Android常用工具

来源：互联网发布：单页用什么软件有哪些编辑：程序博客网时间：2024/05/26 12:57

显示图片：

// 加载网络图片,设定默认图片

DisplayImageOptions options = new DisplayImageOptions.Builder()
.showImageOnLoading(R.drawable.default_loading_img_100x100)
.showImageForEmptyUri(R.drawable.default_loading_img_100x100)
.showImageOnFail(R.drawable.default_loading_img_100x100)
.build();

ImageLoader.getInstance().displayImage(list.get(0).getImgName(),

fruitImg, options);

// 显示头像
Constants.loadImage(R.drawable.news_head, WorkApplication.getInstance().getFullLogoUrl(), logo);

输入中文转码：

params.put("signInAddress", URLEncoder.encode(locationString, "utf-8"));

String转date形势的String：

Date date = new Date(time);
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");
String strDate=df.format(date);

调接口：

ProgressDialogUtil.showMsgDialogSingle(this);
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("shopId", shopId);
map.put("pNo", pageCouple);
map.put("isFristLoad", isFristLoad);
map.put("isLoadMore", isLoadMore);
MainService.newTask(new Task(TaskType.STORE_COUPON, map));

// 修改其他layout：

//初始化列表
View viewParent = LayoutInflater.from(this).inflate(R.layout.order_goods, null);
ImageView commodityImage = (ImageView) viewParent.findViewById(R.id.commodity_image);

/**
* 设置Listview的高度
*/
public void setListViewHeight(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if(listAdapter == null) {
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}

解析为list集合（先jasonArray）：

public static ConnResult<List<MyHouseInfo>> jsonParseHouseList(String response) {

ConnResult<List<MyHouseInfo>> resultInfo = null;
if (StringUtil.isNull(response)) {
return null;
}
JSONObject obj = null;
try {
resultInfo = new ConnResult<List<MyHouseInfo>>();
obj = new JSONObject(response);
int resultCode = obj.getInt(ConnResult.RESULT_CODE);
resultInfo.setResultCode(resultCode);
resultInfo.setMessage(obj.getString(ConnResult.RESULT_STRING_FLAG));

if (resultCode == NetConstants.RESULTCODE_SUCCESS) {
JSONArray result = obj.getJSONArray(ConnResult.RETURN_INFO_FLAG);

List<MyHouseInfo> list = new ArrayList<MyHouseInfo>();
for (int i = 0; i < result.length(); i++) {
JSONObject object = null;
try {
object = result.getJSONObject(i);

} catch (Exception e) {
e.printStackTrace();
continue;
}
MyHouseInfo myHouseInfo = new MyHouseInfo();
myHouseInfo.setCellName(valueIsEqualsNull(object, "cellName") ? "" : object.getString("cellName"));
myHouseInfo.setHouseId(valueIsEqualsNull(object, "id") ? "" : object.getString("id"));
list.add(myHouseInfo);
}
resultInfo.setResultObject(list);
}
} catch (Exception e) {
e.printStackTrace();
}
return resultInfo;
}

解析为list集合（先jasonObj）：

/**获取店铺列表*/
public static ConnResult<List<StoreListInfo>> jsonParseMallGetShopList(String response) {

ConnResult<List<StoreListInfo>> resultInfo = null;
if (StringUtil.isNull(response)) {
return null;
}
JSONObject obj = null;
try {
resultInfo = new ConnResult<List<StoreListInfo>>();
obj = new JSONObject(response);
int resultCode = obj.getInt(ConnResult.RESULT_CODE);
resultInfo.setResultCode(resultCode);
resultInfo.setMessage(obj.getString(ConnResult.RESULT_STRING_FLAG));

if (resultCode == NetConstants.RESULTCODE_SUCCESS) {

JSONObject result = obj.getJSONObject(ConnResult.RETURN_INFO_FLAG);
List<StoreListInfo> list = new ArrayList<StoreListInfo>();
resultInfo.setTotalPage(valueIsEqualsNull(result, "pages") ? 0 : result.getInt("pages"));
if (result.has("list")) {
JSONArray array = result.getJSONArray("list");
for (int i = 0; i < array.length(); i++) {
JSONObject object = array.getJSONObject(i);
StoreListInfo info = new StoreListInfo();
info.setName(valueIsEqualsNull(object, "name") ? "" : object.getString("name"));
info.setDescrip(valueIsEqualsNull(object, "descrip") ? "" : object.getString("descrip"));
info.setBeginTime(valueIsEqualsNull(object, "beginTime")? "" : object.getString("beginTime"));
info.setEndTime(valueIsEqualsNull(object,"endTime")? "" :object.getString("endTime"));
info.setLogo(valueIsEqualsNull(object,"logo")? "" :object.getString("logo"));

