android-Call system Contentprivder get a single picture to achieve the cut to do avatar and source download

Recently csdn cannot upload the picture, so cannot give everybody.
First of all, describe the features of this small project :
1, call the system's album app to get a single picture
2. Easy to cut a single picture to make a specific size of the avatar picture
3, to obtain the results of the image analysis, the use of three ways.
See the code below for details:

 Public  class mainactivity extends Activity implements Onclicklistener {    PrivateTextView Backtx,suretx;//A return key, a OK key    PrivateImageView ImageView;//Show ImageView of the acquired picture    PrivateButton Getpic,getpic2cut;//two buttons, respectively, to obtain the picture, to cut the picture    Private Final intREQUEST = One;//Get the request value of the picture    Private Final intHead_image_zoom = A;//Picture cut request Value    PrivateURI Uri;PrivateString TAG = MainActivity.class.getSimpleName ();@Override    protected void onCreate(Bundle savedinstancestate) {Super. OnCreate (Savedinstancestate);        Requestwindowfeature (Window.feature_no_title);        Setcontentview (R.layout.main);        Init ();    Setclicklistener (); }Private void Init() {BACKTX = (TextView) Findviewbyid (r.id.cancle);        Suretx = (TextView) Findviewbyid (R.id.ok);        ImageView = (ImageView) Findviewbyid (r.id.image);        Getpic = (Button) Findviewbyid (r.id.get_pic);    Getpic2cut = (Button) Findviewbyid (r.id.get_pic_to_cut); }Private void Setclicklistener() {Backtx.setonclicklistener ( This); Suretx.setonclicklistener ( This); Getpic.setonclicklistener ( This); Getpic2cut.setonclicklistener ( This); }//Call the system album method of getting pictures, very simple    Private void LoadData() {Intent Intent =NewIntent (intent.action_get_content); Intent.settype ("image/*");    Startactivityforresult (Intent, REQUEST); }@Override    protected void OnDestroy() {Super. OnDestroy (); }@Override     Public void OnClick(View v) {Switch(V.getid ()) { CaseR.id.cancle:finish (); Break; CaseR.id.ok:toast.maketext (mainactivity. This,"The picture has been acquired", Toast.length_short). Show (); Break; CaseR.id.get_pic:loaddata (); Break; CaseR.id.get_pic_to_cut:startphotozoom (URI); Break; }    }@SuppressWarnings("Deprecation")@Override    protected void Onactivityresult(intRequestcode,intResultCode, Intent data) {Super. Onactivityresult (Requestcode, ResultCode, data);if(Requestcode = = REQUEST && ResultCode = = RESULT_OK) {uri = Data.getdata ();/** * Method One: * Directly using the ImageView method to set the image address URI.             * But this way when the picture is very large, prone to oom anomalies, use with caution! */Imageview.setimageuri (URI);/** * Method Two: * Query based on the URI obtained, zoom after the picture is obtained, no oom exception occurs */cursor cursor = managedquery (URI,NULL,NULL,NULL,NULL);if(Cursor! =NULL) {LOG.I (TAG,"number of records ="+cursor.getcount ());if(Cursor.movetofirst ()) {intindex = Cursor.getcolumnindexorthrow (media.data);                    String path = cursor.getstring (index); Bitmapfactory.options Options =NewBitmapfactory.options (); Options.insamplesize =2;                    Bitmap Bitmap = bitmapfactory.decodefile (path, options);                Imageview.setimagebitmap (bitmap); }            }Else{Toast.maketext (mainactivity). This,"Unable to get picture data", Toast.length_short). Show (); }/** * Method Three: * Due to managedquery This method is no longer recommended * So use Cursorloader class to complete the query operation */Cursorloader Cursorloader =NewCursorloader (mainactivity. ThisUriNULL,NULL,NULL,NULL); Cursor Cursor2 = Cursorloader.loadinbackground ();if(Cursor2! =NULL) {LOG.I (TAG,"number of records ="+cursor2.getcount ());if(Cursor2.movetofirst ()) {intindex = Cursor2.getcolumnindexorthrow (media.data);                    String path = cursor2.getstring (index); Bitmapfactory.options Options =NewBitmapfactory.options (); Options.insamplesize =2;                    Bitmap Bitmap = bitmapfactory.decodefile (path, options);                Imageview.setimagebitmap (bitmap); }            }Else{Toast.maketext (mainactivity). This,"Unable to get picture data", Toast.length_short). Show (); }        }Else if(Requestcode = = Head_image_zoom && ResultCode = = RESULT_OK) {Bundle bundle = Data.getextras ();if(Bundle! =NULL) {Bitmap Bitmap = bundle.getparcelable ("Data");            Imageview.setimagebitmap (bitmap); }Else{Toast.maketext (mainactivity). This,"Picture clipping failed", Toast.length_short). Show (); }        }Else if(Requestcode = = head_image_zoom) {Toast.maketext (mainactivity). This,"Picture Cancel Cut", Toast.length_short). Show (); }    }/** * Call the system's program to take pictures of the cut operation * Get a cut picture of a specified size for easy avatar * @param URI */    Private void Startphotozoom(URI Uri) {Intent Intent =NewIntent ("Com.android.camera.action.CROP"); Intent.setdataandtype (URI,"image/*");//Below this crop=true is set to set the display in the open intent view can be croppedIntent.putextra ("Crop","true");//Aspectx aspecty is the ratio of width to heightIntent.putextra ("Aspectx",1); Intent.putextra ("Aspecty",1);//Outputx outputy is cropped picture width highIntent.putextra ("Outputx", the); Intent.putextra ("Outputy", the); Intent.putextra ("Return-data",true);         Startactivityforresult (Intent, head_image_zoom); }}

The above code gets the return value of the process, using three methods, the implementation of the time is only one way. The third way is recommended.
It is worth mentioning that the small project needs to add a permission value in the configuration file:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

Error without this permission!

This small project is very practical, most of the apps have access to the user's avatar, the user's avatar settings, so we can refer to, if there is anything wrong place, please actively message exchange, common progress! Thank you! Handshake

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android-Call system Contentprivder get a single picture to achieve the cut to do avatar and source download