Android(安卓)请求网络loading 结果显示error empty界面
16lz
2021-01-26
在进行网络请求中，我们希望给用户一个提示，让用户知道正在加载中(就是一个loading动画)。当加载成功或者失败后，我们又能返回对应的结果给用户，让用户一目了然，知道什么原因，之后又可以进一步处理。
1、代码很简单，创建一个类继承FrameLayout
import android.content.Context;import android.util.AttributeSet;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.FrameLayout;import android.widget.TextView;public class StatusViewLayout extends FrameLayout { private View mLoadingView; private View mErrorView; private View mEmptyView; private OnClickListener mOnRetryListener; private TextView status_view_tv_error; private TextView status_tv_empty_msg; public StatusViewLayout(Context context) { this(context, null); } public StatusViewLayout(Context context, AttributeSet attrs) { this(context, attrs, 0); } public StatusViewLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); setUpView(); } private void setUpView() { FrameLayout.LayoutParams mLayoutParams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); mLayoutParams.gravity = Gravity.CENTER; mLoadingView=LayoutInflater.from(getContext()).inflate(R.layout.status_view_layout_loading, null); mErrorView = LayoutInflater.from(getContext()).inflate(R.layout.status_view_layout_error, null); mEmptyView = LayoutInflater.from(getContext()).inflate(R.layout.status_view_layout_empty, null); status_view_tv_error = (TextView) mErrorView.findViewById(R.id.status_view_tv_error); status_tv_empty_msg = (TextView) mEmptyView.findViewById(R.id.status_tv_empty_msg); addView(mLoadingView, mLayoutParams); addView(mErrorView, mLayoutParams); addView(mEmptyView, mLayoutParams); mErrorView.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (mOnRetryListener != null) { showLoading(); mOnRetryListener.onClick(view); } } }); mEmptyView.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (mOnRetryListener != null) { showLoading(); mOnRetryListener.onClick(view); } } }); } public void setOnRetryListener(OnClickListener listener) { mOnRetryListener = listener; } @Override protected void onFinishInflate() { super.onFinishInflate(); showLoading(); } public void showLoading() { for (int i = 0; i < getChildCount(); i++) { getChildAt(i).setVisibility(View.GONE); } mLoadingView.setVisibility(View.VISIBLE); } public void showError() { for (int i = 0; i < getChildCount(); i++) { getChildAt(i).setVisibility(View.GONE); } mErrorView.setVisibility(View.VISIBLE); } public void showError(String msg) { showError(); status_view_tv_error.setText(msg); } public void showEmpty() { for (int i = 0; i < getChildCount(); i++) { getChildAt(i).setVisibility(View.GONE); } mEmptyView.setVisibility(View.VISIBLE); } public void showEmpty(String msg) { showEmpty(); status_tv_empty_msg.setText(msg); } public void showContent() { for (int i = 0; i < getChildCount(); i++) { getChildAt(i).setVisibility(View.GONE); } getChildAt(getChildCount() - 1).setVisibility(View.VISIBLE); }}2、耗时加载的界面中初始化StatusViewLayout
public class MainActivity extends AppCompatActivity { private StatusViewLayout mStatusView; private TextView mContent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } /** * 初始化 */ private void initView() { // findView mStatusView = (StatusViewLayout) findViewById(R.id.main_status_view); mContent = (TextView) findViewById(R.id.main_content); // 初始化mStatusView一开始状态为loading// mStatusView.showLoading(); mStatusView.showContent(); // 当状态为error、empty事件回调 mStatusView.setOnRetryListener(new View.OnClickListener() { @Override public void onClick(View view) { requestData(); } }); // mContent添加点击事件 mContent.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { mStatusView.showLoading(); requestData(); } }); } /** * 网络请求 */ private void requestData() { String url = "http://gank.io/api/data/Android/50/1"; // ok-go github：https://github.com/jeasonlzy/okhttp-OkGo OkGo.get(url) .tag(this) .execute(new StringCallback() { @Override public void onSuccess(String s, Call call, Response response) { // 解析json parsingJson(s); } @Override public void onError(Call call, Response response, Exception e) { super.onError(call, response, e); // 异常状态 mStatusView.showError(); } }); } /** * 解析json * * @param s 请求结果 */ private void parsingJson(String s) { try { JSONObject jsonObject = new JSONObject(s); if (!jsonObject.getBoolean("error")) { mStatusView.showContent(); mContent.setText(jsonObject.getJSONArray("results").get(0).toString()); } else mStatusView.showEmpty(); } catch (JSONException e) { e.printStackTrace(); } } @Override protected void onDestroy() { super.onDestroy(); // 取消请求 OkGo.getInstance().cancelTag(this); }}3、xml中，使用StatusViewLayout包裹你的content，StatusViewLayout继承的是FrameLayout，因此可以看作一个FrameLayout布局。
<?xml version="1.0" encoding="utf-8"?><com.wz.statusviewdemo.StatusViewLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/main_status_view" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.wz.statusviewdemo.MainActivity"> <TextView android:id="@+id/main_content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!"/>com.wz.statusviewdemo.StatusViewLayout>4、loading.xml、error.xml和empty.xml可以自己定义
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" android:orientation="vertical"> <ProgressBar android:id="@+id/progressBar" android:layout_width="30dp" android:layout_height="30dp"/> <TextView android:id="@+id/loading" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:text="数据加载中..." android:textColor="@android:color/darker_gray" android:textSize="16sp"/>LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" android:orientation="vertical"> <ImageView android:layout_width="50dp" android:layout_height="50dp" android:src="@drawable/icon_status_error" /> <TextView android:id="@+id/status_view_tv_error" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:text="加载出错了" android:textColor="@android:color/darker_gray" android:textSize="16sp" />LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_horizontal" android:orientation="vertical"> <ImageView android:layout_width="50dp" android:layout_height="50dp" android:src="@drawable/icon_status_empty"/> <TextView android:id="@+id/status_tv_empty_msg" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:text="数据为空" android:textColor="@android:color/darker_gray" android:textSize="16sp"/>LinearLayout>更多相关文章
- Android高手进阶教程(十)-----Android(安卓)PopupWindow的使用!!
- [置顶] Android之 AndroidManifest.xml 文件解析
- android 自动弹出软件盘和不弹出设置
- Android(安卓)WIFI框架分析（1）
- [Android]高性能MMKV数据交互分析-MMKV初始化
- Android：如何给ScrollView添加滑块滚动条
- mtopsdk(淘宝系android app使用的sdk)强迫请求通过代理进行抓包
- 【Android(安卓)Developers Training】 16. 暂停和恢复一个Activ
- Android--Task(stack)的使用