Android realizes photo capture and photo capture _android

On the photo interception and photo album interception, read a lot of information on the Internet, they have collated a more detailed, for people in need of reference

1 photo shoot

The principle is to call the system through the intent camera, photographed in the callback operation, the successful capture of the picture according to the URI call the system's crop page, cropping is also in the callback processing, displayed in the page ImageView.

2 albums Select pictures

The principle is also through the intent to open the picture of the system, the user chooses to complete in the callback according to the picture's URI to call the system's clipping page, ditto.

First, define a few constants

public static final int take_photo = 1; 
public static final int crop_photo = 2; 
public static final int action_choose=3; 
Private Uri Imageuri; Picture path 
private String filename;//Picture name 

And then handle the event in the photo and photo album selection button.

@Override public void OnClick (View v) {switch (V.getid ()) {case R.ID.BT1://Photo Capture Simpledatefor 
        Mat format = new SimpleDateFormat ("Yyyymmddhhmmss"); 
        Date date = new Date (System.currenttimemillis ()); 
        filename = Format.format (date); 
        File path = environment.getexternalstoragepublicdirectory (ENVIRONMENT.DIRECTORY_DCIM); 
        File Outputimage = new file (path, filename + ". jpg"); 
          try {if (outputimage.exists ()) {outputimage.delete (); 
        } outputimage.createnewfile (); 
        catch (IOException e) {e.printstacktrace (); 
        //Convert the file object to a Uri and start the camera program Imageuri = Uri.fromfile (outputimage); Intent Intent = new Intent (mediastore.action_image_capture); Photographic Intent.putextra (Mediastore.extra_output, Imageuri); Specify picture output address Startactivityforresult (intent, Take_photo); 
      Start the photo break; Case R.ID.BT2://album Selection Intent Intent2 = new Intent (Intent.action_pick); 
        Intent2.setdataandtype (MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*"); 
        Startactivityforresult (Intent2,action_choose); 
    Break  } 
  }

The most important execution in a callback

The method called when using Startactivityforresult returns a result 
  @Override 
  protected void onactivityresult (int requestcode, int ResultCode, Intent data) { 
    Super.onactivityresult (Requestcode, ResultCode, data); 
    if (RESULTCODE!=RESULT_OK) { 
      Toast.maketext (this, "canceled", Toast.length_short). Show (); 
      return; 
    } 
    Switch (requestcode) {case 
      Take_photo:  //Photo callback 
        Cropimage (); 
        break; 
      Case Action_choose:  //Select the callback of the photo 
        Imageuri = Data.getdata (); 
        Cropimage (); 
        break; 
      Case Crop_photo:  //The callback Showpic () of the cropped photo 
        ; 
        break; 
      Default: Break 
        ; 
    } 
  

How to crop a picture

/** 
 * Crop picture 
 **/ 
private void Cropimage () { 
  Intent Intent = new Intent ("Com.android.camera.action.CROP") ; Trim 
  Intent.setdataandtype (Imageuri, "image/*"); 
  Intent.putextra ("scale", true); 
  Set wide and high proportions 
  of Intent.putextra ("Aspectx", 1); 
  Intent.putextra ("Aspecty", 1); 
  Set cropped picture width high 
  intent.putextra ("Outputx",); 
  Intent.putextra ("Outputy",); 
  Intent.putextra (Mediastore.extra_output, Imageuri); 
  Toast.maketext (Mainactivity.this, "trim picture", Toast.length_short). Show (); 
  Broadcast Refresh album 
  Intent INTENTBC = new Intent (intent.action_media_scanner_scan_file); 
  Intentbc.setdata (Imageuri); 
  This.sendbroadcast (INTENTBC); 
  Startactivityforresult (Intent, Crop_photo); Set crop parameters to display picture to ImageView 
} 

The process is relatively simple, there may be some judgments where there is no treatment, if there is a wrong place to hope that a master can help improve, thank you ~ ~

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