DialogFragment 探索与实现，android 高级工程师面试题

public EverythingDialogFragment setCanceledOnTouchOutside(boolean touchOutside){this.touchOutside=touchOutside;return this;}

public EverythingDialogFragment setWindowAnimations(@StyleRes int resId) {this.animations=resId;return this;}

/**

• 屏蔽返回键

• @param cancel

• @return*/public EverythingDialogFragment setCanceledOnTouch(boolean cancel){this.cancel=cancel;return this;}

/**

• 设置 Style

• @param theme

• @return*/public EverythingDialogFragment setStyle(int theme){this.theme=theme;return this;}

/**

• 设置布局

• @param layoutResID

• @return*/public EverythingDialogFragment setContentView(@LayoutRes int layoutResID) {this.layoutResID = layoutResID;return this;}

/**

• 设置显示的宽

• @param widthPercentSize

• @return*/public EverythingDialogFragment setWidthPercentSize(float widthPercentSize) {this.widthPercentSize = widthPercentSize;return this;}

/**

• 显示高

• @param heightPercentSize

• @return*/public EverythingDialogFragment setHeightPercentSize(float heightPercentSize) {this.heightPercentSize = heightPercentSize;return this;}

private void setFragmentManager(FragmentManager manager) {try {manager.beginTransaction().remove(this).commitAllowingStateLoss();super.show(manager, getClass().getSimpleName());} catch (Exception e) {e.printStackTrace();}}

public EverythingDialogFragment show(Object obj){if (obj!=null){if (obj instanceof FragmentActivity){FragmentActivity activity = (FragmentActivity) obj;setFragmentManager(activity.getSupportFragmentManager());}else if (obj instanceof Fragment){Fragment fragment = (Fragment) obj;setFragmentManager(fragment.getFragmentManager());}else {throw new IllegalArgumentException("not is FragmentManager");}}return this;}

/**

• 设置显示屏幕大小*/private void setDialogSize(float widthPercent, float heightPercent) {DisplayMetrics dm = new DisplayMetrics();FragmentActivity activity = getActivity();Dialog dialog = getDialog();if (activi

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ty != null && dialog != null) {activity.getWindowManager().getDefaultDisplay().getMetrics(dm);Window window = dialog.getWindow();if (window != null) {window.getDecorView().setPadding(0, 0, 0, 0);WindowManager.LayoutParams lp = window.getAttributes();

lp.width = widthPercent == 0 ?WindowManager.LayoutParams.WRAP_CONTENT : widthPercent == 1 ?WindowManager.LayoutParams.MATCH_PARENT : (int) (dm.widthPixels * widthPercent);

lp.height = heightPercent == 0 ?WindowManager.LayoutParams.WRAP_CONTENT : heightPercent == 1 ?WindowManager.LayoutParams.MATCH_PARENT : (int) (dm.heightPixels * heightPercent);

window.setAttributes(lp);window.setBackgroundDrawable(new ColorDrawable());}}}

/**

• 可以暴露所有的 view*/public interface ConvertViewListener{void convertView(EverythingDialogHolder holder, final EverythingDialogFragment dialog);}

private ConvertViewListener viewConvertListener;

public EverythingDialogFragment setConvertViewListener(ConvertViewListener l){viewConvertListener=l;return this;}

private OnChildClickListener childClickListener;

public OnChildClickListener getOnChildClickListener() {return childClickListener;}

/**

• 设置子 View Listener*/public EverythingDialogFragment setOnChildClickListener(OnChildClickListener l, @IdRes final int ...viewIds){childClickListener=l;addIdRes(viewIds);return this;}

/**

• 设置子 View Listener*/public EverythingDialogFragment setOnChildClickListener(OnChildClickListener l){childClickListener=l;return this;}

/**

• 子 view 添加

• @param viewIds

• @return*/public EverythingDialogFragment addIdRes(@IdRes final int ...viewIds){this.viewIds=viewIds;return this;}

}

public class EverythingDialogHolder {

private final SparseArray<View> views;private final View convertView;private final LinkedHashSet<Integer> childClickViewIds;private final EverythingDialogFragment dialogFragment;

public EverythingDialogHolder(View convertView, EverythingDialogFragment dialogFragment) {this.convertView = convertView;this.views = new SparseArray<>();this.childClickViewIds =new LinkedHashSet<>();this.dialogFragment=dialogFragment;}

public static EverythingDialogHolder create(View view, EverythingDialogFragment dialogFragment) {return new EverythingDialogHolder(view,dialogFragment);}

public <T extends View> T findViewById(@IdRes int viewId) {View view = views.get(viewId);if (view == null) {view = convertView.findViewById(viewId);views.put(viewId, view);}return (T) view;}

/**

• 添加子 view Listener

• @param viewIds

• @return*/public EverythingDialogHolder addChildClickListener(@IdRes final int ...viewIds) {for (int viewId : viewIds) {childClickViewIds.add(viewId);final View view = findViewById(viewId);if (view != null) {if (!view.isClickable()) {view.setClickable(true);}view.setOnClickListener(v -> {if (dialogFragment !=null && dialogFragment.getOnChildClickListener() != null){dialogFragment.getOnChildClickListener().onChildViewClick(dialogFragment,v);}