Limit to only one instance of the import screen

app_pojavlauncher/src/main/AndroidManifest.xml

@@ -42,6 +42,7 @@
         <activity android:name=".ImportControlActivity"
             android:exported="true"
             android:windowSoftInputMode="stateVisible"
+            android:launchMode="singleInstance"
             android:configChanges="keyboard|keyboardHidden"
             >
 
@@ -51,6 +52,7 @@
                 <action android:name="android.intent.action.SEND"/>
                 <category android:name="android.intent.category.DEFAULT"/>
                 <data android:mimeType="application/json"/>
+                <data android:mimeType="text/json"/>
                 <data android:mimeType="text/plain"/>
             </intent-filter>
         </activity>

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/ImportControlActivity.java

@@ -2,14 +2,9 @@ package net.kdt.pojavlaunch;
 
 import android.app.Activity;
 import android.content.Intent;
-import android.content.pm.ActivityInfo;
-import android.content.pm.PackageManager;
-import android.content.res.Configuration;
 import android.net.Uri;
 import android.os.Bundle;
-import android.util.Log;
 import android.view.View;
-import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.Toast;
 
@@ -17,57 +12,72 @@ import androidx.annotation.Nullable;
 
 import net.kdt.pojavlaunch.utils.FileUtils;
 
-import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.net.URI;
-import java.nio.file.StandardCopyOption;
 
 /**
  * An activity dedicated to importing control files.
  */
 public class ImportControlActivity extends Activity {
 
-    private Uri uriData;
+    private Uri mUriData;
+    private boolean mHasIntentChanged = true;
 
-    private EditText editText;
+    private EditText mEditText;
 
+    
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        //Check if the intent is valid.
-        if (getIntent() == null) finishAndRemoveTask();
-        getUriData();
-        if(uriData == null) finishAndRemoveTask();
-
         Tools.initContextConstants(getApplicationContext());
 
         setContentView(R.layout.import_control_layout);
-        editText = findViewById(R.id.editText_import_control_file_name);
-        //Set the name of the file in the editText.
-        String editTextString = uriData.toString().replaceAll("%..", "/");
-        editTextString = editTextString.substring(editTextString.lastIndexOf('/') + 1);
-        editText.setText(trimFileName(editTextString));
+        mEditText = findViewById(R.id.editText_import_control_file_name);
+    }
 
+    /**
+     * Override the previous loaded intent
+     * @param intent the intent used to replace the old one.
+     */
+    @Override
+    protected void onNewIntent(Intent intent) {
+        if(intent != null) setIntent(intent);
+        mHasIntentChanged = true;
+    }
+
+    /**
+     * Update if the intent changed
+     */
+    @Override
+    protected void onPostResume() {
+        super.onPostResume();
+        if(!mHasIntentChanged) return;
+        getUriData();
+        //Set the name of the file in the editText.
+        String editTextString = mUriData.toString().replaceAll("%..", "/");
+        editTextString = editTextString.substring(editTextString.lastIndexOf('/') + 1);
+        mEditText.setText(trimFileName(editTextString));
+        mHasIntentChanged = false;
     }
 
     /**
      * Start the import.
      * @param view the view which called the function
+     * @return wether the import has started
      */
-    public void startImport(View view) {
-        String fileName = trimFileName(editText.getText().toString());
+    public boolean startImport(View view) {
+        String fileName = trimFileName(mEditText.getText().toString());
         //Step 1 check for suffixes.
         if(!isFileNameValid(fileName)){
             Toast.makeText(this, "Invalid name or file already exists", Toast.LENGTH_SHORT).show();
-            return;
+            return false;
         }
 
         Toast.makeText(getApplicationContext(), "Starting importation", Toast.LENGTH_SHORT).show();
 
+        //Import thread
         new Thread(() -> {
             importControlFile(fileName);
             runOnUiThread(() -> {
@@ -75,18 +85,18 @@ public class ImportControlActivity extends Activity {
                 finishAndRemoveTask();
             });
         }).start();
+        return true;
     }
 
     /**
-     * Copy a the file from the Intent data with a provided name
-     * into the controlmap folder.
+     * Copy a the file from the Intent data with a provided name into the controlmap folder.
      * @param fileName The file name to use.
      * @return whether the file was successfully imported
      */
     private boolean importControlFile(String fileName){
         InputStream is;
         try {
-            is = getContentResolver().openInputStream(uriData);
+            is = getContentResolver().openInputStream(mUriData);
 
             OutputStream os = new FileOutputStream(Tools.CTRLMAP_PATH + "/" + fileName + ".json");
             byte[] buffer = new byte[1024];
@@ -134,10 +144,10 @@ public class ImportControlActivity extends Activity {
      * Tries to get an Uri from the various sources
      */
     private void getUriData(){
-        uriData = getIntent().getData();
-        if(uriData != null) return;
+        mUriData = getIntent().getData();
+        if(mUriData != null) return;
         try {
-            uriData = getIntent().getClipData().getItemAt(0).getUri();
+            mUriData = getIntent().getClipData().getItemAt(0).getUri();
         }catch (Exception ignored){}
     }