安卓——Activity生命周期
- 在xml 设计页面添加标签
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.administrator.app_style.MainActivity"
android:orientation="vertical">
<Button
android:id="@+id/b1"
android:text="click select!"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/b2"
android:text="click Dx!"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
LinearLayout>
2
/**
* Created by Administrator on 2017/1/3.
* 四大组件都需要注册-》跳转
*/
public class One extends AppCompatActivity {
// 顺序
// 正常
//
// On create -> 创建 Activity不可见
// On start -> 推出去 Activity可见
// On resume-> 用于暂停的回调Activity
// On pause -> 暂停 Activity
// On stop -> OnDestory 销毁Activity结束
//↓ ↑ ← →
// Log →.d debug .e exception .i info
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.timcopy);
Log.e("s","onCreate ->");
}
@Override
protected void onStart() {
super.onStart();
Log.e("s","onStart ->");
}
@Override
protected void onResume() {
super.onResume();
Log.e("s","onResume ->");
}
@Override
protected void onPause() {
super.onPause();
Log.e("s","onPause ->");
}
@Override
protected void onStop() {
super.onStop();
Log.e("s","onStop() ->");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.e("s","onDestroy()");
}
<!DOCTYPE html><html lang='zh-cn'>
<head>
<meta charset='UTF-8'>
<meta http-equiv='content - type' content='text/html; charset=UTF-8'>
<metaname='viewport' content='width=device-width,initial-scale=1.0'/>
<title>安卓——Activity生命周期</title></head><body><div><br></div><div><pre style="font-size: 10.5pt; font-family: 宋体;"><pre style="font-family: 宋体; font-size: 10.5pt;"><pre style="font-family: 宋体; font-size: 10.5pt;"><ol><li>在xml 设计页面添加标签</li></ol> <?<span style="font-size: 10.5pt; color: rgb(0, 0, 255); font-weight: bold;">xml version=</span><span style="font-size: 10.5pt; color: rgb(0, 128, 0); font-weight: bold;">"1.0" </span><span style="font-size: 10.5pt; color: rgb(0, 0, 255); font-weight: bold;">encoding=</span><span style="font-size: 10.5pt; color: rgb(0, 128, 0); font-weight: bold;">"utf-8"</span><span style="font-size: 10.5pt; font-style: italic;">?></span><pre style="background-color: rgb(255, 255, 255); font-family: 宋体; font-size: 10.5pt;"><<span style="color:#000080;font-weight:bold;">LinearLayout </span><span style="color:#0000ff;font-weight:bold;">xmlns:</span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">=</span><span style="color:#008000;font-weight:bold;">"http://schemas.android.com/apk/res/android"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#0000ff;font-weight:bold;">xmlns:</span><span style="color:#660e7a;font-weight:bold;">app</span><span style="color:#0000ff;font-weight:bold;">=</span><span style="color:#008000;font-weight:bold;">"http://schemas.android.com/apk/res-auto"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#0000ff;font-weight:bold;">xmlns:</span><span style="color:#660e7a;font-weight:bold;">tools</span><span style="color:#0000ff;font-weight:bold;">=</span><span style="color:#008000;font-weight:bold;">"http://schemas.android.com/tools"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:layout_width=</span><span style="color:#008000;font-weight:bold;">"match_parent"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:layout_height=</span><span style="color:#008000;font-weight:bold;">"match_parent"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">tools</span><span style="color:#0000ff;font-weight:bold;">:context=</span><span style="color:#008000;font-weight:bold;">"com.example.administrator.app_style.MainActivity"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:orientation=</span><span style="color:#008000;font-weight:bold;">"vertical"</span>><br><br> <<span style="color:#000080;font-weight:bold;">Button<br></span><span style="color:#000080;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:id=</span><span style="color:#008000;font-weight:bold;">"@+id/b1"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:text=</span><span style="color:#008000;font-weight:bold;">"click select!"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:layout_width=</span><span style="color:#008000;font-weight:bold;">"match_parent"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:layout_height=</span><span style="color:#008000;font-weight:bold;">"wrap_content" </span>/><br> <<span style="color:#000080;font-weight:bold;">Button<br></span><span style="color:#000080;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:id=</span><span style="color:#008000;font-weight:bold;">"@+id/b2"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:text=</span><span style="color:#008000;font-weight:bold;">"click Dx!"