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‎androidTest/java/top/grapedge/grapeschat/ExampleInstrumentedTest.java

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package top.grapedge.grapeschat;
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import android.content.Context;
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import android.support.test.InstrumentationRegistry;
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import android.support.test.runner.AndroidJUnit4;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import static org.junit.Assert.*;
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/**
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* Instrumented test, which will execute on an Android device.
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*
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* @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
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*/
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@RunWith(AndroidJUnit4.class)
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public class ExampleInstrumentedTest {
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@Test
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public void useAppContext() {
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// Context of the app under test.
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Context appContext = InstrumentationRegistry.getTargetContext();
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assertEquals("top.grapedge.qqlogin", appContext.getPackageName());
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}
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}

‎main/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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package="top.grapedge.qqlogin">
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<uses-permission android:name="android.permission.INTERNET" />
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/AppTheme"
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android:usesCleartextTraffic="true"
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tools:ignore="GoogleAppIndexingWarning">
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<activity android:name="top.grapedge.grapeschat.SplashActivity">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<activity android:name="top.grapedge.grapeschat.LoginActivity">
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<intent-filter>
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<action android:name="top.grapedge.qqlogin.intent.action.LOGIN" />
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<category android:name="android.intent.category.DEFAULT" />
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</intent-filter>
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</activity>
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<activity android:name="top.grapedge.grapeschat.MainActivity" />
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<activity
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android:name="top.grapedge.grapeschat.RegisterActivity"
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android:label="注册" />
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<activity android:name="top.grapedge.grapeschat.AddFriendActivity"/>
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</application>
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</manifest>

‎main/java/top/grapedge/grapeschat/AddFriendActivity.java

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package top.grapedge.grapeschat;
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import android.content.Context;
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import android.os.Bundle;
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import android.support.annotation.NonNull;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.RecyclerView;
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import android.view.KeyEvent;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.inputmethod.EditorInfo;
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import android.view.inputmethod.InputMethodManager;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.TextView;
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import android.widget.Toast;
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import com.google.gson.Gson;
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import com.google.gson.reflect.TypeToken;
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import java.util.ArrayList;
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import java.util.List;
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import top.grapedge.qqlogin.R;
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public class AddFriendActivity extends BaseActivity implements TextView.OnEditorActionListener {
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// 用户输入框
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private EditText userNameEdit;
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// 用户列表
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private List<UserJsonData> users = new ArrayList<>();
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// 显示列表
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private RecyclerView recyclerView;
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// 适配器
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private FriendRecyclerViewAdapter adapter;
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// 登录用户的 json 信息
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private UserJsonData loginUser;
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// 返回按钮
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private TextView backText;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_add_friend);
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// 初始化控件
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initView();
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}
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private void initView() {
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// 获取当前登录用户
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loginUser = parseUserFromString(getIntent().getStringExtra("user_data"));
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// 初始化控件
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userNameEdit = findViewById(R.id.add_friend_edit);
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userNameEdit.requestFocus();
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recyclerView = findViewById(R.id.add_friend_list);
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backText = findViewById(R.id.add_friend_back);
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backText.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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finish();
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}
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});
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LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
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recyclerView.setLayoutManager(linearLayoutManager);
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// 适配器
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adapter = new FriendRecyclerViewAdapter();
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recyclerView.setAdapter(adapter);
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userNameEdit.setOnEditorActionListener(this);
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}
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// 更新搜索列表
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private void updateUserList(final String key) {
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new Thread(new Runnable() {
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@Override
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public void run() {
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final String json = new Gson().fromJson(HttpUtil.Get(HttpUtil.QUERY_URL + "?key=" + key), JsonData.class).getObj();
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runOnUiThread(new Runnable() {
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@Override
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public void run() {
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// 通过解析 json 获得用户列表
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users = new Gson().fromJson(json, new TypeToken<List<UserJsonData>>(){}.getType());
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adapter.updateList();
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Toast.makeText(AddFriendActivity.this, "一共找到" + users.size() + "位用户", Toast.LENGTH_SHORT).show();
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}
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});
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}
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}).start();
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}
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// 设置输入框是否可以进行输入
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private void setEditTextActive(final boolean active) {
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runOnUiThread(new Runnable() {
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@Override
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public void run() {
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userNameEdit.setFocusable(active);
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userNameEdit.setFocusableInTouchMode(active);
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}
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});
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}
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// 进行搜索
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private void search(final EditText editText) {
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// 隐藏软键盘
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((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE)).toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
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if (editText.getText().toString().length() == 0) {
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Toast.makeText(this, "请输入用户名！", Toast.LENGTH_SHORT).show();
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return;
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}
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new Thread(new Runnable() {
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@Override
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public void run() {
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// 禁用输入框
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setEditTextActive(false);
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// 得到输入数据
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String key = editText.getText().toString();
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// 更新列表数据
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updateUserList(key);
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// 启用输入框
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setEditTextActive(true);
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}
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}).start();
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}
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// 添加好友
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private void addFriend(final UserJsonData addUser) {
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new Thread(new Runnable() {
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@Override
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public void run() {
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// 获取返回数据，传入登录用户和添加用户
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String data = HttpUtil.Get(HttpUtil.ADD_FRIEND_URL + "?userId=" + loginUser.getId() + "&friendId=" + addUser.getId());
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final JsonData jsonData = new Gson().fromJson(data, JsonData.class);
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// 更新 UI
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runOnUiThread(new Runnable() {
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@Override
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public void run() {
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Toast.makeText(AddFriendActivity.this, addUser.getNickname() + " " + jsonData.getObj(), Toast.LENGTH_SHORT).show();
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}
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});
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}
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}).start();
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}
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// 输入动作发生时
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@Override
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public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
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if (actionId == EditorInfo.IME_ACTION_SEARCH) {
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// 如果按了软键盘上的搜索键
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search(userNameEdit);
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}
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return false;
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}
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class FriendRecyclerViewAdapter extends RecyclerView.Adapter {
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@NonNull
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@Override
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public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
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// 创建子项
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View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.add_friend_item, viewGroup, false);
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UserHolder holder = new UserHolder(view);
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return holder;
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}
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@Override
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public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
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// 得到对应项的数据
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UserJsonData data = users.get(i);
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UserHolder userHolder = (UserHolder)viewHolder;
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// 设置昵称
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userHolder.userName.setText(data.getNickname());
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// 设置对应的按钮的 Tag
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userHolder.addButton.setTag(users.get(i));
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}
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// 更新列表
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public void updateList() {
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notifyDataSetChanged();
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}
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// 清空用户列表，不过似乎我没用到
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public void clear() {
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users.clear();
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updateList();
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}
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// 得到项目数量
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@Override
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public int getItemCount() {
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return users.size();
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}
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// Holder
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class UserHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
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TextView userName;
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Button addButton;
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public UserHolder(@NonNull View itemView) {
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super(itemView);
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userName = itemView.findViewById(R.id.friend_name);
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addButton = itemView.findViewById(R.id.add_friend);
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addButton.setOnClickListener(this);
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}
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@Override
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public void onClick(View v) {
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// 获得对应的用户数据
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UserJsonData userJsonData = (UserJsonData) addButton.getTag();
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// 添加好友
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addFriend(userJsonData);
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}
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}
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}
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}