list.add(info);
}
}
resultInfo.setResultObject(list);
}

} catch (Exception e) {
e.printStackTrace();
}
return resultInfo;
}

refresh处理数据：

case TaskType.GET_PLATFORM_COUPON:{
if (msg.obj == null) {
if (!Constants.NetworkStatus) {
Constants.commonToast(getActivity(), R.string.network_error);
}else{
Constants.commonToast(getActivity(), "连接超时");
}
break;
}
ConnResult<List<CouponInfo>> result = (ConnResult<List<CouponInfo>>) msg.obj;
if (result.getResultCode() == NetConstants.RESULTCODE_SUCCESS) {
if (couponInfoList == null) {
couponInfoList = new ArrayList<CouponInfo>();
couponInfoList.addAll(result.getResultObject());
}else {
couponInfoList.clear();
couponInfoList.addAll(result.getResultObject());
}
// 显示数据
initPlatformCoupon();
}else {
Constants.commonToast(getActivity(), result.getMessage());
}
break;
}

onClick跳转页面：

public void onClick(View v) {

Bundle bundle = new Bundle();

switch (v.getId()) {
case R.id.goods_search:
openActivity(MallSearchActivity.class);
break;
case R.id.btn_fruit:
bundle.putString("shopCategoryId", fruitCategoryId);
openActivity(StoreListActivity.class, bundle);
break;

adapter里点击跳转到activity：

viewHold.wholeList.setTag(storeListInfo.getShopId());
viewHold.wholeList.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// 跳转到详情页
Bundle bundle = new Bundle();
bundle.putString("shopId", v.getTag().toString());

Intent intent = new Intent(context, StoreDetailsActivity.class);
if (bundle != null) {
intent.putExtras(bundle);
}
context.startActivity(intent);
}
});

// 监听回车

onCreate{
keywordEdit.setOnKeyListener(onKey);
}

OnKeyListener onKey = new OnKeyListener() {

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_ENTER) {

InputMethodManager imm = (InputMethodManager) v.getContext()
.getSystemService(Context.INPUT_METHOD_SERVICE);

if (imm.isActive()) {

imm.hideSoftInputFromWindow(v.getApplicationWindowToken(),
0);

}
searchText = keywordEdit.getText().toString().trim();
getShopList(true, false);
return true;
}
return false;
}
};

手机输入键盘回车自动搜索：

 //把虚拟键盘的回车改成搜索          good_search.setImeOptions(EditorInfo.IME_ACTION_SEND);         // 监听键盘上的搜索        good_search.setOnEditorActionListener(new TextView.OnEditorActionListener() {              @Override              public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {                  if (actionId==EditorInfo.IME_ACTION_SEND)                   {                           search();                                   }                 return false;              }          });

Fragment收起输入法弹框：

Activity改成this

/** * 收起软键盘并设置提示文字 */protected void hideSoftInput() {          View v = getActivity().getCurrentFocus();          if (v != null && v.getWindowToken() != null) {              InputMethodManager manager = (InputMethodManager) getContext()                      .getSystemService(Context.INPUT_METHOD_SERVICE);              boolean isOpen = manager.isActive();              if (isOpen) {                  imm.hideSoftInputFromWindow(v.getWindowToken(), 0);            }          }      }

需求：在手机中显示图片，宽度为手机宽度，高度根据宽度自适应缩放。

Android-Universal-Image-Loader库中DisplayImageOptions中的函数imageScaleType(ImageScaleType imageScaleType)是用来设置图片的缩放方式，参数如下：

ImageScaleType.EXACTLY :图像将完全按比例缩小的目标大小
ImageScaleType.EXACTLY_STRETCHED:图片会缩放到目标大小完全
ImageScaleType.IN_SAMPLE_INT:图像将被二次采样的整数倍
ImageScaleType.IN_SAMPLE_POWER_OF_2:图片将降低2倍，直到下一减少步骤，使图像更小的目标大小
ImageScaleType.NONE:图片不会调整

设置如下：imageScaleType(ImageScaleType.EXACTLY_STRETCHED)

public static void loadImage(int defaultDrawable, String url, ImageView iv) {if (!url.startsWith("http")) {url = WorkApplication.getInstance().getGlobalImageurl() + url;}        DisplayImageOptions options = new DisplayImageOptions.Builder()            .showImageOnLoading(defaultDrawable)            .showImageForEmptyUri(defaultDrawable)            .showImageOnFail(defaultDrawable)            .imageScaleType(ImageScaleType.EXACTLY_STRETCHED) // 设置图片按比例缩放            .build();                        ImageLoader.getInstance().displayImage(url, iv, options);    }

ImageView设置如下：

<ImageView
    android:id="@+id/image"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/> //高度也可以设置为match_parent，都一样

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