Java 如何从相机和多媒体资料中拾取图像，裁剪图像并设置为“图像视图”

请帮助我，到目前为止，我已经编写了一个代码，可以从相机和多媒体资料中选择图像并显示出来，但我发现很难裁剪它。我正在尝试使用第三方android库，名为android image cropper，但发现很难实现。我对代码进行了研究，但没有发现任何有用的东西。换言之，我正试图在whasap中实现可获得的效果，在whasap中，您单击一个按钮上载配置文件图片，它将其设置为裁剪，然后显示图像的圆形视图。这里是到android库的链接。任何帮助都将不胜感激，谢谢大家

这是我的java代码

public class MainActivity extends Activity {

    private int REQUEST_CAMERA = 0, SELECT_FILE = 1;
    private Button btnSelect;
    private ImageView ivImage;
    private String userChoosenTask;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnSelect = (Button) findViewById(R.id.btnSelectPhoto);
        btnSelect.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                selectImage();
            }
        });
        ivImage = (ImageView) findViewById(R.id.ivImage);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case Utility.MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    if(userChoosenTask.equals("Take Photo"))
                        cameraIntent();
                    else if(userChoosenTask.equals("Choose from Library"))
                        galleryIntent();
                } else {
                    //code for deny
                }
                break;
        }
    }

    private void selectImage() {
        final CharSequence[] items = { "Take Photo", "Choose from Library",
                "Cancel" };

        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("Add Photo!");
        builder.setItems(items, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int item) {
                boolean result=Utility.checkPermission(MainActivity.this);

                if (items[item].equals("Take Photo")) {
                    userChoosenTask ="Take Photo";
                    if(result)
                        cameraIntent();

                } else if (items[item].equals("Choose from Library")) {
                    userChoosenTask ="Choose from Library";
                    if(result)
                        galleryIntent();

                } else if (items[item].equals("Cancel")) {
                    dialog.dismiss();
                }
            }
        });
        builder.show();
    }

    // Ezphoto picker  in action

    private void galleryIntent()
    {
        EZPhotoPickConfig config = new EZPhotoPickConfig();
        config.photoSource = PhotoSource.GALERY;
        config.needToExportThumbnail = true;
        config.exportingThumbSize = 200;
        config.exportingSize = 1000;
        EZPhotoPick.startPhotoPickActivity(MainActivity.this, config);
    }

    private void cameraIntent()
    {
        EZPhotoPickConfig config = new EZPhotoPickConfig();
        config.photoSource = PhotoSource.CAMERA;
        config.exportingSize = 1000;
        EZPhotoPick.startPhotoPickActivity(MainActivity.this, config);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode != RESULT_OK){
            return;
        }

        if(requestCode == EZPhotoPick.PHOTO_PICK_REQUEST_CODE){
            try {
                Bitmap pickedPhoto = new EZPhotoPickStorage(this).loadLatestStoredPhotoBitmapThumbnail();
                ivImage.setImageBitmap(pickedPhoto);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
}

这是我的xml代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="5dp" >

        <Button
            android:id="@+id/btnSelectPhoto"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Select Photo" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical"
        android:padding="10dp" >

        <ImageView
            android:id="@+id/ivImage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher" />
    </LinearLayout>

</LinearLayout>

来源：

这是密码

private void performCrop(Uri picUri) {
    try {
        Intent cropIntent = new Intent("com.android.camera.action.CROP");
        // indicate image type and Uri
        cropIntent.setDataAndType(picUri, "image/*");
        // set crop properties here
        cropIntent.putExtra("crop", true);
        // indicate aspect of desired crop
        cropIntent.putExtra("aspectX", 1);
        cropIntent.putExtra("aspectY", 1);
        // indicate output X and Y
        cropIntent.putExtra("outputX", 128);
        cropIntent.putExtra("outputY", 128);
        // retrieve data on return
        cropIntent.putExtra("return-data", true);
        // start the activity - we handle returning in onActivityResult
        startActivityForResult(cropIntent, PIC_CROP);
    }
    // respond to users whose devices do not support the crop action
    catch (ActivityNotFoundException anfe) {
        // display an error message
        String errorMessage = "Whoops - your device doesn't support the crop action!";
        Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
        toast.show();
    }
}

宣布：

final int PIC_CROP = 1;

在顶端

在onActivity结果方法中，编写以下代码：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == PIC_CROP) {
        if (data != null) {
            // get the returned data
            Bundle extras = data.getExtras();
            // get the cropped bitmap
            Bitmap selectedBitmap = extras.getParcelable("data");

            imgView.setImageBitmap(selectedBitmap);
        }
    }
}

资料来源：

其他有用的链接：

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希望有帮助！祝你好运

您可以尝试使用此库来裁剪图像

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如果你喜欢我的建议，请投赞成票。

@S Kharbanda请再说一句，我在哪里声明最终int PIC_CROP=1；声明

int PIC\u CROP=1

在声明

private int REQUEST\u CAMERA=0的顶部，选择\u FILE=1。就像那样，但这只是1个变量，而不是2个。没问题，如果你能投票接受我的答案，我会非常感激。谢谢