Added image keyboard support

app/src/main/java/eu/faircode/email/EditTextCompose.java

@@ -1,12 +1,21 @@
 package eu.faircode.email;
 
 import android.content.Context;
+import android.net.Uri;
 import android.os.Build;
+import android.os.Bundle;
 import android.util.AttributeSet;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputConnection;
 
 import androidx.appcompat.widget.AppCompatEditText;
+import androidx.core.view.inputmethod.EditorInfoCompat;
+import androidx.core.view.inputmethod.InputConnectionCompat;
+import androidx.core.view.inputmethod.InputContentInfoCompat;
 
 public class EditTextCompose extends AppCompatEditText {
+    private IInputContentListener listener = null;
+
     public EditTextCompose(Context context) {
         super(context);
     }
@@ -26,4 +35,41 @@ public class EditTextCompose extends AppCompatEditText {
         else
             return super.onTextContextMenuItem(id);
     }
+
+    @Override
+    public InputConnection onCreateInputConnection(EditorInfo editorInfo) {
+        //https://developer.android.com/guide/topics/text/image-keyboard
+        InputConnection ic = super.onCreateInputConnection(editorInfo);
+
+        EditorInfoCompat.setContentMimeTypes(editorInfo, new String[]{"image/*"});
+
+        return InputConnectionCompat.createWrapper(ic, editorInfo, new InputConnectionCompat.OnCommitContentListener() {
+            @Override
+            public boolean onCommitContent(InputContentInfoCompat info, int flags, Bundle opts) {
+                Log.i("Uri=" + info.getContentUri());
+                try {
+                    if (listener == null)
+                        throw new IllegalArgumentException("InputContent listener not set");
+
+                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1 &&
+                            (flags & InputConnectionCompat.INPUT_CONTENT_GRANT_READ_URI_PERMISSION) != 0)
+                        info.requestPermission();
+
+                    listener.onInputContent(info.getContentUri());
+                    return true;
+                } catch (Throwable ex) {
+                    Log.w(ex);
+                    return false;
+                }
+            }
+        });
+    }
+
+    void setInputContentListener(IInputContentListener listener) {
+        this.listener = listener;
+    }
+
+    interface IInputContentListener {
+        void onInputContent(Uri uri);
+    }
 }

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -160,7 +160,7 @@ public class FragmentCompose extends FragmentBase {
     private ImageView ivCcBcc;
     private RecyclerView rvAttachment;
     private TextView tvNoInternetAttachments;
-    private EditText etBody;
+    private EditTextCompose etBody;
     private TextView tvNoInternet;
     private TextView tvSignature;
     private TextView tvReference;
@@ -306,6 +306,13 @@ public class FragmentCompose extends FragmentBase {
 
         etBody.setCustomSelectionActionModeCallback(actionCallback);
 
+        etBody.setInputContentListener(new EditTextCompose.IInputContentListener() {
+            @Override
+            public void onInputContent(Uri uri) {
+                handleAddAttachment(uri, true);
+            }
+        });
+
         ibReferenceEdit.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {