Android中使用OKHttp上传图片，从相机和相册中获取图片并剪切

效果：



注意：
1：网络权限
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
2：我封装了一个OKHttp，需要在build.gradle 中加入
compile 'com.squareup.okhttp3:logging-interceptor:3.4.2'  在同步一在
3：用SharedPreferences 保存和获取图片了，将图片和字符串进行了转换
4: 可以调用相机和相册获取图片，并进行剪切

//-----------------我的布局文件-----------------------------

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context="tckpicture.bwie.com.tackpicture2.MainActivity">

    <ImageView
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:scaleType="fitXY"
    android:src="@mipmap/ic_launcher"
    android:id="@+id/iv_img"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="相机"
        android:id="@+id/bt_camera"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="相册"
        android:id="@+id/bt_xiangce"/>
</LinearLayout>

//-------------我的MainActivity -------------------------

package tckpicture.bwie.com.tackpicture2;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import okhttp3.Request;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private ImageView iv_img;
    private Button bt_camera;
    private Button bt_xiangce;
    private static final int PHOTO_REQUEST_CAREMA = 1;// 拍照
private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择
private static final int PHOTO_REQUEST_CUT = 3;// 结果
    /* 头像名称 */
private static final String PHOTO_FILE_NAME = "temp_photo.jpg";
    private File tempFile;

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

    private void initView() {
        iv_img = (ImageView) findViewById(R.id.iv_img);
        bt_camera = (Button) findViewById(R.id.bt_camera);
        bt_xiangce = (Button) findViewById(R.id.bt_xiangce);
//从SharedPreferences获取图片
getBitmapFromSharedPreferences();

        bt_camera.setOnClickListener(this);
        bt_xiangce.setOnClickListener(this);
    }

    @Override
public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bt_camera:
                // 激活相机
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                // 判断存储卡是否可以用，可用进行存储
if (hasSdcard()) {
                    tempFile = new File(Environment.getExternalStorageDirectory(), PHOTO_FILE_NAME);
                    // 从文件中创建uri
Uri uri = Uri.fromFile(tempFile);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
                }
                // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CAREMA
startActivityForResult(intent, PHOTO_REQUEST_CAREMA);
                break;
            case R.id.bt_xiangce:
                // 激活系统图库，选择一张图片
Intent intent1 = new Intent(Intent.ACTION_PICK);
                intent1.setType("image/*");
                // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_GALLERY
startActivityForResult(intent1, PHOTO_REQUEST_GALLERY);
                break;
        }
    }


    /*
* 判断sdcard是否被挂载
*/
private boolean hasSdcard() {
        //判断ＳＤ卡手否是安装好的　　　media_mounted
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            return true;
        } else {
            return false;
        }
    }

    /*
     * 剪切图片
     */
private void crop(Uri uri) {
        // 裁剪图片意图
Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        intent.putExtra("crop", "true");
        // 裁剪框的比例，1：1
intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        // 裁剪后输出图片的尺寸大小
intent.putExtra("outputX", 250);
        intent.putExtra("outputY", 250);

        intent.putExtra("outputFormat", "JPEG");// 图片格式
intent.putExtra("noFaceDetection", true);// 取消人脸识别
intent.putExtra("return-data", true);
        // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CUT
startActivityForResult(intent, PHOTO_REQUEST_CUT);
    }

    /**
     *
     * @param requestCode
* @param resultCode
* @param data
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == PHOTO_REQUEST_GALLERY) {
            // 从相册返回的数据
if (data != null) {
                // 得到图片的全路径
Uri uri = data.getData();
                crop(uri);
            }
        } else if (requestCode == PHOTO_REQUEST_CAREMA) {
            // 从相机返回的数据
if (hasSdcard()) {
                crop(Uri.fromFile(tempFile));
            } else {
                Toast.makeText(MainActivity.this, "未找到存储卡，无法存储照片！", Toast.LENGTH_SHORT).show();
            }
        } else if (requestCode == PHOTO_REQUEST_CUT) {
            // 从剪切图片返回的数据
if (data != null) {
                Bitmap bitmap = data.getParcelableExtra("data");
                /**
                 * 获得图片
                 */
iv_img.setImageBitmap(bitmap);
                //保存到SharedPreferences
saveBitmapToSharedPreferences(bitmap);
            }
            try {
                // 将临时文件删除
tempFile.delete();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    //保存图片到SharedPreferences
private void saveBitmapToSharedPreferences(Bitmap bitmap) {
        // Bitmap bitmap=BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
        //第一步:将Bitmap压缩至字节数组输出流ByteArrayOutputStream
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 80, byteArrayOutputStream);
        //第二步:利用Base64将字节数组输出流中的数据转换成字符串String
byte[] byteArray = byteArrayOutputStream.toByteArray();
        String imageString = new String(Base64.encodeToString(byteArray, Base64.DEFAULT));
        //第三步:将String保持至SharedPreferences
SharedPreferences sharedPreferences = getSharedPreferences("testSP", Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putString("image", imageString);
        editor.commit();

