Crash fixes

Author: grishka

mastodon/src/main/java/org/joinmastodon/android/api/ResizedImageRequestBody.java

@@ -12,6 +12,7 @@
 import android.net.Uri;
 import android.os.Build;
 import android.provider.OpenableColumns;
+import android.text.TextUtils;
 
 import org.joinmastodon.android.MastodonApp;
 import org.joinmastodon.android.ui.utils.UiUtils;
@@ -48,6 +49,8 @@ public ResizedImageRequestBody(Uri uri, int maxSize, ProgressListener progressLi
 			}
 			contentType=MastodonApp.context.getContentResolver().getType(uri);
 		}
+		if(TextUtils.isEmpty(contentType))
+			contentType="image/jpeg";
 		if(needResize(opts.outWidth, opts.outHeight) || needCrop(opts.outWidth, opts.outHeight)){
 			Bitmap bitmap;
 			if(Build.VERSION.SDK_INT>=28){

mastodon/src/main/java/org/joinmastodon/android/fragments/discover/SearchFragment.java

@@ -91,6 +91,8 @@ protected void addAccountToKnown(SearchResult s){
 	@Override
 	public void onItemClick(String id){
 		SearchResult res=getResultByID(id);
+		if(res==null)
+			return;
 		switch(res.type){
 			case ACCOUNT -> {
 				Bundle args=new Bundle();

mastodon/src/main/java/org/joinmastodon/android/fragments/onboarding/SignupFragment.java

@@ -200,7 +200,6 @@ private void actuallySubmit(){
 					@Override
 					public void onSuccess(Token result){
 						progressDialog.dismiss();
-						progressDialog=null;
 						Account fakeAccount=new Account();
 						fakeAccount.acct=fakeAccount.username=username;
 						fakeAccount.id="tmp"+System.currentTimeMillis();
@@ -238,7 +237,6 @@ public void onError(ErrorResponse error){
 							error.showToast(getActivity());
 						}
 						progressDialog.dismiss();
-						progressDialog=null;
 					}
 				})
 				.exec(instance.uri, apiToken);
@@ -255,9 +253,11 @@ private EditText getFieldByName(String name){
 	}
 
 	private void showProgressDialog(){
-		progressDialog=new ProgressDialog(getActivity());
-		progressDialog.setMessage(getString(R.string.loading));
-		progressDialog.setCancelable(false);
+		if(progressDialog==null){
+			progressDialog=new ProgressDialog(getActivity());
+			progressDialog.setMessage(getString(R.string.loading));
+			progressDialog.setCancelable(false);
+		}
 		progressDialog.show();
 	}
 
@@ -280,7 +280,6 @@ public void onError(ErrorResponse error){
 						if(submitAfterGettingToken){
 							submitAfterGettingToken=false;
 							progressDialog.dismiss();
-							progressDialog=null;
 							error.showToast(getActivity());
 						}
 					}
@@ -307,7 +306,6 @@ public void onError(ErrorResponse error){
 						if(submitAfterGettingToken){
 							submitAfterGettingToken=false;
 							progressDialog.dismiss();
-							progressDialog=null;
 							error.showToast(getActivity());
 						}
 					}