一、引用列表--站在巨人的肩膀上

SimpleCropView https://github.com/IsseiAoki/SimpleCropView
android开发游记：自定义图片裁剪组件 http://blog.csdn.net/liaoinstan/article/details/48734283
AndroidStudio怎样导入library项目开源库http://jingyan.baidu.com/article/1974b2898917aff4b1f77415.html

二、导入库

下载项目SimpleCropView。
导入库。导入方法：AndroidStudio怎样导入library项目开源库
在SimpleCropView打开build.gradle，将

classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.6'classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

复制到你项目中的build.gradle，整个build.gradle应该像这样

// Top-level build file where you can add configuration options common to all sub-projects/modules.buildscript {    repositories {        jcenter()    }    dependencies {        classpath 'com.android.tools.build:gradle:2.3.3'        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.6'        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'        // NOTE: Do not place your application dependencies here; they belong        // in the individual module build.gradle files    }} allprojects {    repositories {        jcenter()    }} task clean(type: Delete) {    delete rootProject.buildDir}

三、在项目中引用组件

创建Activity。假设创建的Activity叫做CropActivity.class,布局文件叫做layout_crop.xml。
在layout_crop.xml中添加SimpleCropView组件

在CropActivity.class的OnCreate()添加如下代码，更多的其他选项请参考SimpleCropView。

mCropView = (CropImageView)findViewById(R.id.cropImageView);mCropView.setInitialFrameScale(0.8f);String srcPicPath = "图片路径";File file = new File(srcPicPath);BitmapFactory.Options option = new BitmapFactory.Options();if(file.length()>2*1024*1024){ //如果原图大于2M，压缩，避免程序崩溃    option.inSampleSize = (int)file.length()/(2*1024*1024);    Log.d(TAG, "initCropView: "+option.inSampleSize);}Bitmap bitmap = BitmapFactory.decodeFile(srcPicPath,option);mCropView.setImageBitmap(bitmap);if(bitmap.isRecycled()){    bitmap.recycle();}

保存裁剪后的图片

private void saveBitmapToPath(String path){ //path为图片存储路径    Bitmap bitmap = mCropView.getCroppedBitmap();    try {        File f = new File(path);        if (f.exists()) {            f.delete();        }        FileOutputStream out = new FileOutputStream(f);        bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);        out.flush();        out.close();    } catch (IOException e) {        Log.d(TAG, "saveBitmapToPath: "+e.toString());    }}

四、总结

1、SimpleCropView有很多有用的方法，怎么用要去看SimpleCropView。
2、需要文件的读写权限。
3、写好的一个模组，可以直接拿过去用 http://download.csdn.net/download/dumpdoctorwang/9955403。文件如下

layout_crop.xml

<?xml version="1.0" encoding="utf-8"?>

colors.xml

<?xml version="1.0" encoding="utf-8"?>    #3F51B5    #303F9F    #FF4081    #AA1C1C1C    #1C1C1C    #5DAC81    #4F916D    #5DAC81    #FFFFFB    #FFFFFB    #1C1C1C    #333333

