直接上代码: 有两个类 :MainActivity 和 FlowLayout,还有三个xml文件,
package com.paradoxie.flowlayout_searchhistory; import android.app.Activity; import android.content.SharedPreferences; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.text.Editable; import android.text.TextUtils; import android.text.TextWatcher; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private FlowLayout mFlowLayout; private LayoutInflater mInflater; private String[] mVals = new String[]{"Java", "Android", "iOS", "Python", "Mac OS", "PHP", "JavaScript", "Objective-C", "Groovy", "Pascal", "Ruby", "Go", "Swift"};//数据模拟，实际应从网络获取此数据 /************ * 以上为流式标签相关 ************/ public static final String EXTRA_KEY_TYPE = "extra_key_type"; public static final String EXTRA_KEY_KEYWORD = "extra_key_keyword"; public static final String KEY_SEARCH_HISTORY_KEYWORD = "key_search_history_keyword"; private SharedPreferences mPref;//使用SharedPreferences记录搜索历史 private String mType; private EditText input; private Button btn_search; private List<String> mHistoryKeywords;//记录文本 private ArrayAdapter<String> mArrAdapter;//搜索历史适配器 private LinearLayout mSearchHistoryLl; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initFlowView(); initHistoryView(); } private void initFlowView() { mInflater = LayoutInflater.from(this); mFlowLayout = (FlowLayout) findViewById(R.id.flowlayout); initData(); } /** * 将数据放入流式布局 */ private void initData() { for (int i = 0; i < mVals.length; i++) { TextView tv = (TextView) mInflater.inflate( R.layout.search_label_tv, mFlowLayout, false); tv.setText(mVals[i]); final String str = tv.getText().toString(); //点击事件 tv.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //加入搜索历史纪录记录 Toast.makeText(MainActivity.this, str, Toast.LENGTH_LONG).show(); } }); mFlowLayout.addView(tv); } } /************ * 以上为流式标签相关 ************/ private void initHistoryView() { input = (EditText) findViewById(R.id.et_input); btn_search = (Button) findViewById(R.id.btn_search); btn_search.setOnClickListener(this); mPref = getSharedPreferences("input", Activity.MODE_PRIVATE); mType = getIntent().getStringExtra(EXTRA_KEY_TYPE); String keyword = getIntent().getStringExtra(EXTRA_KEY_KEYWORD); if (!TextUtils.isEmpty(keyword)) { input.setText(keyword); } mHistoryKeywords = new ArrayList<String>(); input = (EditText) findViewById(R.id.et_input); input.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { if (s.length() == 0) { if (mHistoryKeywords.size() > 0) { mSearchHistoryLl.setVisibility(View.VISIBLE); } else { mSearchHistoryLl.setVisibility(View.GONE); } } else { mSearchHistoryLl.setVisibility(View.GONE); } } @Override public void afterTextChanged(Editable s) { } }); initSearchHistory(); } /** * 初始化搜索历史记录 */ public void initSearchHistory() { mSearchHistoryLl = (LinearLayout) findViewById(R.id.search_history_ll); ListView listView = (ListView) findViewById(R.id.search_history_lv); findViewById(R.id.clear_history_btn).setOnClickListener(this); String history = mPref.getString(KEY_SEARCH_HISTORY_KEYWORD, ""); if (!TextUtils.isEmpty(history)) { List<String> list = new ArrayList<String>(); for (Object o : history.split(",")) { list.add((String) o); } mHistoryKeywords = list; } if (mHistoryKeywords.size() > 0) { mSearchHistoryLl.setVisibility(View.VISIBLE); } else { mSearchHistoryLl.setVisibility(View.GONE); } mArrAdapter = new ArrayAdapter<String>(this, R.layout.item_search_history, mHistoryKeywords); listView.setAdapter(mArrAdapter); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { input.setText(mHistoryKeywords.get(i)); mSearchHistoryLl.setVisibility(View.GONE); } }); mArrAdapter.notifyDataSetChanged(); } /** * 储存搜索历史 */ public void save() { String text = input.getText().toString(); String oldText = mPref.getString(KEY_SEARCH_HISTORY_KEYWORD, ""); Log.e("tag", "" + oldText); Log.e("Tag", "" + text); Log.e("Tag", "" + oldText.contains(text)); if (!TextUtils.isEmpty(text) && !