Android 7.0呼叫相機/相簿/裁剪
阿新 • • 發佈：2019-02-20
Android 呼叫相機/相簿/裁剪，6.0需要申請許可權，7.0有路勁安全問題
1、安全問題需要設定共享路勁，需要在AndroidManifest.xml裡的application下設定provider
<!--//路徑安全問題
android:authorities的值要跟我們要跟獲取uri一致
exported:要求必須為false，為true則會報安全異常。
grantUriPermissions:true，表示授予 URI 臨時訪問許可權。
<meta-data />標籤裡面是用來指定共享的路徑。
android:resource="@xml/file_paths"就是我們的共享路徑配置的xml檔案，
--> 2、在res目錄下的xml資料夾裡建立file_paths
<?xml version="1.0" encoding="utf-8"?>
<paths>
<paths>
<external-path name="camera_photos" path="" />
</paths 3、先建立圖片路勁
private File tempFile = new File(Environment.getExternalStorageDirectory(), getPhotoFileName());
/*
* 拍照時 7.0以下imageUri=Uri.fromFile(tempFile);
* 7.0以上imageUri = FileProvider.getUriForFile(UserCenterActivity.this, "com.company.projectname.fileprovider", tempFile);//第二個引數和清單檔案android:authorities一致
*/
private Uri imageUri;
// 使用系統當前日期加以調整作為照片的名稱,避免名字一樣
private String getPhotoFileName() {
Date date = new Date(System.currentTimeMillis());
SimpleDateFormat sdf = new SimpleDateFormat("'PNG'_yyyyMMdd_HHmmss", Locale.CHINA);
return sdf.format(date) + ".jpg";
}
4、呼叫拍照/相簿/裁剪功能（6.0需要在程式碼裡申請許可權）
// 呼叫拍照（6.0需要在程式碼裡申請許可權）——點選拍照時呼叫
if (ContextCompat.checkSelfPermission(UserCenterActivity.this, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
//申請WRITE_EXTERNAL_STORAGE許可權
ActivityCompat.requestPermissions(UserCenterActivity.this, new String[]{Manifest.permission.CAMERA},
Permission_CAMERA);
} else {
startCamera();//開啟相機
}相機（7.0）和相簿
private static final int PHOTO_CARMERA = 1; //相機
private static final int PHOTO_PICK = 2;
private static final int PHOTO_CUT = 3; //裁剪
private static final int EXTRA_OUTPUT = 4;
//許可權請求
private static final int Permission_CAMERA = 11;
private static final int READ_EXTERNAL_STORAGE = 12;
private void startCamera() {
// 呼叫系統的拍照功能
Intent intent = new Intent();
//新增這一句表示對目標應用臨時授權該Uri所代表的檔案 >>>>>>>>>>>>add
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {//7.0系統（7.0）
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
imageUri=FileProvider.getUriForFile(UserCenterActivity.this, "com.company.projectname.fileprovider", tempFile);
}else {
imageUri =Uri.fromFile(tempFile);
}
intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE); //設定Action為拍照
// 指定呼叫相機拍照後照片的儲存路徑
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, PHOTO_CARMERA);
}
// 呼叫相簿
private void startPick() {
// 呼叫系統相簿
Intent intent =new Intent(Intent.ACTION_PICK,null);
//此處呼叫了圖片選擇器
//如果直接寫intent.setDataAndType("image/*");
//呼叫的是系統圖庫
imageUri =Uri.fromFile(tempFile);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, PHOTO_PICK);
}
裁剪
//相簿——裁剪
private void setPhoto_Pick(Intent data) {
Intent intent = new Intent("com.android.camera.action.CROP");
//此處註釋掉的部分是針對android 4.4路徑修改的一個測試
//有興趣的讀者可以自己除錯看看
intent.setDataAndType(data.getData(), "image/*");
intent.putExtra("scale", true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { //7.0
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
// imageUri=FileProvider.getUriForFile(UserCenterActivity.this, "com.weiyang.bojiuvedio.fileprovider", tempFile);
}
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, EXTRA_OUTPUT);
}
// 相機——呼叫系統裁剪
private void startPhotoZoom(Uri uri, int size) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// crop為true是設定在開啟的intent中設定顯示的view可以裁剪
intent.putExtra("crop", true);
// aspectX,aspectY是寬高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX,outputY是裁剪圖片的寬高
intent.putExtra("outputX", size);
intent.putExtra("outputY", size);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { //7.0
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
// imageUri=FileProvider.getUriForFile(UserCenterActivity.this, "com.weiyang.bojiuvedio.fileprovider", tempFile);
}
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
intent.putExtra("scale", true);
// 設定是否返回資料
intent.putExtra("return-data", false);
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(intent, PHOTO_CUT);
}相機拍照的結果顯示在image上（7.0）
// 將裁剪後的圖片顯示在ImageView上，需要從共享路徑獲取
private void setPicToView() {
if (imageUri != null) {
Log.i("imageUri......",">>>>1111"+imageUri);
ContentResolver contentProvider = getContentResolver();//7.0從共享檔案獲取
ParcelFileDescriptor mInputPFD;
try {
mInputPFD = contentProvider.openFileDescriptor(imageUri, "r");
FileDescriptor fileDescriptor = mInputPFD.getFileDescriptor();
userImage.setImageBitmap(BitmapFactory.decodeFileDescriptor(fileDescriptor));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}返回處理
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// 使用者沒有進行有效的設定操作，返回
if (resultCode == RESULT_CANCELED) {
return;
}
switch (requestCode){
// 調取相機拍照後——裁剪
case PHOTO_CARMERA:
// setPicToView();
startPhotoZoom(imageUri, 200); //裁剪
break;
// 剪裁後的圖片
case PHOTO_CUT:
if (data != null) {
setPicToView();
}
break;
//相簿_此處啟動裁剪程式 21
case PHOTO_PICK:
if(data!=null){
setPhoto_Pick(data);
}
break;
case EXTRA_OUTPUT: //22
if (ContextCompat.checkSelfPermission(UserCenterActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(UserCenterActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
READ_EXTERNAL_STORAGE);
} else {
try {
//將output_image.jpg物件解析成Bitmap物件，然後設定到ImageView中顯示出來
Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(imageUri));
userImage.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
break;
}
super.onActivityResult(requestCode, resultCode, data);
}許可權返回處理
//許可權返回處理
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case Permission_CAMERA://呼叫相機許可權
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// Permission Granted
startCamera();
} else {
// Permission Denied
Toast.makeText(getApplicationContext(), "請求許可權失敗，請手動開啟許可權", Toast.LENGTH_SHORT).show();
}
break;
case READ_EXTERNAL_STORAGE:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// Permission Granted
try {
//將output_image.jpg物件解析成Bitmap物件，然後設定到ImageView中顯示出來
Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(imageUri));
userImage.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
} else {
// Permission Denied
Toast.makeText(getApplicationContext(), "請求許可權失敗，請手動開啟許可權", Toast.LENGTH_SHORT).show();
}
break;
}
}