android工程实现换壁纸功能（转）

最近工作要实现换壁纸小功能,将代码做成demo发出来

没有采用zip格式换肤,因为只是更换一张图片背景

1.将三张图放入drawable-hdpi,我放的是480*800的

2.用sharedPreference存取皮肤的id,以便于下次启动的时候根据id来选择用哪个皮肤,在onresume()里刷新皮肤

3.存到sharedPreference的数据采用string,不能采用图片的id,因为图片的id是每次程序启动后又会重新生成的

不多说了直接上,代码

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();
    }
    /**
     * 更换皮肤
     * 1.点击更换皮肤快捷菜单后
     * 2.程序运行起来后
     */
    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();
    }
}

然后上效果

下载地址:http://download.csdn.net/detail/ethan_xue/4413167

http://blog.csdn.net/ethan_xue/article/details/7720177