Android 调用系统剪裁工具剪裁用户头像 Android基础

在Activity中加入以下代码段：

private final int CODE_CROP = 0x131; //用于请求系统剪裁的请求码private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what){ case ImageCropUtil.Hand_Compress_Ok://图片压缩完成 modify_type = MODIFY_USER_HEAD_IMAGE; File file = new File(ImageCropUtil.getHeadCompressPath()); //图片地址在ImageCropUtil中定义好的固定值 mFiles.put(file.getName(), file); presenter.modifyUserHeadImage(mFiles); break; case ImageCropUtil.Hand_Compress_Failure://图片压缩失败 File file1 = new File(ImageCropUtil.ouputFilePath); //用压缩之前的图片 mFiles.put(file1.getName(), file1); presenter.modifyUserHeadImage(mFiles); break; }} };

【Android 调用系统剪裁工具剪裁用户头像】

一、在用户选择好图片后掉用方法如下：（Activity中调用）

//跳转裁剪图片 ImageCropUtil.cropPhoto(this, headPath, CODE_CROP);

二、剪裁完成后调用压缩图片方法：【activity中的onActivityResult方法中调用】（可以不调用，如果不调用你就发送到服务端很可能报错：accep 427 byte but received 8192）

if (requestCode == CODE_CROP && resultCode == RESULT_OK) { ImageCropUtil.compress15k(this, ImageCropUtil.ouputFilePath, handler); }

三、剪裁完成后会返回到handler中
四、以下是ImageCropUtil类：

import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Matrix; import android.media.ExifInterface; import android.net.Uri; import android.os.Environment; import android.os.Handler; import android.provider.MediaStore; import android.util.DisplayMetrics; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; /** * CreateTime 2017/9/18 16:10 * Author LiuShiHua * Description： */public class ImageCropUtil {public static final int Hand_Compress_Ok = 0x66; //图片压缩成功 public static final int Hand_Compress_Failure = 0x44; //图片压缩失败//压缩后的图片文件地址 public static String getHeadCompressPath() { return Environment.getExternalStorageDirectory() + "/ettda/temp/head_compress_output.jpg"; }//剪裁后的文件地址 public static final String ouputFilePath = Environment.getExternalStorageDirectory() + "/ettda/temp/head_output.jpg"; /** * 裁剪原始的图片(系统自带的剪裁工具) * * @param activity 上下文 * @param filePath 图片源路径 * @param CODE_REQUEST_CROP 请求剪裁的请求码 */ public static void cropPhoto(Activity activity, String filePath, int CODE_REQUEST_CROP) { File file = new File(filePath); if (!file.exists()) return; File tempFile = new File(ouputFilePath); if (!tempFile.exists()) { File parent = tempFile.getParentFile(); parent.mkdirs(); try { tempFile.createNewFile(); } catch (IOException e) { e.printStackTrace(); } }Uri uri = Uri.fromFile(tempFile); Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); intent.putExtra("crop", "true"); // 设置裁剪 intent.putExtra("aspectX", 1); // aspectX , aspectY :宽高的比例 intent.putExtra("aspectY", 1); intent.putExtra("outputX", 650); // outputX , outputY : 裁剪图片宽高 intent.putExtra("outputY", 650); //剪裁后过小时，拉伸 intent.putExtra("scale", true); intent.putExtra("scaleUpIfNeeded", true); /** * 此方法返回的图片只能是小图片（sumsang测试为高宽160px的图片） * 故将图片保存在Uri中，调用时将Uri转换为Bitmap，此方法还可解决miui系统不能return data的问题 */ Uri uritempFile = Uri.parse("file://" + "/" + ouputFilePath); //格式别搞错了 intent.putExtra(MediaStore.EXTRA_OUTPUT, uritempFile); //输出图片文件 //是否返回bitmap对象 intent.putExtra("return-data", false); intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); activity.startActivityForResult(intent, CODE_REQUEST_CROP); }/** * 压缩图片文件（1.5M以下） * * @param context * @param srcPath * @return */ public static void compress15k(final Activity context, final String srcPath, final Handler handler) { if (srcPath == null) { handler.sendEmptyMessage(Hand_Compress_Failure); return; } File file = new File(srcPath); if (!file.exists()){ handler.sendEmptyMessage(Hand_Compress_Failure); return; }new Thread() { @Override public void run() { super.run(); String pathNew = getHeadCompressPath(); File tempFile = new File(pathNew); if (!tempFile.exists()) { File parent = tempFile.getParentFile(); parent.mkdirs(); try { tempFile.createNewFile(); } catch (IOException e) { e.printStackTrace(); handler.sendEmptyMessage(Hand_Compress_Failure); return; } } String fileName = tempFile.getAbsolutePath(); DisplayMetrics dm = new DisplayMetrics(); context.getWindowManager().getDefaultDisplay().getMetrics(dm); float hh = dm.heightPixels; float ww = dm.widthPixels; BitmapFactory.Options opts = new BitmapFactory.Options(); opts.inJustDecodeBounds = false; int w = opts.outWidth; int h = opts.outHeight; int size = 0; if (w <= ww && h <= hh) { size = 1; } else { double scale = w >= h ? w / ww : h / hh; double log = Math.log(scale) / Math.log(2); double logCeil = Math.ceil(log); size = (int) Math.pow(2, logCeil); } opts.inSampleSize = size; Bitmap bitmap = BitmapFactory.decodeFile(srcPath, opts); Matrix m = new Matrix(); m.postRotate(digreeBitmap(srcPath)); bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), m, true); ByteArrayOutputStream baos = new ByteArrayOutputStream(); int quality = 100; bitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos); while (baos.toByteArray().length > 1536 * 1024) {//1.5M以下 baos.reset(); bitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos); quality -= 5; } try { baos.writeTo(new FileOutputStream(fileName)); } catch (Exception e) { e.printStackTrace(); handler.sendEmptyMessage(Hand_Compress_Failure); return; } finally { try { baos.flush(); baos.close(); } catch (IOException e) { e.printStackTrace(); } } handler.sendEmptyMessage(Hand_Compress_Ok); } }.start(); }private static int digreeBitmap(String imgpath) { int digree = 0; ExifInterface exif = null; try { exif = new ExifInterface(imgpath); } catch (IOException e) { e.printStackTrace(); exif = null; } if (exif != null) { // 读取图片中相机方向信息 int ori = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED); // 计算旋转角度 switch (ori) { case ExifInterface.ORIENTATION_ROTATE_90: digree = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: digree = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: digree = 270; break; default: digree = 0; break; } } return digree; } }