Android打造万能的对话框Dialog(三)

打造万能的对话框Dialog(三)

已经写了两篇了，这下来一篇高级点的，仿照AlertDialog封装我们想要的Dialog的对话框

具体那种方式跟适合你，你自己来选，不过如果只是为了简单实用，我感觉上一篇的封装方式也许更合适

先看图，没图说个毛线

简单介绍

前面也说了，我们这次要玩一个高级的，仿照Android系统提供AlertDialog的来写。首先、我们怎么着也得先看一下源码吧（这个自己看吧，就不带领你们来看了）

AlertDialog源码总结

1、建立Builder类，这个是为了构建和设置参数的（这里说明一下，最好是了解一下建造者模式）

2、建立Dialog所需要的参数类

3、参数和对话框进行数据绑定

4、搞定，进行使用就可以（同AlertDialog用法相同）

建立Builder类

public static class Builder {

private DialogParams P;

public Builder(Context context){
// 如果没有传默认的就是自定义的主题
this(context, 0);
}

public Builder(Context context,int themeResId){
P = new DialogParams(context,themeResId);
}

/**
* Set a custom view resource to be the contents of the Dialog. The
* resource will be inflated, adding all top-level views to the screen.
*
* @param layoutResId Resource ID to be inflated.
* @return this Builder object to allow for chaining of calls to set
*         methods
*/
public Builder setView(int layoutResId) {
P.mView = null;
P.mViewLayoutResId = layoutResId;
return this;
}

/**
* Sets a custom view to be the contents of the alert dialog.
* <p>
* When using a pre-Holo theme, if the supplied view is an instance of
* a {@link ListView} then the light background will be used.
* <p>
* <strong>Note:</strong> To ensure consistent styling, the custom view
* should be inflated or constructed using the alert dialog's themed
* context obtained via {@link #getContext()}.
*
* @param view the view to use as the contents of the alert dialog
* @return this Builder object to allow for chaining of calls to set
*         methods
*/
public Builder setView(View view) {
P.mView = view;
P.mViewLayoutResId = 0;
return this;
}

/**
* 设置宽度
*/
public Builder setWidth(int width){
P.mWidth = width;
return this;
}

/**
* 设置高度
*/
public Builder setHeight(int height){
P.mHeight = height;
return this;
}

/**
* 显示动画
*/
public Builder showAnimationFromBottom(){
P.mAnimation = R.style.main_menu_animstyle;
P.mGravity = Gravity.BOTTOM;
return this;
}

public Builder setGravity(int gravity){
P.mGravity = gravity;
return this;
}

/**
* 显示动画  可以自定动画
*/
public Builder showAnimation(int styleResId){
P.mAnimation = styleResId;
return this;
}

public CommonDialog create() {
// Context has already been wrapped with the appropriate theme.
final CommonDialog dialog = new CommonDialog(P.context, P.themeResId);
// 绑定一些参数
dialog.apply(P);
return dialog;
}

建立参数类

public static class DialogParams{
public Context context;
public int themeResId;
public View mView;
public int mViewLayoutResId;
public int mHeight = ViewGroup.LayoutParams.WRAP_CONTENT;
public int mWidth = ViewGroup.LayoutParams.WRAP_CONTENT;
public int mAnimation = 0;
public int mGravity = Gravity.CENTER;

public DialogParams(Context context, int themeResId) {
this.context = context;
this.themeResId = themeResId;
}
}

参数和对话框进行数据绑定

/**
* 绑定和设置参数
*/
private void apply(Builder.DialogParams P) {
mDialogView = P.mView;// 资源  View

if(mDialogView == null && P.mViewLayoutResId == 0){
throw new NullPointerException("大哥请设置布局!!!");
}

mDialogView = View.inflate(P.context,P.mViewLayoutResId,null);

// 设置布局
setContentView(mDialogView);

// 设置基本参数
Window window = getWindow();

window.setLayout(P.mWidth, P.mHeight);

window.setGravity(P.mGravity);

if(P.mAnimation != 0) {
window.setWindowAnimations(P.mAnimation);
}

}

使用

findViewById(R.id.btn_center).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

CommonDialog.Builder  builder = new CommonDialog.Builder(MainActivity.this,R.style
.DialogTheme);
builder.setView(R.layout.dialog_center)
.setGravity(Gravity.CENTER);
CommonDialog dialog = builder.create();
dialog.show();

}
});

总结

可能很多人会说，为什么全是代码。一点废话都没有，我想说的是，也许真的是太简单了，所以就略过白话问了。如果还是不懂，代码奉上。

源码下载

源码下载