基于ucrop实现图片裁剪需求

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效果图

重写ucrop布局，更改UCropActivity代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ucrop_photobox"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FF1A1A1A">

    <com.yalantis.ucrop.view.UCropView
        android:id="@+id/ucrop"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/tv_rotate_angel"
        android:layout_marginBottom="10dp" />

    <TextView
        android:id="@+id/tv_rotate_angel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/rotate_scroll_wheel"
        android:layout_centerHorizontal="true"
        android:text=""
        android:textColor="@android:color/white"
        android:textSize="14sp" />

    <com.yalantis.ucrop.view.widget.HorizontalProgressWheelView
        android:id="@+id/rotate_scroll_wheel"
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:layout_above="@+id/layout_aspect_ratio"
        android:layout_marginBottom="5dp" />

    <LinearLayout
        android:id="@+id/layout_aspect_ratio"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/ll_bottom"
        android:layout_marginBottom="20dp"
        android:gravity="center"
        android:orientation="horizontal" />

    <LinearLayout
        android:id="@+id/ll_bottom"
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:layout_alignParentBottom="true"
        android:background="@android:color/black"
        android:gravity="center_vertical"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/tv_cancel"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:layout_marginStart="15dp"
            android:layout_weight="1"
            android:text="取消"
            android:textColor="@android:color/white" />

        <ImageView
            android:id="@+id/iv_rotate"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:contentDescription="图片旋转90度"
            android:src="@drawable/icon_new_recycle" />

        <TextView
            android:id="@+id/tv_free"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="自由裁剪"
            android:textColor="@android:color/white" />

        <ImageView
            android:id="@+id/iv_rotate_reset"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:contentDescription="旋转重置"
            android:src="@drawable/icon_new_hy" />

        <TextView
            android:id="@+id/tv_ok"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="15dp"
            android:layout_marginRight="15dp"
            android:layout_weight="1"
            android:gravity="end"
            android:text="完成"
            android:textColor="@android:color/white" />
    </LinearLayout>
</RelativeLayout>

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == REQUEST_SELECT_PICTURE) {//图片选择结果
            final Uri selectedUri = data.getData();
            if (selectedUri != null) {
                startCropActivity(data.getData());
            } else {
                Toast.makeText(MainActivity.this, R.string.toast_cannot_retrieve_selected_image, Toast.LENGTH_SHORT).show();
            }
        } else if (requestCode == UCrop.REQUEST_CROP) {//图片裁剪结果
            handleCropResult(data);
        }
    }
    if (resultCode == UCrop.RESULT_ERROR) {
        handleCropError(data);
    }
}

private void handleCropResult(@NonNull Intent result) {
    final Uri resultUri = UCrop.getOutput(result);
    if (resultUri != null) {
        ResultActivity.startWithUri(MainActivity.this, resultUri);
        //可以在这里直接将裁剪后的图片进行保存
        //saveCroppedImage(resultUri);
    } else {
        Toast.makeText(MainActivity.this, R.string.toast_cannot_retrieve_cropped_image, Toast.LENGTH_SHORT).show();
    }
}

@SuppressWarnings("ThrowableResultOfMethodCallIgnored")
private void handleCropError(@NonNull Intent result) {
    final Throwable cropError = UCrop.getError(result);
    if (cropError != null) {
        Toast.makeText(MainActivity.this, cropError.getMessage(), Toast.LENGTH_LONG).show();
    } else {
        Toast.makeText(MainActivity.this, R.string.toast_unexpected_error, Toast.LENGTH_SHORT).show();
    }
}