SharedPreferences保存数据

package com.test;

import java.io.FileWriter;
import java.io.IOException;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener {
	Button stopBut;
	Button clearBut;
	TextView textView;
	CheckBox mCheckBox1, mCheckBox2;
	int bootNumber;
	boolean isCBChecked;
	boolean isReboot = false;
	Context mContext;
	private static final String BOOT_NUMBER = "mBootNumber";
	private static final int SHUT_DOWN = 0;
	private static final int PLAY_VIDEO = 1;
	private static final String TAG = "MainActivity";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mContext = this;

		stopBut = (Button) findViewById(R.id.stopBut);
		clearBut = (Button) findViewById(R.id.clearBut);
		textView = (TextView) findViewById(R.id.mTextView);
		mCheckBox1 = (CheckBox) findViewById(R.id.CheckBox1);
		mCheckBox2 = (CheckBox) findViewById(R.id.CheckBox2);
		stopBut.setOnClickListener(this);
		clearBut.setOnClickListener(this);
		onReboot();
		
		// 启动保存log日志apk
		Intent intent = new Intent();
		intent.setComponent(new ComponentName("com.logcat",	"com.logcat.MainActivity"));
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		startActivity(intent);
		
		//Intent mIntent = new Intent();
		//mIntent = getPackageManager().getLaunchIntentForPackage(packageName);
		//startActivity(mIntent);

		SharedPreferences pres = getSharedPreferences(BOOT_NUMBER,Context.MODE_WORLD_READABLE);
		if (pres != null) {
			bootNumber = pres.getInt("boot_Number", 0);
			isCBChecked = pres.getBoolean("CheckBox_", true);
		}
		Log.i(TAG, "---------onCreate number:" + bootNumber);
		textView.setText("开机次数：" + bootNumber);
		bootNumber++;

		if (isCBChecked) {
			mCheckBox1.setChecked(true);
			mCheckBox2.setChecked(false);
			mHandler.sendEmptyMessageDelayed(SHUT_DOWN, 8000);
			Log.i(TAG, "---------isCBChecked:mCheckBox1" );
		} else {
			mCheckBox1.setChecked(false);
			mCheckBox2.setChecked(true);			
			mHandler.sendEmptyMessageDelayed(PLAY_VIDEO, 4000);
			Log.i(TAG, "---------isCBChecked:mCheckBox2" );
		}

		mCheckBox1
				.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
					@Override
					public void onCheckedChanged(CompoundButton buttonView,
							boolean isChecked) {
						SharedPreferences pres = getSharedPreferences(
								BOOT_NUMBER, Context.MODE_WORLD_READABLE);
						if (isChecked) {
							isCBChecked = true;
							mCheckBox1.setChecked(true);
							mCheckBox2.setChecked(false);
							if (pres != null) {
								SharedPreferences.Editor ed = pres.edit();
								ed.putBoolean("CheckBox_", true);
								ed.commit();
							}
						} else {
							isCBChecked = false;
							SharedPreferences.Editor ed = pres.edit();
							ed.putBoolean("CheckBox_", false);
							ed.commit();
						}
					}
				});

		mCheckBox2
				.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
					@Override
					public void onCheckedChanged(CompoundButton buttonView,
							boolean isChecked) {
						SharedPreferences pres = getSharedPreferences(
								BOOT_NUMBER, Context.MODE_WORLD_READABLE);
						if (isChecked) {
							isCBChecked = false;
							mCheckBox2.setChecked(true);
							mCheckBox1.setChecked(false);
							if (pres != null) {
								SharedPreferences.Editor ed = pres.edit();
								ed.putBoolean("CheckBox_", false);
								ed.commit();
							}
						} else {
							isCBChecked = true;
							SharedPreferences.Editor ed = pres.edit();
							ed.putBoolean("CheckBox_", true);
							ed.commit();

						}
					}
				});
		

	}

		
	
	
	private Handler mHandler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case SHUT_DOWN:
				onShutdown();
				break;
			case PLAY_VIDEO: 
				onPlayVideo();				
				break;
			default:
				break;
			}
		}
	};

	@Override
	public void onClick(View view) {
		if (view == stopBut) {
			Log.i(TAG, "   stop");
			new AlertDialog.Builder(this).setMessage("停止重启设备").setPositiveButton("OK", null).show();
			stop();
			mHandler.removeMessages(SHUT_DOWN);
		} else if (view == clearBut) {
			Log.i(TAG, "  clear");
			SharedPreferences pres = getSharedPreferences(BOOT_NUMBER,Context.MODE_WORLD_READABLE);
			if (pres != null) {
				SharedPreferences.Editor ed = pres.edit();
				ed.putInt("boot_Number", 0);
				ed.commit();
			}
			bootNumber = 0;
			textView.setText("开机次数：" + 0);
		}
	}

	public void onShutdown() {
		SharedPreferences pres = getSharedPreferences(BOOT_NUMBER,Context.MODE_WORLD_READABLE);
		if (pres != null) {
			SharedPreferences.Editor ed = pres.edit();
			ed.putInt("boot_Number", bootNumber);
			ed.commit();
		}
		
		//关机
		PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
		pm.reboot("recovery");

	}
	
	private void onPlayVideo(){	
		mHandler.sendEmptyMessageDelayed(SHUT_DOWN, 90000);
		Intent playVideo = new Intent();
		playVideo.setClass(MainActivity.this, VideoActicity.class);
		startActivity(playVideo);
	}

	private void stop() {
		try {
			FileWriter fw = new FileWriter("/sys/misc/poweron_status");
			fw.write("0x5a");
			fw.close();
			Log.i(TAG, "---------stop");
		} catch (IOException e) {
			e.printStackTrace();
			new AlertDialog.Builder(this).setMessage(e.getMessage())
					.setPositiveButton("OK", null).show();
		}
	}
	
    //修改文件
	private void onReboot() {
		try {
			FileWriter fw = new FileWriter("/sys/misc/poweron_status");
			fw.write("0x87");
			fw.close();
			Log.i(TAG, "---------onReboot");
		} catch (IOException e) {
			e.printStackTrace();
			new AlertDialog.Builder(this).setMessage(e.getMessage())
					.setPositiveButton("OK", null).show();
		}
	}
	
	
	@Override
	protected void onDestroy() {		
		super.onDestroy();
		mHandler.removeMessages(SHUT_DOWN);
		mHandler.removeMessages(PLAY_VIDEO);
	}
}