四、Androidの携帯電話の画面の向き

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <Button android:id="@+id/btn" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" 
        android:text="        "/>
    <!-- android:hint：             -->
    <EditText android:id="@+id/editText" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" 
        android:cursorVisible="false"
        android:hint="        "/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.ljq.activity"
      android:versionCode="1"
      android:versionName="1.0">
    <!--        ，           
         android:screenOrientation="portrait"
         android:configChanges="orientation"-->
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".OrientationActivity"
                  android:label="@string/app_name"
                  android:screenOrientation="portrait"
                  android:configChanges="orientation">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="7"/>
    <!--          -->
    <uses-permission android:name="android.permission.CHANGE_CONFIGURATION"/>
</manifest>

package com.ljq.activity;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

publicclass OrientationActivity extends Activity {
    private EditText editText=null;
    
    @Override
    publicvoid onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        editText=(EditText)findViewById(R.id.editText);
        Button btn=(Button)findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener(){
            publicvoid onClick(View v) {
                //        requestedOrientation  
if(OrientationActivity.this.getRequestedOrientation()==-1){
                    Toast.makeText(OrientationActivity.this, "         ", Toast.LENGTH_LONG).show();
                }else{
                    //        7    ，    
                    //SCREEN_ORIENTATION_BEHIND：   Activity     Activity     Activity   
                    //SCREEN_ORIENTATION_LANDSCAPE：   (   ) ，          
                    //SCREEN_ORIENTATION_PORTRAIT：    (   ) ，           
                    //SCREEN_ORIENTATION_NOSENSOR：        ——             ，
                    //                     ("unspecified"    )
                    //SCREEN_ORIENTATION_SENSOR：             ，            ，
                    //              ——        
                    //SCREEN_ORIENTATION_UNSPECIFIED：    ，     ， Android           ，
                    //                ，                
                    //SCREEN_ORIENTATION_USER：          
if(OrientationActivity.this.getRequestedOrientation()==ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){
                        OrientationActivity.this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                    }elseif(OrientationActivity.this.getRequestedOrientation()==ActivityInfo.SCREEN_ORIENTATION_PORTRAIT){
                        OrientationActivity.this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                    }
                    
                }
                
            }
        });
    }
    
    /**
     *            
     */
    @Override
    publicvoid onConfigurationChanged(Configuration newConfig) {
        Toast.makeText(this, "           ", Toast.LENGTH_LONG).show();
        int o=getRequestedOrientation();//       
switch (o) {
        case ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE:
            editText.setText("       ：   ");
            break;
        case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT:
            editText.setText("       ：   ");
            break;
        }
        //    ，    android.app.SuperNotCalledException: Activity OrientationActivity did not
        //call through to super.onConfigurationChanged()  
super.onConfigurationChanged(newConfig);

    }
}