Java tutorial
//package com.java2s; /* * Copyright (C) 2011 The Android Open Source Project * * 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. */ import android.view.ViewGroup; import android.view.ViewGroup.MarginLayoutParams; import android.widget.FrameLayout; import android.widget.RelativeLayout; public class Main { public static MarginLayoutParams newLayoutParam(ViewGroup placer, int width, int height) { if (placer instanceof FrameLayout) { return new FrameLayout.LayoutParams(width, height); } else if (placer instanceof RelativeLayout) { return new RelativeLayout.LayoutParams(width, height); } else if (placer == null) { throw new NullPointerException("placer is null"); } else { throw new IllegalArgumentException( "placer is neither FrameLayout nor RelativeLayout: " + placer.getClass().getName()); } } }