Java tutorial
/* * Copyright 2017 Vector Creations Ltd * * 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. */ package im.vector.view; import android.content.Context; import android.graphics.drawable.GradientDrawable; import android.support.annotation.IntDef; import android.support.v4.content.ContextCompat; import android.text.TextUtils; import android.util.AttributeSet; import android.view.View; import android.widget.RelativeLayout; import android.widget.TextView; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import im.vector.R; import im.vector.util.RoomUtils; public class UnreadCounterBadgeView extends RelativeLayout { // the background settings public static final int HIGHLIGHTED = 0; public static final int NOTIFIED = 1; public static final int DEFAULT = 2; @IntDef({ HIGHLIGHTED, NOTIFIED, DEFAULT }) @Retention(RetentionPolicy.SOURCE) public @interface Status { } private TextView mCounterTextView; private View mParentView; public UnreadCounterBadgeView(Context context) { super(context); init(); } public UnreadCounterBadgeView(Context context, AttributeSet attrs) { super(context, attrs); init(); } public UnreadCounterBadgeView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } private void init() { inflate(getContext(), R.layout.unread_counter_badge, this); mCounterTextView = findViewById(R.id.unread_counter_badge_text_view); mParentView = findViewById(R.id.unread_counter_badge_layout); } /** * Update the badge value and its status * * @param value the new value * @param status the new status */ public void updateCounter(int value, @Status int status) { updateText(RoomUtils.formatUnreadMessagesCounter(value), status); } /** * Update the badge value and its status * * @param text the new text value * @param status the new status */ public void updateText(String text, @Status int status) { if (!TextUtils.isEmpty(text)) { mCounterTextView.setText(text); setVisibility(View.VISIBLE); GradientDrawable shape = new GradientDrawable(); shape.setShape(GradientDrawable.RECTANGLE); shape.setCornerRadius(100); if (status == HIGHLIGHTED) { shape.setColor(ContextCompat.getColor(getContext(), R.color.vector_fuchsia_color)); } else if (status == NOTIFIED) { shape.setColor(ContextCompat.getColor(getContext(), R.color.vector_green_color)); } else { //if (status == DEFAULT) shape.setColor(ContextCompat.getColor(getContext(), R.color.vector_silver_color)); } mParentView.setBackground(shape); } else { setVisibility(View.GONE); } } }