Android Dialog自定义弹窗

浅浅的花香味﹌ 2024-03-26 19:38 59阅读 0赞

1、加载自定义的弹窗内容

private void showDialog(Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setTitle("弹窗标题");
        LayoutInflater inflater = LayoutInflater.from(context);
        //弹窗需要展示什么内容，就在 R.layout.my_dialog 自己添加
        View root = inflater.inflate(R.layout.my_dialog, null);
        builder.setView(root);
        AlertDialog dialog = builder.create();
        dialog.show();
    }

2、自定义弹窗宽高(按屏幕总宽高的百分比来设置)要在 dialog.show() 之后调用

private static final float SCALE_WIDTH = 0.75f;//弹窗宽度百分比
    private static final float SCALE_HEIGHT = 0.8f;//弹窗高度百分比
    
    private void setDialogSize(Context context, AlertDialog dialog) {
        Window window = dialog.getWindow();
        DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
        int screenWidth = displayMetrics.widthPixels;
        int screenHeight = displayMetrics.heightPixels;
        WindowManager.LayoutParams dialogParems = window.getAttributes();
        dialogParems.width = (int) (screenWidth * SCALE_WIDTH);//可以设置具体的值，比如500，单位是px
        dialogParems.height = (int) (screenHeight * SCALE_HEIGHT);
        window.setAttributes(dialogParems);
    }

3、设置点击弹窗输入框时允许弹出输入法软键盘

mDialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
    mDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);

4、设置弹窗是否可以消失（点击取消或确认时）

//canDismiss：如果传参true，则弹窗正常消失，如果传参false，则点击确认或取消按钮后弹窗不消失
    private static void setDialogCanDismiss(boolean canDismiss) {
        try {
            Field field = mDialog.getClass().getSuperclass().getDeclaredField("mShowing");
            field.setAccessible(true);
            field.set(mDialog, canDismiss);
        } catch (Exception e) {
            Log.e("tag", Objects.requireNonNull(e.getMessage()));
        }
    }
    
    //用法如下：
    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            //点击了确定按钮，此时自己做一些判断，看是否需要弹窗不消失继续显示
            if (inNeedShowDialog) {
                //设置弹窗不消失
                setDialogCanDismiss(false);
            } else {
                //设置弹窗可以消失
                setDialogCanDismiss(true);
            }
        }
    });
    builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            //设置弹窗可以消失
            setDialogCanDismiss(true);
            mDialog.dismiss();
        }
    });

5、弹窗返回数据的接口定义，接口名、函数名、参数名、数据类型都可以根据实际需求灵活自定义

interface IDialogResult {
        void onGetResult(List<HashMap<String, String>> result);
    }

6、弹窗自定义view常用的一些api

int childCount = parentView.getChildCount();//获取父控件中子控件的数量
    View childView = parentView.getChildAt(position);//获取指定位置的子控件对象
    parentView.removeView(parentView.getChildAt(position));//移除指定位置的子控件对象
    parentView.removeView(childView);//移除指定的子控件对象
    parentView.addView(childView);//插入子控件

7、其它：EditText控件监听焦点丢失事件以及软键盘点击回车键事件

private void addLostFocusListener(EditText editText, int position) {
        editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (!hasFocus) {
                    //TODO
                }
            }
        });
        editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                if (actionId == EditorInfo.IME_ACTION_SEND || actionId == EditorInfo.IME_ACTION_DONE || (event != null && KeyEvent.KEYCODE_ENTER == event.getKeyCode() && KeyEvent.ACTION_DOWN == event.getAction())) {
                    editText.clearFocus();
                }
                return true;
            }
        });
    }