Android之使用RatingBar设置游戏难度并保存
openkk
13年前
最近在学习游戏开发，在游戏中常常需要设置游戏的难度，在Android中我们可以使用RatingBar来实现。具体看下面的代码：
效果图如下：
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; /** * 游戏设置类,游戏难度等 * @author Cloay * 2011-12-23 * 下午05:21:41 */ public class SettingsActivity extends BasicActivity{ private SharedPreferences settings; //保存设置 private RatingBar ratingBar; private TextView defaultPicture; private TextView picture; private ImageView previewImage; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.settings); BasicActivity.allActivity.add(this); //初始化数据 initData(); } /** * 初始化数据 */ private void initData() { settings = getSharedPreferences("settings", 0); ratingBar = (RatingBar) findViewById(R.id.rating); //游戏默认图片 defaultPicture = (TextView) findViewById(R.id.def); //从图库中选择图片，自定义 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", ""))); } //设置难度选择监听 ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() { @Override public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) { settings.edit().putInt("level", (int)rating).commit(); //保存用户设置后的游戏难度 showToast(SettingsActivity.this, (int)rating); } }); //设置图片选择监听 defaultPicture.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { settings.edit().putString("picture", "").commit(); previewImage.setImageResource(R.drawable.def); } }); picture.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(); /* 开启Pictures画面Type设定为image */ intent.setType("image/*"); /* 使用Intent.ACTION_GET_CONTENT这个Action */ intent.setAction(Intent.ACTION_GET_CONTENT); /* 取得相片后返回本画面 */ startActivityForResult(intent, 1); } }); } @Override protected 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); } }通过设置setOnRatingBarChangeListener监听器来获取用户选择RatingBar的值，获取之后往往需要保存，通常使用SharedPrefence即可，也可选用SQLite等 转自：http://blog.csdn.net/shang_515/article/details/7313412