Android横竖屏幕切换生命周期详解

<manifest xmlns:android="http://schemas.android.com/apk/res/android"  package="com.fry.activityLifeCycle_3Screen"  android:versionCode="1"  android:versionName="1.0" >  <uses-sdk    android:minSdkVersion="8"    android:targetSdkVersion="19" />  <application    android:allowBackup="true"    android:icon="@drawable/ic_launcher"    android:label="@string/app_name"    android:theme="@style/AppTheme" >    <activity      android:configChanges="keyboardHidden|orientation|screenSize"      android:name="com.fry.activityLifeCycle_3Screen.MainActivity"      android:label="@string/app_name" >      <intent-filter>        <action android:name="android.intent.action.MAIN" />        <category android:name="android.intent.category.LAUNCHER" />      </intent-filter>    </activity>    <activity android:name="com.fry.activityLifeCycle_3Screen.Activity01" ></activity>    <activity android:name="com.fry.activityLifeCycle_3Screen.Activity02" android:theme="@android:style/Theme.Translucent" ></activity>  </application></manifest><manifest xmlns:android="http://schemas.android.com/apk/res/android"  package="com.fry.activityLifeCycle_3Screen"  android:versionCode="1"  android:versionName="1.0" >  <uses-sdk    android:minSdkVersion="8"    android:targetSdkVersion="19" />  <application    android:allowBackup="true"    android:icon="@drawable/ic_launcher"    android:label="@string/app_name"    android:theme="@style/AppTheme" >    <activity      android:configChanges="keyboardHidden|orientation|screenSize"      android:name="com.fry.activityLifeCycle_3Screen.MainActivity"      android:label="@string/app_name" >      <intent-filter>        <action android:name="android.intent.action.MAIN" />        <category android:name="android.intent.category.LAUNCHER" />      </intent-filter>    </activity>    <activity android:name="com.fry.activityLifeCycle_3Screen.Activity01" ></activity>    <activity android:name="com.fry.activityLifeCycle_3Screen.Activity02" android:theme="@android:style/Theme.Translucent" ></activity>  </application></manifest>

package com.fry.activityLifeCycle_3Screen;import com.fry.activityLifeCycle_3Screen.R;import android.app.Activity;import android.content.Intent;import android.content.res.Configuration;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity implements OnClickListener{  private Button btn_pause;//创建一个button对象  private Button btn_stop;  private Button btn_offLine;  private String tag=MainActivity.class.getSimpleName();    protected void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);//父类操作      setContentView(R.layout.activity_main);//引入名为activity_main的界面      btn_pause=(Button) findViewById(R.id.btn_pause);//找id为btn_pause的button      btn_stop=(Button) findViewById(R.id.btn_stop);//找id为btn_stop的button      btn_offLine=(Button) findViewById(R.id.btn_offLine);      btn_pause.setOnClickListener(this);      btn_stop.setOnClickListener(this);      btn_offLine.setOnClickListener(this);      /*       * activity被创建时执行       */      Log.d(tag, "onCreate");             }   /*   * activity可见时执行   */   @Override  protected void onStart() {    // TODO Auto-generated method stub    super.onStart();    Log.d(tag, "onStart");  }      /*   * activity交互时执行   */  @Override  protected void onResume() {    // TODO Auto-generated method stub    super.onResume();    Log.d(tag, "onResume");  }  /*   * activity重新可见时执行   */  @Override  protected void onRestart() {    // TODO Auto-generated method stub    super.onRestart();    Log.d(tag, "onRestart");    }  /*   * activity暂停时执行   */  @Override  protected void onPause() {    // TODO Auto-generated method stub    super.onPause();    Log.d(tag, "onPause");  }  /*   * activity停止时执行   */  @Override  protected void onStop() {    // TODO Auto-generated method stub    super.onStop();    Log.d(tag, "onStop");  }  /*   * activity销毁时执行   */  @Override  protected void onDestroy() {    // TODO Auto-generated method stub    super.onDestroy();    Log.d(tag, "onDestroy");  }  /*   * activity在配置改变时执行   * 比如横竖屏幕的切换，键盘有无的切换，屏幕大小的改变   */  @Override  public void onConfigurationChanged(Configuration newConfig) {    // TODO Auto-generated method stub    super.onConfigurationChanged(newConfig);    Log.d(tag, "onConfigurationChanged");  }  @Override  public void onClick(View v) {    // TODO Auto-generated method stub    switch (v.getId()) {    case R.id.btn_pause:      Intent intent=new Intent();      intent.setClass(this, Activity02.class);      startActivity(intent);      break;    case R.id.btn_stop:      Intent intent2=new Intent();      intent2.setClass(this, Activity01.class);      startActivity(intent2);      break;    case R.id.btn_offLine://断开状态      finish();    default:      break;    }  }}

