| /* |
| * Copyright (C) 2007 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. |
| */ |
| |
| package com.example.android.apis.app; |
| |
| // Need the following import to get access to the app resources, since this |
| // class is in a sub-package. |
| import com.example.android.apis.R; |
| |
| import android.app.Activity; |
| import android.content.Intent; |
| import android.os.Bundle; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.widget.Button; |
| |
| |
| /** |
| * <p>Example of removing yourself from the history stack after forwarding to |
| * another activity. This can be useful, for example, to implement |
| a confirmation dialog before the user goes on to another activity -- once the |
| user has confirmed this operation, they should not see the dialog again if they |
| go back from it.</p> |
| |
| <p>Note that another way to implement a confirmation dialog would be as |
| an activity that returns a result to its caller. Either approach can be |
| useful depending on how it makes sense to structure the application.</p> |
| |
| <h4>Demo</h4> |
| App/Activity/Receive Result |
| |
| <h4>Source files</h4> |
| <table class="LinkTable"> |
| <tr> |
| <td class="LinkColumn">src/com.example.android.apis/app/Forwarding.java</td> |
| <td class="DescrColumn">Forwards the user to another activity when its button is pressed</td> |
| </tr> |
| <tr> |
| <td class="LinkColumn">/res/any/layout/forwarding.xml</td> |
| <td class="DescrColumn">Defines contents of the Forwarding screen</td> |
| </tr> |
| </table> |
| */ |
| public class Forwarding extends Activity |
| { |
| @Override |
| protected void onCreate(Bundle savedInstanceState) |
| { |
| super.onCreate(savedInstanceState); |
| |
| setContentView(R.layout.forwarding); |
| |
| // Watch for button clicks. |
| Button goButton = (Button)findViewById(R.id.go); |
| goButton.setOnClickListener(mGoListener); |
| } |
| |
| private OnClickListener mGoListener = new OnClickListener() |
| { |
| public void onClick(View v) |
| { |
| // Here we start the next activity, and then call finish() |
| // so that our own will stop running and be removed from the |
| // history stack. |
| Intent intent = new Intent(); |
| intent.setClass(Forwarding.this, ForwardTarget.class); |
| startActivity(intent); |
| finish(); |
| } |
| }; |
| } |
| |