Android实现动态切换横竖屏，保存横竖屏数据（用Preference存储）

Look My Code:

package com.test;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;
import android.widget.Toast;

/**
 * class name：TestAndroid_BasicActivity<BR>
 * class description：动态设置横竖屏哦<BR>
 * PS：既然要实现横竖屏的变更，所以设置的记录就必须持久化存储 你可以用数据库，这里用的是简单一点的Preference <BR>
 * 
 * @version 1.00 2011/09/21
 * @author CODYY)peijiangping
 */
public class TestAndroid_BasicActivity extends Activity implements
		OnLongClickListener {
	// 设置默认为横屏SCREEN_ORIENTATION_LANDSCAPE,竖屏SCREEN_ORIENTATION_PORTRAIT
	private int ORIENTATION = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
	private TextView textview;
	private MyPreference mpf;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		mpf = new MyPreference(this, "love");
		try {
			ORIENTATION = mpf.read("model");
		} catch (Exception e) {
			System.out.println("first");
		}
		requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
				WindowManager.LayoutParams.FLAG_FULLSCREEN);// 设置全屏
		// 设置横竖屏
		setRequestedOrientation(ORIENTATION);
		setContentView(R.layout.main);
		init();
	}

	private void init() {
		textview = (TextView) this.findViewById(R.id.textview);
		textview.setText("Loveing");
		textview.setOnLongClickListener(this);// 实现长按事件监听
	}

	@Override
	public boolean onLongClick(View v) {
		// 如果当前为横屏
		if (ORIENTATION == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {
			// 将竖屏保存进MyPreference
			mpf.write("model", ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
			// 显示一个toast提示
			Toast toast = Toast.makeText(this, "横屏已经切换成竖屏，请重新进入应用查看",
					Toast.LENGTH_SHORT);
			toast.show();
			// 如果当前为竖屏
		} else if (ORIENTATION == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {
			// 将横屏保存进MyPreference
			mpf.write("model", ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
			// 显示一个toast提示
			Toast toast = Toast.makeText(this, "竖屏已经切换成横屏，请重新进入应用查看",
					Toast.LENGTH_SHORT);
			toast.show();
		}
		return false;
	}
}

package com.test;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;

public class MyPreference {
	private SharedPreferences preference;
	private String file_name;
	private int value_int;
	//设置默认为横屏
	private int defultint = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;;

	public MyPreference(Context context, String str) {
		file_name = str;
		value_int = 0;
		preference = context.getSharedPreferences(file_name, 0);
	}

	public int read(String name) {
		value_int = preference.getInt(name, defultint);
		return value_int;
	}

	public void write(String name, int value) {
		SharedPreferences.Editor editor = preference.edit();
		editor.putInt(name, value);
		editor.commit();
	}
}