【高手来】android图片压缩有关问题出现了溢出
【高手来】android图片压缩问题出现了溢出
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
ContentResolver resolver = getContentResolver();
/**
* 因为两种方式都用到了startActivityForResult方法,
* 这个方法执行完后都会执行onActivityResult方法, 所以为了区别到底选择了那个方式获取图片要进行判断,
* 这里的requestCode跟startActivityForResult里面第二个参数对应
*/
if (requestCode == 0) {//调用系统相册
try {
Uri originalUri = data.getData();//取数据
mContent = readStream(resolver.openInputStream(Uri.parse(originalUri.toString())));// 将图片内容解析成字节数组
myBitmap = getPicFromByTes(mContent, null);// 将字节数组转换为ImageView可调用的Bitmap对象
myBitmap = Bitmap.createScaledBitmap(myBitmap, 120, 110, true);//强制图片大小
contactAvatar.setImageBitmap(myBitmap);//绑定
// originalUri=getContentResolver().insert(TB_CONTACT, values);
} catch (Exception e) {
System.out.print(e.getMessage());
}
} else if (requestCode == REQUEST_CAMERA) {//调用系统相机
try {
Log.v("AddContactActivity", "REQUEST_CAMERA=");
super.onActivityResult(requestCode, resultCode, data);
Bundle extras = data.getExtras();
myBitmap = (Bitmap) extras.get("data");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
myBitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
myBitmap = Bitmap.createScaledBitmap(myBitmap, 120, 110, true);
Log.v("AddContactActivity", "REQUEST_CAMERl=");
mContent = baos.toByteArray();
} catch (Exception e) {
e.printStackTrace();
}
contactAvatar.setImageBitmap(myBitmap);
}
}
//相机调用的方法getPicFromByTes,将字节数组转换为ImageView可调用的Bitmap对象
private Bitmap getPicFromByTes(byte[] bytes, BitmapFactory.Options opts) {
if (bytes != null)
if (opts != null)
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, opts);
else
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
return null;
}
//相机调用readStream,将图片内容解析成字节数组
private byte[] readStream(InputStream openInputStream) throws Exception {
byte[] buffer = new byte[1024];
int len = -1;
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
while ((len = openInputStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();
outStream.close();
openInputStream.close();
return data;
// TODO Auto-generated method stub
}
我现在的问题是 如何把大图压缩很小 因为现在大图出现了溢出。一张图片插到数据库后 显示出来有1M这么大
两个方法中getPicFromByTes,readStream在那里处理图片压缩 越小越好。
------解决方案--------------------
private Bitmap getPicFromByTes(byte[] bytes, BitmapFactory.Options opts);方法里面的opts你不要传null啊,你可以看看Options针对bitmap所做的操作,你要做的就是将大图片的内存压缩下。如果图片太大了,肯定会出现bitmap 的out of memery。
------解决方案--------------------
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
ContentResolver resolver = getContentResolver();
/**
* 因为两种方式都用到了startActivityForResult方法,
* 这个方法执行完后都会执行onActivityResult方法, 所以为了区别到底选择了那个方式获取图片要进行判断,
* 这里的requestCode跟startActivityForResult里面第二个参数对应
*/
if (requestCode == 0) {//调用系统相册
try {
Uri originalUri = data.getData();//取数据
mContent = readStream(resolver.openInputStream(Uri.parse(originalUri.toString())));// 将图片内容解析成字节数组
myBitmap = getPicFromByTes(mContent, null);// 将字节数组转换为ImageView可调用的Bitmap对象
myBitmap = Bitmap.createScaledBitmap(myBitmap, 120, 110, true);//强制图片大小
contactAvatar.setImageBitmap(myBitmap);//绑定
// originalUri=getContentResolver().insert(TB_CONTACT, values);
} catch (Exception e) {
System.out.print(e.getMessage());
}
} else if (requestCode == REQUEST_CAMERA) {//调用系统相机
try {
Log.v("AddContactActivity", "REQUEST_CAMERA=");
super.onActivityResult(requestCode, resultCode, data);
Bundle extras = data.getExtras();
myBitmap = (Bitmap) extras.get("data");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
myBitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
myBitmap = Bitmap.createScaledBitmap(myBitmap, 120, 110, true);
Log.v("AddContactActivity", "REQUEST_CAMERl=");
mContent = baos.toByteArray();
} catch (Exception e) {
e.printStackTrace();
}
contactAvatar.setImageBitmap(myBitmap);
}
}
//相机调用的方法getPicFromByTes,将字节数组转换为ImageView可调用的Bitmap对象
private Bitmap getPicFromByTes(byte[] bytes, BitmapFactory.Options opts) {
if (bytes != null)
if (opts != null)
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, opts);
else
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
return null;
}
//相机调用readStream,将图片内容解析成字节数组
private byte[] readStream(InputStream openInputStream) throws Exception {
byte[] buffer = new byte[1024];
int len = -1;
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
while ((len = openInputStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();
outStream.close();
openInputStream.close();
return data;
// TODO Auto-generated method stub
}
我现在的问题是 如何把大图压缩很小 因为现在大图出现了溢出。一张图片插到数据库后 显示出来有1M这么大
两个方法中getPicFromByTes,readStream在那里处理图片压缩 越小越好。
------解决方案--------------------
private Bitmap getPicFromByTes(byte[] bytes, BitmapFactory.Options opts);方法里面的opts你不要传null啊,你可以看看Options针对bitmap所做的操作,你要做的就是将大图片的内存压缩下。如果图片太大了,肯定会出现bitmap 的out of memery。
------解决方案--------------------