如何在上传到firebase时压缩图像

我正在开发一个社交应用程序，用户可以在其订阅源上上传他们的图像，但当用户拾取图像时，小于2mb的图像会被拾取并成功上传到firebase，但当该用户上传的图像超过2mb时，应用程序会崩溃。可以做些什么来压缩图像。。

postactivity.java

private Toolbar mToolbar;
private ImageButton SelectPostImage;
private Button UpdatePostButton;
private ProgressDialog loadingBar;
private EditText PostDescription;
private static  final  int Gallery_pick = 1;
private Uri ImageUri;
private  String Description;
private StorageReference PostsImagesReference;
private DatabaseReference usersRef, PostsRef;
private  FirebaseAuth mAuth;
private  String saveCurrentDate, saveCurrentTime,current_user_id, postRandomName, downloadUrl;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post);
mAuth = FirebaseAuth.getInstance();
current_user_id = mAuth.getCurrentUser().getUid();
PostsImagesReference = FirebaseStorage.getInstance().getReference();
usersRef = FirebaseDatabase.getInstance().getReference().child("Users");
PostsRef = FirebaseDatabase.getInstance().getReference().child("Posts");
SelectPostImage = (ImageButton)findViewById(R.id.select_post_image);
UpdatePostButton = (Button) findViewById(R.id.update_post_button);
PostDescription = (EditText)findViewById(R.id.post_description);
loadingBar = new ProgressDialog(this);

mToolbar = (Toolbar) findViewById(R.id.update_post_page_toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setTitle("Update Post");
SelectPostImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
OpenGallery();
}
});
UpdatePostButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ValidatePostInfo();
}
});

}
private void ValidatePostInfo() {
Description = PostDescription.getText().toString();
if (ImageUri == null){
Toast.makeText(this, "Please select the image", Toast.LENGTH_SHORT).show();
}
if (TextUtils.isEmpty(Description)){
Toast.makeText(this,"Please write something here",Toast.LENGTH_SHORT).show();
}else {
loadingBar.setTitle(" Add New Post");
loadingBar.setMessage("Please wait, while we updating your new post");
loadingBar.show();
loadingBar.setCanceledOnTouchOutside(true);
StoringImageToFirebaseStorage();
}
}
private void StoringImageToFirebaseStorage() {
Calendar calForDate = Calendar.getInstance();
SimpleDateFormat currentDate = new SimpleDateFormat("dd-MMMM-yyyy");
saveCurrentDate = currentDate.format(calForDate.getTime());
Calendar calFordTime = Calendar.getInstance();
SimpleDateFormat currentTime = new SimpleDateFormat("HH: mm");
saveCurrentTime = currentTime.format(calForDate.getTime());
postRandomName = saveCurrentDate + saveCurrentTime;
StorageReference filePath = PostsImagesReference.child("Post Images").child(ImageUri.getLastPathSegment() + postRandomName + ".jpg");
filePath.putFile(ImageUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
if (task.isSuccessful()){
downloadUrl = task.getResult().getDownloadUrl().toString();
Toast.makeText(PostActivity.this,"Image is sucessfully uploaded to storage",Toast.LENGTH_LONG).show();
SavingPostInformationToDatabase();
}else{
String message = task.getException().getMessage();
Toast.makeText(PostActivity.this,"Error Occured:" + message,Toast.LENGTH_SHORT).show();
}
}
});
}
private void SavingPostInformationToDatabase() {
usersRef.child(current_user_id).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()){
String userfullname = dataSnapshot.child("fullname").getValue().toString();
String userProfileImage  = dataSnapshot.child("profileimage").getValue().toString();
HashMap postsMap = new HashMap();
postsMap.put("uid",current_user_id);
postsMap.put("date",saveCurrentDate);
postsMap.put("time",saveCurrentTime);
postsMap.put("description",Description);
postsMap.put("postimage",downloadUrl);
postsMap.put("profileimage",userProfileImage);
postsMap.put("fullname",userfullname);
PostsRef.child(current_user_id + postRandomName).updateChildren(postsMap)
.addOnCompleteListener(new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
if (task.isSuccessful()){
SendUserToMainActivity();
Toast.makeText(PostActivity.this,"Your New Post is Updated Sucessfully",Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
}else{
Toast.makeText(PostActivity.this,"Error Occured while updating your post .please try again ",Toast.LENGTH_LONG).show();
loadingBar.dismiss();
}
}
});

}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void OpenGallery() {
Intent galleryIntent = new Intent();
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
startActivityForResult(galleryIntent, Gallery_pick);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == Gallery_pick && resultCode == RESULT_OK && data != null){
ImageUri = data.getData();
SelectPostImage.setImageURI(ImageUri);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home){
SendUserToMainActivity();
}
return super.onOptionsItemSelected(item);
}
private void SendUserToMainActivity() {
Intent mainintent  =  new Intent(PostActivity.this,MainActivity.class);
startActivity(mainintent);
}
}