The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...
/* * Copyright (C) 2007 The Android开源工程 * * 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 com.example.android.apis.app; import com.example.android.apis.R; import android.app.Activity; import android.widget.Button; import android.os.Bundle; import android.view.View; import android.widget.Toast; /** * When you push the button on this Activity, it creates a {@link Toast} object and * using the Toast method. * @see Toast * @see Toast#makeText(android.content.Context,int,int) * @see Toast#makeText(android.content.Context,java.lang.CharSequence,int) * @see Toast#LENGTH_SHORT * @see Toast#LENGTH_LONG */ public class NotifyWithText extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.notify_with_text); Button button; // short notification button = (Button) findViewById(R.id.short_notify); button.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { // Note that we create the Toast object and call the show() method // on it all on one line. Most uses look like this, but there // are other methods on Toast that you can call to configure how // it appears. // // Note also that we use the version of makeText that takes a // resource id (R.string.short_notification_text). There is also // a version that takes a CharSequence if you must construct // the text yourself. Toast.makeText(NotifyWithText.this, R.string.short_notification_text, Toast.LENGTH_SHORT).show(); } }); // long notification // The only difference here is that the notification stays up longer. // You might want to use this if there is more text that they're going // to read. button = (Button) findViewById(R.id.long_notify); button.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { Toast.makeText(NotifyWithText.this, R.string.long_notification_text, Toast.LENGTH_LONG).show(); } }); } }