Android theme功能临时存放

Posted 2021-08-10 蚁人日记

this.getExternalFilesDir(Environment.DIRECTORY_PICTURES).getPath();对应路径

/storage/emulated/0/android/data/com.example.testpplication/files/Pictures

   public void  getScreenWidthAndHeight(Context context){
      this.heightPixels = context.getResources().getDisplayMetrics().heightPixels / 2 + 50;
      this.widthPixels  = context.getResources().getDisplayMetrics().widthPixels  /3 - 10;
   }

public  Bitmap getimage(InputStream bitmapIS) {
   BitmapFactory.Options newOpts = new BitmapFactory.Options();
   newOpts.inJustDecodeBounds = true;
   Bitmap bitmap = BitmapFactory.decodeStream(bitmapIS,null, newOpts);
   final int height = newOpts.outWidth;
   final int width = newOpts.outHeight;
   int inSampleSize = 1;
   if (height > heightPixels || width > widthPixels) {
      final int heightRatio = Math.round((float) height / (float) heightPixels);
      final int widthRatio = Math.round((float) width / (float) widthPixels);
      inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
   }
   newOpts.inSampleSize = inSampleSize;// 设置缩放比例
   newOpts.inJustDecodeBounds = false;
   bitmap = BitmapFactory.decodeStream(bitmapIS,null, newOpts);
   return bitmap;
}

public  Bitmap getBitmap(Bitmap orightBitmap, float prevW, float prevH)
{
   int mWidth=orightBitmap.getWidth();
   int mHeight=orightBitmap.getHeight();
   float scaleW=(float)prevW/mWidth;
   float scaleH=(float)prevH/mHeight;
   Matrix scaleMatrix = new Matrix();
   scaleMatrix.postScale(scaleW, scaleH);
   Bitmap resizeBmp = Bitmap.createBitmap(orightBitmap, 0, 0, mWidth,mHeight, scaleMatrix, true);
   return resizeBmp;
}

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getPath();