动态更改屏幕方向LANDSCAPE与PORTRAIT 转

动态更改屏幕方向……LANDSCAPE与PORTRAIT

package irdc.ex05_22;

import android.app.Activity;

import android.content.pm.ActivityInfo;

import android.os.Bundle;

import android.view.Display;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class EX05_22 extends Activity

{

private TextView mTextView01;

private Button mButton01;

@Override

public void onCreate(Bundle savedInstanceState)

{

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

  

  mButton01 = (Button)findViewById(R.id.myButton1); 

  mTextView01 = (TextView)findViewById(R.id.myTextView1);

  

  if(getRequestedOrientation()==-1)

  {

    mTextView01.setText(getResources().getText

    (R.string.str_err_1001));

  }

  

  

  mButton01.setOnClickListener(new Button.OnClickListener()

  {

    @Override

    public void onClick(View arg0)

    {

      

      

      

      if(getRequestedOrientation()==-1)

      {

        

        mTextView01.setText(getResources().getText

        (R.string.str_err_1001));

      }

      else

      {

        if(getRequestedOrientation()==

           ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)

        {

          

          setRequestedOrientation

          (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        }

        else if(getRequestedOrientation()==

                ActivityInfo.SCREEN_ORIENTATION_PORTRAIT)

        {

          

          setRequestedOrientation

          (ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

        }

      }

    }      

  });

}

@Override

public void setRequestedOrientation(int requestedOrientation)

{

  // TODO Auto-generated method stub

  

  

  switch(requestedOrientation)

  {

    

    case (ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE):

      mMakeTextToast

      (

        getResources().getText(R.string.str_msg1).toString(),

        false

      );

      break;

    

    case (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT):

      mMakeTextToast

      (

        getResources().getText(R.string.str_msg2).toString(),

        false

      );

      break;

  }

  super.setRequestedOrientation(requestedOrientation);

}

@Override

public int getRequestedOrientation()

{

  // TODO Auto-generated method stub

  

  

  return super.getRequestedOrientation();

}

public void mMakeTextToast(String str, boolean isLong)

{

  if(isLong==true)

  {

    Toast.makeText(EX05_22.this, str, Toast.LENGTH_LONG).show();

  }

  else

  {

    Toast.makeText(EX05_22.this, str, Toast.LENGTH_SHORT).show();

  }

}

}

AndroidMinifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest

xmlns:android="http://schemas.android.com/apk/res/android"

package="irdc.ex05_22"

android:versionCode="1"

android:versionName="1.0.0">

<application

  android:icon="@drawable/icon"

  android:label="@string/app_name">

  <activity

    android:name=".EX05_22"

    android:label="@string/app_name"

    android:screenOrientation="portrait">

    <intent-filter>

      <action android:name="android.intent.action.MAIN" />

      <category android:name="android.intent.category.LAUNCHER" />

    </intent-filter>

  </activity>

</application>

</manifest>