Android Activity生命周期的学习以及Logcat的使用

核心提示：DEBUG/Activity1(313): onResume Activity 1这说明一般Activity的启动顺序是onCreate -> onStart -> onResume2. 点击back返回键后05-08 09:40:04.129: DEBUG/Activity1(313): onPause

DEBUG/Activity1(313): onResume Activity 1

这说明一般Activity的启动顺序是onCreate -> onStart -> onResume

2. 点击back返回键后

05-08 09:40:04.129: DEBUG/Activity1(313): onPause Activity 1 05-08 09:40:04.628: DEBUG/Activity1(313): onStop Activity 1 05-08 09:40:04.659: DEBUG/Activity1(313): onDestory Activity 1

退出当前Activity时，onPause -> onStop -> onDestory

3. 再次启动Activity

05-08 09:40:18.249: DEBUG/Activity1(313): onCreate Activity 1 05-08 09:40:18.249: DEBUG/Activity1(313): onStart Activity 1 05-08 09:40:18.259: DEBUG/Activity1(313): onResume Activity 1

和一般启动的顺序是一样的

4. 从Activity1启动Acitivity2

05-08 09:40:25.477: DEBUG/Activity1(313): onPause Activity 1 05-08 09:40:25.687: DEBUG/Activity2(313): onCreate Activity 2 05-08 09:40:25.687: DEBUG/Activity2(313): onStart Activity 2 05-08 09:40:25.719: DEBUG/Activity2(313): onResume Activity 2 05-08 09:40:26.277: DEBUG/Activity1(313): onStop Activity 1

Activity1.onPause -> Activity2.onCreate -> Activity2.onStart -> Activity2.onResume ->Activity1.onStop

5. 点击Home键回到桌面

05-08 09:40:31.777: DEBUG/Activity2(313): onPause Activity 2 05-08 09:40:32.658: DEBUG/Activity2(313): onStop Activity 2

Activity2.onPause - > Activity2.onStop

6. 回到原来的程序

05-08 09:40:50.429: INFO/ActivityManager(58): Starting activity: Intent ... 05-08 09:40:50.649: DEBUG/Activity2(313): onRestart Activity 2 05-08 09:40:50.649: DEBUG/Activity2(313): onStart Activity 2 05-08 09:40:50.769: DEBUG/Activity2(313): onResume Activity 2

Activity2.onRestart -> Activity2.onStart -> Activity2.onResume

7. 点击comfirm, setResult(RESULT_OK)，Activity2.finish()，返回到Activity1

05-08 09:41:04.928: DEBUG/Activity2(313): onPause Activity 2 05-08 09:41:04.988: DEBUG/Activity1(313): onRestart Activity 1 05-08 09:41:04.998: