android拍照与读取相册
16lz
2021-01-23
android拍照与读取相册
先创建选择拍照与读取相册的对话框
布局xml
选择对话框dialog_takephoto_selectimage.xml：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:background="@mipmap/updatebg"> <TextView android:id="@+id/id_textViewTakePhoto" android:layout_width="0dp" android:layout_height="wrap_content" android:text="@string/take_photo" android:textSize="18sp" android:gravity="center" android:layout_weight="1" android:drawablePadding="10dp" android:drawableTop="@mipmap/takephoto"/> <TextView android:id="@+id/id_textViewSelectImage" android:layout_width="0dp" android:gravity="center" android:layout_height="wrap_content" android:text="@string/select_image" android:layout_weight="1" android:textSize="18sp" android:drawablePadding="10dp" android:drawableTop="@mipmap/album"/></LinearLayout>选择对话框类
选择对话框类TakePhotoOrSelectImageDialog ：
/** * //选择照片或者拍照的对话框 */public class TakePhotoOrSelectImageDialog { private Context mContext; private TakePhotoOrSelectImageInterface mListener; public TakePhotoOrSelectImageDialog(Context context){ mContext = context; mListener = (TakePhotoOrSelectImageInterface)mContext; } public void showDialog(){ View view = View.inflate(mContext, R.layout.dialog_takephoto_selectimage, null); TextView textViewTakePhoto = (TextView) view.findViewById(R.id.id_textViewTakePhoto); TextView textViewSelectImage = (TextView) view.findViewById(R.id.id_textViewSelectImage); final Dialog dialog = new Dialog(mContext, R.style.alert_dialog); dialog.setContentView(view); /* Window dialogWindow = dialog.getWindow(); WindowManager.LayoutParams lp = dialogWindow.getAttributes(); DisplayMetrics d = mContext.getResources().getDisplayMetrics(); // 获取屏幕宽、高用 lp.width = (int) (d.widthPixels * 0.9); // 高度设置为屏幕的0.9 dialogWindow.setAttributes(lp);*/ dialog.show(); textViewTakePhoto.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mListener.takePhoto(); dialog.dismiss(); } }); textViewSelectImage.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mListener.selectImage(); dialog.dismiss(); } }); } public interface TakePhotoOrSelectImageInterface { public void takePhoto();//拍照按钮 public void selectImage();//相册选择图片 }}新建一个类，implements TakePhotoOrSelectImageDialog.java接口
/* 图片文件 */ private static final String IMAGE_FILE_NAME = "temp_image.jpg"; private static final String IMAGE_SCROP_FILE_NAME = "temp_scrop_image.jpg"; /* 请求识别码 */ private static final int CODE_GALLERY_REQUEST = 1; private static final int CODE_CAMERA_REQUEST = 2; private static final int CODE_RESULT_REQUEST = 3; textViewAdd.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { TakePhotoOrSelectImageDialog takePhotoOrSelectImageDialog = new TakePhotoOrSelectImageDialog(NewSmartActivity.this); takePhotoOrSelectImageDialog.showDialog(); } }); } // 从本地相册选取图片 private void choseHeadImageFromGallery() { /**Intent intentFromGallery = new Intent(); // 设置文件类型 intentFromGallery.setType("image/*"); intentFromGallery.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(intentFromGallery, CODE_GALLERY_REQUEST);*/ Intent intentFromGallery = new Intent( Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); // 设置文件类型 intentFromGallery.setType("image/*"); startActivityForResult(intentFromGallery, CODE_GALLERY_REQUEST); } // 启动手机相机拍摄照片 private void choseHeadImageFromCameraCapture() { Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // 判断存储卡是否可用，存储照片文件 if (sdcardEnable()) { intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT, Uri .fromFile(new File(Environment .getExternalStorageDirectory(), IMAGE_FILE_NAME))); } startActivityForResult(intentFromCapture, CODE_CAMERA_REQUEST); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // 用户没有进行有效的设置操作，返回 if (resultCode == RESULT_CANCELED) { Toast.makeText(getApplication(), "处理照片失败", Toast.LENGTH_LONG).show(); return; } switch (requestCode) { case CODE_GALLERY_REQUEST: cropRawPhoto(data.getData()); break; case CODE_CAMERA_REQUEST: if (sdcardEnable()) { File tempFile = new File( Environment.getExternalStorageDirectory(), IMAGE_FILE_NAME); cropRawPhoto(Uri.fromFile(tempFile)); } else { Toast.makeText(getApplication(), "没有SDCard!", Toast.LENGTH_LONG) .show(); } break; case CODE_RESULT_REQUEST: if (data != null) { setImageToHeadView(); } break; } } /** * 裁剪原始的图片 */ public void cropRawPhoto(Uri uri) { //上传照片为默认图片尺寸 int[] heightAndWidth=PublicMethod.getImageWidthAndHeight(NewSmartActivity.this,R.mipmap.defaultsmart); Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); // 设置裁剪 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,取默认图片的三倍大小，否则图片太小 intent.putExtra("outputX", heightAndWidth[0]*3); intent.putExtra("outputY", heightAndWidth[1]*3); intent.putExtra("return-data", true); File file = new File(Environment .getExternalStorageDirectory(), IMAGE_SCROP_FILE_NAME); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); startActivityForResult(intent, CODE_RESULT_REQUEST); } /** * 提取保存裁剪之后的图片数据，并设置头像部分的View */ private void setImageToHeadView() { try { Bitmap bitmap = new LoadBigImage().decodeSampledBitmapFromByte(getBytesFromInputStream(new FileInputStream(Environment .getExternalStorageDirectory() + "/" + IMAGE_SCROP_FILE_NAME)), 150, 150); LayoutInflater inflater = LayoutInflater .from(getApplication()); View v = inflater.inflate(R.layout.dialog_show_iamge, null); ImageView imageView1 = (ImageView) v.findViewById(R.id.id_imageShow); imageView1.setImageBitmap(bitmap); AlertDialog.Builder builder = new AlertDialog.Builder(NewSmartActivity.this); builder.setTitle("选择操作"); builder.setView(v); builder.setNegativeButton("上传", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); builder.setPositiveButton("取消", null); builder.create().show(); } catch (Exception e) { e.printStackTrace(); } } /** * 检查设备是否存在SDCard */ public static boolean sdcardEnable() { String state = Environment.getExternalStorageState(); if (state.equals(Environment.MEDIA_MOUNTED)) { // 有存储的SDCard return true; } else { return false; } } //定义一个根据图片url获取InputStream的方法 public static byte[] getBytesFromInputStream(InputStream is) throws IOException { ByteArrayOutputStream outstream = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; // 用数据装 int len = -1; while ((len = is.read(buffer)) != -1) { outstream.write(buffer, 0, len); } outstream.close(); // 关闭流。 return outstream.toByteArray(); }//拍照按钮 @Override public void takePhoto() { choseHeadImageFromCameraCapture(); } //选择照片按钮 @Override public void selectImage() { choseHeadImageFromGallery(); }处理大图片的方法
/** * 加载大尺寸图片 */public class LoadBigImage { private int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) { // 源图片的高度和宽度 final int height = options.outHeight; final int width = options.outWidth; int inSampleSize = 1; if (height > reqHeight || width > reqWidth) { // 计算出实际宽高和目标宽高的比率 final int heightRatio = Math.round((float) height / (float) reqHeight); final int widthRatio = Math.round((float) width / (float) reqWidth); // 选择宽和高中最小的比率作为inSampleSize的值，这样可以保证最终图片的宽和高 // 一定都会大于等于目标的宽和高。 inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio; } return inSampleSize; } public Bitmap decodeSampledBitmapFromResource(Resources res, int resId, int reqWidth, int reqHeight) { // 第一次解析将inJustDecodeBounds设置为true，来获取图片大小 final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeResource(res, resId, options); // 调用上面定义的方法计算inSampleSize值 options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); // 使用获取到的inSampleSize值再次解析图片 options.inJustDecodeBounds = false; return BitmapFactory.decodeResource(res, resId, options); } public Bitmap decodeSampledBitmapFromByte( byte[] data, int reqWidth, int reqHeight) { // 第一次解析将inJustDecodeBounds设置为true，来获取图片大小 final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeByteArray(data, 0, data.length, options); // 调用上面定义的方法计算inSampleSize值 options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); // 使用获取到的inSampleSize值再次解析图片 options.inJustDecodeBounds = false; return BitmapFactory.decodeByteArray(data, 0, data.length, options); } public Bitmap decodeSampledBitmapFromFile( String filename, int reqWidth, int reqHeight) { // 第一次解析将inJustDecodeBounds设置为true，来获取图片大小 final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile(filename, options); //BitmapFactory.decodeByteArray(data, 0, data.length,options); // 调用上面定义的方法计算inSampleSize值 options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); // 使用获取到的inSampleSize值再次解析图片 options.inJustDecodeBounds = false; return BitmapFactory.decodeFile(filename, options); }}更多相关文章
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