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

沒有采用zip格式換膚,因爲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,以便於下次啓動的時候根據id來選擇用哪個皮膚,在onresume()裏刷新皮膚

3.存到sharedPreference的數據採用string,不能採用圖片的id,因爲圖片的id是每次程序啓動後又會重新生成的

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() {
			
			@Override
			public 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.點擊更換皮膚快捷菜單後
     * 2.程序運行起來後
     */
	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

下載地址:http://download.csdn.net/detail/ethan_xue/4413167