CropActivity.class

package cn.edu.scu.creator.xxx;import android.content.Intent;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Build;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import android.widget.Button;import com.isseiaoki.simplecropview.CropImageView;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import static android.R.attr.button;import static android.R.attr.data;public class CropActivity extends AppCompatActivity {    private final static String TAG = MainActivity.TAG;    private CropImageView mCropView ;    private Button btOK;    private Button btCancel;    private Button btRotate;    private String srcPicPath;    private String dstPicPath;    /**     * 创建本Activity需要的Intent     * @param activity 调用本Activity的Activity     * @param srcPicPath 原图路径     * @param dstPicPath 保存路径     * @return     */    public static Intent createIntent(AppCompatActivity activity,String srcPicPath, String dstPicPath){        Intent intent = new Intent(activity,CropActivity.class);        intent.putExtra("srcPicPath", srcPicPath);        intent.putExtra("dstPicPath", dstPicPath);        return intent;    }    /**     * 初始按钮和mCropView组件     * @param savedInstanceState     */    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_crop);        mCropView = (CropImageView)findViewById(R.id.cropImageView);        mCropView.setInitialFrameScale(0.8f);                      //设置裁剪框大小        mCropView.setCropMode(CropImageView.CropMode.RATIO_9_16);  //设置裁剪框比例        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {      //设置裁剪框颜色            mCropView.setFrameColor(getResources().getColor(R.color.frame,this.getTheme()));            mCropView.setHandleColor(getResources().getColor(R.color.handle,this.getTheme()));            mCropView.setGuideColor(getResources().getColor(R.color.guide,this.getTheme()));        } else {            mCropView.setFrameColor(getResources().getColor(R.color.frame));            mCropView.setHandleColor(getResources().getColor(R.color.handle));            mCropView.setGuideColor(getResources().getColor(R.color.guide));        }        btOK = (Button)findViewById(R.id.btOK);        btOK.setOnClickListener(onClickListener);        btCancel = (Button)findViewById(R.id.btCancel);        btCancel.setOnClickListener(onClickListener);        btRotate = (Button)findViewById(R.id.btRotate);        btRotate.setOnClickListener(onClickListener);        initCropView();    }    /**     * 从Intent获取原图路径和保存图片路径，并载入到mCropView控件中     */    private void initCropView(){        try {            Intent intent = this.getIntent();            Bundle bundle = intent.getExtras();            if (bundle != null) {                srcPicPath = bundle.getString("srcPicPath"); // 原图路径                dstPicPath = bundle.getString("dstPicPath"); // 存储路径                BitmapFactory.Options option = new BitmapFactory.Options();                File file = new File(srcPicPath);                if(file.length()>2*1024*1024){ //如果原图大于2M，压缩，避免程序崩溃                    option.inSampleSize = (int)file.length()/(2*1024*1024);                    Log.d(TAG, "initCropView: "+option.inSampleSize);                }                Bitmap bitmap = BitmapFactory.decodeFile(srcPicPath,option);                mCropView.setImageBitmap(bitmap);                if(bitmap.isRecycled()){                    bitmap.recycle();                }            }        }catch (Exception e){            Log.d(TAG, "onCreate: "+e.toString());        }    }    /**     * 按钮监听器     */    private View.OnClickListener onClickListener = new View.OnClickListener() {        @Override        public void onClick(View v) {            switch (v.getId()){                case R.id.btOK:                    saveBitmapToPath(mCropView.getCroppedBitmap(),dstPicPath);                    break;                case R.id.btCancel:                    returnToMainActivity("",RESULT_CANCELED);                    break;                case R.id.btRotate:                    rotateImage();                    break;                default:                    break;            }        }    };    /**     * 保存图像     * @param bitmap 要保存的图像     * @param path 保存路径     */    private void saveBitmapToPath(Bitmap bitmap,String path){//        mCropView.setImageBitmap(bitmap);        try {            File f = new File(path);            if (f.exists()) {                f.delete();            }            FileOutputStream out = new FileOutputStream(f);            bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);            out.flush();            out.close();        } catch (IOException e) {            Log.d(TAG, "saveBitmapToPath: "+e.toString());        }        returnToMainActivity(path,RESULT_OK);    }    /**     * 返回上一个Activity，并将保存路径放在Intent中返回     * @param dstPath 保存路径     * @param result 结果     */    private void returnToMainActivity(String dstPath,int result){        Intent intent = new Intent();        intent.putExtra("dstPath", dstPath);        setResult(result, intent);        finish();    }    /**     * 旋转图片     */    private void rotateImage(){        mCropView.rotateImage(CropImageView.RotateDegrees.ROTATE_90D);    }}

MainActivity.class

public class MainActivity extends AppCompatActivity {    public final static String TAG = "TAG"; //调试用TAG    public final static int REQUEST_CROP = 2;    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);      if (requestCode == REQUEST_CROP && resultCode == RESULT_OK && data != null) {            //裁剪成功的操作        }    }   //裁剪图片，path为图片路径    private void cropPicture(String path){        try {            File srcPic = new File(path);            String toPath = Environment.getExternalStorageDirectory().getPath() + "/MyApp";            File destDir = new File(toPath);            if (!destDir.exists()) {                destDir.mkdirs();            }            String savePath = toPath+"/bg.jpeg"; //裁剪后的图片保存路径            startActivityForResult(CropActivity.createIntent(this,path,savePath), REQUEST_CROP);        }catch (Exception e){            Log.d(TAG, "cropPicture: "+e.toString());        }    }}

读我.txt

将activity_crop.xml、colors.xml、CropActivity.java放到该放的位置,使用方法在MainActivity.java中。

Android使用插件SimpleCropView

一、引用列表--站在巨人的肩膀上

android开发游记：自定义图片裁剪组件 http://blog.csdn.net/liaoinstan/article/details/48734283

AndroidStudio怎样导入library项目开源库http://jingyan.baidu.com/article/1974b2898917aff4b1f77415.html

二、导入库

三、在项目中引用组件

四、总结

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