Android:自定義Dialog大小,顯示圓角

經過測試,可以使用.

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        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        AlertDialog dialog = builder.create();
        int screenWidth_px = PX_DP_utils.getScreenWidth_PX(this);
        int screenHeight_px = PX_DP_utils.getScreenheight_PX(this);
        dialog.show();
//需要設置屬性,否則dialog的大小不起作用!必須先show再set屬性
        WindowManager.LayoutParams params = dialog.getWindow().getAttributes();
        params.width = (int) (screenWidth_px * 0.7 + 0.5f);
        params.height = (int) (0.6 * screenHeight_px + 0.5f);
//設置位置的屬性

 Window dialogWindow = dialog.getWindow();
        WindowManager.LayoutParams lp = dialogWindow.getAttributes();
        dialogWindow.setGravity(Gravity.LEFT | Gravity.TOP);

        /*
         * lp.x與lp.y表示相對於原始位置的偏移.
         * 當參數值包含Gravity.LEFT時,對話框出現在左邊,所以lp.x就表示相對左邊的偏移,負值忽略.
         * 當參數值包含Gravity.RIGHT時,對話框出現在右邊,所以lp.x就表示相對右邊的偏移,負值忽略.
         * 當參數值包含Gravity.TOP時,對話框出現在上邊,所以lp.y就表示相對上邊的偏移,負值忽略.
         * 當參數值包含Gravity.BOTTOM時,對話框出現在下邊,所以lp.y就表示相對下邊的偏移,負值忽略.
         * 當參數值包含Gravity.CENTER_HORIZONTAL時
         * ,對話框水平居中,所以lp.x就表示在水平居中的位置移動lp.x像素,正值向右移動,負值向左移動.
         * 當參數值包含Gravity.CENTER_VERTICAL時
         * ,對話框垂直居中,所以lp.y就表示在垂直居中的位置移動lp.y像素,正值向右移動,負值向左移動.
         * gravity的默認值為Gravity.CENTER,即Gravity.CENTER_HORIZONTAL |
         * Gravity.CENTER_VERTICAL.
         * 
         * 本來setGravity的參數值為Gravity.LEFT | Gravity.TOP時對話框應出現在程序的左上角,但在
         * 我手機上測試時發現距左邊與上邊都有一小段距離,而且垂直坐標把程序標題欄也計算在內了,
         * Gravity.LEFT, Gravity.TOP, Gravity.BOTTOM與Gravity.RIGHT都是如此,據邊界有一小段距離
         */
        lp.x = 100; // 新位置X坐標
        lp.y = 100; // 新位置Y坐標
        lp.width = 300; // 寬度
        lp.height = 300; // 高度
        lp.alpha = 0.7f; // 透明度

        // 當Window的Attributes改變時系統會調用此函數,可以直接調用以應用上面對窗口參數的更改,也可以用setAttributes
        // dialog.onWindowAttributesChanged(lp);
        dialogWindow.setAttributes(lp);
Window dialogWindow = dialog.getWindow();dialogWindow.getDecorView().setPadding(0, 0, 0, 0);//去除邊框

        // 必須使用這個方法,不能使用dialog.setView()的方法
        dialog.getWindow().setContentView(R.layout.dialog_picpick_three);
        //設置dialog的背景顏色為透明色,就可以顯示圓角了!!
        dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        dialog.getWindow().setAttributes(params);


//------------------------------------EditText相關代碼,能夠獲取到焦點,能夠直接彈出軟鍵盤.

//解決dilaog中EditText無法彈出輸入的問題
        dialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);

        //彈出對話框后直接彈出鍵盤
        et_newReason.setFocusableInTouchMode(true);
        et_newReason.requestFocus();
        CmzBossApplication.handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                InputMethodManager inputManager =(InputMethodManager) et_newReason.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
                inputManager.showSoftInput(et_newReason, 0);
            }
        }, 100);
//---------------------------解決RecycleView下的matchparent不好用的問題

class MyRVAdapter extends RecyclerView.Adapter<MyRVAdapter.VH> {
    @Override
    public VH onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.exchangeveg_reason_item, parent, false);//必須用這種方式來填充View

        return new VH(view);
    }

    @Override
    public void onBindViewHolder(VH holder, final int position) {
        holder.tv_reason.setText(exchange_veg_reasons.get(position).reason);
        holder.iv_reason_reduce.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //刪除本行的ITEM
                String reason_id = exchange_veg_reasons.get(position).id;
                HttpCashManger.getInstance().postExchangeReduceReason(reason_id, new HttpCallback() {
                    @Override
                    public void onSuccess(String result) {
                        System.out.println("刪除備注信息成功:" + result);
                        exchange_veg_reasons.remove(exchange_veg_reasons.get(position));
                        myRVAdapter.notifyDataSetChanged();
                    }

                    @Override
                    public void onFail(Exception e) {

                    }
                });
            }
        });

    }

    @Override
    public int getItemCount() {
        return exchange_veg_reasons.size();
    }

    class VH extends RecyclerView.ViewHolder {
        public TextView tv_reason;
        public ImageView iv_reason_reduce;

        public VH(View itemView) {
            super(itemView);
            tv_reason = (TextView) itemView.findViewById(R.id.ecr_tuicai_tv_item_reason);
            iv_reason_reduce = (ImageView) itemView.findViewById(R.id.ecr_tuicai_iv_item_reaosn_reduce);
        }
    }

}