自定义一个Dialog你需要做那些事？

1.写一个Dialog样式继承android:style/Theme.Dialog

image.gif

注：没有引入自定义主题可能会出现dialog大小异常，外部有系统dialog框...一些列问题。

2.写一个类继承Dialog

public class WithdrawDialog extends Dialog {

    private ImageView iv_cancel;
    private TextView tv_awardCount;
    private TextView tv_cancel;
    private TextView tv_confirm;

    private onNoOnclickListener noOnclickListener;//取消按钮被点击了的监听器
    private onYesOnclickListener yesOnclickListener;//确定按钮被点击了的监听器

    public WithdrawDialog(@NonNull Context context) {
        super(context);
    }

    public WithdrawDialog(@NonNull Context context, int themeResId) {
        super(context, themeResId);
    }

    protected WithdrawDialog(@NonNull Context context, boolean cancelable, @Nullable OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
    }

    /**
     * 设置取消按钮的显示内容和监听
     * @param onNoOnclickListener
     */
    public void setNoOnclickListener(onNoOnclickListener onNoOnclickListener) {
        this.noOnclickListener = onNoOnclickListener;
    }

    /**
     * 设置确定按钮的显示内容和监听
     * @param onYesOnclickListener
     */
    public void setYesOnclickListener(onYesOnclickListener onYesOnclickListener) {
        this.yesOnclickListener = onYesOnclickListener;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_withdraw);
        //按空白处能否取消动画
        setCanceledOnTouchOutside(true);
        //初始化界面控件
        initView();
        //初始化界面控件的事件
        setListener();
    }

    private void setListener() {
        tv_cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (noOnclickListener != null) {
                    noOnclickListener.onNoClick();
                }
            }
        });
        iv_cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (noOnclickListener != null) {
                    noOnclickListener.onNoClick();
                }
            }
        });
        tv_confirm.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (yesOnclickListener != null) {
                    yesOnclickListener.onYesClick();
                }
            }
        });
    }

    public void setAwardCount(String awardCount) {
        tv_awardCount.setText(awardCount);
    }

    private void initView() {
        iv_cancel = (ImageView) findViewById(R.id.iv_cancel);
        tv_awardCount = (TextView) findViewById(R.id.tv_awardCount);
        tv_cancel = (TextView) findViewById(R.id.tv_cancel);
        tv_confirm = (TextView) findViewById(R.id.tv_confirm);
    }

    /**
     * 设置确定按钮和取消被点击的接口
     */
    public interface onYesOnclickListener {
        public void onYesClick();
    }

    public interface onNoOnclickListener {
        public void onNoClick();
    }
}

image.gif

注：通过接口回掉可以在使用该dialog的类中设置监听事件。

3.在需要显示自定义dialog的地方写自己的显示方法和设置监听

private void showWithdrawDialog(String awardCount){
        final WithdrawDialog dialog = new WithdrawDialog(this, R.style.MyDialog);
        dialog.setNoOnclickListener(new WithdrawDialog.onNoOnclickListener() {
            @Override
            public void onNoClick() {
                dialog.dismiss();
            }
        });
        dialog.setYesOnclickListener(new WithdrawDialog.onYesOnclickListener() {
            @Override
            public void onYesClick() {
                Toast.makeText(WithdrawActivity.this, "调用提现接口", Toast.LENGTH_SHORT).show();
            }
        });
        dialog.show();
        //放在show()方法之后否则空指针
        dialog.setAwardCount(awardCount);
    }

image.gif

注：改变dialog的UI组件的内容需要在show()方法之后，否则空指针（UI组件尚未加载完成）。

4.效果如下图：

image

image.gif

​