Added selecting widget background color

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

@@ -21,8 +21,10 @@ package eu.faircode.email;
 
 import android.appwidget.AppWidgetManager;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.graphics.Color;
 import android.os.Bundle;
 import android.view.View;
 import android.view.ViewGroup;
@@ -30,6 +32,7 @@ import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.CheckBox;
+import android.widget.CompoundButton;
 import android.widget.Spinner;
 import android.widget.TextView;
 
@@ -38,6 +41,10 @@ import androidx.annotation.Nullable;
 import androidx.constraintlayout.widget.Group;
 import androidx.preference.PreferenceManager;
 
+import com.flask.colorpicker.ColorPickerView;
+import com.flask.colorpicker.builder.ColorPickerClickListener;
+import com.flask.colorpicker.builder.ColorPickerDialogBuilder;
+
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -50,12 +57,14 @@ public class ActivityWidgetUnified extends ActivityBase {
     private CheckBox cbUnseen;
     private CheckBox cbFlagged;
     private CheckBox cbSemiTransparent;
+    private Button btnColor;
     private Spinner spFontSize;
     private Spinner spPadding;
     private Button btnSave;
     private ContentLoadingProgressBar pbWait;
     private Group grpReady;
 
+    private int background = Color.TRANSPARENT;
     private ArrayAdapter<EntityAccount> adapterAccount;
     private ArrayAdapter<TupleFolderEx> adapterFolder;
     private ArrayAdapter<String> adapterFontSize;
@@ -71,6 +80,9 @@ public class ActivityWidgetUnified extends ActivityBase {
             return;
         }
 
+        if (savedInstanceState != null)
+            background = savedInstanceState.getInt("fair:color");
+
         appWidgetId = extras.getInt(
                 AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
 
@@ -82,6 +94,7 @@ public class ActivityWidgetUnified extends ActivityBase {
         cbUnseen = findViewById(R.id.cbUnseen);
         cbFlagged = findViewById(R.id.cbFlagged);
         cbSemiTransparent = findViewById(R.id.cbSemiTransparent);
+        btnColor = findViewById(R.id.btnColor);
         spFontSize = findViewById(R.id.spFontSize);
         spPadding = findViewById(R.id.spPadding);
         btnSave = findViewById(R.id.btnSave);
@@ -91,6 +104,40 @@ public class ActivityWidgetUnified extends ActivityBase {
         final Intent resultValue = new Intent();
         resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
 
+        cbSemiTransparent.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                btnColor.setEnabled(!isChecked);
+            }
+        });
+
+        btnColor.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                ColorPickerDialogBuilder
+                        .with(ActivityWidgetUnified.this)
+                        .setTitle(R.string.title_widget_background)
+                        .showColorEdit(true)
+                        .wheelType(ColorPickerView.WHEEL_TYPE.FLOWER)
+                        .density(6)
+                        .lightnessSliderOnly()
+                        .setPositiveButton(android.R.string.ok, new ColorPickerClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int selectedColor, Integer[] allColors) {
+                                background = selectedColor;
+                            }
+                        })
+                        .setNegativeButton(R.string.title_reset, new DialogInterface.OnClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                                background = Color.TRANSPARENT;
+                            }
+                        })
+                        .build()
+                        .show();
+            }
+        });
+
         btnSave.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
@@ -114,6 +161,7 @@ public class ActivityWidgetUnified extends ActivityBase {
                 editor.putBoolean("widget." + appWidgetId + ".unseen", cbUnseen.isChecked());
                 editor.putBoolean("widget." + appWidgetId + ".flagged", cbFlagged.isChecked());
                 editor.putBoolean("widget." + appWidgetId + ".semi", cbSemiTransparent.isChecked());
+                editor.putInt("widget." + appWidgetId + ".background", background);
                 editor.putInt("widget." + appWidgetId + ".font", spFontSize.getSelectedItemPosition());
                 editor.putInt("widget." + appWidgetId + ".padding", spPadding.getSelectedItemPosition());
 
@@ -216,6 +264,7 @@ public class ActivityWidgetUnified extends ActivityBase {
         adapterPadding.setDropDownViewResource(R.layout.spinner_item1_dropdown);
         spPadding.setAdapter(adapterPadding);
 
+        btnColor.setEnabled(!cbSemiTransparent.isChecked());
         grpReady.setVisibility(View.GONE);
         pbWait.setVisibility(View.VISIBLE);
 
@@ -252,4 +301,10 @@ public class ActivityWidgetUnified extends ActivityBase {
             }
         }.execute(this, new Bundle(), "widget:accounts");
     }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        outState.putInt("fair:color", background);
+        super.onSaveInstanceState(outState);
+    }
 }