弹框(AlertDialog)和提示信息Toast字体大小颜色设置

一、AlertDialog:

             AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
                builder.setTitle("温馨提示");
                builder.setMessage("是否进行下一个病人？");
                builder.setPositiveButton("是", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                      //处理你的操作

                    }
                });
                builder.setNegativeButton("否", null);
                AlertDialog dialog = builder.create();
                dialog.show();
                //弹框设置字体颜色
                dialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.BLUE);
                dialog.getButton(DialogInterface.BUTTON_NEGATIVE).setTextColor(Color.BLUE);
                try {
                    //获取mAlert对象
                    Field mAlert = AlertDialog.class.getDeclaredField("mAlert");
                    mAlert.setAccessible(true);
                    Object mAlertController = mAlert.get(dialog);
                    //获取mMessageView并设置大小颜色
                    Field mMessage = mAlertController.getClass().getDeclaredField("mMessageView");
                    mMessage.setAccessible(true);
                    TextView mMessageView = (TextView) mMessage.get(mAlertController);
                    mMessageView.setTextColor(Color.BLUE);
//                    mMessageView.setTextSize(30);
                    //获取mTitleView并设置大小颜色
                    Field mTitle = mAlertController.getClass().getDeclaredField("mTitleView");
                    mTitle.setAccessible(true);
                    TextView mTitleView = (TextView) mTitle.get(mAlertController);
                    mTitleView.setTextColor(Color.BLUE);
//                    mTitleView.setTextSize(30);
                } catch (NoSuchFieldException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }

二、Toast:

private Toast mToast;
private void showTip(final String str){
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            if (mToast == null) {
                mToast = Toast.makeText(getApplicationContext(), "",
                        Toast.LENGTH_SHORT);
                LinearLayout layout = (LinearLayout) mToast.getView();
                TextView tv = (TextView) layout.getChildAt(0);
                tv.setTextSize(18);
            }
            //mToast.cancel();
            mToast.setGravity(Gravity.CENTER, 0, 0);
            mToast.setText(str);
            mToast.show();
        }
    });
}

  例如：Toast提示"登录成功",直接使用showTip("登录成功")即可。
  注意：fragment里面使用时将runOnUiThread替换成getActivity().runOnUiThread即可。