        //上传头像
setImgByStr(imageString,"");
    }


    /**
     * 上传头像       此处使用用的OKHttp post请求上传的图片
     * @param imgStr                 
* @param imgName
*/
public  void setImgByStr(String imgStr, String imgName) {
        String url = "http://appserver。。。。。。。";
        Map<String, String> params = new HashMap<String, String>();
        params.put("id", "参数值");// 
params.put("data", imgStr);
        OkHttp.postAsync(url, params, new OkHttp.DataCallBack() {
            @Override
public void requestFailure(Request request, IOException e) {
                Log.i("上传失败", "失败" + request.toString() + e.toString());
            }
            @Override
public void requestSuccess(String result) throws Exception {
                Log.i("上传成功", result);
            }
        });
    }

    //从SharedPreferences获取图片
private void getBitmapFromSharedPreferences(){
        SharedPreferences sharedPreferences=getSharedPreferences("testSP", Context.MODE_PRIVATE);
        //第一步:取出字符串形式的Bitmap
String imageString=sharedPreferences.getString("image", "");
        //第二步:利用Base64将字符串转换为ByteArrayInputStream
byte[] byteArray=Base64.decode(imageString, Base64.DEFAULT);
        if(byteArray.length==0){
            iv_img.setImageResource(R.mipmap.ic_launcher);
        }else{
            ByteArrayInputStream byteArrayInputStream=new ByteArrayInputStream(byteArray);

            //第三步:利用ByteArrayInputStream生成Bitmap
Bitmap bitmap= BitmapFactory.decodeStream(byteArrayInputStream);
            iv_img.setImageBitmap(bitmap);
        }

    }

}



//下面是我封装的一个 OKHttp
注意：需要在build.gradle 中添加下面这句，然后在同步一下
compile 'com.squareup.okhttp3:logging-interceptor:3.4.2'


//----------下面是封装的OKHttp类------------------

package tckpicture.bwie.com.tackpicture2;

import android.os.Handler;
import android.os.Looper;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;


/**
 * Created by fan on 2016/11/9.
 */

public class OkHttp {

    /**
     * 静态实例
     */
private static OkHttp sOkHttpManager;

    /**
     * okhttpclient实例
     */
private OkHttpClient mClient;

    /**
     * 因为我们请求数据一般都是子线程中请求，在这里我们使用了handler
     */
private Handler mHandler;

    /**
     * 构造方法
     */
private OkHttp() {
//        // 可以通过实现 Logger 接口更改日志保存位置
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
        loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

//        mClient = new OkHttpClient.Builder().addInterceptor(loggingInterceptor).build();
mClient = new OkHttpClient();
        /**
         * 在这里直接设置连接超时.读取超时，写入超时
         */

OkHttpClient.Builder builder = mClient.newBuilder();
        builder.connectTimeout(10, TimeUnit.SECONDS);
        builder.readTimeout(10, TimeUnit.SECONDS);
        builder.writeTimeout(10, TimeUnit.SECONDS);
        builder.addInterceptor(loggingInterceptor);
        mClient = builder.build();

        /**
         * 如果是用的3.0之前的版本  使用以下直接设置连接超时.读取超时，写入超时
         */

        //client.setConnectTimeout(10, TimeUnit.SECONDS);
        //client.setWriteTimeout(10, TimeUnit.SECONDS);
        //client.setReadTimeout(30, TimeUnit.SECONDS);


