Android 流式布局 + 搜索记录,包括多数据本地存储

转载地址为:http://www.jianshu.com/p/50675a10fce6

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>