android實現非同步問題小經驗總結

標籤：bsp   error   hand   方法   public   --   div   runnable   new   

1、如所言，必須在UI線程中調用非同步任務的子類

2、經過碰壁 測試

1--、方法一中 @Override            public void onClick(DialogInterface dialog, int which)            {Thread thread=new Thread(new Runnable() {                @Override                public void run()                {                    uploaddd();                }            });               thread.start();2--、方法二中  private void uploaddd()    {        final Handler handler=new Handler()        {            public void handleMessage(Message msg)            {                if(msg.what==1)                {                    Log.d("DFDFDFDF",ii+"__"+"haode");                              }            }        };        Thread thread =new Thread(new Runnable()        {            @Override            public void run()            {                Log.d("DFDFDFDF",ii+"__");                handler.sendEmptyMessage(1);            }        });        thread.start();    }

上述代碼會掛掉 證明得出 在非UI中 調用的方法繼續開啟線程同時有Handler機制會出現異常（因為Handler是非同步機制）

實驗得出下述代碼不會出現異常

1-- @Override            public void onClick(DialogInterface dialog, int which)            {Thread thread=new Thread(new Runnable() {                @Override                public void run()                {                    uploaddd();                }            });               thread.start();2-- private void uploaddd()    {//        final Handler handler=new Handler()//        {//            public void handleMessage(Message msg)//            {//                if(msg.what==1)//                {//                    Log.d("DFDFDFDF",ii+"__"+"haode");////                    if(AndroidClient._error_uploadScrapImgFile.intern()!="")////                    {////                        Toast.makeText(ActivityScrap.this,AndroidClient._error_uploadScrapImgFile,Toast.LENGTH_SHORT).show();////                    }//                }//            }//        };        Thread thread =new Thread(new Runnable()        {            @Override            public void run()            {                Log.d("DFDFDFDF",ii+"__");                AndroidClient.uploadScrapImgFile(scrapImgDatas,ii+"__");                //handler.sendEmptyMessage(1);            }        });        thread.start();    }

 

android實現非同步問題小經驗總結