1、handleOnWindowFocusChanged(boolean hasFocus) 監(jiān)控滑動(dòng)通知條事件。

public static native void handleOnWindowFocusChanged(boolean hasFocus);
    @Override
    public void onWindowFocusChanged(final boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        Log.e("aAAAAAAAAAAAAAA","AAAAAAAAAAAAAAAAA::"+hasFocus);
    }
}

2、android 保存圖片到sd卡

     File file = new File("/sdcard/myImage/");
     file.mkdirs();// 創(chuàng)建文件夾
     String fileName = "/sdcard/myImage/aa.jpg";
     FileOutputStream outStream = new FileOutputStream(fileName);  
      //寫入數(shù)據(jù)  
     outStream.write(b); //b 圖片數(shù)據(jù)流
     outStream.flush();
     //關(guān)閉輸出流  
     outStream.close(); 

3、sd卡讀取圖片

            Bitmap bitmap = null;  
            try  
            {  
                File file = new File("/sdcard/myImage/data.png");  
                Log.e("SSSSSSSS", " "+file.exists());
                if(file.exists())  
                {  
                    bitmap = BitmapFactory.decodeFile("/sdcard/myImage/data.png");  
                    Log.e("AAAAA","AAAAAAAAAAAAAAA");
                }
                else
                {
                    Log.e("AAAAA","BBBBBBBBBBBBBBBB");
                }
            } catch (Exception e)  
            {  
                // TODO: handle exception  
            } 

        bitmap 轉(zhuǎn)byte[]

         public byte[] Bitmap2Bytes(Bitmap bm) {
           Log.e("AAAAA",":SSSSSSSSSSSSS::"+bm);
                  ByteArrayOutputStream baos = new ByteArrayOutputStream();
                  bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
                  Log.e("AAAAA",":::"+ baos.toByteArray().length);
                  return baos.toByteArray();
            }

4、獲取系統(tǒng)時(shí)間

    SimpleDateFormat formatter = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");     
    Date curDate = new Date(System.currentTimeMillis());//獲取當(dāng)前時(shí)間     
    String str  = formatter.format(curDate);   

5、獲取sd卡路徑

public String getSDPath(){
           File sdDir = null;
           boolean sdCardExist = Environment.getExternalStorageState()  
                               .equals(Environment.MEDIA_MOUNTED);   //判斷sd卡是否存在
           if   (sdCardExist)  
           {                              
             sdDir = Environment.getExternalStorageDirectory();//獲取跟目錄
          }  
           return sdDir.toString();
          
    }

6、獲取相冊圖片路徑：

   （1）打開相冊：

   Intent getAlbum = new Intent(Intent.ACTION_GET_CONTENT);  
    getAlbum.setType(IMAGE_TYPE);  
    startActivityForResult(getAlbum, IMAGE_CODE); 

  （2）選擇圖片：

   protected void onActivityResult(int requestCode, int resultCode, Intent data){
        if (resultCode != RESULT_OK) {        //此處的 RESULT_OK 是系統(tǒng)自定義得一個(gè)常量
//            Log.e(TAG,"ActivityResult resultCode error");
            return;
        }
        Bitmap bm = null;
        ContentResolver resolver = getContentResolver();        
        if (requestCode == IMAGE_CODE) {
            try {
                Uri originalUri = data.getData();        //獲得圖片的uri
                bm = MediaStore.Images.Media.getBitmap(resolver, originalUri);        //顯得到bitmap圖片
//    這里開始的第二部分，獲取圖片的路徑：
                String[] proj = {MediaStore.Images.Media.DATA};        
                Cursor cursor = getContentResolver().query(originalUri, proj, null, null, null);
                //按我個(gè)人理解 這個(gè)是獲得用戶選擇的圖片的索引值
                int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);           
                cursor.moveToFirst();
                //最后根據(jù)索引值獲取圖片路徑
                String path = cursor.getString(column_index);
                Log.e("Lostinai",path);
            }catch (IOException e) {

                Log.e("Lostinai",e.toString());

            }
        }
    }