Android 7.0 图片剪切问题，选择头像上传

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一、 7.0文件地址传输的问题

异常信息：FileUriExposedException：

<!-- android 7.0以上 --><provider    android:name="android.support.v4.content.FileProvider"    android:authorities="应用报名.fileProvider"    android:exported="false"    android:grantUriPermissions="true">    <meta-data        android:name="android.support.FILE_PROVIDER_PATHS"        android:resource="@xml/file_paths" /></provider>

在res.下的xml文件:

文件名是：file_paths(和清单文件中一致)

<?xml version="1.0" encoding="utf-8"?><paths xmlns:android="http://schemas.android.com/apk/res/android">    <external-path        name="files_root"        path="Android/data/com.lechuang.letaotao/" />    <external-path        name="external_storage_root"        path="." /></paths>

在传输过程中提供图片地址：

public static Uri getUriForFile(Context context, File file) {    if (context == null || file == null) {        throw new NullPointerException();    }    Uri uri;    if (Build.VERSION.SDK_INT >= 24) {        uri = FileProvider.getUriForFile(context, "应用包名.fileProvider", file);    } else {        uri = Uri.fromFile(file);    }    return uri;}

打开照相机：

//android 7.0//  Uri imageUri = FileProvider.getUriForFile(mContext, "应用包名.fileProvider", file);// 7.0 以 // Uri uri = Uri.fromFile(file);
 //适配7.0和7.0一下的地址Uri imageUri = getUriForFile(mContext, file);Intent intent = new Intent();intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);  //把拍照后的图片放在指定的文件intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);startActivityForResult(intent, 2);

相册选择：

Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");  //*代表全部startActivityForResult(intent, 1);

裁剪图片：

public static void resizeImage(Uri uri, Activity activity, int requestCode) {    Intent intent = new Intent("com.android.camera.action.CROP");    intent.setDataAndType(uri, "image/png");             //限定图片类型    intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);  //重要 ，权限要求。    intent.putExtra("crop", "true");// aspectX , aspectY :宽高的比例   intent.putExtra("aspectX", 1);    intent.putExtra("aspectY", 1);// outputX , outputY : 裁剪图片宽高  intent.putExtra("outputX", 150);    intent.putExtra("outputY", 150);    intent.putExtra("return-data", true);    activity.startActivityForResult(intent, requestCode);}

压缩图片：

private void showResizeImage(Intent data) {    Bundle extras = data.getExtras();    if (extras != null) {        Bitmap bitmap = extras.getParcelable("data");        String path = Uri.fromFile(file).getPath();        bitmap =toSmall(bitmap, path);     }}

压缩处理的具体方法：

public static Bitmap toSmall(Bitmap bitmap, String path) {    int scale = 1;    int width_tmp = bitmap.getWidth();    int height_tmp = bitmap.getHeight();    while (true) {        if (width_tmp / 2 < 100 || height_tmp / 2 < 100)            break;        width_tmp /= 2;        height_tmp /= 2;        scale *= 2;    }    Matrix matrix = new Matrix();    matrix.postScale(scale, scale); // 长和宽放大缩小的比例    bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),            bitmap.getHeight(), matrix, true);    try {        FileOutputStream fileOutputStream = new FileOutputStream(path);        try {            bitmap.compress(Bitmap.CompressFormat.PNG, 100,                    fileOutputStream);        } finally {            try {                fileOutputStream.flush();                fileOutputStream.close();            } catch (IOException e) {            }        }    } catch (FileNotFoundException e) {        e.printStackTrace();    }    return bitmap;}

主界面的处理：

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) {    switch (requestCode) {        case 1:            if (resultCode != -1) {                return;            }            .resizeImage(data.getData(), this, 3);    //处理从相册返回的信息：            break;        case 2:            if (resultCode != -1) {                return;            }            if (PhotoUtil.isSdcardExisting()) {           //处理从照相机返回的图片                Uri uriForFile = getUriForFile(mContext, file);                resizeImage(uriForFile, this, 3);          //开始裁剪            } else {                Utils.show(mContext, "未找到存储卡，无法存储照片");            }            break;        case 3:            if (data != null) {                showResizeImage(data);            // 压缩图片            }             break;        default:            break;    }    super.onActivityResult(requestCode, resultCode, data);}

附 Android6.0 文件和照相机权限申请：

private static final int REQUEST_PERMISSION_CAMERA = 222;private static final int REQUEST_PERMISSION_STORAGE = 333;private void setCamear() {    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {        int checkCallPhonePermission = ContextCompat.checkSelfPermission(mContext, Manifest.permission.CAMERA);        if (checkCallPhonePermission != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, REQUEST_PERMISSION_CAMERA);            return;        }    }    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {        int checkCallPhonePermission = ContextCompat.checkSelfPermission(mContext, Manifest.permission.WRITE_EXTERNAL_STORAGE);        if (checkCallPhonePermission != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},  REQUEST_PERMISSION_STORAGE);            return;        }    }}@Overridepublic void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {    switch (requestCode) {        //就像onActivityResult一样这个地方就是判断你是从哪来的。        case REQUEST_PERMISSION_CAMERA:            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {                          } else {                Utils.show(mContext, "很遗憾你把相机权限禁用了!");                finish();            }            break;        case  REQUEST_PERMISSION_STORAGE:            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {                         } else {                // Permission Denied                Utils.show(mContext, "很遗憾你把读取文件权限禁用了!");                finish();            }            break;        default:            super.onRequestPermissionsResult(requestCode, permissions, grantResults);    }}

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