        /**
         * 初始化handler
         */
mHandler = new Handler(Looper.getMainLooper());
    }



    /**
     * 单例模式  获取OkHttp实例
     *
     * @return
*/
public static OkHttp getInstance() {

        if (sOkHttpManager == null) {
            sOkHttpManager = new OkHttp();
        }
        return sOkHttpManager;
    }

    //-------------------------同步的方式请求数据--------------------------

    /**
     * 对外提供的get方法,同步的方式
     *
     * @param url 传入的地址
     * @return
*/
public static Response getSync(String url) {

        //通过获取到的实例来调用内部方法
return sOkHttpManager.inner_getSync(url);
    }

    /**
     * GET方式请求的内部逻辑处理方式，同步的方式
     *
     * @param url
* @return
*/
private Response inner_getSync(String url) {
        Request request = new Request.Builder().url(url).build();
        Response response = null;
        try {
            //同步请求返回的是response对象
response = mClient.newCall(request).execute();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return response;
    }

    /**
     * 对外提供的同步获取String的方法
     *
     * @param url
* @return
*/
public static String getSyncString(String url) {
        return sOkHttpManager.inner_getSyncString(url);
    }


    /**
     * 同步方法
     */
private String inner_getSyncString(String url) {
        String result = null;
        try {
            /**
             * 把取得到的结果转为字符串，这里最好用string()
             */
result = inner_getSync(url).body().string();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    //-------------------------异步的方式请求数据--------------------------
public static void getAsync(String url, DataCallBack callBack) {
        getInstance().inner_getAsync(url, callBack);
    }

    /**
     * 内部逻辑请求的方法
     *
     * @param url
* @param callBack
* @return
*/
private void inner_getAsync(String url, final DataCallBack callBack) {
        final Request request = new Request.Builder().url(url).build();

        mClient.newCall(request).enqueue(new Callback() {
            @Override
public void onFailure(Call call, IOException e) {
                deliverDataFailure(request, e, callBack);
            }

            @Override
public void onResponse(Call call, Response response) throws IOException {
                String result = null;
                try {
                    result = response.body().string();
                } catch (IOException e) {
                    deliverDataFailure(request, e, callBack);
                }
                deliverDataSuccess(result, callBack);
            }
        });
    }


    /**
     * 分发失败的时候调用
     *
     * @param request
* @param e
* @param callBack
*/
private void deliverDataFailure(final Request request, final IOException e, final DataCallBack callBack) {
        /**
         * 在这里使用异步处理
         */
mHandler.post(new Runnable() {
            @Override
public void run() {
                if (callBack != null) {
                    callBack.requestFailure(request, e);
                }
            }
        });
    }

    /**
     * 分发成功的时候调用
     *
     * @param result
* @param callBack
*/
private void deliverDataSuccess(final String result, final DataCallBack callBack) {
        /**
         * 在这里使用异步线程处理
         */
mHandler.post(new Runnable() {
            @Override
public void run() {
                if (callBack != null) {
                    try {
                        callBack.requestSuccess(result);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        });
    }

    /**
     * 数据回调接口
     */
public interface DataCallBack {
        void requestFailure(Request request, IOException e);

        void requestSuccess(String result) throws Exception;
    }

    //-------------------------提交表单--------------------------

public static void postAsync(String url, Map<String, String> params, DataCallBack callBack) {
        getInstance().inner_postAsync(url, params, callBack);
    }

    private void inner_postAsync(String url, Map<String, String> params, final DataCallBack callBack) {

        RequestBody requestBody = null;
        if (params == null) {
            params = new HashMap<>();
        }

        /**
         * 如果是3.0之前版本的，构建表单数据是下面的一句
         */
        //FormEncodingBuilder builder = new FormEncodingBuilder();

        /**
         * 3.0之后版本
         */
FormBody.Builder builder = new FormBody.Builder();

        /**
         * 在这对添加的参数进行遍历，map遍历有四种方式，如果想要了解的可以网上查找
         */
for (Map.Entry<String, String> map : params.entrySet()) {
            String key = map.getKey().toString();
            String value = null;
            /**
             * 判断值是否是空的
             */
if (map.getValue() == null) {
                value = "";
            } else {
                value = map.getValue();
            }
            /**
             * 把key和value添加到formbody中
             */
builder.add(key, value);
        }
        requestBody = builder.build();
        //结果返回
        // 请求对象
final Request request = new Request.Builder().url(url).post(requestBody).build();
        mClient.newCall(request).enqueue(new Callback() {
            @Override
public void onFailure(Call call, IOException e) {
                deliverDataFailure(request, e, callBack);
            }