(oldText.contains(text))) { if (mHistoryKeywords.size() > 5) { //最多保存条数 return; } SharedPreferences.Editor editor = mPref.edit(); editor.putString(KEY_SEARCH_HISTORY_KEYWORD, text + "," + oldText); editor.commit(); mHistoryKeywords.add(0, text); } mArrAdapter.notifyDataSetChanged(); } /** * 清除历史纪录 */ public void cleanHistory() { mPref = getSharedPreferences("input", MODE_PRIVATE); SharedPreferences.Editor editor = mPref.edit(); editor.remove(KEY_SEARCH_HISTORY_KEYWORD).commit(); mHistoryKeywords.clear(); mArrAdapter.notifyDataSetChanged(); mSearchHistoryLl.setVisibility(View.GONE); Toast.makeText(MainActivity.this, "清楚搜索历史成功", Toast.LENGTH_LONG).show(); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_search: String keywords = input.getText().toString(); if (!TextUtils.isEmpty(keywords)) { Toast.makeText(MainActivity.this, keywords + "save成功", Toast.LENGTH_LONG).show(); save(); } else { Toast.makeText(MainActivity.this, "请输入搜索内容", Toast.LENGTH_LONG).show(); } break; case R.id.clear_history_btn: cleanHistory(); break; default: break; } } }
package com.paradoxie.flowlayout_searchhistory; import android.content.Context; import android.util.AttributeSet; import android.view.View; import android.view.ViewGroup; import java.util.ArrayList; import java.util.List; public class FlowLayout extends ViewGroup { public FlowLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public FlowLayout(Context context, AttributeSet attrs) { this(context, attrs, 0); } public FlowLayout(Context context) { this(context, null); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int sizeWidth = MeasureSpec.getSize(widthMeasureSpec); int modeWidth = MeasureSpec.getMode(widthMeasureSpec); int sizeHeight = MeasureSpec.getSize(heightMeasureSpec); int modeHeight = MeasureSpec.getMode(heightMeasureSpec); // 如果是warp_content情况下，记录宽和高 int width = 0; int height = 0; // 记录每一行的宽度与高度 int lineWidth = 0; int lineHeight = 0; // 得到内部元素的个数 int cCount = getChildCount(); for (int i = 0; i < cCount; i++) { // 通过索引拿到每一个子view View child = getChildAt(i); // 测量子View的宽和高,系统提供的measureChild measureChild(child, widthMeasureSpec, heightMeasureSpec); // 得到LayoutParams MarginLayoutParams lp = (MarginLayoutParams) child .getLayoutParams(); // 子View占据的宽度 int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin; // 子View占据的高度 int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin; // 换行 判断 当前的宽度大于 开辟新行 if (lineWidth + childWidth > sizeWidth - getPaddingLeft() - getPaddingRight()) { // 对比得到最大的宽度 width = Math.max(width, lineWidth); // 重置lineWidth lineWidth = childWidth; // 记录行高 height += lineHeight; lineHeight = childHeight; } else // 未换行 { // 叠加行宽 lineWidth += childWidth; // 得到当前行最大的高度 lineHeight = Math.max(lineHeight, childHeight); } // 特殊情况,最后一个控件 if (i == cCount - 1) { width = Math.max(lineWidth, width); height += lineHeight; } } setMeasuredDimension( modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width + getPaddingLeft() + getPaddingRight(), modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height + getPaddingTop() + getPaddingBottom()// ); } /** * 存储所有的View */ private List<List<View>> mAllViews = new ArrayList<List<View>>(); /** * 每一行的高度 */ private List<Integer> mLineHeight = new ArrayList<Integer>(); @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { mAllViews.clear(); mLineHeight.clear(); // 当前ViewGroup的宽度 int width = getWidth(); int lineWidth = 0; int lineHeight = 0; // 存放每一行的子view List<View> lineViews = new ArrayList<View>(); int cCount = getChildCount(); for (int i = 0; i < cCount; i++) { View child = getChildAt(i); MarginLayoutParams lp = (MarginLayoutParams) child .getLayoutParams(); int childWidth = child.getMeasuredWidth(); int childHeight = child.getMeasuredHeight(); // 如果需要换行 if (childWidth + lineWidth + lp.leftMargin + lp.rightMargin > width - getPaddingLeft() - getPaddingRight()) { // 记录LineHeight mLineHeight.add(lineHeight); // 记录当前行的Views mAllViews.add(lineViews); // 重置我们的行宽和行高 lineWidth = 0; lineHeight = childHeight + lp.topMargin + lp.bottomMargin; // 重置我们的View集合 lineViews = new ArrayList<View>(); } lineWidth += childWidth + lp.leftMargin + lp.rightMargin; lineHeight = Math.max(lineHeight, childHeight + lp.topMargin + lp.bottomMargin); lineViews.add(child); }// for end // 处理最后一行 mLineHeight.add(lineHeight); mAllViews.add(lineViews); // 设置子View的位置 int left = getPaddingLeft(); int top = getPaddingTop(); // 行数 int lineNum = mAllViews.size(); for (int i = 0; i < lineNum; i++) { // 当前行的所有的View lineViews = mAllViews.get(i); lineHeight = mLineHeight.get(i); for (int j = 0; j < lineViews.size(); j++) { View child = lineViews.get(j); // 判断child的状态 if (child.getVisibility() == View.GONE) { continue; } MarginLayoutParams lp = (MarginLayoutParams) child .getLayoutParams(); int lc = left + lp.leftMargin; int tc = top + lp.topMargin; int rc = lc + child.getMeasuredWidth(); int bc = tc + child.getMeasuredHeight(); // 为子View进行布局 child.layout(lc, tc, rc, bc); left += child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin; } left = getPaddingLeft(); top += lineHeight; } } /** * 与当前ViewGroup对应的LayoutParams */ @Override public LayoutParams generateLayoutParams(AttributeSet attrs) { return new MarginLayoutParams(getContext(), attrs); } }
下面是 item_search_history.xml:
<?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/contentTextView" android:layout_width="match_parent" android:layout_height="51dp" android:paddingLeft="10dp" android:gravity="center_vertical" android:background="@drawable/list_item_selector" android:textSize="14sp" android:textColor="#ff403b37"/>
search_lable_tv.xml:
<?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="5dp" android:background="@drawable/search_label" android:paddingBottom="10dp" android:paddingLeft="20dp" android:paddingRight="20dp" android:paddingTop="10dp" android:text="Helloworld" android:textColor="#3f3e3e" android:textSize="14sp"> </TextView>
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="@dimen/activity_vertical_margin" tools:context="com.paradoxie.flowlayout_searchhistory.MainActivity"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:orientation="horizontal"> <EditText android:id="@+id/et_input" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_weight="1" android:hint="请输入你想搜索的内容" android:maxLines="1" android:paddingLeft="5dp" android:paddingRight="5dp"/> <Button android:id="@+id/btn_search" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="5dp" android:text="搜索"/> </LinearLayout> <LinearLayout android:id="@+id/layout_notice" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <com.paradoxie.flowlayout_searchhistory.FlowLayout android:id="@+id/flowlayout" android:layout_width="match_parent" android:layout_height="wrap_content"> </com.paradoxie.flowlayout_searchhistory.FlowLayout> <LinearLayout android:id="@+id/search_history_ll" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:visibility="gone"> <TextView android:id="@+id/contentTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingBottom="4dp" android:paddingLeft="10dp" android:paddingTop="4dp" android:text="历史搜索" android:textSize="12sp"/> <ListView android:id="@+id/search_history_lv" style="@style/common_list" android:layout_width="match_parent" android:layout_height="wrap_content" android:divider="@color/default_line_color" android:dividerHeight="0.5dp" android:listSelector="@drawable/list_item_selector"> </ListView> <Button android:id="@+id/clear_history_btn" android:layout_width="210dp" android:layout_height="38dp" android:layout_gravity="center" android:layout_marginTop="5dp" android:background="@drawable/round_btn_selector" android:text="清除历史搜索记录" android:textSize="14sp"/> </LinearLayout> </LinearLayout> </LinearLayout>