Android图片浏览器：在对话框上兑现图片浏览_Android

Android图片浏览器：在对话框上实现图片浏览

前段时间弄了2个Gallery跟ImageSwitcher实现了图片浏览。

今天介绍一种在对话框上实现图像选择。

先声明，是借鉴别人的做法，觉得确实很好。

实现的效果如下：

部分关键代码如下：

对话框的设置：

重点是

view plain

view plain

view plain

public?void?initImageChooseDialog()?{??
????if(imageChooseDialog?==?null)?{??
????????AlertDialog.Builder?builder?=?new?AlertDialog.Builder(this);??
????????builder.setTitle("请选择图像")??
????????.setView(imageChooseView).setPositiveButton("确定",?new?DialogInterface.OnClickListener()?{??
????????????@Override??
????????????public?void?onClick(DialogInterface?dialog,?int?which)?{??
????????????????imageChanged?=?true;??
????????????????previousImagePosition?=?currentImagePosition;??
????????????????imageButton.setImageResource(images[currentImagePosition%images.length]);??
????????????}??
????????})??
????????.setNegativeButton("取消",?new?DialogInterface.OnClickListener()?{??
??????????????
????????????@Override??
????????????public?void?onClick(DialogInterface?dialog,?int?which)?{??
????????????????currentImagePosition?=?previousImagePosition;??
??????????????????
????????????}??
????????});??
????????imageChooseDialog?=?builder.create();??
????}??
}??

加载图片的方法：

view plain

public?void?loadImage()?{??
????if(imageChooseView?==?null)?{??
????????LayoutInflater?li?=?LayoutInflater.from(AddNew.this);??
????????imageChooseView?=?li.inflate(R.layout.imageswitch,?null);??
??????????
????????//通过渲染xml文件，得到一个视图（View），再拿到这个View里面的Gallery??
????????gallery?=?(Gallery)imageChooseView.findViewById(R.id.gallery);??
????????//为Gallery装载图片??
????????gallery.setAdapter(new?ImageAdapter(this));??
????????gallery.setSelection(images.length/2);??
????????is?=?(ImageSwitcher)imageChooseView.findViewById(R.id.imageswitch);??
????????is.setFactory(this);??
????????is.setInAnimation(AnimationUtils.loadAnimation(this,?android.R.anim.fade_in));??
????????//卸载图片的动画效果??
????????is.setOutAnimation(AnimationUtils.loadAnimation(this,?android.R.anim.fade_out));??
????????gallery.setOnItemSelectedListener(new?OnItemSelectedListener(){??
??
????????????@Override??
????????????public?void?onItemSelected(AdapterView<?>?arg0,?View?arg1,??
????????????????????int?arg2,?long?arg3)?{??
????????????????//当前的头像位置为选中的位置??
????????????????currentImagePosition?=?arg2;??
????????????????//为ImageSwitcher设置图像??
????????????????is.setImageResource(images[arg2?%?images.length]);??
??????????????????
????????????}??
????????????@Override??
????????????public?void?onNothingSelected(AdapterView<?>?arg0)?{??
??????????????????
????????????}});??
????}??
??????
}??

重点，adapter的写法：

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class?ImageAdapter?extends?BaseAdapter?{??
??
????????private?Context?context;??
??????????
????????public?ImageAdapter(Context?context)?{??
????????????this.context?=?context;??
????????}??
??????????
????????@Override??
????????public?int?getCount()?{??
????????????return?Integer.MAX_VALUE;??
????????}??
??
????????@Override??
????????public?Object?getItem(int?position)?{??
????????????return?position;??
????????}??
??
????????@Override??
????????public?long?getItemId(int?position)?{??
????????????return?position;??
????????}??
??
??????????
????????/**?
?????????*?gallery从这个方法中拿到image?
?????????*/??
????????@Override??
????????public?View?getView(int?position,?View?convertView,?ViewGroup?parent)?{??
????????????ImageView?iv?=?new?ImageView(context);??
????????????iv.setImageResource(images[position%images.length]);??
????????????iv.setAdjustViewBounds(true);??
????????????iv.setLayoutParams(new?Gallery.LayoutParams(80,80));??
????????????iv.setPadding(15,?10,?15,?10);??
????????????return?iv;??
??????????????
????????}??
??????????
????}??
??
??????

view plain

//这个是重写的的方法，我给加上注释。我是百度了很久也没找到这个方法的解释。只要对着有道看的源码~~??TAT??
??????
????@Override??
????public?View?makeView()?{??
????????ImageView?view?=?new?ImageView(this);??
????????view.setBackgroundColor(0xff000000);//设置背景边框颜色？??
????????view.setScaleType(ScaleType.FIT_CENTER);//设置?显示的类型??居中显示??
????????view.setLayoutParams(new?ImageSwitcher.LayoutParams(90,90));//设置显示的图片大小??
????????return?view;??
????}??