Android图片处理——压缩、裁剪、圆角、保存

Android图片处理——压缩、裁剪、圆角、保存

项目中用到的关于图片的处理相关方法

将图片存储至SD卡，需判断是否装有SD卡、是否可读写、是否有空间，否则提示出错

public static boolean save_picture(Context ctx, Bitmap bitmap, int quality, String filePath, String filename) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos);
byte[] data = baos.toByteArray();

if (!Common.checkSDStatus(data.length/1024/1024)) {
Toast.makeText(ctx, "您的储存卡有错误", Toast.LENGTH_SHORT).show();
return false;
}

try {
File destDir = new File(filePath);
if (!destDir.exists())
destDir.mkdirs();

String path = filePath + "/" + filename;
File file = new File(path);
if (!file.exists())
file.createNewFile();

FileOutputStream fos = new FileOutputStream(file);
fos.write(data);
fos.close();
} catch (Exception e) {
e.printStackTrace();
return false;
}

return true;
}

获得圆角图片的方法

/**bitmap 需处理的图片
* roundPx 圆角的弧率
*/
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {

Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);

final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);

paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);

return output;
}

图片中绘入GPS和时间等文字

/**
* bitmap 需处理的图片
* datetime 时间
* lat 经度
*  lng 纬度
*/
public static Bitmap getGpsBitmap(Bitmap bitmap, String datetime, String lat, String lng) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
/* 把位图写进画布canvas类 */
Canvas canvas = new Canvas(output);
/* 画布的区域 */
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
/* 喷漆Paint类 */
Paint paint = new Paint();
paint.setAntiAlias(true);//消除锯齿
paint.setColor(Color.RED);//着色
paint.setTextSize(16);//字体大小
canvas.drawText("经度:" + lng, 10, 20, paint);
canvas.drawText("纬度:" + lat, 10, 38, paint);
canvas.drawText("时间:" + datetime, 10, 56, paint);

paint.setXfermode(new PorterDuffXfermode(Mode.DST_ATOP));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}

裁切图片

/**
* originFile 源文件
* TargetFile 目标文件
*  aspect 宽高比例，如果为null，则不限制
* output 输出分辨率
*/
public static Intent startPhotoZoom(File originFile, File TargetFile, int[] aspect, int[] output) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(Uri.fromFile(originFile), IMAGE_UNSPECIFIED);
intent.putExtra("crop", "true");
intent.putExtra("noFaceDetection", true);
intent.putExtra("return-data", false);

if (null != output) {
BitmapFactory.Options op = new BitmapFactory.Options();
op.inJustDecodeBounds = true;
BitmapFactory.decodeFile(originFile.getPath(), op);

int jpgWidth = op.outWidth;
int jpgHeight = op.outHeight;

if (jpgWidth > output[0] && jpgHeight > output[1]) {
intent.putExtra("outputX", output[0]);
intent.putExtra("outputY", output[1]);
}
}

if (null != aspect) {
intent.putExtra("aspectX", aspect[0]);
intent.putExtra("aspectY", aspect[1]);
}

if (!TargetFile.exists())
try {
TargetFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}

intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(TargetFile));
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());

return intent;
}

从相册中选择一张照片之后，获取该照片的绝对路径

/**
* param ctx
* param photoUri
* return
*/
public static String getPickPhotoPath(Context ctx, Uri photoUri) {
Cursor cursor = null;
try {
cursor = ctx.getContentResolver().query(photoUri, null, null, null, null);
cursor.moveToFirst();
String imgPath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));

return imgPath;
} catch (Exception e) {
return "";
} finally {
cursor.close();
}
}

public static File getPickPhotoFile(Context ctx, Uri photoUri) {
String imgPath = getPickPhotoPath(ctx, photoUri);
if (!TextUtils.isEmpty(imgPath))
return new File(imgPath);
else
return null;
}

压缩图片大小，避免图片过大，保持比例不变，宽或高不超过XX个像素

/**
* param newName 新的文件名称
* param filePath 原文件全路径，包含文件名
* param attachPath 处理过后，文件存放的位置
* param String 新的文件全路径
*/
public static String compressPixelPhotos(final Context ctx, final String newName, final String filePath,
final String attachPath) {
BitmapFactory.Options op = new BitmapFactory.Options();
op.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, op);

int jpgWidth = op.outWidth;
int jpgHeight = op.outHeight;

if (jpgWidth > 800 || jpgHeight > 800) {
int wSendRatio = (int) Math.ceil(jpgWidth / 800.0f);
int hSendRatio = (int) Math.ceil(jpgHeight / 800.0f);
if (wSendRatio > 1 && hSendRatio > 1) {
op.inSampleSize = wSendRatio > hSendRatio ? wSendRatio : hSendRatio;
}
op.inJustDecodeBounds = false;
Bitmap b = BitmapFactory.decodeFile(filePath, op);

if (!save_picture(ctx, b, 90, attachPath, newName)) {
Common.copyFileToFile(filePath, attachPath + File.separator + newName);
}

if (b != null && !b.isRecycled())
b.recycle();

} else {
Common.copyFileToFile(filePath, attachPath + File.separator + newName);
}

return attachPath + File.separator + newName;
}

检查图片分辨率大小，是否需要压缩

/**

* param ctx
* param filePath
* return
*/
public static boolean compressPixelPhotosCheck(final Context ctx, final String filePath) {
BitmapFactory.Options op = new BitmapFactory.Options();
op.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, op);

if (op.outWidth > 800 || op.outHeight > 800) {
return true;
} else {
return false;
}
}

将文件转化为Bitmap对象

/**
* param filename 文件名，全路径
* param jpgGetWidth 照片宽
* param jpgGetHeight 照片高
* return
*/
public static Bitmap decodeFile(String filename, int jpgGetWidth, int jpgGetHeight) {
Bitmap b = null;
try {
BitmapFactory.Options op = new BitmapFactory.Options();
op.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filename, op);

int jpgWidth = op.outWidth;
int jpgHeight = op.outHeight;

int wSendRatio = (int) Math.ceil(jpgWidth / Double.valueOf(jpgGetWidth));
int hSendRatio = (int) Math.ceil(jpgHeight / Double.valueOf(jpgGetHeight));
if (wSendRatio > 1 && hSendRatio > 1) {
op.inSampleSize = wSendRatio > hSendRatio ? wSendRatio : hSendRatio;
}
op.inJustDecodeBounds = false;
b = BitmapFactory.decodeFile(filename, op);

} catch (Exception e) {
}
return b;
}

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