android onSaveInstanceState的使用方法

来源:互联网 发布:linux 查看gcc版本 编辑:程序博客网 时间:2024/05/17 23:45
 

ackage com.saveInstanceDemo.src;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

public class saveInstanceDemo extends Activity {
   
   
    private static final String TAG = "MyNewLog";
    private int mCount = 0;
    private boolean mThreadDisble;
   

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        // If an instance of this activity had previously stopped, we can
        // get the original text it started with.
        if(null != savedInstanceState)
        {
            int IntTest = savedInstanceState.getInt("IntTest");
            String StrTest = savedInstanceState.getString("StrTest");
            Log.e(TAG, "onCreate get thesavedInstanceState+IntTest="+IntTest+"+StrTest="+StrTest);        
        }
        setContentView(R.layout.main);
       
        new Thread(new Runnable()
  {
   @Override
   public void run() {
    // TODO Auto-generated method stub
    
    while(true)
    {
     if(!mThreadDisble)
     {
      Log.v(TAG, Boolean.toString(mThreadDisble));
      try{
       Thread.sleep(1000);
      }
      catch(Exception e)
      {
       e.printStackTrace();
      }
      mCount++;
      Log.v(TAG, "mCount : " + mCount);
     }
        
   }
  }).start();
  
        Log.e(TAG, "onCreate");
    }

    @Override
    //为了防止万一程序被销毁的风险,这个方法可以保证重要数据的正确性
    //不写这个方法并不意味着一定出错,但是一旦遇到了一些非常奇怪的数据问题的时候
    //可以看看是不是由于某些重要的数据没有保存,在程序被销毁时被重置
    public void onSaveInstanceState(Bundle savedInstanceState) {
        // Save away the original text, so we still have it if the activity
        // needs to be killed while paused.
      savedInstanceState.putInt("IntTest", mCount);
      savedInstanceState.putString("StrTest", "savedInstanceState test");
      super.onSaveInstanceState(savedInstanceState);
      Log.e(TAG, "onSaveInstanceState");
      

    @Override
    public void onRestoreInstanceState(Bundle savedInstanceState) {
      super.onRestoreInstanceState(savedInstanceState);
      int mCount = savedInstanceState.getInt("IntTest");
      String StrTest = savedInstanceState.getString("StrTest");
      Log.e(TAG, "onRestoreInstanceState+IntTest="+mCount+"+StrTest="+StrTest);
    }
   
 public void onDestroy()
 {
  super.onDestroy();
  this.mThreadDisble = true;
 }
 
 public void onPause()
 {
  Log.v(TAG, "onPause");
  super.onPause();
  mThreadDisble = true;
 }
 
 public void onResume()
 {
  Log.v(TAG, "onResume");
  super.onResume();
  mThreadDisble = false;
 }
}

原创粉丝点击