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.fry.activityLifeCycle_3Screen" android:versionCode="1" android:versionName="1.0" > <uses-sdk  android:minSdkVersion="8"  android:targetSdkVersion="19" /> <application  android:allowBackup="true"  android:icon="@drawable/ic_launcher"  android:label="@string/app_name"  android:theme="@style/AppTheme" >  <activity   android:screenOrientation="portrait"   android:name="com.fry.activityLifeCycle_3Screen.MainActivity"   android:label="@string/app_name" >   <intent-filter>    <action android:name="android.intent.action.MAIN" />    <category android:name="android.intent.category.LAUNCHER" />   </intent-filter>  </activity>  <activity android:name="com.fry.activityLifeCycle_3Screen.Activity01" ></activity>  <activity android:name="com.fry.activityLifeCycle_3Screen.Activity02" android:theme="@android:style/Theme.Translucent" ></activity> </application></manifest>

package com.fry.activityLifeCycle_3Screen;import com.fry.activityLifeCycle_3Screen.R;import android.app.Activity;import android.content.Intent;import android.content.res.Configuration;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity implements OnClickListener{ private Button btn_pause;//创建一个button对象 private Button btn_stop; private Button btn_offLine; private String tag=MainActivity.class.getSimpleName();   protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);//父类操作   setContentView(R.layout.activity_main);//引入名为activity_main的界面   btn_pause=(Button) findViewById(R.id.btn_pause);//找id为btn_pause的button   btn_stop=(Button) findViewById(R.id.btn_stop);//找id为btn_stop的button   btn_offLine=(Button) findViewById(R.id.btn_offLine);   btn_pause.setOnClickListener(this);   btn_stop.setOnClickListener(this);   btn_offLine.setOnClickListener(this);   /*    * activity被创建时执行    */   Log.d(tag, "onCreate");       }  /*  * activity可见时执行  */  @Override protected void onStart() {  // TODO Auto-generated method stub  super.onStart();  Log.d(tag, "onStart"); }    /*  * activity交互时执行  */ @Override protected void onResume() {  // TODO Auto-generated method stub  super.onResume();  Log.d(tag, "onResume"); } /*  * activity重新可见时执行  */ @Override protected void onRestart() {  // TODO Auto-generated method stub  super.onRestart();  Log.d(tag, "onRestart");  } /*  * activity暂停时执行  */ @Override protected void onPause() {  // TODO Auto-generated method stub  super.onPause();  Log.d(tag, "onPause"); } /*  * activity停止时执行  */ @Override protected void onStop() {  // TODO Auto-generated method stub  super.onStop();  Log.d(tag, "onStop"); } /*  * activity销毁时执行  */ @Override protected void onDestroy() {  // TODO Auto-generated method stub  super.onDestroy();  Log.d(tag, "onDestroy"); } /*  * activity在配置改变时执行  * 比如横竖屏幕的切换，键盘有无的切换，屏幕大小的改变  */ @Override public void onConfigurationChanged(Configuration newConfig) {  // TODO Auto-generated method stub  super.onConfigurationChanged(newConfig);  Log.d(tag, "onConfigurationChanged");  int width=getWindowManager().getDefaultDisplay().getWidth();  int height=getWindowManager().getDefaultDisplay().getHeight();  if(width>height) Log.d(tag, "landscape");  else Log.d(tag, "portrait"); } @Override public void onClick(View v) {  // TODO Auto-generated method stub  switch (v.getId()) {  case R.id.btn_pause:   Intent intent=new Intent();   intent.setClass(this, Activity02.class);   startActivity(intent);   break;  case R.id.btn_stop:   Intent intent2=new Intent();   intent2.setClass(this, Activity01.class);   startActivity(intent2);   break;  case R.id.btn_offLine://断开状态   finish();  default:   break;  } }}

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.fry.activityLifeCycle_3Screen" android:versionCode="1" android:versionName="1.0" > <uses-sdk  android:minSdkVersion="8"  android:targetSdkVersion="19" /> <application  android:allowBackup="true"  android:icon="@drawable/ic_launcher"  android:label="@string/app_name"  android:theme="@style/AppTheme" >  <activity   android:configChanges="keyboardHidden|orientation|screenSize"   android:name="com.fry.activityLifeCycle_3Screen.MainActivity"   android:label="@string/app_name" >   <intent-filter>    <action android:name="android.intent.action.MAIN" />    <category android:name="android.intent.category.LAUNCHER" />   </intent-filter>  </activity>  <activity android:name="com.fry.activityLifeCycle_3Screen.Activity01" ></activity>  <activity android:name="com.fry.activityLifeCycle_3Screen.Activity02" android:theme="@android:style/Theme.Translucent" ></activity> </application></manifest>