清单文件中增加对应权限，动态申请权限（此部分请参考Android 动态申请权限，在此不作为重点描述）
private static final int REQUEST_CODE_ALBUM = 100;//打开相册private static final int REQUEST_CODE_CAMERA = 101;//打开相机
//调用相册private void openAlbum(){ Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("image/*"); startActivityForResult(intent, REQUEST_CODE_ALBUM);}
//调用相机private void openCamera1(){ Intent intent; intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(intent, REQUEST_CODE_CAMERA);}
@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode == REQUEST_CODE_ALBUM && resultCode == RESULT_OK){ if (data != null) { // 照片的原始资源地址 Uri uri = data.getData(); String path = uri.getPath(); ContentResolver cr = context.getContentResolver(); try { Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri)); /* 将Bitmap设定到ImageView */ imageView.setImageBitmap(bitmap); } catch (FileNotFoundException e) { Log.e("Exception", e.getMessage(), e); }
} }else if(requestCode == REQUEST_CODE_CAMERA && resultCode == RESULT_OK){ if(data != null && data.getData() != null){ Bundle extras = data.getExtras(); if (extras != null) { Bitmap bitmap = extras.getParcelable("data"); /* 将Bitmap设定到ImageView */ imageView.setImageBitmap(bitmap); //可将图片保存下来，用于上传或其他操作（如果不需要可以省略此步） String path = savePicToSdcard(image,Environment.getExternalStorageDirectory().getPath(),System.currentTimeMillis() + ".jpg");
} } }}
public static String savePicToSdcard(Bitmap bitmap, String path, String fileName) { String filePath = ""; if (bitmap != null) { filePath = path + File.separator + fileName; File destFile = new File(filePath); OutputStream os = null; try { os = new FileOutputStream(destFile); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os); os.flush(); os.close(); } catch (IOException e) { filePath = ""; } } return filePath;}
上述相机方法相片清晰度低，获取的是返回对象中的略缩图；如对照片清晰度有要求，可以在上面方法的基础上进行修改，方法如下：需要在清单文件中application中增加如下代码：
<provider android:name="android.support.v4.content.FileProvider" android:authorities="${applicationId}.fileprovider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" /></provider>创建file_paths.xml文件项目目录res下创建xml文件夹，xml文件夹下创建file_paths.xml文件，文件内容：
<?xml version="1.0" encoding="utf-8"?><paths> <external-path name="external_storage_root" path="." /></paths>配置完成后，修改增加如下代码：
private static final int REQUEST_RESULT_CODE = 102;//裁剪后保存
//调用相机（指定相机拍摄照片保存地址，相片清晰度高）private void openCamera2(){ String photoPath = Environment.getExternalStorageDirectory().getPath()+"/"+File.separator+"123.jpg"; File pictureFile = new File(photoPath); Uri picUri; Intent intent; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); String packageName = context.getApplicationContext().getPackageName(); picUri = FileProvider.getUriForFile(context, new StringBuilder(packageName).append(".fileprovider").toString(), pictureFile); } else { intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); picUri = Uri.fromFile(pictureFile); } intent.putExtra(MediaStore.EXTRA_OUTPUT, picUri); startActivityForResult(intent, REQUEST_CODE_CAMERA);}
@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode == REQUEST_CODE_ALBUM && resultCode == RESULT_OK){ if (data != null) { // 照片的原始资源地址 Uri uri = data.getData(); String path = uri.getPath(); ContentResolver cr = context.getContentResolver(); try { Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri)); /* 将Bitmap设定到ImageView */ imageView.setImageBitmap(bitmap); } catch (FileNotFoundException e) { Log.e("Exception", e.getMessage(), e); } } }else if(requestCode == REQUEST_CODE_CAMERA && resultCode == RESULT_OK){ File tempFile = new File(photoPath); cropImg(getImageContentUri(tempFile));//对照片进行裁剪保存 }else if(requestCode ==REQUEST_RESULT_CODE && resultCode == RESULT_OK){ try { Bitmap image = BitmapFactory.decodeStream(getContentResolver().openInputStream(mUriPath)); /* 将Bitmap设定到ImageView */ imageView.setImageBitmap(bitmap); } catch (FileNotFoundException e) { e.printStackTrace(); } }}
public Uri getImageContentUri(File imageFile) {
String filePath = imageFile.getAbsolutePath(); Cursor cursor = getContentResolver().query( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[]{MediaStore.Images.Media._ID}, MediaStore.Images.Media.DATA + "=? ", new String[]{filePath}, null); if (cursor != null && cursor.moveToFirst()) { int id = cursor.getInt(cursor .getColumnIndex(MediaStore.MediaColumns._ID)); Uri baseUri = Uri.parse("content://media/external/images/media"); return Uri.withAppendedPath(baseUri, "" + id); } else { if (imageFile.exists()) { ContentValues values = new ContentValues(); values.put(MediaStore.Images.Media.DATA, filePath); return getContentResolver().insert( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); } else { return null; } }}public void cropImg(Uri uri){
Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); //实现对图片的裁剪，必须要设置图片的属性和大小 intent.putExtra("crop", "true"); //滑动选中图片区域 intent.putExtra("aspectX", 1); //裁剪框比例1:1 intent.putExtra("aspectY", 1); intent.putExtra("outputX", 700); //输出图片大小 intent.putExtra("outputY", 700); intent.putExtra("return-data", true); //有返回值 String mLinshi = System.currentTimeMillis() + ".jpg"; photoFile = new File(Environment.getExternalStorageDirectory().getPath(), mLinshi); mUriPath = Uri.parse("file://" + photoFile.getAbsolutePath()); //将裁剪好的图输出到所建文件中 intent.putExtra(MediaStore.EXTRA_OUTPUT, mUriPath); intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); //注意：此处应设置return-data为false，如果设置为true，是直接返回bitmap格式的数据，耗费内存。设置为false，然后，设置裁剪完之后保存的路径，即：intent.putExtra(MediaStore.EXTRA_OUTPUT, uriPath); intent.putExtra("return-data", false); startActivityForResult(intent, REQUEST_RESULT_CODE);}