光环助手V3.1 DEV（20180106-1901）测试汇总(部分未完成)

app/src/main/java/com/gh/common/util/BitmapUtils.java

@@ -9,7 +9,9 @@ import android.graphics.drawable.Drawable;
 import android.media.ExifInterface;
 
 import java.io.BufferedOutputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 
@@ -51,6 +53,50 @@ public class BitmapUtils {
         return true;
     }
 
+    /**
+     * 保存图片
+     *
+     * @param newPath
+     * @param filePath
+     * @return
+     */
+    public static boolean savePicture(String newPath, String filePath, int compressSize) {
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
+
+
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        bitmap.compress(Bitmap.CompressFormat.JPEG, 85, bos);
+        float zoom = (float) Math.sqrt(compressSize / (float) bos.toByteArray().length);
+
+        Matrix matrix = new Matrix();
+        matrix.setScale(zoom, zoom);
+
+        Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
+        bos.reset();
+
+        result.compress(Bitmap.CompressFormat.JPEG, 85, bos);
+
+        while (bos.toByteArray().length > compressSize) {
+            matrix.setScale(0.9f, 0.9f);
+
+            result = Bitmap.createBitmap(result, 0, 0, result.getWidth(), result.getHeight(), matrix, true);
+            bos.reset();
+            result.compress(Bitmap.CompressFormat.JPEG, 85, bos);
+        }
+
+        File file = new File(newPath);
+        try {
+            BufferedOutputStream fbos = new BufferedOutputStream(new FileOutputStream(file));
+            result.compress(Bitmap.CompressFormat.JPEG, 85, fbos);
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+            return false;
+        }
+
+        return true;
+    }
+
     /**
      * 根据文件路径返回bitmap
      *