android编程实现系统图片剪裁的方法

本文实例讲述了android编程实现系统图片剪裁的方法。分享给大家供大家参考，具体如下：

package cn.test;
import java.io.file;
import java.text.simpledateformat;
import java.util.date;
import android.app.activity;
import android.content.contentresolver;
import android.content.contenturis;
import android.content.intent;
import android.database.cursor;
import android.graphics.bitmap;
import android.net.uri;
import android.os.bundle;
import android.provider.mediastore;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.imageview;
public class cutactivity extends activity {
 private button button;
 private imageview imageview;
 private file mcurrentphotofile;
 private bitmap camerabitmap;
 @override
 public void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.main);
  button = (button) findviewbyid(r.id.button);
  imageview = (imageview) findviewbyid(r.id.imageview);
  button.setonclicklistener(new onclicklistener() {
   @override
   public void onclick(view v) {
    intent intent = new intent(
    "android.media.action.image_capture");
    mcurrentphotofile = new file(
      "mnt/sdcard/dcim/camera/",
      getphotofilename());
   intent.putextra(mediastore.extra_output, uri.fromfile(mcurrentphotofile));
  startactivityforresult(
    intent,
    activity.default_keys_dialer);
   }
  });
 }
 @override
 protected void onactivityresult(int requestcode, int resultcode, intent data) {
  switch (requestcode) {
  case 1:
   uri imguri = mediastore.images.media.external_content_uri;
   contentresolver cr = cutactivity.this
     .getcontentresolver();
   uri fileuri = uri.fromfile(mcurrentphotofile);
   sendbroadcast(new intent(intent.action_media_scanner_scan_file,
     fileuri));
   try {
    thread.sleep(3000);
   } catch (interruptedexception e) {
    e.printstacktrace();
   }
   cursor cursor = cr
     .query(imguri, null,
       mediastore.images.media.display_name + "='"
         + mcurrentphotofile.getname() + "'",
       null, null);
   uri uri = null;
   if (cursor != null && cursor.getcount() > 0) {
    cursor.movetolast();
    long id = cursor.getlong(0);
    uri = contenturis.withappendedid(imguri, id);
   }
   final intent intent = new intent(
     "com.android.camera.action.crop");
   intent.setdataandtype(uri, "image/*");
   intent.putextra("crop", "true");
   intent.putextra("outputx", 380);
   intent.putextra("outputy", 500);
   intent.putextra("return-data", true);
   cutactivity.this.startactivityforresult(intent, 3);
   break;
  case 2:
   break;
  case 3:
   if (data != null) {
    camerabitmap = (bitmap) data.getextras().get("data");
    imageview.setimagebitmap(camerabitmap);
   }
   break;
  default:
   break;
  }
  super.onactivityresult(requestcode, resultcode, data);
 }
 private string getphotofilename() {
  date date = new date(system.currenttimemillis());
  simpledateformat dateformat = new simpledateformat(
    "'img'_yyyymmdd_hhmmss");
  return dateformat.format(date) + ".jpg";
 }
}

希望本文所述对大家android程序设计有所帮助。