android工程實現換壁紙功能

最近工作要實現換壁紙小功能,將代碼做成demo發出來

沒有採用zip格式換膚,因為只是更換一張圖片背景

1.將三張圖放入drawable-hdpi,我放的是480*800的

2.用sharedPreference存取皮膚的id,以便於下次啟動的時候根據id來選擇用哪個皮膚,在onresume()裡重新整理皮膚

3.存到sharedPreference的資料採用string,不能採用圖片的id,因為圖片的id是每次程式啟動後又會重建的

不多說了直接上,代碼

public class ChangeSkinActivity extends Activity {private static final String SKIN_ID = "skin_id";    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        this.requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.main);        Button btnChangeSkin = (Button) findViewById(R.id.btnChangeSkin);        btnChangeSkin.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if ("bg0".equals(getSkinResourceName())) {setSkinResourceName("bg1");}else if ("bg1".equals(getSkinResourceName())) {setSkinResourceName("bg2");}else if ("bg2".equals(getSkinResourceName())) {setSkinResourceName("bg0");}refreshSkin();}});    }    @Override    protected void onResume() {    super.onResume();    refreshSkin();    }    /**     * 更換皮膚     * 1.點擊更換皮膚捷徑功能表後     * 2.程式運行起來後     */private void refreshSkin() {int skinId = getSkinResourceId();findViewById(R.id.layout).setBackgroundResource(skinId);}private int getSkinResourceId(){    int skinId = R.drawable.bg0;    String skinName=getSkinResourceName();    if(skinName.equals("bg1")){    skinId = R.drawable.bg1;    } else if(skinName.equals("bg2")){    skinId = R.drawable.bg2;    }    return skinId;}private String getSkinResourceName() {try {SharedPreferences preferences = getSharedPreferences("skinxml", Context.MODE_PRIVATE);return preferences.getString(SKIN_ID, "bg0");} catch (Exception e) {e.printStackTrace();return  "bg0";}}private void setSkinResourceName(String skinName) {SharedPreferences preferences = getSharedPreferences("skinxml", Context.MODE_PRIVATE);Editor editor =  preferences.edit();editor.putString(SKIN_ID, skinName);editor.commit();}}

然後上效果

:http://download.csdn.net/detail/ethan_xue/4413167