Android 调用系统相机拍照（适配7.0）、从图库选择图片；从数据库读取联系人信息、相册图片

来源：互联网发布：3d打印软件编辑：程序博客网时间：2024/05/21 10:27

一、调用系统相册图库(sdk23以上需要动态申请权限)：

1. 调用系统相机拍照

注：android 7.0(sdk 24)之后拍照发生了改变，需用ContentValues或者FileProvider。

①使用ContentValues

//获取版本

    int currentapiVersion = Build.VERSION.SDK_INT;    // 激活相机    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    //设置图片路径    photo_camera_name = Environment.getExternalStorageDirectory() + "/test" + System.currentTimeMillis() + ".jpg";    File tempFile = new File(photo_camera_name);    if (currentapiVersion < 24) {        // 从文件中创建uri        Uri uri = Uri.fromFile(tempFile);        intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);    } else {        //兼容android7.0 使用共享文件的形式        ContentValues contentValues = new ContentValues(1);        contentValues.put(MediaStore.Images.Media.DATA, tempFile.getAbsolutePath());        Uri uri = getApplication().getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);        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, 100);
②使用FileProvider
 one.在res资源文件夹下创建xml文件夹，再在xml文件夹下面创建文件files_path.xml;写入以下内容
<resources>    <paths>        <external-path            name="camera_photos"            path="" />    </paths></resources>
two.在androidManifests.xml文件中注册provider：
<provider    android:name="android.support.v4.content.FileProvider"    android:authorities="com.example.test.fileprovider"  //这里的authorities自己定义，在后面用到    android:exported="false"    android:grantUriPermissions="true">    <meta-data        android:name="android.support.FILE_PROVIDER_PATHS"        android:resource="@xml/file_path" /></provider>
three.
  photo_camera_name =Environment.getExternalStorageDirectory() + "/test"+ System.currentTimeMillis() + ".jpg";  File file = new File(photo_camera_name);  if (!file.getParentFile().exists()) {      file.getParentFile().mkdirs();  }  Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  //Android7.0以上URI  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {      //添加这一句表示对目标应用临时授权该Uri所代表的文件      intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);      //通过FileProvider创建一个content类型的Uri      Uri uri = FileProvider.getUriForFile(PhotoActivity.this, "com.example.test.fileprovider", file);
     //这里第二个参数的内容要和前面mainifests.xml文件中注册的provider中的authorities一致      intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);  } else {      intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));  }  startActivityForResult(intent, 100);

2.从图库选择图片

 Intent openAlbumIntent = new Intent(Intent.ACTION_GET_CONTENT);                openAlbumIntent.setDataAndType(                        MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");                startActivityForResult(openAlbumIntent, 101);

3.结果回调

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        // 拍照        if (requestCode == 100) {            if (resultCode == RESULT_CANCELED) {                Toast.makeText(context, "取消选择！",                        Toast.LENGTH_SHORT).show();                return;            }            //            Bundle extras = data.getExtras();            Bitmap bitmap = (Bitmap) extras.get("data")           Bitmap newBitmap = ImageTools.zoomBitmap(bitmap, bitmap.getWidth()                    / SCALE, bitmap.getHeight() / SCALE);           bitmap.recycle();
        }

 // 从相册获取        if (requestCode == 101) {            if (resultCode == RESULT_CANCELED) {                Toast.makeText(context, "取消选择！",                        Toast.LENGTH_SHORT).show();            } else {                ContentResolver resolver = getContentResolver();                // 照片的原始资源地址                Uri originalUri = data.getData();                try {                    // 使用ContentProvider通过URI获取原始图片                    Bitmap photo = MediaStore.Images.Media.getBitmap(resolver,                            originalUri);                    if (photo != null) {                        // 为防止原始图片过大导致内存溢出，这里先缩小原图显示，然后释放原始Bitmap占用的内存                        Bitmap smallBitmap = ImageTools.zoomBitmap(photo,                                photo.getWidth() / SCALE, photo.getHeight()                                        / SCALE);                        // 释放原始图片占用的内存，防止out of memory异常发生                        photo.recycle();                                        }                } catch (FileNotFoundException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }        }
    }

二、从数据库读取：

1.读取相册列表

privateList<AlbumBean>data=newArrayList<>();

ContentResolvercr=context.getContentResolver();

