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

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();
}
}