‎main/java/top/grapedge/grapeschat/BaseActivity.java

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package top.grapedge.grapeschat;
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import android.graphics.Rect;
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import android.os.Bundle;
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import android.support.annotation.Nullable;
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import android.support.v7.app.AppCompatActivity;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.ViewTreeObserver;
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import android.view.inputmethod.InputMethodManager;
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import android.widget.EditText;
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import com.google.gson.Gson;
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public class BaseActivity extends AppCompatActivity {
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// 使用这个键值表示创建
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public final static String EXTRA_USER_DATA = "user_data";
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protected DataManager dataManager;
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// protected UserJsonData loginUser;
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@Override
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protected void onCreate(@Nullable Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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dataManager = new DataManager(this);
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}
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// 实现点击空白处隐藏软键盘
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protected void touchBlank(View v, MotionEvent ev) {
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if (v != null && v instanceof EditText) {
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Rect rect = new Rect();
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v.getHitRect(rect);
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// 判断点击点是否在编辑框区域外
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if (!rect.contains((int)ev.getX(), (int)ev.getY())) {
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// 隐藏软键盘
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((InputMethodManager)getSystemService(INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(v.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
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}
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}
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}
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public UserJsonData parseUserFromString(String obj) {
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if (obj == null) return new UserJsonData();
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return new Gson().fromJson(obj, UserJsonData.class);
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}
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// 分发点击事件
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@Override
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public boolean dispatchTouchEvent(MotionEvent ev) {
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if (ev.getAction() == MotionEvent.ACTION_DOWN) {
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touchBlank (getCurrentFocus(), ev);
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}
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return super.dispatchTouchEvent(ev);
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}
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// 防止遮挡控件
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private int scrollTo = 0;
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protected void scrollToView(final View scrollView, final View targetView) {
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scrollView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
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@Override
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public void onGlobalLayout() {
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Rect rect = new Rect();
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// 获得可见区域的高度
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scrollView.getWindowVisibleDisplayFrame(rect);
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// 父布局的高度减去可见区域的底部高度就是不可见区域的高度
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int invisibleHeight = scrollView.getRootView().getHeight() - rect.bottom;
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// 如果不可见高度大于150说明键盘已经打开
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if (invisibleHeight > 150) {
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// 下面的部分和 ScrollView 版是相似原理
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int[] location = new int[2];
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targetView.getLocationInWindow(location);
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scrollTo += location[1] + targetView.getHeight() - rect.bottom;
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} else scrollTo = 0;
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scrollView.scrollTo(0, scrollTo);
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}
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});
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}
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}

‎main/java/top/grapedge/grapeschat/BaseFragment.java

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package top.grapedge.grapeschat;
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import android.os.Bundle;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.support.v4.app.Fragment;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import com.google.gson.Gson;
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public class BaseFragment extends Fragment {
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public static final String EXTRA_USER_DATA = BaseActivity.EXTRA_USER_DATA;
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// 当前登录用户
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protected UserJsonData loginUser;
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// 登录用户的json信息
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protected String loginUserJson;
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public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
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loginUserJson = getActivity().getIntent().getStringExtra(EXTRA_USER_DATA);
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loginUser = new Gson().fromJson(loginUserJson, UserJsonData.class);
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return initView(inflater, container, savedInstanceState);
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}
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public View initView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
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return super.onCreateView(inflater, container, savedInstanceState);
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}
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}

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