代理模式创建Activity

Posted 2020-07-02 2015xbx

代码实现采用构造方法传递参数传递Activity实例的方式

 

public class ActivityHandler {

    protected Activity mActivityInstance;

    public ActivityHandler(Activity activity) {

        mActivityInstance = activity;

    }

    // this one is called before super.onCreate
    public void onPreCreate(Bundle savedInstance) {

    }

    public void onCreate(Bundle savedInstance) {

        ……实现一些公共的创建逻辑
    }

    public void onRestoreInstanceState(Bundle savedInstance) {

    }

    public View onCreateView(String name, Context context, AttributeSet attrs) {
        return null;
    }

    public void onNewIntent() {

    }

    public void onStart() {

    }

 

    public void onResume() {

    }

    public void onPostResume() {

    }

    public void onPause() {

    }

    public void onSaveInstanceState(Bundle outState) {

    }

    public void onStop() {

    }

    public void onDestroy() {

    }

    public void finish() {

    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {

    }

 

    public boolean onBackPressed() {

        return false;

    }

    public void onConfigurationChanged(Configuration newConfig) {

    }

    protected boolean isActivityFinished() {
        return mActivityInstance.isFinishing();
    }

    protected void onFragmentCallback(int action, Bundle data) {

    }

 

    protected void setActionBar(final String title) {

        ……

    }

 

    protected void setBackIconVisibility(int visibility) {

        ……封装一些统一的Activity的方法

    }

    public boolean onCreateOptionsMenu() {

        return false;
    }


    public boolean onOptionsHomeItemSelected() {
        return false;

    }

 

    public View getSupportActionBar() {

        ……

    }

 

    protected boolean inflateMenu(int menuLayoutId) {

        ……实现公共的菜单

    }


    public void dispatchTouchEvent(MotionEvent ev) {

    }


    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {



    }

}

 

public abstract class BaseActivity extends ActivityHandler：

抽象类再封装一次，提供一些具体业务操作的公共方法，和回调的抽象方法

 

 

public class Test1Activity extends BaseActivity：

具体的Activity实现逻辑，重载ActivityHandler的方法，主要的代码逻辑是加载layout文件，处理layout的交互等

 

 

public class ProxyActivity  extends Activity ：

真正的Activity作为一个代理，所有的Activity创建都通过该代理类来进行创建。

 

 

    static final Intent getLaunchIntent(Context ctx, String action, Bundle extras) {

        return ProxyActivity.getLaunchIntent(ctx, action, extras, ForumSDKActivity.class);

    }

 

    static final Intent getLaunchIntent(Context ctx, String action, Bundle extras,

            Class<? extends ProxyActivity  > extend) {

        Intent intent = new Intent(ctx, extend == null ? ProxyActivity.class : extend);

        intent.setAction(action);

        if (extras != null) {

            intent.putExtras(extras);

        }

        return intent;

    }

        Intent intent = ProxyActivity  .getLaunchIntent(mContext, ProxyActivity  .ACTIONS.XXXXXX, null);

        mContext.startActivity(intent);

 

好处就是封装和抽象 代码共享，Activity的统一入口