  /**     * 获取手机中的相册     *     * @description：     */    private void getPicsFromPhone() {        int i = 0;        String selection = "0=0) group by (" + MediaStore.Images.Media.BUCKET_DISPLAY_NAME;        String[] projection = {MediaStore.Images.Media.BUCKET_DISPLAY_NAME, "count(*) as image_count"};        Cursor cursor = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, selection, null, MediaStore.Images.Media._ID + " desc");        if (cursor.moveToFirst()) {            do {                i++;                String name = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.BUCKET_DISPLAY_NAME));                int count = cursor.getInt(cursor.getColumnIndex("image_count"));                //插入获取默认图代码  /*  此处插入下面查询默认图标代码  */</span>                Log.i("---" + i + "---", name + "----" + count);                String frist = getPhotoList(name);                AlbumBean bean = new AlbumBean(name, count,frist);                           } while (cursor.moveToNext());        }    }//获取相册第一张图片做为封面 private String getPhotoList(String name) {        String path = null;        String[] defaltProjection = {MediaStore.Images.Media._ID, MediaStore.Images.Media.DATA};//获取文件夹默认图片信息        Cursor defaltCursor = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, defaltProjection, MediaStore.Images.Media.BUCKET_DISPLAY_NAME + "='" + name + "'", null, MediaStore.Images.Media._ID + " desc");//默认图只要一个   所以只查询一个最新的        int i = 0;        while (defaltCursor.moveToFirst()) {            i++;            int _id = defaltCursor.getInt(defaltCursor.getColumnIndex(MediaStore.Images.Media._ID));            String bigPath = defaltCursor.getString(defaltCursor.getColumnIndex(MediaStore.Images.Media.DATA));//该路径为大图的路径  有时可能我们会去获取缩略图，所以需要查看缩略图            //获得该图片缩略图            String[] projectionThumb = {MediaStore.Images.Thumbnails.DATA};            Cursor cursorprojectionThumb = cr.query(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, projectionThumb, MediaStore.Images.Thumbnails.IMAGE_ID + "=" + _id, null, null);//获取缩略图地址            if (cursorprojectionThumb.moveToFirst()) {//存在缩略图                path = cursorprojectionThumb.getString(cursorprojectionThumb.getColumnIndex(MediaStore.Images.Thumbnails.DATA));            }            if (cursorprojectionThumb != null) {                cursorprojectionThumb.close();            }            if (TextUtils.isEmpty(path)) {//如果不存在缩略图                path = bigPath;            }            Log.i("---" + i + "---", path);            break;        }        if (defaltCursor != null) {            defaltCursor.close();        }        return path;    }

2.读取相册里的图片

 private void getPhotoList(String name) {        String[] defaltProjection = {MediaStore.Images.Media._ID, MediaStore.Images.Media.DATA};//获取文件夹默认图片信息        Cursor defaltCursor = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, defaltProjection, MediaStore.Images.Media.BUCKET_DISPLAY_NAME + "='" + name + "'", null, MediaStore.Images.Media._ID + " desc");//默认图只要一个   所以只查询一个最新的        int i = 0;        while (defaltCursor.moveToNext()) {            i++;            int _id = defaltCursor.getInt(defaltCursor.getColumnIndex(MediaStore.Images.Media._ID));            String bigPath = defaltCursor.getString(defaltCursor.getColumnIndex(MediaStore.Images.Media.DATA));//该路径为大图的路径  有时可能我们会去获取缩略图，所以需要查看缩略图            //获得该图片缩略图            String[] projectionThumb = {MediaStore.Images.Thumbnails.DATA};            Cursor cursorprojectionThumb = cr.query(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, projectionThumb, MediaStore.Images.Thumbnails.IMAGE_ID + "=" + _id, null, null);//获取缩略图地址            String path = null;            if (cursorprojectionThumb.moveToFirst()) {//存在缩略图                path = cursorprojectionThumb.getString(cursorprojectionThumb.getColumnIndex(MediaStore.Images.Thumbnails.DATA));            }            if (cursorprojectionThumb != null) {                cursorprojectionThumb.close();            }            if (TextUtils.isEmpty(path)) {//如果不存在缩略图                path = bigPath;            }            Log.i("---" + i + "---", path);                }        if (defaltCursor != null) {            defaltCursor.close();        }    }

3.读取手机联系人

   private static final String PHONE_BOOK_LABLE = "phonebook_label";   private List<ContactsModel> contactsModelList = new ArrayList<>();    /**     * 需要查询的字段     **/    private static final String[] PHONES_PROJECTION = {ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME            , ContactsContract.CommonDataKinds.Phone.NUMBER, PHONE_BOOK_LABLE};    /**     * 联系人显示名称     **/    private static final int PHONES_DISPLAY_NAME_INDEX = 0;    /**     * 电话号码     **/    private static final int PHONES_NUMBER_INDEX = 1;

private void getData(){        ContentResolver mResolver = getContentResolver();        //查询联系人数据，query的参数Phone.SORT_KEY_PRIMARY表示将结果集按Phone.SORT_KEY_PRIMARY排序        Cursor cursor = mResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI                , PHONES_PROJECTION, null, null, ContactsContract.CommonDataKinds.Phone.SORT_KEY_PRIMARY);        if (cursor != null) {            while (cursor.moveToNext()) {                ContactsModel model = new ContactsModel();                model.setPhone(cursor.getString(PHONES_NUMBER_INDEX));                if (TextUtils.isEmpty(model.getPhone())) {                    continue;                }                model.setName(cursor.getString(PHONES_DISPLAY_NAME_INDEX));                model.setPhonebook_label(cursor.getString(cursor.getColumnIndex(PHONE_BOOK_LABLE)));                contactsModelList.add(model);            }            cursor.close();        }        handler.sendEmptyMessage(1);    }

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