Number Picker!

app/src/main/java/info/nerull7/mysqlbrowser/NumberPickerDialog.java

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+package info.nerull7.mysqlbrowser;
+
+/**
+ * Created by nerull7 on 18.07.14.
+ */
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.NumberPicker;
+
+/**
+ * A dialog that prompts the user for the message deletion limits.
+ */
+public class NumberPickerDialog extends AlertDialog implements DialogInterface.OnClickListener {
+    private static final String NUMBER = "number";
+
+    /**
+     * The callback interface used to indicate the user is done filling in
+     * the time (they clicked on the 'Set' button).
+     */
+    public interface OnNumberSetListener {
+
+        /**
+         * @param number The number that was set.
+         */
+        void onNumberSet(int number);
+    }
+
+    private final NumberPicker mNumberPicker;
+    private final OnNumberSetListener mCallback;
+
+    /**
+     * @param context Parent.
+     * @param callBack How parent is notified.
+     * @param number The initial number.
+     */
+    public NumberPickerDialog(Context context,
+                              OnNumberSetListener callBack,
+                              int number,
+                              int rangeMin,
+                              int rangeMax,
+                              int title) {
+        this(context, AlertDialog.THEME_HOLO_LIGHT, callBack, number, rangeMin, rangeMax, title);
+    }
+
+    /**
+     * @param context Parent.
+     * @param theme the theme to apply to this dialog
+     * @param callBack How parent is notified.
+     * @param number The initial number.
+     */
+    public NumberPickerDialog(Context context,
+                              int theme,
+                              OnNumberSetListener callBack,
+                              int number,
+                              int rangeMin,
+                              int rangeMax,
+                              int title) {
+        super(context, theme);
+        mCallback = callBack;
+
+        setTitle(title);
+
+        setButton(DialogInterface.BUTTON_POSITIVE, context.getText(R.string.set), this);
+        setButton(DialogInterface.BUTTON_NEGATIVE, context.getText(R.string.no),
+                (OnClickListener) null);
+
+        LayoutInflater inflater =
+                (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        View view = inflater.inflate(R.layout.number_picker_dialog, null);
+        setView(view);
+        mNumberPicker = (NumberPicker) view.findViewById(R.id.number_picker);
+
+        // initialize state
+        mNumberPicker.setMinValue(rangeMin);
+        mNumberPicker.setMaxValue(rangeMax);
+        mNumberPicker.setValue(number);
+        mNumberPicker.setOnLongPressUpdateInterval(100); // make the repeat rate three times as fast
+        // as normal since the range is so large.
+        mNumberPicker.setWrapSelectorWheel(false);       // don't wrap from min->max
+    }
+
+    public void onClick(DialogInterface dialog, int which) {
+        if (mCallback != null) {
+            mNumberPicker.clearFocus();
+            mCallback.onNumberSet(mNumberPicker.getValue());
+            dialog.dismiss();
+        }
+    }
+
+    @Override
+    public Bundle onSaveInstanceState() {
+        Bundle state = super.onSaveInstanceState();
+        state.putInt(NUMBER, mNumberPicker.getValue());
+        return state;
+    }
+
+    @Override
+    public void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        int number = savedInstanceState.getInt(NUMBER);
+        mNumberPicker.setValue(number);
+    }
+}

app/src/main/res/layout/number_picker_dialog.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2009, Google Inc.
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<!--
+This layout file is used by the AlertDialog when displaying a list of items.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:gravity="center_horizontal"
+    android:layout_width="wrap_content"
+    android:layout_height="match_parent" >
+
+    <TextView
+        android:gravity="center_horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/pref_messages_to_save"
+        android:padding="1dip" />
+
+    <NumberPicker
+        android:id="@+id/number_picker"
+        android:layout_centerInParent="true"
+        android:layout_width="100dip"
+        android:layout_height="match_parent" />
+
+</LinearLayout>