如何鎖定屏幕方向, setRequestedOrientation

我們可以調用 getResources().getConfiguration().orientation 獲得當前的屏幕方向, 然後調用 setRequestedOrientation() 方法鎖定屏幕方向.

例子:

package com.AndroidFixOrientation;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.os.Bundle;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class AndroidFixOrientationActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        CheckBox fixOrientation = (CheckBox)findViewById(R.id.FixOrientation);
        
        fixOrientation.setOnCheckedChangeListener(new OnCheckedChangeListener(){

         int currentOrientation = getResources().getConfiguration().orientation;
         
   public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
    // TODO Auto-generated method stub
    if(arg1){
     switch(currentOrientation) {
      case Configuration.ORIENTATION_LANDSCAPE:
       setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
       break; 
      case Configuration.ORIENTATION_PORTRAIT:
       setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
       break;
      default:
       setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);  
     }
    }else{
     setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
    }
   }});
        

    }
}