intent, PICK_FROM_CAMERA);

} catch (ActivityNotFoundException e) {
// Do nothing for now
}
}
});
buttonGallery.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
// call android default gallery
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
// ******** code for crop image
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 0);
intent.putExtra("aspectY", 0);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 150);

try {

intent.putExtra("return-data", true);
startActivityForResult(Intent.createChooser(intent,
"Complete action using"), PICK_FROM_GALLERY);

} catch (ActivityNotFoundException e) {
// Do nothing for now
}
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (requestCode == PICK_FROM_CAMERA) {
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
imgview.setImageBitmap(photo);

}
}

if (requestCode == PICK_FROM_GALLERY) {
Bundle extras2 = data.getExtras();
if (extras2 != null) {
Bitmap photo = extras2.getParcelable("data");
imgview.setImageBitmap(photo);

}
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/textViewAddCard"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Take Image"
android:textSize="16dp"
android:layout_gravity="center"
android:gravity="center"
android:typeface="sans"/>

<Button
android:id="@+id/btn_take_camera"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Take From Camera"
android:layout_marginTop="5dp"
android:layout_gravity="center"
android:typeface="sans"/>

<Button
android:id="@+id/btn_select_gallery"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Select from Gallery"
android:layout_marginTop="10dp"
android:layout_gravity="center"
android:typeface="sans" />
<ImageView
android:id="@+id/imageView1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>

private Bitmap cropAndGivePointedShape(Bitmap originalBitmap)
    {
        Bitmap bmOverlay = Bitmap.createBitmap(originalBitmap.getWidth(),
                                               originalBitmap.getHeight(),
                                               Bitmap.Config.ARGB_8888);

        Paint p = new Paint();
        p.setXfermode(new PorterDuffXfermode(Mode.CLEAR));              
        Canvas canvas = new Canvas(bmOverlay); 
        canvas.drawBitmap(originalBitmap, 0, 0, null); 
        canvas.drawRect(0, 0, 20, 20, p);

        Point a = new Point(0, 20);
        Point b = new Point(20, 20);
        Point c = new Point(0, 40);

        Path path = new Path();
        path.setFillType(FillType.EVEN_ODD);
        path.lineTo(b.x, b.y);
        path.lineTo(c.x, c.y);
        path.lineTo(a.x, a.y);
        path.close();

        canvas.drawPath(path, p);

        a = new Point(0, 40);
        b = new Point(0, 60);
        c = new Point(20, 60);

        path = new Path();
        path.setFillType(FillType.EVEN_ODD);
        path.lineTo(b.x, b.y);
        path.lineTo(c.x, c.y);
        path.lineTo(a.x, a.y);
        path.close();

        canvas.drawPath(path, p);

        canvas.drawRect(0, 60, 20, originalBitmap.getHeight(), p);

        return bmOverlay;
    }