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:layout_width=</span><span style="color:#008000;font-weight:bold;">"match_parent"<br></span><span style="color:#008000;font-weight:bold;"> </span><span style="color:#660e7a;font-weight:bold;">android</span><span style="color:#0000ff;font-weight:bold;">:layout_height=</span><span style="color:#008000;font-weight:bold;">"wrap_content" </span>/><br><br></<span style="color:#000080;font-weight:bold;">LinearLayout</span>><br></pre><hr style="font-size: 10.5pt;"></pre><pre style="font-family: 宋体; font-size: 10.5pt;"> 2</pre><pre style="font-family: 宋体; font-size: 10.5pt;"><pre style="background-color: rgb(255, 255, 255); font-family: 宋体; font-size: 10.5pt;"><br><span style="color:#808080;font-style:italic;">/**<br></span><span style="color:#808080;font-style:italic;"> * Created by Administrator on 2017/1/3.<br></span><span style="color:#808080;font-style:italic;"> * 四大组件都需要注册-》跳转<br></span><span style="color:#808080;font-style:italic;"> */<br></span><span style="color:#808080;font-style:italic;"><br></span><span style="color:#000080;font-weight:bold;">public class </span>One <span style="color:#000080;font-weight:bold;">extends </span>AppCompatActivity {<br><br><span style="color:#808080;font-style:italic;">// 顺序<br></span><span style="color:#808080;font-style:italic;">// 正常<br></span><span style="color:#808080;font-style:italic;">//<br></span><span style="color:#808080;font-style:italic;">// On create -> 创建 Activity不可见<br></span><span style="color:#808080;font-style:italic;">// On start -> 推出去 Activity可见<br></span><span style="color:#808080;font-style:italic;">// On resume-> 用于暂停的回调Activity<br></span><span style="color:#808080;font-style:italic;">// On pause -> 暂停 Activity<br></span><span style="color:#808080;font-style:italic;">// On stop -> OnDestory 销毁Activity结束<br></span><span style="color:#808080;font-style:italic;">//↓ ↑ ← →<br></span><span style="color:#808080;font-style:italic;">// Log →.d debug .e exception .i info<br></span><span style="color:#808080;font-style:italic;"><br></span><span style="color:#808080;font-style:italic;"><br></span><span style="color:#808080;font-style:italic;"> </span><span style="color:#808000;">@Override<br></span><span style="color:#808000;"> </span><span style="color:#000080;font-weight:bold;">protected void </span>onCreate(@Nullable Bundle savedInstanceState) {<br> <span style="color:#000080;font-weight:bold;">super</span>.onCreate(savedInstanceState);<br> setContentView(R.layout.<span style="color:#660e7a;font-weight:bold;font-style:italic;">timcopy</span>);<br> Log.<span style="font-style:italic;">e</span>(<span style="color:#008000;font-weight:bold;">"s"</span>,<span style="color:#008000;font-weight:bold;">"onCreate ->"</span>);<br> }<br><br> <span style="color:#808000;">@Override<br></span><span style="color:#808000;"> </span><span style="color:#000080;font-weight:bold;">protected void </span>onStart() {<br> <span style="color:#000080;font-weight:bold;">super</span>.onStart();<br> Log.<span style="font-style:italic;">e</span>(<span style="color:#008000;font-weight:bold;">"s"</span>,<span style="color:#008000;font-weight:bold;">"onStart ->"</span>);<br> }<br><br> <span style="color:#808000;">@Override<br></span><span style="color:#808000;"> </span><span style="color:#000080;font-weight:bold;">protected void </span>onResume() {<br> <span style="color:#000080;font-weight:bold;">super</span>.onResume();<br> Log.<span style="font-style:italic;">e</span>(<span style="color:#008000;font-weight:bold;">"s"</span>,<span style="color:#008000;font-weight:bold;">"onResume ->"</span>);<br> }<br><br> <span style="color:#808000;">@Override<br></span><span style="color:#808000;"> </span><span style="color:#000080;font-weight:bold;">protected void </span>onPause() {<br> <span style="color:#000080;font-weight:bold;">super</span>.onPause();<br> Log.<span style="font-style:italic;">e</span>(<span style="color:#008000;font-weight:bold;">"s"</span>,<span style="color:#008000;font-weight:bold;">"onPause ->"</span>);<br> }<br><br> <span style="color:#808000;">@Override<br></span><span style="color:#808000;"> </span><span style="color:#000080;font-weight:bold;">protected void </span>onStop() {<br> <span style="color:#000080;font-weight:bold;">super</span>.onStop();<br> Log.<span style="font-style:italic;">e</span>(<span style="color:#008000;font-weight:bold;">"s"</span>,<span style="color:#008000;font-weight:bold;">"onStop() ->"</span>);<br> }<br><br> <span style="color:#808000;">@Override<br></span><span style="color:#808000;"> </span><span style="color:#000080;font-weight:bold;">protected void </span>onDestroy() {<br> <span style="color:#000080;font-weight:bold;">super</span>.onDestroy();<br> Log.<span style="font-style:italic;">e</span>(<span style="color:#008000;font-weight:bold;">"s"</span>,<span style="color:#008000;font-weight:bold;">"onDestroy()"</span>);<br> }</pre></pre><pre style="font-family: 宋体; font-size: 10.5pt;"><hr><pre style="font-family: 宋体; font-size: 10.5pt;"> </pre></pre></pre></pre></div></body></html>