            @Override
public void onResponse(Call call, Response response) throws IOException {
                String result = response.body().string();
                deliverDataSuccess(result, callBack);
            }


        });
    }


    //-------------------------文件下载--------------------------
public static void downloadAsync(String url, String desDir, DataCallBack callBack) {
        getInstance().inner_downloadAsync(url, desDir, callBack);
    }

    /**
     * 下载文件的内部逻辑处理类
     *
     * @param url      下载地址
     * @param desDir   目标地址
     * @param callBack
*/
private void inner_downloadAsync(final String url, final String desDir, final DataCallBack callBack) {
        final Request request = new Request.Builder().url(url).build();
        mClient.newCall(request).enqueue(new Callback() {
            @Override
public void onFailure(Call call, IOException e) {
                deliverDataFailure(request, e, callBack);
            }

            @Override
public void onResponse(Call call, Response response) throws IOException {

                /**
                 * 在这里进行文件的下载处理
                 */
InputStream inputStream = null;
                FileOutputStream fileOutputStream = null;
                try {
                    //文件名和目标地址
File file = new File(desDir, getFileName(url));
                    //把请求回来的response对象装换为字节流
inputStream = response.body().byteStream();
                    fileOutputStream = new FileOutputStream(file);
                    int len = 0;
                    byte[] bytes = new byte[2048];
                    //循环读取数据
while ((len = inputStream.read(bytes)) != -1) {
                        fileOutputStream.write(bytes, 0, len);
                    }
                    //关闭文件输出流
fileOutputStream.flush();
                    //调用分发数据成功的方法
deliverDataSuccess(file.getAbsolutePath(), callBack);
                } catch (IOException e) {
                    //如果失败，调用此方法
deliverDataFailure(request, e, callBack);
                    e.printStackTrace();
                } finally {
                    if (inputStream != null) {
                        inputStream.close();
                    }
                    if (fileOutputStream != null) {
                        fileOutputStream.close();
                    }

                }
            }

        });
    }

    /**
     * 根据文件url获取文件的路径名字
     *
     * @param url
* @return
*/
private String getFileName(String url) {
        int separatorIndex = url.lastIndexOf("/");
        String path = (separatorIndex < 0) ? url : url.substring(separatorIndex + 1, url.length());
        return path;
    }



}


//---------------完了-----------------

package tckpicture.bwie.com.tackpicture2;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import okhttp3.Request;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private ImageView iv_img;
    private Button bt_camera;
    private Button bt_xiangce;
    private static final int PHOTO_REQUEST_CAREMA = 1;// 拍照
private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择
private static final int PHOTO_REQUEST_CUT = 3;// 结果
    /* 头像名称 */
private static final String PHOTO_FILE_NAME = "temp_photo.jpg";
    private File tempFile;

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

    private void initView() {
        iv_img = (ImageView) findViewById(R.id.iv_img);
        bt_camera = (Button) findViewById(R.id.bt_camera);
        bt_xiangce = (Button) findViewById(R.id.bt_xiangce);
//从SharedPreferences获取图片
getBitmapFromSharedPreferences();

        bt_camera.setOnClickListener(this);
        bt_xiangce.setOnClickListener(this);
    }

    @Override
public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bt_camera:
                // 激活相机
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                // 判断存储卡是否可以用，可用进行存储
if (hasSdcard()) {
                    tempFile = new File(Environment.getExternalStorageDirectory(), PHOTO_FILE_NAME);
                    // 从文件中创建uri
Uri uri = Uri.fromFile(tempFile);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
                }
                // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CAREMA
startActivityForResult(intent, PHOTO_REQUEST_CAREMA);
                break;
            case R.id.bt_xiangce:
                // 激活系统图库，选择一张图片
Intent intent1 = new Intent(Intent.ACTION_PICK);
                intent1.setType("image/*");
                // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_GALLERY
startActivityForResult(intent1, PHOTO_REQUEST_GALLERY);
                break;
        }
    }


    /*
* 判断sdcard是否被挂载
*/
private boolean hasSdcard() {
        //判断ＳＤ卡手否是安装好的　　　media_mounted
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            return true;
        } else {
            return false;
        }
    }

    /*
     * 剪切图片
     */
private void crop(Uri uri) {
        // 裁剪图片意图
Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        intent.putExtra("crop", "true");
        // 裁剪框的比例，1：1
intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        // 裁剪后输出图片的尺寸大小
intent.putExtra("outputX", 250);
        intent.putExtra("outputY", 250);

        intent.putExtra("outputFormat", "JPEG");// 图片格式
intent.putExtra("noFaceDetection", true);// 取消人脸识别
intent.putExtra("return-data", true);
        // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CUT
startActivityForResult(intent, PHOTO_REQUEST_CUT);
    }

    /**
     *
     * @param requestCode
* @param resultCode
* @param data
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == PHOTO_REQUEST_GALLERY) {
            // 从相册返回的数据
if (data != null) {
                // 得到图片的全路径
Uri uri = data.getData();
                crop(uri);
            }
        } else if (requestCode == PHOTO_REQUEST_CAREMA) {
            // 从相机返回的数据
if (hasSdcard()) {
                crop(Uri.fromFile(tempFile));
            } else {
                Toast.makeText(MainActivity.this, "未找到存储卡，无法存储照片！", Toast.LENGTH_SHORT).show();
            }
        } else if (requestCode == PHOTO_REQUEST_CUT) {
            // 从剪切图片返回的数据
if (data != null) {
                Bitmap bitmap = data.getParcelableExtra("data");
                /**
                 * 获得图片
                 */
iv_img.setImageBitmap(bitmap);
                //保存到SharedPreferences
saveBitmapToSharedPreferences(bitmap);
            }
            try {
                // 将临时文件删除
tempFile.delete();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    //保存图片到SharedPreferences
private void saveBitmapToSharedPreferences(Bitmap bitmap) {
        // Bitmap bitmap=BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
        //第一步:将Bitmap压缩至字节数组输出流ByteArrayOutputStream
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 80, byteArrayOutputStream);
        //第二步:利用Base64将字节数组输出流中的数据转换成字符串String
byte[] byteArray = byteArrayOutputStream.toByteArray();
        String imageString = new String(Base64.encodeToString(byteArray, Base64.DEFAULT));
        //第三步:将String保持至SharedPreferences
SharedPreferences sharedPreferences = getSharedPreferences("testSP", Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putString("image", imageString);
        editor.commit();

        //上传头像
setImgByStr(imageString,"");
    }


    /**
     * 上传头像
     * @param imgStr
* @param imgName
     */
public  void setImgByStr(String imgStr, String imgName) {
        String url = "http://appserver.1035.mobi/MobiSoft/User_upLogo";
        Map<String, String> params = new HashMap<String, String>();
        params.put("id", "11460047");// 11459832
params.put("data", imgStr);
        OkHttp.postAsync(url, params, new OkHttp.DataCallBack() {
            @Override
public void requestFailure(Request request, IOException e) {
                Log.i("上传失败", "失败" + request.toString() + e.toString());
            }
            @Override
public void requestSuccess(String result) throws Exception {
                Log.i("上传成功", result);
            }
        });
    }

    //从SharedPreferences获取图片
private void getBitmapFromSharedPreferences(){
        SharedPreferences sharedPreferences=getSharedPreferences("testSP", Context.MODE_PRIVATE);
        //第一步:取出字符串形式的Bitmap
String imageString=sharedPreferences.getString("image", "");
        //第二步:利用Base64将字符串转换为ByteArrayInputStream
byte[] byteArray=Base64.decode(imageString, Base64.DEFAULT);
        if(byteArray.length==0){
            iv_img.setImageResource(R.mipmap.ic_launcher);
        }else{
            ByteArrayInputStream byteArrayInputStream=new ByteArrayInputStream(byteArray);

            //第三步:利用ByteArrayInputStream生成Bitmap
Bitmap bitmap= BitmapFactory.decodeStream(byteArrayInputStream);
            iv_img.setImageBitmap(bitmap);
        }

    }

}