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标题:
Android 应用程序多Activity跳转之后退出整个程序
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作者:
cu_Cbear
时间:
2011-12-13 22:47
标题:
Android 应用程序多Activity跳转之后退出整个程序
Android 应用程序多Activity跳转之后退出整个程序
在应用中肯定遇到有这样的问题,在应用中在于多的Activity中跳转,这些Activity都存在Activity栈中了。所以按返回键的时候都是一个一个的将原来的Activity弹回。如果我们想捕获到back事件之后直接退出整个程序,就要思考了。特别是2.2之后的安全机制考虑之后。
粘贴点代码,以备之后使用。
Java代码
1.package com.jftt;
2.
3.import android.app.Activity;
4.import android.app.ActivityManager;
5.import android.app.AlertDialog;
6.import android.content.Context;
7.import android.content.DialogInterface;
8.import android.content.Intent;
9.import android.os.Bundle;
10.import android.util.Log;
11.import android.view.KeyEvent;
12.import android.view.View;
13.import android.view.View.OnClickListener;
14.import android.widget.Button;
15.
16.public class TestLogout extends Activity {
17. public static final String TAG = TestLogout.class.getSimpleName();
18. private Button btn1;
19. private Button btn2;
20. private Button btn3;
21. private Button btn4;
22. private Button btn5;
23. private Button go;
24.
25. @Override
26. protected void onCreate(Bundle savedInstanceState) {
27. super.onCreate(savedInstanceState);
28. setContentView(R.layout.logout);
29. this.onStart();
30.
31. btn1 = (Button) findViewById(R.id.btn1);
32. btn1.setOnClickListener(new OnClickListener() {
33. @Override
34. public void onClick(View v) {
35. android.os.Process.killProcess(android.os.Process.myPid()); // 获取PID
36. }
37. });
38.
39. btn2 = (Button) findViewById(R.id.btn2);
40. btn2.setOnClickListener(new OnClickListener() {
41. @Override
42. public void onClick(View v) {
43. System.exit(0); // 常规java、c#的标准退出法,返回值为0代表正常退出
44. }
45. });
46.
47. btn3 = (Button) findViewById(R.id.btn3);
48. btn3.setOnClickListener(new OnClickListener() {
49. @Override
50. public void onClick(View v) {
51. Log.i(TAG, "close " + getPackageName());
52. ActivityManager am = (ActivityManager) TestLogout.this .getSystemService(Context.ACTIVITY_SERVICE);
53. am.restartPackage(getPackageName());
54. // am.killBackgroundProcesses(getPackageName());
55. }
56. });
57.
58. btn4 = (Button) findViewById(R.id.btn4);
59. btn4.setOnClickListener(new OnClickListener() {
60. @Override
61. public void onClick(View v) {
62. Intent intent = new Intent();
63. // intent.setClass((B或者C或者D).this, A.class);
64. intent.setClass(TestLogout.this, TestLogout.class);
65. intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
66. intent.putExtra("flag", 1);
67. startActivity(intent);
68. }
69. });
70.
71. //此方法并未杀掉应用程序 而是把launcher调起
72. btn5 = (Button) findViewById(R.id.btn5);
73. btn5.setOnClickListener(new OnClickListener() {
74. @Override
75. public void onClick(View v) {
76. Intent startMain = new Intent(Intent.ACTION_MAIN);
77. startMain.addCategory(Intent.CATEGORY_HOME);
78. startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
79. startActivity(startMain);
80. }
81. });
82.
83. go = (Button) findViewById(R.id.go);
84. go.setOnClickListener(new OnClickListener() {
85. @Override
86. public void onClick(View v) {
87. Intent intent = new Intent(TestLogout.this, TestLogout.class);
88. // intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
89. startActivity(intent);
90. }
91. });
92.
93. }
94.
95. protected void onStart() {
96. super.onStart();
97. Intent intent = getIntent();
98. int x = intent.getIntExtra("flag", -1);
99. if (x == 0) {
100. finish();
101. }
102. }
103.
