android 中添加Dialog

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帶進度條的Dialog:
private void showProgess(int progress) {
        try {
            mHandler.post(() -> {
                if (dialog == null) {
                    dialog = new ProgressDialog(UpdateOTAImage.this);
                    dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                    dialog.setCancelable(false);
                    dialog.setCanceledOnTouchOutside(false);
                    dialog.setTitle(UpdateOTAImage.this.getString(R.string.system_update));
                    dialog.setMax(100);
                    dialog.setMessage(UpdateOTAImage.this.getString(R.string.update_progress));
                    dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
                }
                if (!dialog.isShowing()) {
                    dialog.show();
                } else if (progress == 100) {
                    dialog.dismiss();
                    if(!readytoreboot) {
                        rebootOrCancel();
                    }
                } else if (progress > 0) {
                    dialog.setProgress(progress);
                }
            });
        }catch (Exception e){
            e.printStackTrace();
        }

    }

一般AlertDialog 

 private void waitDialog(){
        try {
            mHandler.post(() -> {
                waitDialog = new ProgressDialog(this);
                waitDialog.setTitle(getString(R.string.wait_load_file));
                waitDialog.setCancelable(true);
                waitDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
                waitDialog.show();
            });
        }catch (Exception e){
            e.printStackTrace();
        }
    }