调用系统摄像头拍照，保存到本地并显示在Imageview

img=(ImageView)findViewById(R.id.img);
take_picture=(Button)findViewById(R.id.take_picture);
take_picture.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
Intentintent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent,Activity.DEFAULT_KEYS_DIALER);
 }
});
protected void onActivityResult(intrequestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode,resultCode, data);
 if (resultCode == Activity.RESULT_OK) {
StringsdStatus = Environment.getExternalStorageState();
if(!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
return;
}
Bundlebundle = data.getExtras();
Bitmapbitmap = (Bitmap) bundle.get("data");//获取相机返回的数据，并转换为Bitmap图片格式
FileOutputStream b = null;
File file =new File("/sdcard/myImage/");
file.mkdirs();// 创建文件夹，名称为myimage
//照片的命名，目标文件夹下，以当前时间数字串为名称，即可确保每张照片名称不相同。
Stringstr=null;
Datedate=null;
SimpleDateFormat format = newSimpleDateFormat("yyyyMMddHHmmss");//获取当前时间，进一步转化为字符串
date =newDate();
str=format.format(date);
StringfileName = "/sdcard/myImage/"+str+".jpg";
 try {
 b = newFileOutputStream(fileName);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);//把数据写入文件
} catch(FileNotFoundException e) {
e.printStackTrace();
} finally{
try {
b.flush();
b.close();
 } catch(IOException e) {
e.printStackTrace();
 }
 if (data!=null) {
BitmapcameraBitmap = (Bitmap) data.getExtras().get("data");
System.out.println("fdf================="+data.getDataString());
img.setImageBitmap(cameraBitmap);
System.out.println("成功======"+cameraBitmap.getWidth()+cameraBitmap.getHeight());
}
}//finally
}
 }