private static final int PERMISSION_READ_EXTERNAL_STORAGE = 101;private static final int PERMISSION_WRITE_EXTERNAL_STORAGE = 102;private static final int PERMISSION_CAMERA = 103;private void requestPermission() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)== PackageManager.PERMISSION_DENIED) {  ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_WRITE_EXTERNAL_STORAGE); } if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, PERMISSION_READ_EXTERNAL_STORAGE); } if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_DENIED) {  ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, PERMISSION_CAMERA); }}@Overridepublic void onRequestPermissionsResult(int requestCode, String permissions[], int []grantResults) { switch (requestCode) {  case PERMISSION_CAMERA: {   if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {   } else {    Toast.makeText(this, "沒有攝像頭權限我什么都做不了哦!", Toast.LENGTH_LONG).show();   }   break;  }  case PERMISSION_READ_EXTERNAL_STORAGE: {   if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {   } else {    Toast.makeText(this, "請打開存儲讀寫權限，確保APP正常運行", Toast.LENGTH_LONG).show();;   }   break;  }  case PERMISSION_WRITE_EXTERNAL_STORAGE: {   if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {   } else {    Toast.makeText(this, "請打開存儲讀寫權限，確保APP正常運行", Toast.LENGTH_LONG).show();;   }   break;  } }}

private void requestPermission() { List<String> permissionsNeeded = new ArrayList<String>(); if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)== PackageManager.PERMISSION_DENIED) {  permissionsNeeded.add(Manifest.permission.WRITE_EXTERNAL_STORAGE); } if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  permissionsNeeded.add(Manifest.permission.READ_EXTERNAL_STORAGE); } if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_DENIED) {  permissionsNeeded.add(Manifest.permission.CAMERA); } if(permissionsNeeded.size()>0){  ActivityCompat.requestPermissions(this, permissionsNeeded.toArray(new String[permissionsNeeded.size()]), 1); }}@Overridepublic void onRequestPermissionsResult(int requestCode, String permissions[], int []grantResults) { switch (requestCode) {  case 1: {   if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {    if (grantResults.length > 0 && grantResults[1] == PackageManager.PERMISSION_GRANTED) {     if (grantResults.length > 0 && grantResults[2] == PackageManager.PERMISSION_GRANTED) {     } else {      dialog();     }    } else {     dialog();    }   } else {    dialog();   }   break;  } }}