之前有看视频了解手机页面的切换用2个Activity进行切换，今天看了下书，采用的Flayout进行切换，特做笔记。

小心得：主要利用setContentView(R.layout.activity_main2)切换Layout。代码如下。

1 package com.example.test02; 2  3 import android.os.Bundle; 4 import android.app.Activity; 5 import android.view.Menu; 6 import android.view.View; 7 import android.widget.Button; 8  9 public class MainActivity extends Activity {10     Button b1 =null;11     Button b2 =null;12     @Override13     public void onCreate(Bundle savedInstanceState) {14         super.onCreate(savedInstanceState);15         setContentView(R.layout.activity_main);16         b1 = (Button) findViewById(R.id.button1);17         b1.setOnClickListener( new Button.OnClickListener(){18             19             public void onClick(View v) {20                 switchLayoutOne();21                 22             }23             24         } );25     }26     public void switchLayoutOne (){27         setContentView(R.layout.activity_main2);28         b2 = (Button) findViewById(R.id.button2);29         b2.setOnClickListener( new Button.OnClickListener(){30             public void onClick(View v){31                 switchLayoutTwo();32             }33         });34     }35     public void switchLayoutTwo (){36         setContentView(R.layout.activity_main);37         b1 = (Button) findViewById(R.id.button1);38         b1.setOnClickListener( new Button.OnClickListener(){39             public void onClick(View v){40                 switchLayoutOne();41             }42         });43     }44     @Override45     public boolean onCreateOptionsMenu(Menu menu) {46         getMenuInflater().inflate(R.menu.activity_main, menu);47         return true;48     }49 }