1、handleOnWindowFocusChanged(boolean hasFocus) 监控滑动通知条事件。
public static native void handleOnWindowFocusChanged(boolean hasFocus); @Override public void onWindowFocusChanged(final boolean hasFocus) { super.onWindowFocusChanged(hasFocus); Log.e("aAAAAAAAAAAAAAA","AAAAAAAAAAAAAAAAA::"+hasFocus); } }
2、android 保存图片到sd卡
File file = new File("/sdcard/myImage/"); file.mkdirs();// 创建文件夹 String fileName = "/sdcard/myImage/aa.jpg"; FileOutputStream outStream = new FileOutputStream(fileName); //写入数据 outStream.write(b); //b 图片数据流 outStream.flush(); //关闭输出流 outStream.close();
3、sd卡读取图片
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 转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、获取系统时间
SimpleDateFormat formatter = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss"); Date curDate = new Date(System.currentTimeMillis());//获取当前时间 String str = formatter.format(curDate);
5、获取sd卡路径
public String getSDPath(){ File sdDir = null; boolean sdCardExist = Environment.getExternalStorageState() .equals(Environment.MEDIA_MOUNTED); //判断sd卡是否存在 if (sdCardExist) { sdDir = Environment.getExternalStorageDirectory();//获取跟目录 } return sdDir.toString(); }
6、获取相册图片路径:
(1)打开相册:
Intent getAlbum = new Intent(Intent.ACTION_GET_CONTENT); getAlbum.setType(IMAGE_TYPE); startActivityForResult(getAlbum, IMAGE_CODE);
(2)选择图片:
protected void onActivityResult(int requestCode, int resultCode, Intent data){ if (resultCode != RESULT_OK) { //此处的 RESULT_OK 是系统自定义得一个常量 // Log.e(TAG,"ActivityResult resultCode error"); return; } Bitmap bm = null; ContentResolver resolver = getContentResolver(); if (requestCode == IMAGE_CODE) { try { Uri originalUri = data.getData(); //获得图片的uri bm = MediaStore.Images.Media.getBitmap(resolver, originalUri); //显得到bitmap图片 // 这里开始的第二部分,获取图片的路径: String[] proj = {MediaStore.Images.Media.DATA}; Cursor cursor = getContentResolver().query(originalUri, proj, null, null, null); //按我个人理解 这个是获得用户选择的图片的索引值 int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); //最后根据索引值获取图片路径 String path = cursor.getString(column_index); Log.e("Lostinai",path); }catch (IOException e) {
Log.e("Lostinai",e.toString());
} } }
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