104. @Override
105. public boolean onKeyDown(int keyCode, KeyEvent event) {
106. if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
107. AlertDialog.Builder alertbBuilder = new AlertDialog.Builder(this);
108. alertbBuilder.setIcon(R.drawable.icon).setTitle("友情提示...").setMessage("你确定要离开吗?");
109. alertbBuilder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
110. @Override
111. public void onClick(DialogInterface dialog, int which) {
112. // 结束这个Activity
113. int nPid = android.os.Process.myPid();
114. android.os.Process.killProcess(nPid);
115. }
116. });
117. alertbBuilder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
118. @Override
119. public void onClick(DialogInterface dialog, int which) {
120. dialog.cancel();
121. }
122. }).create();
123. alertbBuilder.show();
124. }
125. return true;
126. }
127.}
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Java代码
1.package com.jftt;
2.
3.import java.util.Stack;
4.
5.import android.app.Activity;
6.
7.public class ActiivtyStack {
8. private static Stack<Activity> mActivityStack;
9. private static ActiivtyStack instance;
10.
11. private ActiivtyStack() {
12. }
13. public static ActiivtyStack getScreenManager() {
14. if (instance == null) {
15. instance = new ActiivtyStack();
16. }
17. return instance;
18. }
19.
20. // 退出栈顶Activity
21. public void popActivity(Activity activity) {
22. if (activity != null) {
23. activity.finish();
24. mActivityStack.remove(activity);
25. // mActivityStack.pop();
26. activity = null;
27. }
28. }
29.
30. // 获得当前栈顶Activity
31. public Activity currentActivity() {
32. Activity activity = mActivityStack.lastElement();
33. // Activity activity = mActivityStack.pop();
34. return activity;
35. }
36.
37. // 将当前Activity推入栈中
38. public void pushActivity(Activity activity) {
39. if (mActivityStack == null) {
40. mActivityStack = new Stack<Activity>();
41. }
42. mActivityStack.add(activity);
43. // mActivityStack.push(activity);
44. }
45.
46. // 退出栈中所有Activity
47. public void popAllActivityExceptOne(Class<Activity> cls) {
48. while (true) {
49. Activity activity = currentActivity();
50. if (activity == null) {
51. break;
52. }
53. if (activity.getClass().equals(cls)) {
54. break;
55. }
56. popActivity(activity);
57. }
58. }
59.
60.}
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logout.xml
Xml代码
1.<?xml version="1.0" encoding="utf-8"?>
2.<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. >
7. <Button
8. android:id="@+id/btn1"
9. android:layout_width="fill_parent"
10. android:layout_height="wrap_content"
11. android:text="logout button1"
12. />
13. <Button
14. android:id="@+id/btn2"
15. android:layout_width="fill_parent"
16. android:layout_height="wrap_content"
17. android:text="logout button2"
18. />
19. <Button
20. android:id="@+id/btn3"
21. android:layout_width="fill_parent"
22. android:layout_height="wrap_content"
23. android:text="logout button3"
24. />
25. <Button
26. android:id="@+id/btn4"
27. android:layout_width="fill_parent"
28. android:layout_height="wrap_content"
29. android:text="go to first"
30. />
31. <Button
32. android:id="@+id/btn5"
33. android:layout_width="fill_parent"
34. android:layout_height="wrap_content"
35. android:text="go to launcher"
36. />
37. <Button
38. android:id="@+id/go"
39.
40. android:layout_width="fill_parent"
41. android:layout_height="wrap_content"
42. android:text="go another activity"
43. />
44. <!--
45. <EditText
46. android:id="@+id/et01"
47. android:layout_width="fill_parent"
48. android:layout_height="fill_parent"
49. />
50. <ImageView
51. android:id="@+id/iv01"
52. android:layout_width="wrap_content"
53. android:layout_height="wrap_content"
54. />
55. -->
56.</LinearLayout>
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manifest中的权限:
Xml代码
1.<uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" />
2.<uses-permission android:name="android.permission.RESTART_PACKAGE" />
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作者:
芯忻相依
时间:
2011-12-20 16:47
学习啦 谢谢楼主
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