一、调用系统的剪切功能:
事件执行:
@Override public void onClick(View v) { if(null == mUri)return; Intent intent = new Intent(); intent.setAction("com.android.camera.action.CROP"); intent.setDataAndType(mUri, "image/*");// mUri是已经选择的图片Uri intent.putExtra("crop", "true"); intent.putExtra("aspectX", 1);// 裁剪框比例 intent.putExtra("aspectY", 1); intent.putExtra("outputX", 150);// 输出图片大小 intent.putExtra("outputY", 150); intent.putExtra("return-data", true); MainActivity.this.startActivityForResult(intent, 200); }});
效果图:
二、在onActivityResult中接受剪切数据:
protected void onActivityResult(int requestCode, int resultCode, Intent data) ....
}else if(200 == requestCode){ if(resultCode == RESULT_OK){ // 拿到剪切数据 Bitmap bmap = data.getParcelableExtra("data"); // 显示剪切的图像 ImageView imageview = (ImageView)this.findViewById(R.id.imageview); imageview.setImageBitmap(bmap); // 图像保存到文件中 FileOutputStream foutput = null; try { foutput = new FileOutputStream(this.imageFile); bmap.compress(Bitmap.CompressFormat.PNG, 100, foutput); } catch (FileNotFoundException e) { e.printStackTrace(); }finally{ if(null != foutput){ try { foutput.close(); } catch (IOException e) { e.printStackTrace(); } } } }
效果图: