Android uses ratingbar to set game difficulty and save

Recently I have been studying game development. In games, it is often necessary to set the difficulty of the game. In Android, we can use RatingBar. For details, refer to the following code:

As follows:

Package com.cloay.pt. ui; import java. io. fileNotFoundException; import java. io. IOException; import android. content. contentResolver; import android. content. intent; import android. content. sharedPreferences; import android. graphics. bitmap; import android. graphics. bitmapFactory; import android.net. uri; import android. OS. bundle; import android. view. view; import android. view. view. onClickListener; import android. widget. imageView; import android. widget. ratingBar; import android. widget. ratingBar. onRatingBarChangeListener; import android. widget. textView; import com.cloay.pt. basicActivity; import com.cloay.pt. r; import com.cloay.pt. constants. constant; import com.cloay.pt. utils. imageUtil;/*** game settings, game difficulty, etc. * @ author Cloay * 2011-12-23*05:21:41 */public class SettingsActivity extends BasicActivity {private SharedPreferences settings; // save and set private RatingBar ratingBar; private TextView defaultPicture; private TextView picture; private ImageView previewImage; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. settings); BasicActivity. allActivity. add (this); // initialize data initData () ;}/ *** initialize data */private void initData () {settings = getSharedPreferences ("settings", 0 ); ratingBar = (RatingBar) findViewById (R. id. rating); // default Game Image defaultPicture = (TextView) findViewById (R. id. def); // select an image from the image library and customize picture = (TextView) findViewById (R. id. picture); previewImage = (ImageView) findViewById (R. id. preview); if ("". equals (settings. getString ("picture", "") {previewImage. setImageResource (R. drawable. def);} else {previewImage. setImageBitmap (ImageUtil. getBitmapFromSDCard (settings. getString ("picture", "");} // select the listener ratingBar to set the difficulty. setOnRatingBarChangeListener (new OnRatingBarChangeListener () {@ Overridepublic void onRatingChanged (RatingBar ratingBar, float rating, boolean fromUser) {settings. edit (). putInt ("level", (int) rating ). commit (); // save the game difficulty showToast (SettingsActivity. this, (int) rating) ;}}); // sets the image to listen to defapicpicture. setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {settings. edit (). putString ("picture ",""). commit (); previewImage. setImageResource (R. drawable. def) ;}}); picture. setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {Intent intent = new Intent ();/* set Pictures image Type to image */intent. setType ("image/*");/* use Intent. ACTION_GET_CONTENT this Action */intent. setAction (Intent. ACTION_GET_CONTENT);/* returns the current screen after obtaining the photo */startActivityForResult (intent, 1) ;}}@ Overrideprotected void onActivityResult (int requestCode, int resultCode, Intent data) {if (resultCode = RESULT_ OK) {Uri uri = data. getData (); ContentResolver cr = this. getContentResolver (); try {Bitmap bitmap = BitmapFactory. decodeStream (cr. openInputStream (uri); try {saveBitmap ("cloay", bitmap);} catch (IOException e) {e. printStackTrace ();} settings. edit (). putString ("picture", Constant. picPath + "cloay.png "). commit (); previewImage. setImageBitmap (bitmap);} catch (FileNotFoundException e) {settings. edit (). putString ("picture ",""). commit (); previewImage. setImageResource (R. drawable. def) ;}} super. onActivityResult (requestCode, resultCode, data );}}

You can set the setOnRatingBarChangeListener listener to obtain the value of the user-selected RatingBar. After obtaining the value, you often need to save it. Generally, you can use SharedPrefence or SQLite. For details about how to use SharedPrefence, see the usage of Android SharedPreferences.

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