• 首先看一下我們建立AlterDialog的步驟

AlertDialog dialog = new AlertDialog.Builder(this)
                .setTitle("標題")
                .setMessage("資訊")
                .setNegativeButton("確定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int
 
 i) {

                    }
                }).setPositiveButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {

                    }
                }).create();
        dialog.show();

• 下面開始修改標題和資訊的style，通過反射實現
  看程式碼`

 /**
     *
     * @param dialog  
     * @param titleSize  標題大小
     * @param titleColor 標題顏色
     * @param msgSize  資訊大小
     * @param msgColor 資訊顏色
     */
    private void modifyAlterDialogStyle(AlertDialog dialog, int titleSize, int titleColor, int msgSize, int msgColor) {
        int defaulteTitleSize = 16
 
;
        int defaulteTitleColor = Color.BLACK;
        int defaulteMsgSize = 14;
        int defaulteMsgColor = Color.BLACK;
        if (titleSize<0) {
            titleSize = defaulteTitleSize;
        }
        if (titleColor<0) {
            titleColor = defaulteTitleColor;
        }
        if (msgSize<0) {
            msgSize = defaulteMsgSize;
        }
        if (msgColor<0) {
            msgColor = defaulteMsgColor;
        }
        Field mAlert = null;
        try {
            mAlert = AlertDialog.class.getDeclaredField("mAlert");
            mAlert.setAccessible(true);
            Object mAlertController = null;
            try {
                mAlertController = mAlert.get(dialog);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
            //通過反射修改title字型大小和顏色
            Field mTitle = mAlertController.getClass().getDeclaredField("mTitleView");
            mTitle.setAccessible(true);
            TextView mTitleView = null;
            try {
                mTitleView = (TextView) mTitle.get(mAlertController);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
            mTitleView.setTextSize(titleSize);
            mTitleView.setTextColor(titleColor);
            //通過反射修改message字型大小和顏色
            Field mMessage = mAlertController.getClass().getDeclaredField("mMessageView");
            mMessage.setAccessible(true);
            TextView mMessageView = null;
            try {
                mMessageView = (TextView) mMessage.get(mAlertController);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
            mMessageView.setTextSize(msgSize);
            mMessageView.setTextColor(msgColor);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }
    }

方法直接呼叫就行，傳入指定的引數就可以了
注意：AlertDialog樣式的修改要在show方法之後進行，否則報錯。

 modifyAlterDialogStyle(dialog,18,-1,16,-1);

• 修改button的style

獲取底部按鈕的例項

 TextView positive_tv =  dialog.getButton(DialogInterface.BUTTON_POSITIVE);
 TextView negative_tv =  dialog.getButton(DialogInterface.BUTTON_NEGATIVE);

拿到物件後就可以任意的操作了。。。

        positive_tv.setText("內容");
        positive_tv.setTextColor(Color.RED);
        positive_tv.setTextSize(16);

over—–