open-android/uCrop

一款非常贴心、炫酷的图片裁剪库

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Step 1. Add the JitPack repository to your build file

Add it in your root settings.gradle at the end of repositories:

	dependencyResolutionManagement {
		repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
		repositories {
			mavenCentral()
			maven { url 'https://jitpack.io' }
		}
	}

Add it in your settings.gradle.kts at the end of repositories:

	dependencyResolutionManagement {
		repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
		repositories {
			mavenCentral()
			maven { url = uri("https://jitpack.io") }
		}
	}

Add to pom.xml

	<repositories>
		<repository>
		    <id>jitpack.io</id>
		    <url>https://jitpack.io</url>
		</repository>
	</repositories>

Add it in your build.sbt at the end of resolvers:

 
    resolvers += "jitpack" at "https://jitpack.io"

Add it in your project.clj at the end of repositories:

 
    :repositories [["jitpack" "https://jitpack.io"]]

Step 2. Add the dependency

	dependencies {
		implementation 'com.github.open-android:uCrop:v1.0.0'
	}

	dependencies {
		implementation("com.github.open-android:uCrop:v1.0.0")
	}

	<dependency>
	    <groupId>com.github.open-android</groupId>
	    <artifactId>uCrop</artifactId>
	    <version>v1.0.0</version>
	</dependency>


                            
    libraryDependencies += "com.github.open-android" % "uCrop" % "v1.0.0"


                            
    :dependencies [[com.github.open-android/uCrop "v1.0.0"]]

Readme

最火Android开源项目uCrop使用

开源地址：https://github.com/open-android/uCrop

PS：如果觉得文章太长，你也可观看该课程的视频，亲，里面还有高清，无码的福利喔

一款极具观赏性的图片裁剪库

运行效果

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使用步骤

1. 在project的build.gradle添加如下代码(如下图)

allprojects {
    repositories {
        ...
        maven { url "https://jitpack.io" }
    }
}

2. 在Module的build.gradle添加依赖

compile 'com.github.open-android:uCrop:v1.0.0'

3. 复制如下代码到xml

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

    <Button
        android:onClick="start"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开始裁剪图片"/>

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/iv"/>
</LinearLayout>

4. 复制如下代码到activity中 , 并且在onCreate方法查找ImageView

	private ImageView mIv;

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

        mIv = (ImageView) findViewById(R.id.iv);
    }

	public void start(View view){
        //需要裁剪的图片路径
        Uri sourceUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory() , "icon_18.jpg"));

        //裁剪完毕的图片存放路径
        Uri destinationUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory() , "icon_18_2.jpg"));

        UCrop.of(sourceUri, destinationUri) //定义路径
                .withAspectRatio(4, 3) //定义裁剪比例 4:3 ， 16:9
                .withMaxResultSize(100, 100) //定义裁剪图片宽高最大值
                .start(this);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        //裁剪成功后调用
        if (resultCode == RESULT_OK && requestCode == UCrop.REQUEST_CROP) {
            final Uri resultUri = UCrop.getOutput(data);
            //设置裁剪完成后的图片显示
            mIv.setImageURI(resultUri);

            //出错时进入该分支
        } else if (resultCode == UCrop.RESULT_ERROR) {
            final Throwable cropError = UCrop.getError(data);
        }
    }

5. 在清单文件注册以下activity ，该activity是裁剪界面

	<activity
        android:name="com.yalantis.ucrop.UCropActivity"
        android:screenOrientation="portrait"
        android:theme="@style/Theme.AppCompat.Light.NoActionBar"/>

6. 并且添加对SD卡的读写权限。

	 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>

详细的使用方法在DEMO里面都演示啦,如果你觉得这个库还不错,请赏我一颗star吧~~~
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