android 调用系统裁剪,Android调用系统相机、相册、裁剪

github源码地址：https://github.com/mahuanh/algorithmpro(该项目首页洗牌算法中用到了调用系统相机、相册、裁剪的功能)

权限

1、清单文件声明权限

2、Android6.0 动态申请权限

3、Android7.0 文件读写权限适配

项目Application文件 的oncreate方法中 初始化 FileProvider

private void initFileProvider() {

// 解决7.0以上版本的FileProvider问题

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();

StrictMode.setVmPolicy(builder.build());

}

}

调用系统相机

public static File mCameraTmpFile;

/**

* 打开相机

*/

public void openCamera() {

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

if (cameraIntent.resolveActivity(getActivity().getPackageManager()) != null) {

mCameraTmpFile = createTmpFile(this); // 设置系统相机拍照后的输出路径, 创建临时文件

cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mCameraTmpFile));

MyLog.info("==openCamera,mCameraTmpFile-->" + mCameraTmpFile);

startActivityForResult(cameraIntent, 1001);

} else {

MyToast.showToast("没有系统相机");

}

}

调用系统相册

/**

* 打开相册

*/

public void openZooM() {

Intent intent = new Intent();

intent.addCategory(Intent.CATEGORY_OPENABLE);

intent.setType("image/*");

if (Build.VERSION.SDK_INT < 19) {

intent.setAction(Intent.ACTION_GET_CONTENT);

} else {

intent.setAction(Intent.ACTION_OPEN_DOCUMENT);

}

getActivity().startActivityForResult(intent, 1002);

}

android 拍照或者相册选择照片后 调用裁剪，提示“无法加载此图片”

解决方法是在裁剪的代码里加上下面的代码：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

}

调用系统裁剪

//裁剪

private void startPhotoZoom(Uri uri) {

Intent intent = new Intent("com.android.camera.action.CROP");

intent.setDataAndType(uri, "image/*");

intent.putExtra("crop", "true");

intent.putExtra("scale", true);// 去黑边

intent.putExtra("scaleUpIfNeeded", true);// 去黑边

intent.putExtra("aspectX", 1);

intent.putExtra("aspectY", 1);

intent.putExtra("outputX", 400);

intent.putExtra("outputY", 400);

//解决 android 拍照或者相册选择照片后 调用裁剪，提示“无法加载此图片” 问题

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

}

intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(createTmpFile(this)));

intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());

intent.putExtra("return-data", false);

intent.putExtra("noFaceDetection", true);

startActivityForResult(intent, 1003);

}

private File mCropOutPutFile;

public File createTmpFile(Context context) {

String state = Environment.getExternalStorageState();

if (state.equals(Environment.MEDIA_MOUNTED)) { // 已挂载

// File pic = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);

File pic = Environment.getExternalStorageDirectory();

if (!pic.exists()) {

pic.mkdirs();

}

MyLog.e("Lee", "已挂载: pic dir = " + pic.getAbsolutePath());

String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.CHINA).format(new Date());

String fileName = TextUtils.concat("multi_image_", timeStamp, ".jpg").toString();

mCropOutPutFile = new File(pic, fileName);

return mCropOutPutFile;

} else {

File cacheDir = context.getCacheDir();

MyLog.e("Lee", "未挂载: pic dir = " + cacheDir.getAbsolutePath());

String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.CHINA).format(new Date());

String fileName = TextUtils.concat("multi_image_", timeStamp, ".jpg").toString();

mCropOutPutFile = new File(cacheDir, fileName);

return mCropOutPutFile;

}

}

@Override

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

super.onActivityResult(requestCode, resultCode, data);

String absoluteImagePath;

if (resultCode != Activity.RESULT_OK) {

return;

}

switch (requestCode) {

case 1001://相机

if (mCameraTmpFile != null && mCameraTmpFile.exists()) {

//开始裁剪

startPhotoZoom(Uri.fromFile(mCameraTmpFile));

}

break;

case 1002://相册

Uri uri = data.getData();

MyLog.info(uri + "");

//开始裁剪

startPhotoZoom(uri);

break;

case 1003://裁剪

if (mCropOutPutFile != null) {

if (data == null) {

return;

}

absoluteImagePath = mCropOutPutFile.getAbsolutePath();

......

}

break;

}

}